Keystone 高可靠性部署与性能测试

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
            }
        }
    ]
} 

Result

注：以创建用户为例，一个并发数(Concurrency)，包含两个 HTTPS 请求（一个为申请 token，另一个为创建用户）。此处仅给出 mysql(单点) 数据库下keystone server 的并发性能。