Keystone 高可靠性部署与性能测试

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我是靠谱客的博主忧心缘分，最近开发中收集的这篇文章主要介绍Keystone 高可靠性部署与性能测试，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

Goal

Keystone Region 为跨地域的 Openstack 集群提供了统一的认证和用户租户管理。目前公司在国内外部署了数十套 Openstack 集群，其中既有集群在内网，又有集群在公网；既有 Havana 集群，也有 Icehouse 集群；既有 nova-network 集群，又有 Neutron 集群，如下图：

为了集中管理，全局共享一个 Keystone Server, 因此对 Keystone Server 的安全性、兼容性以及性能，都有特殊的要求。

安全性通过 SSL 实现和防止 DDOS 实现， tempest 测试表明 Keystone 具有很高的向后兼容性，可靠性通过 Apache、Haproxy、mysqlcluster 实现（关于 openstack 整体 HA 的实现，可以参考 http://blog.csdn.net/wsfdl/article/details/41386155），如下图：

Deployment

物理主机信息

Host Name IP VIP/DNS CPU Memory
keystone01 internal_ip01 public_ip/keystone-server E5-2620(24 Processor) 64G
keystone02 internal_ip02 public_ip/keystone-server E5-2620(24 Processor) 64G

说明：若无注明，keystone01 和 keystone02 的部署与配置相同

# yum -y install mysql mysql-server MySQL-python
# yum -y install openstack-keystone python-keystoneclient
# yum -y install haproxy
# yum -y install httpd
# yum -y install keepalived
# yum -y install haproxy
# yum -y install httpd
# yum -y install keepalived

Configuration

/etc/keystone/keystone.conf

[DEFAULT]
public_endpoint=https://keystone-server/main/
admin_endpoint=https://keystone-server/admin/
[database]
connection=mysql://keystone:keystonepass@mysqlserver/keystone
max_pool_size=500
[signing]
token_format=UUID
[ssl]
cert_subject=/C=US/ST=Unset/L=Unset/O=Unset/CN=keystone-server
[token]
provider=keystone.token.providers.uuid.Provider

/etc/httpd/conf.d/wsgi-keystone.conf

NameVirtualHost *:5000
 Listen internal_ip0x:5000
 <VirtualHost *:5000>
 ServerName keystone-main
 WSGIScriptAlias /main  /var/www/cgi-bin/keystone/main
 ErrorLog /var/log/keystone/apache2-main-error.log
 LogLevel debug
 CustomLog /var/log/keystone/apache2-main-access.log common
 </VirtualHost>
  
 NameVirtualHost *:35357
 Listen internal_ip0x:35357
 <VirtualHost *:35357>
 ServerName keystone-admin
 WSGIScriptAlias /admin  /var/www/cgi-bin/keystone/admin
 ErrorLog /var/log/keystone/apache2-admin-error.log
 LogLevel debug
 CustomLog /var/log/keystone/apache2-admin-access.log common
 </VirtualHost>

/etc/haproxy/haproxy.cfg

global

daemon
log 127.0.0.1 local3

defaults
maxconn 4000
log global
timeout server 10s
timeout connect 10s
timeout client 10s
mode http
option forwardfor
option http-server-close
log global

listen stats
mode http
bind public_ip:8000
stats enable
stats hide-version
stats uri /
stats realm Haproxy Statistics
stats auth lecloud:openstack
stats admin if TRUE

frontend keystone_frontend
bind public_ip:443 ssl crt /etc/haproxy/keystone_https.pem
reqadd X-Forwarded-Proto: https
acl admin_path path_beg /admin
acl main_path path_beg /main
use_backend admin_backend if admin_path
use_backend main_backend if main_path

backend admin_backend
balance roundrobin
redirect scheme https if !{ ssl_fc }
server keystone-server-01 internal_ip01:35357 check inter 10s
server keystone-server-02 internal_ip02:35357 check inter 10s

backend main_backend
balance roundrobin
redirect scheme https if !{ ssl_fc }
server keystone-server-01 internal_ip01:5000 check inter 10s
server keystone-server-02 internal_ip02:5000 check inter 10s

/etc/keepalived/keepalived.conf

vrrp_script haproxy-check {
script "killall -0 haproxy"
interval 2
weight 10
}

vrrp_instance openstack-vip {
state MASTER # 注：keystone01 为 MASTER, keystone02 为 BACKUP
priority 102
interface eth0
virtual_router_id 108
advert_int 3
virtual_ipaddress {
public_ip
}
track_script {
haproxy-check
}
}

# mkdir /var/www/cgi-bin/keystone/
# cp /usr/share/keystone/keystone.wsgi /var/www/cgi-bin/keystone/
# ln -s /var/www/cgi-bin/keystone/keystone.wsgi /var/www/cgi-bin/keystone/admin
# ln -s /var/www/cgi-bin/keystone/keystone.wsgi /var/www/cgi-bin/keystone/main
# service httpd start
# chkconfig httpd on
# keystone-manage ssl_setup --keystone-user keystone --keystone-group keystone 注：keystone01
# cat /etc/keystone/ssl/certs/keystone.pem /etc/keystone/ssl/private/keystonekey.pem > /etc/haproxy/keystone_https.pem 注：keystone01，同时把 keystone_https.pem 拷贝至 keystone02 /etc/haproxy/ 目录下

# (crontab -l -u keystone 2>&1 | grep -q token_flush) || echo '@dayly /usr/bin/keystone-manage token_flush >/var/log/keystone/keystone-tokenflush.log 2>&1' >> /var/spool/cron/keystone
# echo "net.ipv4.ip_nonlocal_bind = 1" >> /etc/sysctl.conf
# sysctl -p
# service haproxy start
# chkconfig haproxy on
# service keepalived start
# chkconfig keepalived on

Benchmark

Configure Rally

关于 Rally，详情请参见 Openstack 性能测试 http://blog.csdn.net/wsfdl/article/details/41654373

# git clone https://git.openstack.org/stackforge/rally && cd rally
# ./rally/install_rally.sh -v
# source /opt/rally/bin/activate
# rally deployment create --filename=existing.json --name=existing
# rally -v task start create-user.json

(rally)[root@controller rally]# cat existing.json
{
    "type": "ExistingCloud",
    "auth_url": "https://keystone-server/admin/v2.0",
    "admin": {
        "username": "test",
        "password": "test",
        "tenant_name": "test"
    }
}

create-user.json

{
    "KeystoneBasic.create_user": [
        {
            "args": {
                "name_length": 10
            },
            "runner": {
                "type": "constant",
                "times": 10000,
                "concurrency": 900
            }
        }
    ]
}