一、技术介绍

Heartbeat 与Corosync 是流行的Messaging Layer （集群信息层），Pacemaker 是最流行的CRM（集群资源管理器），同时Corosync+Pacemaker 是最流行的高可用集群的套件，使用DRBD+Pacemaker+Corosync 部署OpenStack HA。

二、安装前准备

1、常规初始化操作

两个个节点都需要执行

hostnamectl set-hostname controller01

yum -y install vim lrzsz net-tools

cat >>/etc/hosts<

192.168.180.190 controller01

192.168.180.180 controller02

192.168.180.200 controller

EOF

systemctl stop firewalld.service && systemctl disable firewalld.service

sed -i ‘/^SELINUX=/s/enforcing/disabled/’ /etc/selinux/config && setenforce 0

2、配置时间同步

controller01:

yum install chrony -y

vim /etc/chrony.conf

server ntp6.aliyun.com iburst

allow 192.168.0.0/16

systemctl enable chronyd.service && systemctl restart chronyd.service

chronyc sources && chronyc -a makestep

controller02:

yum install chrony -y

vim /etc/chrony.conf

server controller01 iburst

systemctl enable chronyd.service && systemctl restart chronyd.service && chronyc sources

三、安装配置DRBD

1、安装DRBD

两个节点都要操作

rpm -ivh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm

yum install -y drbd84-utils kmod-drbd84 kernel*

重启系统

reboot

加载模块

modprobe drbd

echo drbd >/etc/modules-load.d/drbd.conf

2、配置DRBD

在controller01 上

vim /etc/drbd.conf

include “drbd.d/global_common.conf”;

include “drbd.d/*.res”;

cp /etc/drbd.d/global_common.conf{,.bak}

vim /etc/drbd.d/global_common.conf //替换为如下内容

global {

usage-count no;

udev-always-use-vnr; # treat implicit the same as explicit volumes

}

common {

protocol C;

handlers {

pri-on-incon-degr “/usr/lib/drbd/notify-pri-on-incon-degr.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f”;

pri-lost-after-sb “/usr/lib/drbd/notify-pri-lost-after-sb.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f”;

local-io-error “/usr/lib/drbd/notify-io-error.sh; /usr/lib/drbd/notify-emergency-shutdown.sh; echo o > /proc/sysrq-trigger ; halt -f”;

}

startup {

}

options {

}

disk {

on-io-error detach;

}

net {

cram-hmac-alg “sha1”;

shared-secret “123456”;

}

}

vim /etc/drbd.d/mydrbd.res

resource mydrbd {

on controller01 {

device /dev/drbd0;

disk /dev/sdb;

address 192.168.180.190:7789;

meta-disk internal;

}

on controller02 {

device /dev/drbd0;

disk /dev/sdb;

address 192.168.180.180:7789;

meta-disk internal;

}

}

将配置好的文件复制到controller02上

scp /etc/drbd.conf controller02:/etc/

scp /etc/drbd.d/{global_common.conf,mydrbd.res} controller02:/etc/drbd.d

给虚拟机添加硬盘，两个节点都要执行，然后重启系统

创建初始化DRBD 设备元数据并创建元数据，两个节点都要执行

dd if=/dev/zero of=/dev/sdb bs=1M count=100

drbdadm create-md mydrbd

drbdadm up mydrbd

将controller01 节点设置为主节点

drbdadm – --overwrite-data-of-peer primary mydrbd

cat /proc/drbd //查看DBRD 状态

在controller01上执行

mke2fs -j /dev/drbd0

四、Corosync 安装和配置

两台机器上都执行

1. 安装Pacemaker、Corosync

   yum install -y pacemaker pcs psmisc policycoreutils-python

   systemctl start pcsd.service && systemctl enable pcsd.service

   给hacluster用户设置密码为：123456

   passwd hacluster

   pcs cluster auth controller01 controller02 //在controller01 授权集群节点

   pcs cluster setup --name openstack-HA controller01 controller02 //在controller01 设置集群名称，加入节点

   pcs cluster start --all && pcs status corosync \启动并查看状态

   2、配置Corosync

   vim /etc/corosync/corosync.conf

   totem {

   version: 2

   cluster_name: openstack-HA

   secauth: off

   transport: udpu

   }

   nodelist {

   node {

   ring0_addr: controller01

   nodeid: 1

   }

   node {

   ring0_addr: controller02

   nodeid: 2

   }

   }

   quorum {

   provider: corosync_votequorum

   two_node: 1

   }

   logging {

   to_logfile: yes

   logfile: /var/log/cluster/corosync.log

   to_syslog: yes

   }

   corosync-keygen

   cd /etc/corosync/

   scp -p authkey corosync.conf controller02:/etc/corosync/

   3、Pacemaker 配置

2. 配置集群初始属性

   pcs cluster status

   pcs property set no-quorum-policy=ignore

   pcs resource defaults migration-threshold=1

   pcs property set stonith-enabled=false

   在故障controller 恢复后，为防止备用资源迁回原有节点（迁来迁去会对业务有一定影响），建议将以下数值设置为官网推荐的默认时间。

   pcs resource defaults resource-stickiness=100 && pcs resource defaults

   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

   crm_verify -L -V

   验证如果默认没有任何输出，就说明配置正确

3. 配置集群详细属性

   执行以下命令配置VIP 和监测时间间隔，主节点上配置

   pcs resource create vip ocf💓IPaddr2 ip=192.168.180.200 cidr_netmask=24 op monitor interval=30s

   查看群集情况

   pcs property

   五、MariaDB 安装和配置

   MariaDB 安装和配置在两个节点都要执行

4. 安装MariaDB

   yum -y install mariadb mariadb-server python2-PyMySQL

5. 配置MariaDB

   vim /etc/my.cnf.d/openstack.cnf

   [mysqld]

   bind-address = 192.168.180.190

   default-storage-engine = innodb

   innodb_file_per_table = on

   max_connections = 4096

   collation-server = utf8_general_ci

   character-set-server = utf8

   在controller02 上编辑/etc/my.cnf.d/openstack.cnf,只需要将bind-address =192.168.180.190改为192.168.180.180,其他配置和192.168.180.190上保持一致。

   在两个节点上，分别启动数据库服务，并配置为开机启动。

   systemctl enable mariadb.service && systemctl start mariadb.service

   mysql_secure_installation （密码设置为123456）

   登录测试

   mysql -u root -p123456

   六、Memcache 的安装配置

   安装Memcached 服务，两个节点都需要执行

   yum install memcached python-memcached -y

   vim /etc/sysconfig/memcached

   PORT=“11211”

   USER=“memcached”

   MAXCONN=“1024”

   CACHESIZE=“64”

   OPTIONS=“-l 192.168.180.190,::1” //节点IP

   systemctl restart memcached.service && systemctl enable memcached.service

   七、RabbitMQ 安装和配置

6. 安装RabbitMQ

   两个节点上，分别完成RabbitMQ 安装和配置

   yum install centos-release-openstack-train -y

   yum install rabbitmq-server -y

   systemctl enable rabbitmq-server.service && systemctl start rabbitmq-server.service

7. 配置RabbitMQ

   使用rabbitmqctl 添加openstack 用户，并设置密码为admin

   rabbitmqctl add_user openstack admin

   给openstack 用户授予权限

   rabbitmqctl set_permissions openstack “." ".” “.*”

   RabbitMQ 自带了web 管理界面，只需要启动插件便可以使用。

   rabbitmq-plugins enable rabbitmq_management

   登录http://192.168.180.190:15672/ ，用户名（guest）、密码（guest）

   八、安装配置Keystone

   在两个节点分别执行以下操作

8. 安装Keystone

   mysql -u root -p123456 -e “CREATE DATABASE keystone;”

   mysql -u root -p123456 -e “GRANT ALL PRIVILEGES ON keystone.* TO ‘keystone’@‘controller01’ IDENTIFIED BY ‘admin’;”

   mysql -u root -p123456 -e “GRANT ALL PRIVILEGES ON keystone.* TO ‘keystone’@‘%’ IDENTIFIED BY ‘admin’;”

   yum -y install openstack-keystone python-openstackclient httpd mod_wsgi

9. 配置keystone

   在两个节点分别执行以下操作

   vim /etc/keystone/keystone.conf

   [database]

   connection = mysql+pymysql://keystone:admin@192.168.180.190/keystone //controller02 内修改为192.168.180.180

   [token]

   provider = fernet

su -s /bin/sh -c “keystone-manage db_sync” keystone

keystone-manage fernet_setup --keystone-user keystone --keystone-group keystone

keystone-manage credential_setup --keystone-user keystone --keystone-group keystone

keystone-manage bootstrap --bootstrap-password admin --bootstrap-admin-url http://controller01:5000/v3/ --bootstrap-internal-url http://controller01:5000/v3/ --bootstrap-public-url http://controller01:5000/v3/ --bootstrap-region-id RegionOne //controller02 节点注意修改命令中主机名

//controller02 节点注意修改配置文件中的主机名

vim /etc/httpd/conf/httpd.conf

ServerName controller01 //controller02 节点注意修改配置文件中的主机名

ln -s /usr/share/keystone/wsgi-keystone.conf /etc/httpd/conf.d/

systemctl enable httpd.service && systemctl start httpd.service

cat >> ~/admin-openrc << EOF

export OS_USERNAME=admin

export OS_PASSWORD=admin

export OS_PROJECT_NAME=admin

export OS_USER_DOMAIN_NAME=Default

export OS_PROJECT_DOMAIN_NAME=Default

export OS_AUTH_URL=http://controller01:5000/v3 //controller02 节点注意修改配置文件中的主机名

export OS_IDENTITY_API_VERSION=3

EOF

//controller02 节点注意修改配置文件中的主机名

chmod +x admin-openrc && . admin-openrc

env | grep OS

openstack project create --domain default --description “Service Project” service

openstack project create --domain default --description “Demo Project” demo

openstack user create --domain default --password-prompt demo //输入两次密码demo

openstack role create user

openstack role add --project demo --user demo user

执行命令重置OS_TOKEN 和OS_URL 环境变量

unset OS_TOKEN OS_URL

openstack --os-auth-url http://controller01:5000/v3 --os-project-domain-name default --os-user-domain-name default --os-project-name admin --os-username admin token issue

. admin-openrc && openstack token issue

//controller02 节点注意修改配置文件中的主机名

cat >> ~/demo-openrc << EOF

export OS_PROJECT_DOMAIN_NAME=Default

export OS_USER_DOMAIN_NAME=Default

export OS_PROJECT_NAME=demo

export OS_USERNAME=demo

export OS_PASSWORD=demo

export OS_AUTH_URL=http://controller01:5000/v3

export OS_IDENTITY_API_VERSION=3

export OS_IMAGE_API_VERSION=2

EOF

//controller02 节点注意修改配置文件中的主机名

chmod +x demo-openrc && . demo-openrc

openstack --os-auth-url http://controller01:5000/v3 --os-project-domain-name default --os-user-domain-name default --os-project-name demo --os-username demo token issue //输入demo 密码

//controller02 节点注意修改配置文件中的主机名

openstack token issue

九、安装及配置Dashboard

在两个节点上分别安装和配置Dashboard

yum -y install openstack-dashboard python-openstackclient

vim /etc/openstack-dashboard/local_settings

OPENSTACK_HOST = “controller01”

ALLOWED_HOSTS = [‘*’]

SESSION_ENGINE = ‘django.contrib.sessions.backends.cache’

CACHES = {

‘default’: {

‘BACKEND’: ‘django.core.cache.backends.memcached.MemcachedCache’,

‘LOCATION’: ‘192.168.180.190:11211’,

}

}

OPENSTACK_KEYSTONE_URL = “http://%s:5000/v3” % OPENSTACK_HOST

//启用第3 版认证API

OPENSTACK_KEYSTONE_MULTIDOMAIN_SUPPORT = True

OPENSTACK_API_VERSIONS = {

"identity“: 3,

“image”: 2,

“volume”: 2,

}

OPENSTACK_KEYSTONE_DEFAULT_DOMAIN = “default”

OPENSTACK_KEYSTONE_DEFAULT_ROLE = “user”

OPENSTACK_NEUTRON_NETWORK = {

…

‘enable_router’: False,

‘enable_quotas’: False,

‘enable_distributed_router’: False,

‘enable_ha_router’: False,

‘enable_lb’: False,

‘enable_firewall’: False,

‘enable_vpn’: False,

‘enable_fip_topology_check’: False,

}

TIME_ZONE = “Asia/Shanghai”

//两台OpenStack 节点配置相同，需要更换配置文件内的IP 地址。

scp /etc/openstack-dashboard/local_settings 192.168.180.180:/etc/openstack-dashboard/

systemctl restart httpd.service memcached.service

十、验证OpenStack

1. 验证集群状态

   pcs cluster status

2. 使用VIP 登录 http://192.168.180.200

   在弹出的认证页面分别输入域名为“default”，帐号为“admin”，密码为“admin”。

   NOT FOUND

   解决方案：

   vim /etc/httpd/conf.d/openstack-dashboard.conf

   #WSGIScriptAlias /dashboard /usr/share/openstack-dashboard/openstack_dashboard/wsgi/django.wsgi

   WSGIScriptAlias / /usr/share/openstack-dashboard/openstack_dashboard/wsgi/django.wsgi

   #Alias /dashboard/static /usr/share/openstack-dashboard/static

   Alias /static /usr/share/openstack-dashboard/static //去掉了一层dashboard 字符

3. 验证HA 切换

   pcs cluster stop controller01

   pcs cluster status（两个节点上分别查看）

   ip a

   http://192.168.180.200