Kubernetes开机脚本

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我是靠谱客的博主闪闪胡萝卜，最近开发中收集的这篇文章主要介绍Kubernetes开机脚本，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

一、脚本使用情况

1、nfs挂载；

2、检查集群服务；

二、脚本内容

#! /bin/bash
#Description: 宕机后，启动服务脚本。慎用
# init env
umask 022
PATH="/sbin:/usr/sbin:/bin:/usr/bin"
export PATH
# Get a sane screen width
[ -z "${COLUMNS:-}" ] && COLUMNS=80
[ -z "${CONSOLETYPE:-}" ] && CONSOLETYPE="`/sbin/consoletype`"
#if [ -f /etc/sysconfig/i18n -a -z "${NOLOCALE:-}" ] ; then
# . /etc/profile.d/lang.sh
#fi
# Read in our configuration
if [ -z "${BOOTUP:-}" ]; then
if [ -f /etc/sysconfig/init ]; then
. /etc/sysconfig/init
else
# This all seem confusing? Look in /etc/sysconfig/init,
# or in /usr/doc/initscripts-*/sysconfig.txt
BOOTUP=color
RES_COL=60
MOVE_TO_COL="echo -en \033[${RES_COL}G"
SETCOLOR_SUCCESS="echo -en \033[1;32m"
SETCOLOR_FAILURE="echo -en \033[1;31m"
SETCOLOR_WARNING="echo -en \033[1;33m"
SETCOLOR_NORMAL="echo -en \033[0;39m"
LOGLEVEL=1
fi
if [ "$CONSOLETYPE" = "serial" ]; then

BOOTUP=serial
MOVE_TO_COL=
SETCOLOR_SUCCESS=
SETCOLOR_FAILURE=
SETCOLOR_WARNING=
SETCOLOR_NORMAL=
fi
fi

# status
RETVAL=0

echo_success() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
echo -n $" OK "
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "r"
return 0
}
echo_failure() {
[ "$BOOTUP" = "color" ] && $MOVE_TO_COL
echo -n "["
[ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
echo -n $"FAILED"
[ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
echo -n "]"
echo -ne "r"
return 1
}

#添加启动服务

echo -e '33[31m mount nfs filesystem 33[0m'
mountnow=`df -hT|grep nfs`

if [[ $mountnow =~ "/data" || $mountnow =~ "/k8s-data" ]]
then
echo -e '33[31m nfs has mount 33[0m'
else
rpm -qa|grep nfs-utils
RETVAL=$?
if [ $RETVAL -eq 0 ]
then echo -e '33[31m nfs-utils has install 33[0m'
else yum install -y nfs-utils
fi
rpm -qa|grep rpcbind
RETVAL=$?
if [ $RETVAL -eq 0 ]
then echo -e '33[31m rpcbind has install 33[0m'
else yum install -y rpcbind
fi
#检查nfs
ps aux|grep 'nfsv4.0-svc'|grep -v 'grep'
RETVAL=$?
if [ $RETVAL -eq 0 ]
then echo -e '33[31m nfs has start 33[0m'
else
systemctl start nfs
ps aux|grep 'nfsv4.0-svc'|grep -v 'grep'
RETVAL=$?
if [ $RETVAL -eq 0 ]
then echo -e '33[31m nfs start success 33[0m'
else echo -e '33[31m nfs start fail 33[0m'
fi
fi
#检查rpcbind
ps aux|grep rpcbind|grep -v 'grep'
RETVAL=$?
if [ $RETVAL -eq 0 ]
then echo -e '33[31m rpcbind has start 33[0m'

else
ps aux|grep rpcbind|grep -v 'grep'
RETVAL=$?
if [ $RETVAL -eq 0 ]
then echo -e '33[31m rpcbind start success 33[0m'
else echo -e '33[31m rpcbind start fail 33[0m'
fi
fi
if [ -d /data ]
then
tar czvf data.tar.gz /data
rm -rf /data
mkdir /data
mount -t nfs IP:/ /data
else
mkdir /data
mount -t nfs ip:/ /data
fi
if [ -d /k8s-data ]
then
tar czvf k8s-data.tar.gz /k8s-data
rm -rf /k8s-data
mkdir /k8s-data
mount -t nfs IP:/ /k8s-data
else
mkdir /k8s-data
mount -t nfs IP:/ /k8s-data
fi
#检查挂载
mountstatus=`df -hT|grep nfs`
[[ $mountstatus =~ "/data" && $mountstatus =~ "/k8s-data" ]] && echo -e '33[31m mount nfs success 33[0m' || echo -e '33[31m mount nfs fail 33[0m'
fi
echo -e '33[31m etcd 33[0m'
systemctl status etcd|grep running

RETVAL=$?
if [ $RETVAL -eq 0 ]
then echo -e '33[31m etcd is running 33[0m'
else echo -e '33[31m etcd dead then starting 33[0m'
systemctl start etcd
ps aux|grep etcd|grep -v grep
RETVAL=$?
[ $RETVAL -eq 0 ] && echo -e '33[31m etcd start success 33[0m' || echo -e '33[31m etcd start fail! please check! 33[0m'
fi

echo -e '33[31m docker 33[0m'
systemctl status docker|grep running
RETVAL=$?
if [ $RETVAL -eq 0 ]
then echo -e '33[31m docker is running 33[0m'
else echo -e '33[31m docker dead then starting 33[0m'
systemctl start docker
systemctl status docker|grep running
RETVAL=$?
[ $RETVAL -eq 0 ] && echo -e '33[31m docker start success 33[0m' || echo -e '33[31m docker start fail! please check! 33[0m'
fi

echo -e '33[31m kubelet 33[0m'
systemctl status kubelet|grep running
RETVAL=$?
if [ $RETVAL -eq 0 ]
then echo -e '33[31m kubelet is running 33[0m'
else echo -e '33[31m kubelet dead then starting 33[0m'
systemctl start kubelet
systemctl status kubelet|grep running
RETVAL=$?
[ $RETVAL -eq 0 ] && echo -e '33[31m kubelet start success 33[0m' || echo -e '33[31m kubelet start fail! please check! 33[0m'
fi

echo -e '33[31m check node status 33[0m'
nodecheck=`kubectl get nodes`
if [[ ! -n $nodecheck ]]
then echo -e '33[31m there is node donot master,please turn to master and check node status 33[0m'
else echo -e '33[31m there is master,checking node status now 33[0m'
nodename=`kubectl get nodes|grep -v NAME|grep Ready|awk '{print $1}'`
for i in $nodename
do
echo -e $i '33[31m is Ready 33[0m'
done
nodenameno=`kubectl get nodes|grep -v NAME|grep NotReady|awk '{print $1}'`
if [[ ! -n "$nodenameno" ]]
then echo -e '33[31m All node is Ready 33[0m'
else
for i in $nodenameno
do
echo -e $i '33[31m is NotReady,checking now 33[0m'
podname=`kubectl get pods --all-namespaces -o wide|grep 192.168.83|grep $i|awk '{print $2}'`
for i in $podname
do
podstatus=`kubectl get pods --all-namespaces -o wide|grep $i|awk '{print $4}'`
if [ "$podstatus" == "Running" ]
then echo -e $i '33[31m is Running 33[0m'
else echo -e $1 '33[31m is Dead 33[0m'
fi
done
done
fi
fi