HA Linux教学课件.ppt

LVS Heartbeat HA Cluster rip2, ospf vrrp: 1 master, n backup ipvs HA ipvs, health check fall_back: rip, vip Health check ifconfig, ip addr LSB: start|stop|restart|status Linux Standard Base HA MySQL vip1: Float IP mysql service Filesystem DAS HA HTTP vip2: http service File system DMA, SCSI 控制器：Controller 适配器：Adapter sda (SCSI driver), sdb, sdc 宽带 16: 15:target 窄带 8: target 7: ultraSCSI: 320MB FC 10Gbps NAS NFS file system io HA Service quorum: 法定票数 httpd HA Heartbeat UDP: 694 ha web vip httpd server File System rhel 5.8 32bit heartbeat v2 ha web node1, node2 节点名称， /etc/hosts 节点名称必须跟uname –n命令的执行结果一致 ssh互信通信 时间同步 vip: eth0: eth1: RHCS: RedHat Cluster Suite Messaging Layer heartbeat (v1, v2, v3) heartbeat v3 heartbeat, pacemaker, cluster-glue corosync cman keepalived ultramokey CRM haresource, crm (heartbeat v1/v2) pacemaker (heartbeat v3或corosync) rgmanager (cman) Drbd Dual master Options for a Primitive Resource Options for a Primitive Resource Resource Operations HA ha-aware Application Heartbeat keepalived ultramonkey Corosync(OpenAIS) API split-brain RHCS: RedHat Cluster Suite corosync + pacemaker failover domain failback RHCS qdisk: 仲裁磁盘 http, smtp, pop3 n/n n/m quorum：法定票数 ip, httpd RA restart start stop status DR LB ? HA heartbeat HA: High Availability, 3000, 600 Infrastructure 仲裁设备 qdisk ipfail HA WEB,iLo resource failover rsync+inotify sersync unison fencing node level: stonith resource level Gracious ARP Cluster Filesystem GFS2 OCFS2 vote hearbeat: 16 nodes RHCS: 100+ nodes split brain：脑裂 partitioned cluster DC: Designated Coordinator CIB: Cluster Information Base, CIB Master VIP CRM IP httpd fs NAS SAN 资源(resources)，服务容量 Split brain: 脑裂 16cpu,64G split brain： vote, quorum: 资源类型： primitive: 基本类型 group: 组 clone: (CFS) Master-Slave(同时运行于两个节点，而且有主从关系) 排列约束 active/passive active/active n/m (nm) n/n quorum RHCS: RedHat Cluster Suite, 100+ 2 nodes quorum disk heartbeat keepalived corosync/openais ultramonkey split-brain partitione