OpenStack HA 高可用组件部署

前言：
openstack中，controller节点的单点故障一直是影响整个云计算平台稳定性的重大问题，因此对controller节点的各个组件实现HA显得至关重要，由于controller节点上部署的服务组件众多，MySQL，rabbitmq，keystone，glance，nova等等，每种组件对于HA的实现都有着不同点和共同点，因此必须分开讨论，本文即时在参照之前国内一篇网文的基础之上，对其进行更新与修正，构建里一个基本的Mysql ha环境，广大爱好者可以借鉴本文的思路，最终将mysql的HA应用在两台controller节点上。

系统环境：

Ubuntu 12.04.2 LTS

节点1： 192.168.1.143（eth0）    ha1

节点2： 192.168.1.144（eth0）    ha2

Mysql virtual ip：192.168.1.10（这个稍后会用到）

以两天集群的集群环境为例，开始我们的Mysql HA部署

（1）所有节点，编辑/etc/hosts文件

vim /etc/hosts

添加以下内容

192.168.1.143  ha1

192.168.1.144  ha2

（2）安装pacemaker和corosync

apt-get install pacemaker corosync

要对corosync进行设置，将如下内容复制粘贴到所有节点的/etc/corosync/corosync.conf内：

# Please read the openais.conf.5 manual page

totem {
 version: 2

# How long before declaring a token lost (ms)
 token: 3000

# How many token retransmits before forming a new configuration
 token_retransmits_before_loss_const: 10

# How long to wait for join messages in the membership protocol (ms)
 join: 60

# How long to wait for consensus to be achieved before starting a new round of membership configuration (ms)
 consensus: 3600

# Turn off the virtual synchrony filter
 vsftype: none

# Number of messages that may be sent by one processor on receipt of the token
 max_messages: 20

# Limit generated nodeids to 31-bits (positive signed integers)
 clear_node_high_bit: yes

# Disable encryption
  secauth: off

# How many threads to use for encryption/decryption
  threads: 0

# Optionally assign a fixed node id (integer)
 # nodeid: 1234

# This specifies the mode of redundant ring, which may be none, active, or passive.
  rrp_mode: none

interface {
  # The following values need to be set based on your environment
  ringnumber: 0
  bindnetaddr: 192.168.1.0
  mcastaddr: 226.94.1.1
  mcastport: 5405
 }
}

amf {
 mode: disabled
}

service {
  # Load the Pacemaker Cluster Resource Manager
  ver:      1
  name:      pacemaker
}
quorum {
provider:corosync_votequorum
expected_votes:2
}
aisexec {
        user:  root
        group:  root
}

logging {
        fileline: off
        to_stderr: yes
        to_logfile: no
        to_syslog: yes
 syslog_facility: daemon
        debug: off
        timestamp: on
        logger_subsys {
                subsys: AMF
                debug: off
                tags: enter|leave|trace1|trace2|trace3|trace4|trace6
        }
}

更多详情见请继续阅读下一页的精彩内容：

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