1. 集群环境准备

1.1. 主机规划

1.2. 软件版本

1.3. 网络分配

2. 集群部署

2.1. 主机准备

UUID也需要修改，每个主机的UUID必须要设置不一致，MAC地址也必须不一样，对于通过虚拟机clone的方式尤其需要注意，他们的UUID, MAC地址极有可能是一样的
分别修改每台主机的IP地址，以及hostname；由于我这里每台主机都是通过VMware克隆出来的，所以其主机IP都是一样的

# 时间同步
yum install -y chrony
systemctl start chronyd
systemctl enable chronyd
chronyc sources
# 关闭防火墙
systemctl disable --now firewalld
# 关闭selinux
setenforce 0
sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/sysconfig/selinux
sestatus
# 关闭交换分区
sed -ri 's/.*swap.*/#&/' /etc/fstab
swapoff -a && sysctl -w vm.swappiness=0
cat /etc/fstab
# 时间同步
yum install -y chrony
systemctl start chronyd
systemctl enable chronyd
chronyc sources
# 网络配置
# 方式一
# systemctl disable --now NetworkManager
# systemctl start network && systemctl enable network
# 方式二
cat > /etc/NetworkManager/conf.d/calico.conf << EOF
[keyfile]
unmanaged-devices=interface-name:cali*;interface-name:tunl*
EOF
systemctl restart NetworkManager
# 主机系统优化
ulimit -SHn 65535
cat >> /etc/security/limits.conf <<EOF
* soft nofile 655360
* hard nofile 131072
* soft nproc 655350
* hard nproc 655350
* seft memlock unlimited
* hard memlock unlimitedd
EOF
yum install ipvsadm ipset sysstat conntrack libseccomp -y
tee /etc/modules-load.d/ipvs.conf << 'EOF'
ip_vs
ip_vs_lc
ip_vs_wlc
ip_vs_rr
ip_vs_wrr
ip_vs_lblc
ip_vs_lblcr
ip_vs_dh
ip_vs_sh
ip_vs_fo
ip_vs_nq
ip_vs_sed
ip_vs_ftp
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
EOF
systemctl restart systemd-modules-load.service
# 查看模块是否已经被启用
lsmod | grep -e ip_vs -e nf_conntrack
# 优化内核参数
tee /etc/sysctl.d/k8s.conf << 'EOF'
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
fs.may_detach_mounts = 1
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.netfilter.nf_conntrack_max=2310720
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl =15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.ip_conntrack_max = 65536
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384
net.ipv6.conf.all.disable_ipv6 = 0
net.ipv6.conf.default.disable_ipv6 = 0
net.ipv6.conf.lo.disable_ipv6 = 0
net.ipv6.conf.all.forwarding = 1
EOF
sysctl --system
# 加载containerd相关内核模块
modprobe overlay
modprobe br_netfilter
tee /etc/modules-load.d/containerd.conf << 'EOF'
overlay
br_netfileter
EOF
systemctl enable --now systemd-modules-load.service
# 安装必备工具
yum -y install wget jq psmisc vim net-tools tree telnet yum-utils device-mapper-persistent-data lvm2 git network-scripts tar curl -y
reboot

重启之后需要查看一下ipvs, containerd相关模块加载情况

lsmod | grep --color=auto -e ip_vs -e nf_conntrack
lsmod | egrep 'br_netfilter | overlay'

2.2. 下载etcd, k8s, cfssl软件安装包

• K8S版本可以参考该目录
  • github参考地址

# 创建工作目录
mkdir -p /data/work
cd /data/work
# 下载cfssl工具
CFSSL_VERSION=1.6.3
#wget -O cfssl_linux-amd64 https://ghproxy.com/https://github.com/cloudflare/cfssl/releases/download/v${CFSSL_VERSION}/cfssl_${CFSSL_VERSION}_linux_amd64
#wget -O cfssljson_linux-amd64 https://ghproxy.com/https://github.com/cloudflare/cfssl/releases/download/v${CFSSL_VERSION}/cfssljson_${CFSSL_VERSION}_linux_amd64
#wget -O cfssl-certinfo_linux-amd64 https://ghproxy.com/https://github.com/cloudflare/cfssl/releases/download/v${CFSSL_VERSION}/cfssl-certinfo_${CFSSL_VERSION}_linux_amd64
chmod +x cfssl*
mv cfssl_linux-amd64 /usr/local/bin/cfssl
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
mv cfssl-certinfo_linux-amd64 /usr/local/bin/cfssl-certinfo
ETCD_VERSION=v3.5.4
#wget https://ghproxy.com/https://github.com/etcd-io/etcd/releases/download/${ETCD_VERSION}/etcd-${ETCD_VERSION}-linux-amd64.tar.gz
tar -zxvf etcd-${ETCD_VERSION}-linux-amd64.tar.gz
cp -ar etcd-${ETCD_VERSION}-linux-amd64/etcd* /usr/local/bin
chmod +x /usr/local/bin/etcd*
ls -ll /usr/local/bin/etcd*
etcdctl version
K8S_VERSION=v1.21.14
#wget https://storage.googleapis.com/kubernetes-release/release/${K8S_VERSION}/kubernetes-server-linux-amd64.tar.gz
tar zxvf kubernetes-server-linux-amd64.tar.gz
cd
kubernetes/server/bin/
cp kube-apiserver kube-controller-manager kube-scheduler kubectl kubelet kube-proxy /usr/local/bin/
# 退出目录，回到/data/work工作目录中，后续所有的操作依然在本目录中
cd /data/work/

2.3. 生成CA证书

tee ca-csr.json << 'EOF'
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
cfssl gencert -initca ca-csr.json
| cfssljson -bare ca
tee ca-config.json << 'EOF'
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "876000h"
}
}
}
}
EOF
mkdir -p /etc/kubernetes/pki
cp ca*.pem /etc/kubernetes/pki/

2.4. 部署ETCD

2.4.1. 启动ETCD

# 创建etcd csr请求文件
tee etcd-csr.json << 'EOF'
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
]
}
EOF
# 生成etcd相关证书
cfssl gencert 
-ca=ca.pem 
-ca-key=ca-key.pem 
-config=ca-config.json 
-hostname=127.0.0.1,k8s-master1,192.168.11.71 
-profile=kubernetes 
etcd-csr.json | cfssljson -bare etcd
ls -ll etcd*.pem
# 创建ETCD服务配置文件
tee etcd-config.yml << 'EOF'
name: 'etcd1'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://192.168.11.71:2380'
listen-client-urls: 'https://192.168.11.71:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://192.168.11.71:2380'
advertise-client-urls: 'https://192.168.11.71:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'etcd1=https://192.168.11.71:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/etc/kubernetes/pki/etcd/etcd.pem'
key-file: '/etc/kubernetes/pki/etcd/etcd-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/etc/kubernetes/pki/ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
# 创建etcd服务启动文件
tee etcd.service << 'EOF'
[Unit]
Description=Etcd Service
Documentation=https://coreos.com/etcd/docs/latest/
After=network.target
[Service]
Type=notify
ExecStart=/usr/local/bin/etcd --config-file=/etc/etcd/etcd-config.yml
Restart=on-failure
RestartSec=10
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
Alias=etcd3.service
EOF
mkdir -p /etc/etcd/ssl
cp etcd*.pem /etc/etcd/ssl/
cp etcd-config.yml /etc/etcd/
cp etcd.service /usr/lib/systemd/system/
mkdir -p /etc/kubernetes/pki/etcd
ln -s /etc/etcd/ssl/* /etc/kubernetes/pki/etcd/
mkdir -p /var/lib/etcd
# 启动ETCD
systemctl daemon-reload && systemctl enable etcd.service && systemctl start etcd.service

2.4.2. 验证ETCD的状态

# 查看ETCD各节点的健康状态
ETCDCTL_API=3 && /usr/local/bin/etcdctl --write-out=table --cacert=/etc/kubernetes/pki/ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem --endpoints=https://192.168.11.71:2379 endpoint health
# 查看成员列表
ETCDCTL_API=3 && /usr/local/bin/etcdctl --write-out=table --cacert=/etc/kubernetes/pki/ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem --endpoints=https://192.168.11.71:2379 member list
# 查看数据库大小以及哪个节点是Leader节点
ETCDCTL_API=3 && /usr/local/bin/etcdctl --write-out=table --cacert=/etc/kubernetes/pki/ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem --endpoints=https://192.168.11.71:2379 endpoint status
# 检查ETCD的性能
ETCDCTL_API=3 && /usr/local/bin/etcdctl --write-out=table --cacert=/etc/kubernetes/pki/ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem --endpoints=https://192.168.11.71:2379 check perf

执行结果

[root@k8s-master1 work]# # 查看ETCD各节点的健康状态
[root@k8s-master1 work]# ETCDCTL_API=3 && /usr/local/bin/etcdctl --write-out=table --cacert=/etc/kubernetes/pki/ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem --endpoints=https://192.168.11.71:2379 endpoint health
+----------------------------+--------+-------------+-------+
|
ENDPOINT
| HEALTH |
TOOK
| ERROR |
+----------------------------+--------+-------------+-------+
| https://192.168.11.71:2379 |
true | 14.286573ms |
|
+----------------------------+--------+-------------+-------+
[root@k8s-master1 work]#
[root@k8s-master1 work]# # 查看成员列表
[root@k8s-master1 work]# ETCDCTL_API=3 && /usr/local/bin/etcdctl --write-out=table --cacert=/etc/kubernetes/pki/ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem --endpoints=https://192.168.11.71:2379 member list
+------------------+---------+-------+----------------------------+----------------------------+------------+
|
ID
| STATUS
| NAME
|
PEER ADDRS
|
CLIENT ADDRS
| IS LEARNER |
+------------------+---------+-------+----------------------------+----------------------------+------------+
| 5ce02800cf5f635d | started | etcd1 | https://192.168.11.71:2380 | https://192.168.11.71:2379 |
false |
+------------------+---------+-------+----------------------------+----------------------------+------------+
[root@k8s-master1 work]#
[root@k8s-master1 work]# # 查看数据库大小以及哪个节点是Leader节点
[root@k8s-master1 work]# ETCDCTL_API=3 && /usr/local/bin/etcdctl --write-out=table --cacert=/etc/kubernetes/pki/ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem --endpoints=https://192.168.11.71:2379 endpoint status
+----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
|
ENDPOINT
|
ID
| VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS |
+----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
| https://192.168.11.71:2379 | 5ce02800cf5f635d |
3.5.4 |
20 kB |
true |
false |
2 |
5 |
5 |
|
+----------------------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
[root@k8s-master1 work]#
[root@k8s-master1 work]# # 检查ETCD的性能
[root@k8s-master1 work]# ETCDCTL_API=3 && /usr/local/bin/etcdctl --write-out=table --cacert=/etc/kubernetes/pki/ca.pem --cert=/etc/kubernetes/pki/etcd/etcd.pem --key=/etc/kubernetes/pki/etcd/etcd-key.pem --endpoints=https://192.168.11.71:2379 check perf
59 / 60 Booooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooom
!
98.33%PASS: Throughput is 150 writes/s
PASS: Slowest request took 0.073586s
PASS: Stddev is 0.002288s
PASS
[root@k8s-master1 work]#

2.5. 部署apiserver

2.5.1. 启动apiserver

tee kube-apiserver-csr.json << 'EOF'
{
"CN": "kube-apiserver",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "Kubernetes",
"OU": "Kubernetes-manual"
}
]
}
EOF
# 生成apiserver证书
cfssl gencert

-ca=ca.pem

-ca-key=ca-key.pem

-config=ca-config.json

-hostname=10.96.0.1,127.0.0.1,kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.default.svc.cluster.local,192.168.11.71

-profile=kubernetes
kube-apiserver-csr.json | cfssljson -bare kube-apiserver
# 这里必须使用cat命令，不能使用tee命令，否者这里的$(head -c 16 /dev/urandom | od -An -t x | tr -d ' ')不会被解析
cat > token.csv << EOF
$(head -c 16 /dev/urandom | od -An -t x | tr -d ' '),kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF
# 创建apiserver配置文件
tee kube-apiserver.conf << 'EOF'
tee /etc/kubernetes/kube-apiserver.conf << 'EOF'
KUBE_APISERVER_OPTS="--enable-admission-plugins=NamespaceLifecycle,NodeRestriction,LimitRanger,ServiceAccount,DefaultStorageClass,ResourceQuota,DefaultTolerationSeconds 
--anonymous-auth=false 
--bind-address=192.168.11.71 
--secure-port=6443 
--advertise-address=192.168.11.71 
--authorization-mode=Node,RBAC 
--runtime-config=api/all=true 
--enable-bootstrap-token-auth=true 
--service-cluster-ip-range=10.96.0.0/12 
--token-auth-file=/etc/kubernetes/token.csv 
--service-node-port-range=0-50000 
--tls-cert-file=/etc/kubernetes/pki/kube-apiserver.pem

--tls-private-key-file=/etc/kubernetes/pki/kube-apiserver-key.pem 
--client-ca-file=/etc/kubernetes/pki/ca.pem 
--kubelet-client-certificate=/etc/kubernetes/pki/kube-apiserver.pem 
--kubelet-client-key=/etc/kubernetes/pki/kube-apiserver-key.pem 
--service-account-key-file=/etc/kubernetes/pki/ca-key.pem 
--service-account-signing-key-file=/etc/kubernetes/pki/ca-key.pem

--service-account-issuer=https://kubernetes.default.svc.cluster.local 
--etcd-cafile=/etc/kubernetes/pki/ca.pem 
--etcd-certfile=/etc/kubernetes/pki/etcd/etcd.pem 
--etcd-keyfile=/etc/kubernetes/pki/etcd/etcd-key.pem 
--etcd-servers=https://192.168.11.71:2379 
--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname 
--allow-privileged=true 
--apiserver-count=3 
--audit-log-maxage=30 
--audit-log-maxbackup=3 
--audit-log-maxsize=100 
--audit-log-path=/var/log/kube-apiserver-audit.log 
--event-ttl=1h 
--alsologtostderr=true 
--logtostderr=false 
--log-dir=/var/log/kubernetes 
--v=4"
EOF
# 创建apiserver服务启动文件
tee kube-apiserver.service << 'EOF'
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=etcd.service
Wants=etcd.service
[Service]
EnvironmentFile=-/etc/kubernetes/kube-apiserver.conf
ExecStart=/usr/local/bin/kube-apiserver $KUBE_APISERVER_OPTS
Restart=on-failure
RestartSec=5
Type=notify
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
# 移动apiserver配置文件到相应位置
cp kube-apiserver*.pem /etc/kubernetes/pki/
cp token.csv /etc/kubernetes/
cp kube-apiserver.conf /etc/kubernetes/
cp kube-apiserver.service /usr/lib/systemd/system/
mkdir -p /etc/kubernetes/manifests/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes
# 启动服务
systemctl daemon-reload && systemctl enable kube-apiserver && systemctl start kube-apiserver

2.5.2. 校验api-server服务是否正常启动

systemctl status kube-apiserver
curl --insecure https://192.168.11.71:6443/

执行结果

[root@k8s-master1 ~]# systemctl status kube-apiserver
● kube-apiserver.service - Kubernetes API Server
Loaded: loaded (/usr/lib/systemd/system/kube-apiserver.service; enabled;
vendor preset: disabled)
Active: active (running) since Thu 2022-11-17 22:16:20 CST; 1min 25s ago
Docs: https://github.com/kubernetes/kubernetes
Main PID: 52956 (kube-apiserver)
CGroup: /system.slice/kube-apiserver.service
└─52956 /usr/local/bin/kube-apiserver --enable-admission-plugi...
Nov 17 22:17:22 k8s-master1 kube-apiserver[52956]: I1117 22:17:22.478545 ...
Nov 17 22:17:22 k8s-master1 kube-apiserver[52956]: I1117 22:17:22.484930 ...
Nov 17 22:17:32 k8s-master1 kube-apiserver[52956]: I1117 22:17:32.464028 ...
Nov 17 22:17:32 k8s-master1 kube-apiserver[52956]: I1117 22:17:32.469795 ...
Nov 17 22:17:32 k8s-master1 kube-apiserver[52956]: I1117 22:17:32.481656 ...
Nov 17 22:17:32 k8s-master1 kube-apiserver[52956]: I1117 22:17:32.485503 ...
Nov 17 22:17:42 k8s-master1 kube-apiserver[52956]: I1117 22:17:42.463590 ...
Nov 17 22:17:42 k8s-master1 kube-apiserver[52956]: I1117 22:17:42.467854 ...
Nov 17 22:17:42 k8s-master1 kube-apiserver[52956]: I1117 22:17:42.480078 ...
Nov 17 22:17:42 k8s-master1 kube-apiserver[52956]: I1117 22:17:42.486241 ...
Hint: Some lines were ellipsized, use -l to show in full.
[root@k8s-master1 ~]#
[root@k8s-master1 ~]# curl --insecure https://192.168.11.71:6443/
{
"kind": "Status",
"apiVersion": "v1",
"metadata": {},
"status": "Failure",
"message": "Unauthorized",
"reason": "Unauthorized",
"code": 401
[root@k8s-master1 ~]#

2.6. 部署kubectl

2.6.1. 创建CSR文件

tee admin-csr.json << 'EOF'
{
"CN": "admin",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:masters",
"OU": "Kubernetes-manual"
}
]
}
EOF
# 生成admin证书
cfssl gencert 
-ca=ca.pem 
-ca-key=ca-key.pem 
-config=ca-config.json 
-profile=kubernetes 
admin-csr.json | cfssljson -bare admin
kubectl config set-cluster kubernetes --certificate-authority=ca.pem --embed-certs=true --server=https://192.168.11.71:6443 --kubeconfig=kube.config
# 设置客户端认证参数
kubectl config set-credentials admin --client-certificate=admin.pem --client-key=admin-key.pem --embed-certs=true --kubeconfig=kube.config
# 设置上下文参数
kubectl config set-context kubernetes --cluster=kubernetes --user=admin --kubeconfig=kube.config
# 设置当前上下文
kubectl config use-context kubernetes --kubeconfig=kube.config
mkdir -p ~/.kube
cp kube.config ~/.kube/config
cp kube.config /etc/kubernetes/admin.conf
# 授权kubernetes证书访问kubelet api权限
kubectl create clusterrolebinding kube-apiserver:kubelet-apis --clusterrole=system:kubelet-api-admin --user kubernetes --kubeconfig=/root/.kube/config
yum install -y bash-completion
source /usr/share/bash-completion/bash_completion
source <(kubectl completion bash)
kubectl completion bash > ~/.kube/completion.bash.inc
source '/root/.kube/completion.bash.inc'
source $HOME/.bash_profile

2.6.2. 查看集群状态

kubectl cluster-info
kubectl get componentstatuses
kubectl get all --all-namespaces

2.7. 部署kube-controller-manager

2.7.1. 启动kube-controller-manager

tee kube-controller-manager-csr.json << 'EOF'
{
"CN": "system:kube-controller-manager",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-controller-manager",
"OU": "Kubernetes-manual"
}
]
}
EOF
# 创建controller-manager证书
cfssl gencert 
-ca=ca.pem 
-ca-key=ca-key.pem 
-hostname=127.0.0.1,192.168.11.71 
-config=ca-config.json 
-profile=kubernetes 
kube-controller-manager-csr.json | cfssljson -bare kube-controller-manager
# 创建Kube-controller-manager的kubeconfig
kubectl config set-cluster kubernetes 
--certificate-authority=ca.pem 
--embed-certs=true 
--server=https://192.168.11.71:6443 
--kubeconfig=kube-controller-manager.kubeconfig
# 设置客户端认证参数
kubectl config set-credentials system:kube-controller-manager 
--client-certificate=kube-controller-manager.pem 
--client-key=kube-controller-manager-key.pem 
--embed-certs=true 
--kubeconfig=kube-controller-manager.kubeconfig
# 设置上下文参数
kubectl config set-context system:kube-controller-manager@kubernetes 
--cluster=kubernetes 
--user=system:kube-controller-manager 
--kubeconfig=kube-controller-manager.kubeconfig
# 设置当前上下文
kubectl config use-context system:kube-controller-manager@kubernetes 
--kubeconfig=kube-controller-manager.kubeconfig
# 创建controller-manager配置文件
tee kube-controller-manager.conf << 'EOF'
KUBE_CONTROLLER_MANAGER_OPTS="--secure-port=10257 
--bind-address=127.0.0.1 
--kubeconfig=/etc/kubernetes/kube-controller-manager.kubeconfig 
--service-cluster-ip-range=10.96.0.0/12 
--cluster-name=kubernetes 
--cluster-signing-cert-file=/etc/kubernetes/pki/ca.pem 
--cluster-signing-key-file=/etc/kubernetes/pki/ca-key.pem 
--allocate-node-cidrs=true 
--cluster-cidr=172.16.0.0/12 
--root-ca-file=/etc/kubernetes/pki/ca.pem 
--service-account-private-key-file=/etc/kubernetes/pki/ca-key.pem 
--leader-elect=true 
--feature-gates=RotateKubeletServerCertificate=true 
--controllers=*,bootstrapsigner,tokencleaner 
--horizontal-pod-autoscaler-sync-period=10s 
--tls-cert-file=/etc/kubernetes/pki/kube-controller-manager.pem 
--tls-private-key-file=/etc/kubernetes/pki/kube-controller-manager-key.pem 
--use-service-account-credentials=true 
--alsologtostderr=true 
--logtostderr=false 
--log-dir=/var/log/kubernetes 
--v=2"
EOF
# 创建服务启动文件
tee kube-controller-manager.service << 'EOF'
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=-/etc/kubernetes/kube-controller-manager.conf
ExecStart=/usr/local/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF
# 复制配置文件到对应目录
cp kube-controller-manager*.pem /etc/kubernetes/pki/
cp kube-controller-manager.kubeconfig /etc/kubernetes/
cp kube-controller-manager.conf /etc/kubernetes/
cp kube-controller-manager.service /usr/lib/systemd/system/
systemctl daemon-reload
&&systemctl enable kube-controller-manager && systemctl start kube-controller-manager && systemctl status kube-controller-manager

2.7.2. 验证controller-manager服务是否启动成功

kubectl get componentstatuses

2.8. 部署kube-scheduler

2.8.1. 启动kube-scheduler

tee kube-scheduler-csr.json << 'EOF'
{
"CN": "system:kube-scheduler",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-scheduler",
"OU": "Kubernetes-manual"
}
]
}
EOF
# 创建证书
cfssl gencert 
-ca=ca.pem 
-ca-key=ca-key.pem 
-hostname=127.0.0.1,192.168.11.71,192.168.11.72,192.168.11.73 
-config=ca-config.json 
-profile=kubernetes 
kube-scheduler-csr.json | cfssljson -bare kube-scheduler
# 创建kube-scheduler的kubeconfig文件
kubectl config set-cluster kubernetes 
--certificate-authority=ca.pem 
--embed-certs=true 
--server=https://192.168.11.71:6443 
--kubeconfig=kube-scheduler.kubeconfig
# 设置客户端认证参数
kubectl config set-credentials system:kube-scheduler 
--client-certificate=kube-scheduler.pem 
--client-key=kube-scheduler-key.pem 
--embed-certs=true 
--kubeconfig=kube-scheduler.kubeconfig
# 设置上下文参数
kubectl config set-context system:kube-scheduler@kubernetes 
--cluster=kubernetes 
--user=system:kube-scheduler 
--kubeconfig=kube-scheduler.kubeconfig
# 设置当前上下文
kubectl config use-context system:kube-scheduler@kubernetes 
--kubeconfig=kube-scheduler.kubeconfig
# 创建kube-scheduler的配置文件
tee kube-scheduler.conf << 'EOF'
KUBE_SCHEDULER_OPTS="--bind-address=127.0.0.1 
--kubeconfig=/etc/kubernetes/kube-scheduler.kubeconfig 
--leader-elect=true 
--alsologtostderr=true 
--logtostderr=false 
--log-dir=/var/log/kubernetes 
--v=2"
EOF
# 创建kube-scheduler服务启动文件
tee kube-scheduler.service << 'EOF'
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=-/etc/kubernetes/kube-scheduler.conf
ExecStart=/usr/local/bin/kube-scheduler $KUBE_SCHEDULER_OPTS
Restart=on-failure
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF
# 拷贝kube-scheduler到合适的集群节点中
cp kube-scheduler*.pem /etc/kubernetes/ssl/
cp kube-scheduler.kubeconfig /etc/kubernetes/
cp kube-scheduler.conf /etc/kubernetes/
cp kube-scheduler.service /usr/lib/systemd/system/
systemctl daemon-reload &&
systemctl enable kube-scheduler && systemctl start kube-scheduler && systemctl status kube-scheduler

2.8.2. 验证scheduler是否启动成功

kubectl get componentstatuses

2.9. 安装containerd

直接在每个节点上执行以下脚本即可

# 下载containerd
#wget https://ghproxy.com/https://github.com/containerd/containerd/releases/download/v1.6.10/cri-containerd-cni-1.6.10-linux-amd64.tar.gz
# 直接把containerd所有的可执行文件解压至根目录
tar -xvzf cri-containerd-cni-*-linux-amd64.tar.gz -C /
# 替换containerd默认自带的runc
#wget https://ghproxy.com/https://github.com/opencontainers/runc/releases/download/v1.1.2/runc.amd64
mv runc.amd64 runc
chmod +x runc
mv -f runc /usr/local/sbin/
#创建服务启动文件
tee /etc/systemd/system/containerd.service << 'EOF'
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target
[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=infinity
TasksMax=infinity
OOMScoreAdjust=-999
[Install]
WantedBy=multi-user.target
EOF
# 配置containerd所需要的模块
cat <<EOF | tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF
# 加载overlay, br_netfilter模块
systemctl restart systemd-modules-load.service
# 配置contaienrd所需要的内核参数
cat <<EOF | tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables
= 1
net.ipv4.ip_forward
= 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
# 加载内核参数
sysctl --system
# 创建默认配置文件
mkdir -p /etc/containerd
# 创建containerd默认配置文件
#containerd config default | tee /etc/containerd/config.toml
#sed -i "s#SystemdCgroup = false#SystemdCgroup = true#" /etc/containerd/config.toml
#sed -i "s#registry.k8s.io#registry.aliyuncs.com/google_containers#" /etc/containerd/config.toml
# 直接生成配置文件，注意以下版本，这里生成的是containerd 1.6.10的配置，其它版本的配置应该生成默认的配置，然后进行更改
tee /etc/containerd/config.toml << 'EOF'
disabled_plugins = []
imports = []
oom_score = 0
plugin_dir = ""
required_plugins = []
root = "/var/lib/containerd"
state = "/run/containerd"
temp = ""
version = 2
[cgroup]
path = ""
[debug]
address = ""
format = ""
gid = 0
level = ""
uid = 0
[grpc]
address = "/run/containerd/containerd.sock"
gid = 0
max_recv_message_size = 16777216
max_send_message_size = 16777216
tcp_address = ""
tcp_tls_ca = ""
tcp_tls_cert = ""
tcp_tls_key = ""
uid = 0
[metrics]
address = ""
grpc_histogram = false
[plugins]
[plugins."io.containerd.gc.v1.scheduler"]
deletion_threshold = 0
mutation_threshold = 100
pause_threshold = 0.02
schedule_delay = "0s"
startup_delay = "100ms"
[plugins."io.containerd.grpc.v1.cri"]
device_ownership_from_security_context = false
disable_apparmor = false
disable_cgroup = false
disable_hugetlb_controller = true
disable_proc_mount = false
disable_tcp_service = true
enable_selinux = false
enable_tls_streaming = false
enable_unprivileged_icmp = false
enable_unprivileged_ports = false
ignore_image_defined_volumes = false
max_concurrent_downloads = 3
max_container_log_line_size = 16384
netns_mounts_under_state_dir = false
restrict_oom_score_adj = false
sandbox_image = "registry.aliyuncs.com/google_containers/pause:3.6"
selinux_category_range = 1024
stats_collect_period = 10
stream_idle_timeout = "4h0m0s"
stream_server_address = "127.0.0.1"
stream_server_port = "0"
systemd_cgroup = false
tolerate_missing_hugetlb_controller = true
unset_seccomp_profile = ""
[plugins."io.containerd.grpc.v1.cri".cni]
bin_dir = "/opt/cni/bin"
conf_dir = "/etc/cni/net.d"
conf_template = ""
ip_pref = ""
max_conf_num = 1
[plugins."io.containerd.grpc.v1.cri".containerd]
default_runtime_name = "runc"
disable_snapshot_annotations = true
discard_unpacked_layers = false
ignore_rdt_not_enabled_errors = false
no_pivot = false
snapshotter = "overlayfs"
[plugins."io.containerd.grpc.v1.cri".containerd.default_runtime]
base_runtime_spec = ""
cni_conf_dir = ""
cni_max_conf_num = 0
container_annotations = []
pod_annotations = []
privileged_without_host_devices = false
runtime_engine = ""
runtime_path = ""
runtime_root = ""
runtime_type = ""
[plugins."io.containerd.grpc.v1.cri".containerd.default_runtime.options]
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes]
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
base_runtime_spec = ""
cni_conf_dir = ""
cni_max_conf_num = 0
container_annotations = []
pod_annotations = []
privileged_without_host_devices = false
runtime_engine = ""
runtime_path = ""
runtime_root = ""
runtime_type = "io.containerd.runc.v2"
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
BinaryName = ""
CriuImagePath = ""
CriuPath = ""
CriuWorkPath = ""
IoGid = 0
IoUid = 0
NoNewKeyring = false
NoPivotRoot = false
Root = ""
ShimCgroup = ""
SystemdCgroup = true
[plugins."io.containerd.grpc.v1.cri".containerd.untrusted_workload_runtime]
base_runtime_spec = ""
cni_conf_dir = ""
cni_max_conf_num = 0
container_annotations = []
pod_annotations = []
privileged_without_host_devices = false
runtime_engine = ""
runtime_path = ""
runtime_root = ""
runtime_type = ""
[plugins."io.containerd.grpc.v1.cri".containerd.untrusted_workload_runtime.options]
[plugins."io.containerd.grpc.v1.cri".image_decryption]
key_model = "node"
[plugins."io.containerd.grpc.v1.cri".registry]
config_path = ""
[plugins."io.containerd.grpc.v1.cri".registry.auths]
[plugins."io.containerd.grpc.v1.cri".registry.configs]
[plugins."io.containerd.grpc.v1.cri".registry.headers]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
endpoint = ["https://docker.mirrors.ustc.edu.cn", "http://hub-mirror.c.163.com"]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."gcr.io"]
endpoint = ["https://gcr.mirrors.ustc.edu.cn"]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."k8s.gcr.io"]
endpoint = ["https://gcr.mirrors.ustc.edu.cn/google-containers/"]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."quay.io"]
endpoint = ["https://quay.mirrors.ustc.edu.cn"]
[plugins."io.containerd.grpc.v1.cri".x509_key_pair_streaming]
tls_cert_file = ""
tls_key_file = ""
[plugins."io.containerd.internal.v1.opt"]
path = "/opt/containerd"
[plugins."io.containerd.internal.v1.restart"]
interval = "10s"
[plugins."io.containerd.internal.v1.tracing"]
sampling_ratio = 1.0
service_name = "containerd"
[plugins."io.containerd.metadata.v1.bolt"]
content_sharing_policy = "shared"
[plugins."io.containerd.monitor.v1.cgroups"]
no_prometheus = false
[plugins."io.containerd.runtime.v1.linux"]
no_shim = false
runtime = "runc"
runtime_root = ""
shim = "containerd-shim"
shim_debug = false
[plugins."io.containerd.runtime.v2.task"]
platforms = ["linux/amd64"]
sched_core = false
[plugins."io.containerd.service.v1.diff-service"]
default = ["walking"]
[plugins."io.containerd.service.v1.tasks-service"]
rdt_config_file = ""
[plugins."io.containerd.snapshotter.v1.aufs"]
root_path = ""
[plugins."io.containerd.snapshotter.v1.btrfs"]
root_path = ""
[plugins."io.containerd.snapshotter.v1.devmapper"]
async_remove = false
base_image_size = ""
discard_blocks = false
fs_options = ""
fs_type = ""
pool_name = ""
root_path = ""
[plugins."io.containerd.snapshotter.v1.native"]
root_path = ""
[plugins."io.containerd.snapshotter.v1.overlayfs"]
root_path = ""
upperdir_label = false
[plugins."io.containerd.snapshotter.v1.zfs"]
root_path = ""
[plugins."io.containerd.tracing.processor.v1.otlp"]
endpoint = ""
insecure = false
protocol = ""
[proxy_plugins]
[stream_processors]
[stream_processors."io.containerd.ocicrypt.decoder.v1.tar"]
accepts = ["application/vnd.oci.image.layer.v1.tar+encrypted"]
args = ["--decryption-keys-path", "/etc/containerd/ocicrypt/keys"]
env = ["OCICRYPT_KEYPROVIDER_CONFIG=/etc/containerd/ocicrypt/ocicrypt_keyprovider.conf"]
path = "ctd-decoder"
returns = "application/vnd.oci.image.layer.v1.tar"
[stream_processors."io.containerd.ocicrypt.decoder.v1.tar.gzip"]
accepts = ["application/vnd.oci.image.layer.v1.tar+gzip+encrypted"]
args = ["--decryption-keys-path", "/etc/containerd/ocicrypt/keys"]
env = ["OCICRYPT_KEYPROVIDER_CONFIG=/etc/containerd/ocicrypt/ocicrypt_keyprovider.conf"]
path = "ctd-decoder"
returns = "application/vnd.oci.image.layer.v1.tar+gzip"
[timeouts]
"io.containerd.timeout.bolt.open" = "0s"
"io.containerd.timeout.shim.cleanup" = "5s"
"io.containerd.timeout.shim.load" = "5s"
"io.containerd.timeout.shim.shutdown" = "3s"
"io.containerd.timeout.task.state" = "2s"
[ttrpc]
address = ""
gid = 0
uid = 0
EOF
systemctl daemon-reload
systemctl enable --now containerd
systemctl restart
containerd
# 验证containerd是否安装成功
crictl info
# 验证是否可以下载镜像
ctr images pull docker.io/library/redis:alpine

2.10. 部署kubelet

2.10.1. 启动kubelet

BOOTSTRAP_TOKEN=$(awk -F "," '{print $1}' /etc/kubernetes/token.csv)
kubectl config set-cluster kubernetes 
--certificate-authority=ca.pem 
--embed-certs=true 
--server=https://192.168.11.71:6443 
--kubeconfig=kubelet-bootstrap.kubeconfig
kubectl config set-credentials kubelet-bootstrap 
--token=${BOOTSTRAP_TOKEN} 
--kubeconfig=kubelet-bootstrap.kubeconfig
kubectl config set-context default 
--cluster=kubernetes 
--user=kubelet-bootstrap 
--kubeconfig=kubelet-bootstrap.kubeconfig
kubectl config use-context default 
--kubeconfig=kubelet-bootstrap.kubeconfig
kubectl create clusterrolebinding cluster-system-anonymous 
--clusterrole=cluster-admin 
--user=kubelet-bootstrap
kubectl create clusterrolebinding kubelet-bootstrap 
--clusterrole=system:node-bootstrapper 
--user=kubelet-bootstrap
kubectl describe clusterrolebinding cluster-system-anonymous
kubectl describe clusterrolebinding kubelet-bootstrap
# 创建kubelet配置文件
tee kubelet.json << 'EOF'
{
"kind": "KubeletConfiguration",
"apiVersion": "kubelet.config.k8s.io/v1beta1",
"authentication": {
"x509": {
"clientCAFile": "/etc/kubernetes/pki/ca.pem"
},
"webhook": {
"enabled": true,
"cacheTTL": "2m0s"
},
"anonymous": {
"enabled": false
}
},
"authorization": {
"mode": "Webhook",
"webhook": {
"cacheAuthorizedTTL": "5m0s",
"cacheUnauthorizedTTL": "30s"
}
},
"address": "192.168.11.71",
"port": 10250,
"readOnlyPort": 10255,
"cgroupDriver": "systemd",
"hairpinMode": "promiscuous-bridge",
"serializeImagePulls": false,
"featureGates": {
"RotateKubeletServerCertificate": true
},
"clusterDomain": "cluster.local.",
"clusterDNS": ["10.96.0.10"]
}
EOF
# 创建kubelet服务启动配置文件
tee kubelet.service << 'EOF'
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=containerd.service
Requires=containerd.service
[Service]
WorkingDirectory=/var/lib/kubelet
ExecStart=/usr/local/bin/kubelet 
--bootstrap-kubeconfig=/etc/kubernetes/kubelet-bootstrap.kubeconfig 
--cert-dir=/etc/kubernetes/pki 
--kubeconfig=/etc/kubernetes/kubelet.kubeconfig 
--config=/etc/kubernetes/kubelet.json 
--cni-bin-dir=/etc/cni/bin 
--cni-conf-dir=/etc/cni/net.d 
--container-runtime=remote 
--container-runtime-endpoint=unix:///run/containerd/containerd.sock 
--network-plugin=cni 
--rotate-certificates 
--pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.2 
--root-dir=/etc/cni/net.d 
--alsologtostderr=true 
--logtostderr=false 
--log-dir=/var/log/kubernetes 
--v=2
Restart=on-failure
RestartSec=5
[Install]
WantedBy=multi-user.target
EOF
mkdir -p /etc/kubernetes/pki
mkdir -p /etc/kubernetes/manifests/ /etc/systemd/system/kubelet.service.d /var/lib/kubelet /var/log/kubernetes
cp kubelet-bootstrap.kubeconfig /etc/kubernetes/
cp kubelet.json /etc/kubernetes/
cp kubelet.service /usr/lib/systemd/system/
systemctl daemon-reload && systemctl enable kubelet &&
systemctl start kubelet && systemctl status kubelet

2.10.2. 验证kubelet是否启动成功

kubectl get nodes -owide
kubectl get csr

执行结果，注意kubelet的启动需要一定时间，等个一两分钟再执行此命令如果还不是该结果，那么多半是配置哪里出问题了

[root@k8s-master1 work]#
[root@k8s-master1 work]# kubectl get nodes -owide
NAME
STATUS
ROLES
AGE
VERSION
INTERNAL-IP
EXTERNAL-IP
OS-IMAGE
KERNEL-VERSION
CONTAINER-RUNTIME
k8s-master1
Ready
<none>
53s
v1.21.14
192.168.11.71
<none>
CentOS Linux 7 (Core)
6.0.7-1.el7.elrepo.x86_64
containerd://1.6.10
[root@k8s-master1 work]# kubectl get csr
NAME
AGE
SIGNERNAME
REQUESTOR
CONDITION
csr-z56vc
2m12s
kubernetes.io/kube-apiserver-client-kubelet
kubelet-bootstrap
Approved,Issued
[root@k8s-master1 work]#
[root@k8s-master1 work]#

2.11. 部署kubeproxy

tee kube-proxy-csr.json << 'EOF'
{
"CN": "system:kube-proxy",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "system:kube-proxy",
"OU": "Kubernetes-manual"
}
]
}
EOF
cfssl gencert 
-ca=ca.pem 
-ca-key=ca-key.pem 
-config=ca-config.json 
-profile=kubernetes 
kube-proxy-csr.json | cfssljson -bare kube-proxy
kubectl config set-cluster kubernetes

--certificate-authority=ca.pem

--embed-certs=true

--server=https://192.168.11.71:6443

--kubeconfig=kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy

--client-certificate=kube-proxy.pem

--client-key=kube-proxy-key.pem

--embed-certs=true

--kubeconfig=kube-proxy.kubeconfig
kubectl config set-context default

--cluster=kubernetes

--user=kube-proxy

--kubeconfig=kube-proxy.kubeconfig
kubectl config use-context default 
--kubeconfig=kube-proxy.kubeconfig
tee kube-proxy.yaml << 'EOF'
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 192.168.11.71
clientConnection:
kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig
clusterCIDR: 172.16.0.0/12
healthzBindAddress: 192.168.11.71:10256
kind: KubeProxyConfiguration
metricsBindAddress: 192.168.11.71:10249
mode: "ipvs"
EOF
tee kube-proxy.service << 'EOF'
[Unit]
Description=Kubernetes Kube-Proxy Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target
[Service]
WorkingDirectory=/var/lib/kube-proxy
ExecStart=/usr/local/bin/kube-proxy 
--config=/etc/kubernetes/kube-proxy.yaml 
--alsologtostderr=true 
--logtostderr=false 
--log-dir=/var/log/kubernetes 
--v=2
Restart=on-failure
RestartSec=5
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
EOF
mkdir -p /var/lib/kube-proxy
cp kube-proxy*.pem /etc/kubernetes/pki/
cp kube-proxy.kubeconfig kube-proxy.yaml /etc/kubernetes/
cp kube-proxy.service /usr/lib/systemd/system/
systemctl daemon-reload && systemctl enable kube-proxy && systemctl restart kube-proxy && systemctl status kube-proxy

2.12. 部署网络组件calico

网友反映说 centos7 要升级libseccomp 不然 无法安装calico

wget https://docs.projectcalico.org/v3.19/manifests/calico.yaml
sed -i 's/# - name: CALICO_IPV4POOL_CIDR/- name: CALICO_IPV4POOL_CIDR/g' calico.yaml
sed -i 's/#
value: "192.168.0.0/16"/
value: "172.16.0.0/12"/g' calico.yaml
sed -i 's/"type": "calico-ipam"/"type": "calico-ipam",n
"assign_ipv4": "true"/g' calico.yaml
#创建calico组件
kubectl apply -f calico.yaml
#查看calico pod是否成功创建
kubectl get pods -n kube-system -owide

执行过程

[root@k8s-master1 work]#
[root@k8s-master1 work]#
[root@k8s-master1 work]# kubectl apply -f calico.yaml
configmap/calico-config created
customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/kubecontrollersconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networksets.crd.projectcalico.org created
clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrole.rbac.authorization.k8s.io/calico-node created
clusterrolebinding.rbac.authorization.k8s.io/calico-node created
daemonset.apps/calico-node created
serviceaccount/calico-node created
deployment.apps/calico-kube-controllers created
serviceaccount/calico-kube-controllers created
Warning: policy/v1beta1 PodDisruptionBudget is deprecated in v1.21+, unavailable in v1.25+; use policy/v1 PodDisruptionBudget
poddisruptionbudget.policy/calico-kube-controllers created
[root@k8s-master1 work]#
[root@k8s-master1 work]#
[root@k8s-master1 work]#
[root@k8s-master1 work]#
[root@k8s-master1 work]#
[root@k8s-master1 work]#
[root@k8s-master1 work]# kubectl get pods -n kube-system -owide
NAME
READY
STATUS
RESTARTS
AGE
IP
NODE
NOMINATED NODE
READINESS GATES
calico-kube-controllers-7cc8dd57d9-dpcqw
1/1
Running
0
3m16s
10.88.0.2
k8s-node1
<none>
<none>
calico-node-hr9f5
1/1
Running
0
3m15s
192.168.11.74
k8s-node1
<none>
<none>
[root@k8s-master1 work]#

2.13. 部署CoreDNS

tee coredns.yaml
<< 'EOF'
apiVersion: v1
kind: ServiceAccount
metadata:
name: coredns
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:coredns
rules:
- apiGroups:
- ""
resources:
- endpoints
- services
- pods
- namespaces
verbs:
- list
- watch
- apiGroups:
- discovery.k8s.io
resources:
- endpointslices
verbs:
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
annotations:
rbac.authorization.kubernetes.io/autoupdate: "true"
labels:
kubernetes.io/bootstrapping: rbac-defaults
name: system:coredns
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:coredns
subjects:
- kind: ServiceAccount
name: coredns
namespace: kube-system
---
apiVersion: v1
kind: ConfigMap
metadata:
name: coredns
namespace: kube-system
data:
Corefile: |
.:53 {
errors
health {
lameduck 5s
}
ready
kubernetes cluster.local in-addr.arpa ip6.arpa {
fallthrough in-addr.arpa ip6.arpa
}
prometheus :9153
forward . /etc/resolv.conf {
max_concurrent 1000
}
cache 30
loop
reload
loadbalance
}
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: coredns
namespace: kube-system
labels:
k8s-app: kube-dns
kubernetes.io/name: "CoreDNS"
spec:
# replicas: not specified here:
# 1. Default is 1.
# 2. Will be tuned in real time if DNS horizontal auto-scaling is turned on.
strategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
selector:
matchLabels:
k8s-app: kube-dns
template:
metadata:
labels:
k8s-app: kube-dns
spec:
priorityClassName: system-cluster-critical
serviceAccountName: coredns
tolerations:
- key: "CriticalAddonsOnly"
operator: "Exists"
nodeSelector:
kubernetes.io/os: linux
affinity:
podAntiAffinity:
preferredDuringSchedulingIgnoredDuringExecution:
- weight: 100
podAffinityTerm:
labelSelector:
matchExpressions:
- key: k8s-app
operator: In
values: ["kube-dns"]
topologyKey: kubernetes.io/hostname
containers:
- name: coredns
image: registry.cn-beijing.aliyuncs.com/dotbalo/coredns:1.8.6
imagePullPolicy: IfNotPresent
resources:
limits:
memory: 170Mi
requests:
cpu: 100m
memory: 70Mi
args: [ "-conf", "/etc/coredns/Corefile" ]
volumeMounts:
- name: config-volume
mountPath: /etc/coredns
readOnly: true
ports:
- containerPort: 53
name: dns
protocol: UDP
- containerPort: 53
name: dns-tcp
protocol: TCP
- containerPort: 9153
name: metrics
protocol: TCP
securityContext:
allowPrivilegeEscalation: false
capabilities:
add:
- NET_BIND_SERVICE
drop:
- all
readOnlyRootFilesystem: true
livenessProbe:
httpGet:
path: /health
port: 8080
scheme: HTTP
initialDelaySeconds: 60
timeoutSeconds: 5
successThreshold: 1
failureThreshold: 5
readinessProbe:
httpGet:
path: /ready
port: 8181
scheme: HTTP
dnsPolicy: Default
volumes:
- name: config-volume
configMap:
name: coredns
items:
- key: Corefile
path: Corefile
---
apiVersion: v1
kind: Service
metadata:
name: kube-dns
namespace: kube-system
annotations:
prometheus.io/port: "9153"
prometheus.io/scrape: "true"
labels:
k8s-app: kube-dns
kubernetes.io/cluster-service: "true"
kubernetes.io/name: "CoreDNS"
spec:
selector:
k8s-app: kube-dns
clusterIP: 10.96.0.10
ports:
- name: dns
port: 53
protocol: UDP
- name: dns-tcp
port: 53
protocol: TCP
- name: metrics
port: 9153
protocol: TCP
EOF
kubectl apply -f coredns.yaml

2.14. 安装Metric Server

tee metrics-server.yaml << 'EOF'
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: metrics-server
rbac.authorization.k8s.io/aggregate-to-admin: "true"
rbac.authorization.k8s.io/aggregate-to-edit: "true"
rbac.authorization.k8s.io/aggregate-to-view: "true"
name: system:aggregated-metrics-reader
rules:
- apiGroups:
- metrics.k8s.io
resources:
- pods
- nodes
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
labels:
k8s-app: metrics-server
name: system:metrics-server
rules:
- apiGroups:
- ""
resources:
- pods
- nodes
- nodes/stats
- namespaces
- configmaps
verbs:
- get
- list
- watch
---
apiVersion: rbac.authorization.k8s.io/v1
kind: RoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server-auth-reader
namespace: kube-system
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: Role
name: extension-apiserver-authentication-reader
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: metrics-server:system:auth-delegator
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:auth-delegator
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
labels:
k8s-app: metrics-server
name: system:metrics-server
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:metrics-server
subjects:
- kind: ServiceAccount
name: metrics-server
namespace: kube-system
---
apiVersion: v1
kind: Service
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
spec:
ports:
- name: https
port: 443
protocol: TCP
targetPort: https
selector:
k8s-app: metrics-server
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
k8s-app: metrics-server
name: metrics-server
namespace: kube-system
spec:
selector:
matchLabels:
k8s-app: metrics-server
strategy:
rollingUpdate:
maxUnavailable: 0
template:
metadata:
labels:
k8s-app: metrics-server
spec:
containers:
- args:
- --cert-dir=/tmp
- --secure-port=4443
- --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
- --kubelet-use-node-status-port
- --metric-resolution=15s
- --kubelet-insecure-tls
- --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.pem # change to front-proxy-ca.crt for kubeadm
- --requestheader-username-headers=X-Remote-User
- --requestheader-group-headers=X-Remote-Group
- --requestheader-extra-headers-prefix=X-Remote-Extra-
image: registry.cn-beijing.aliyuncs.com/dotbalo/metrics-server:0.5.0
imagePullPolicy: IfNotPresent
livenessProbe:
failureThreshold: 3
httpGet:
path: /livez
port: https
scheme: HTTPS
periodSeconds: 10
name: metrics-server
ports:
- containerPort: 4443
name: https
protocol: TCP
readinessProbe:
failureThreshold: 3
httpGet:
path: /readyz
port: https
scheme: HTTPS
initialDelaySeconds: 20
periodSeconds: 10
resources:
requests:
cpu: 100m
memory: 200Mi
securityContext:
readOnlyRootFilesystem: true
runAsNonRoot: true
runAsUser: 1000
volumeMounts:
- mountPath: /tmp
name: tmp-dir
- name: ca-ssl
mountPath: /etc/kubernetes/pki
nodeSelector:
kubernetes.io/os: linux
priorityClassName: system-cluster-critical
serviceAccountName: metrics-server
volumes:
- emptyDir: {}
name: tmp-dir
- name: ca-ssl
hostPath:
path: /etc/kubernetes/pki
---
apiVersion: apiregistration.k8s.io/v1
kind: APIService
metadata:
labels:
k8s-app: metrics-server
name: v1beta1.metrics.k8s.io
spec:
group: metrics.k8s.io
groupPriorityMinimum: 100
insecureSkipTLSVerify: true
service:
name: metrics-server
namespace: kube-system
version: v1beta1
versionPriority: 100
EOF
kubectl
apply -f metrics-server.yaml

2.15. 集群验证

tee pod.yaml << 'EOF'
apiVersion: v1
kind: Pod
metadata:
name: busybox
namespace: default
spec:
containers:
- name: busybox
image: docker.io/library/busybox:1.28
command:
- sleep
- "3600"
imagePullPolicy: IfNotPresent
restartPolicy: Always
EOF
kubectl apply -f pod.yaml
# 查看
kubectl
get pod
#NAME
READY
STATUS
RESTARTS
AGE
#busybox
1/1
Running
0
17s

2.16. 用pod解析默认命名空间中的kubernetes

kubectl get svc
#NAME
TYPE
CLUSTER-IP
EXTERNAL-IP
PORT(S)
AGE
#kubernetes
ClusterIP
10.96.0.1
<none>
443/TCP
17h
kubectl exec
busybox -n default -- nslookup kubernetes
#3Server:
10.96.0.10
#Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
#Name:
kubernetes
#Address 1: 10.96.0.1 kubernetes.default.svc.cluster.local

2.16.1. 测试跨命名空间是否可以解析

kubectl exec
busybox -n default -- nslookup kube-dns.kube-system
#Server:
10.96.0.10
#Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local
#Name:
kube-dns.kube-system
#Address 1: 10.96.0.10 kube-dns.kube-system.svc.cluster.local

2.16.2. 每个节点都必须要能访问Kubernetes的kubernetes svc 443和kube-dns的service 53

telnet 10.96.0.1 443
Trying 10.96.0.1...
Connected to 10.96.0.1.
Escape character is '^]'.
telnet 10.96.0.10 53
Trying 10.96.0.10...
Connected to 10.96.0.10.
Escape character is '^]'.
curl 10.96.0.10:53
curl: (52) Empty reply from server

2.16.3. Pod和Pod之前要能通

kubectl get po -owide
NAME
READY
STATUS
RESTARTS
AGE
IP
NODE
NOMINATED NODE
READINESS GATES
busybox
1/1
Running
0
17m
172.27.14.193
k8s-node02
<none>
<none>
kubectl get po -n kube-system -owide
NAME
READY
STATUS
RESTARTS
AGE
IP
NODE
NOMINATED NODE
READINESS GATES
calico-kube-controllers-5dffd5886b-4blh6
1/1
Running
0
77m
172.25.244.193
k8s-master01
<none>
<none>
calico-node-fvbdq
1/1
Running
1 (75m ago)
77m
192.168.1.61
k8s-master01
<none>
<none>
calico-node-g8nqd
1/1
Running
0
77m
192.168.1.64
k8s-node01
<none>
<none>
calico-node-mdps8
1/1
Running
0
77m
192.168.1.65
k8s-node02
<none>
<none>
calico-node-nf4nt
1/1
Running
0
77m
192.168.1.63
k8s-master03
<none>
<none>
calico-node-sq2ml
1/1
Running
0
77m
192.168.1.62
k8s-master02
<none>
<none>
calico-typha-8445487f56-mg6p8
1/1
Running
0
77m
192.168.1.65
k8s-node02
<none>
<none>
calico-typha-8445487f56-pxbpj
1/1
Running
0
77m
192.168.1.61
k8s-master01
<none>
<none>
calico-typha-8445487f56-tnssl
1/1
Running
0
77m
192.168.1.64
k8s-node01
<none>
<none>
coredns-5db5696c7-67h79
1/1
Running
0
63m
172.25.92.65
k8s-master02
<none>
<none>
metrics-server-6bf7dcd649-5fhrw
1/1
Running
0
61m
172.18.195.1
k8s-master03
<none>
<none>
# 进入busybox ping其他节点上的pod
kubectl exec -ti busybox -- sh
/ # ping 192.168.1.64
PING 192.168.1.64 (192.168.1.64): 56 data bytes
64 bytes from 192.168.1.64: seq=0 ttl=63 time=0.358 ms
64 bytes from 192.168.1.64: seq=1 ttl=63 time=0.668 ms
64 bytes from 192.168.1.64: seq=2 ttl=63 time=0.637 ms
64 bytes from 192.168.1.64: seq=3 ttl=63 time=0.624 ms
64 bytes from 192.168.1.64: seq=4 ttl=63 time=0.907 ms
# 可以连通证明这个pod是可以跨命名空间和跨主机通信的

2.16.4. 创建三个副本，可以看到3个副本分布在不同的节点

cat > deployments.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
labels:
app: nginx
spec:
replicas: 3
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: docker.io/library/nginx:1.14.2
ports:
- containerPort: 80
EOF
kubectl
apply -f deployments.yaml
deployment.apps/nginx-deployment created
kubectl
get pod
NAME
READY
STATUS
RESTARTS
AGE
busybox
1/1
Running
0
6m25s
nginx-deployment-9456bbbf9-4bmvk
1/1
Running
0
8s
nginx-deployment-9456bbbf9-9rcdk
1/1
Running
0
8s
nginx-deployment-9456bbbf9-dqv8s
1/1
Running
0
8s
# 删除nginx
kubectl delete -f deployments.yaml

最后

以上就是犹豫水杯为你收集整理的Kubernetes v1.21.14二进制搭建单节点集群1. 集群环境准备2. 集群部署的全部内容，希望文章能够帮你解决Kubernetes v1.21.14二进制搭建单节点集群1. 集群环境准备2. 集群部署所遇到的程序开发问题。

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