Openstack高可用之基础环境配置
一、操作系统配置1.1、准备：
两个节点ha-node1和ha-node2均按照centos7.0系统192.168.8.51 ha-node1
192.168.8.52 ha-node2修改主机名：
节点1# hostnamectl set-hostname ha-node1
# su -l节点2# hostnamectl set-hostname ha-node2
# su -l1.2、关闭防火墙（每个节点都需执行）# setenforce 0
# sed -i.bak "s/SELINUX=enforcing/SELINUX=permissive/g" /etc/selinux/config
# systemctl disable firewalld.service
# systemctl stop firewalld.service1.3、配置hosts文件echo '192.168.8.51 ha-node1 ' >>/etc/hosts
echo '192.168.8.52 ha-node2 ' >>/etc/hosts1.4、配置ntp（10.139.41.128为ntp服务器）每个节点都需执行# chkconfig chronyd off
# chkconfig ntpd on
# sed -i "/^server\ 3.centos.pool/a server\ 10.239.41.128 " /etc/ntp.conf
# service ntpd start
# ntpq -p二、安装集群软件
2.1、安装相关软件包# yum install -y pacemaker pcs psmisc policycoreutils-python启动pcs服务并保持开机启动# systemctl start pcsd.service
# systemctl enable pcsd.service2.2修改用户hacluster的密码# ssh ha-node2 'echo redhat1 | passwd --stdin hacluster'
# echo redhat1 | passwd --stdin hacluster注意：redhat1为hacluster用户密码
三、启动集群软件
3.1、认证各个节点，并创建集群（注意如果有代理记得取消）# pcs cluster auth ha-node1 ha-node2
# pcs cluster setup --name mycluster ha-node1 ha-node23.2、启动集群# pcs cluster start --all
ha-node1: Starting Cluster...
ha-node2: Starting Cluster...3.3、验证corosync的安装# corosync-cfgtool -s
Printing ring status.
Local node ID 1
RING ID 0
id = 192.168.8.51
status = ring 0 active with no faults3.4、查看接入成员#corosync-cmapctl | grep members
runtime.totem.pg.mrp.srp.members.1.config_version (u64) = 0
runtime.totem.pg.mrp.srp.members.1.ip (str) = r(0) ip(192.168.8.51)
runtime.totem.pg.mrp.srp.members.1.join_count (u32) = 1
runtime.totem.pg.mrp.srp.members.1.status (str) = joined
runtime.totem.pg.mrp.srp.members.2.config_version (u64) = 0
runtime.totem.pg.mrp.srp.members.2.ip (str) = r(0) ip(192.168.8.52)
runtime.totem.pg.mrp.srp.members.2.join_count (u32) = 2
runtime.totem.pg.mrp.srp.members.2.status (str) = joined3.5、corosync状态# pcs status corosync
Membership information
--------------------------
Nodeid Votes Name
1 1 ha-node1(local)
2 1 ha-node23.6、检查pacemaker的安装# ps axf
PID TTY STAT TIME COMMAND
2 ? S 0:00
...lots of processes...
1362 ? Ssl 0:35 corosync
1379 ? Ss 0:00 /usr/sbin/pacemakerd -f
1380 ? Ss 0:00 \_ /usr/libexec/pacemaker/cib
1381 ? Ss 0:00 \_ /usr/libexec/pacemaker/stonithd
1382 ? Ss 0:00 \_ /usr/libexec/pacemaker/lrmd
1383 ? Ss 0:00 \_ /usr/libexec/pacemaker/attrd
1384 ? Ss 0:00 \_ /usr/libexec/pacemaker/pengine
1385 ? Ss 0:00 \_ /usr/libexec/pacemaker/crmd3.7、检查pcs status# pcs status
Cluster name: mycluster
WARNING: no stonith devices and stonith-enabled is not false
Last updated: Tue Dec 16 16:15:29 2014
Last change: Tue Dec 16 15:49:47 2014
Stack: corosync
Current DC: ha-node2 (2) - partition with quorum
Version: 1.1.12-a14efad
2 Nodes configured
0 Resources configured
Online: [ ha-node1 ha-node2 ]
Full list of resources:
PCSD Status:
ha-node1: Online
ha-node2: Online
Daemon Status:
corosync: active/disabled
pacemaker: active/disabled
pcsd: active/enabled3.8、查看系统中error（stonith除外）# journalctl | grep -i error四、配置集群（任选一个节点）
4.1集群属性
投票属性# pcs property set no-quorum-policy=ignore集群故障时候服务迁移# pcs resource defaults migration-threshold=1由于两个节点无stonith设备# pcs property set stonith-enabled=false在node1恢复后，为防止node2资源迁回node01（迁来迁去对还是会对业务有一定影响）# pcs resource defaults resource-stickiness=100
# pcs resource defaults设置资源超时时间# pcs resource op defaults timeout=90s
# pcs resource op defaults
# pcs property set pe-warn-series-max=1000 \
pe-input-series-max=1000 \
pe-error-series-max=1000 \
cluster-recheck-interval=5min验证，正常无回显# crm_verify -L -V4.2配置浮动IP# pcs resource create vip ocf:heartbeat:IPaddr2 ip=192.168.8.53 cidr_netmask=24 op monitor interval=30svip为自定义的一个集群IP的名称，监控时间为30S。
五、群集操作命令
5.1、验证群集安装# pacemakerd -F ## 查看pacemaker组件，ps axf | grep pacemaker
# corosync-cfgtool -s ## 查看corosync序号
# corosync-cmapctl | grep members ## corosync 2.3.x
# corosync-objctl | grep members ## corosync 1.4.x5.2、查看群集资源# pcs resource standards ## 查看支持资源类型
# pcs resource providers ## 查看资源提供商
# pcs resource agents ## 查看所有资源代理
# pcs resource list ## 查看支持资源列表
# pcs stonith list ## 查看支持Fence列表
# pcs property list --all ## 显示群集默认变量参数
# crm_simulate -sL ## 检验资源 score 值5.3、使用群集脚本 # pcs cluster cib ra_cfg ## 将群集资源配置信息保存在指定文件
# pcs -f ra_cfg resource create ## 创建群集资源并保存在指定文件中（而非保存在运行配置）
# pcs -f ra_cfg resource show ## 显示指定文件的配置信息，检查无误后
# pcs cluster cib-push ra_cfg ## 将指定配置文件加载到运行配置中5.4、STONITH 设备操作# stonith_admin -I ## 查询fence设备
# stonith_admin -M -a agent_name ## 查询fence设备的元数据，stonith_admin -M -a fence_vmware_soap
# stonith_admin --reboot nodename ## 测试 STONITH 设备5.5、查看群集配置# crm_verify -L -V ## 检查配置有无错误
# pcs property ## 查看群集属性
# pcs stonith ## 查看stonith
# pcs constraint ## 查看资源约束
# pcs config ## 查看群集资源配置
# pcs cluster cib ## 以XML格式显示群集配置5.6、管理群集# pcs status ## 查看群集状态
# pcs status cluster
# pcs status corosync
# pcs cluster stop ## 停止群集
# pcs cluster start --all ## 启动群集
# pcs cluster standby node11 ## 将节点置为后备standby状态，pcs cluster unstandby node11
# pcs cluster destroy [--all] ## 删除群集，[--all]同时恢复corosync.conf文件
# pcs resource cleanup ClusterIP ## 清除指定资源的状态与错误计数
# pcs stonith cleanup vmware-fencing ## 清除Fence资源的状态与错误计数
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