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[리눅스] ubuntu에 pacemaker VirtualIP(VIP) 구성하기

변군Dev 2023. 2. 7. 11:23
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ubuntu에 pacemaker vip(VirtualIP) 구성하기

테스트 환경

호스트 이름 서버 아이피 도메인 운영체제 비고
VIP 192.168.0.60 vip.cluster.local    
control1 192.168.0.51 control1.cluster.local Ubuntu 22.04 LTS  
node3 192.168.0.63 node3.cluster.local Ubuntu 22.04 LTS  

VirtualIP(VIP) 설정하기

$ pcs status        
Cluster name: hacluster
Cluster Summary:
  * Stack: corosync
  * Current DC: node3.cluster.local (version 2.1.2-ada5c3b36e2) - partition with quorum
  * Last updated: Tue Feb  7 10:42:02 2023
  * Last change:  Tue Feb  7 10:35:15 2023 by root via cibadmin on control1.cluster.local
  * 2 nodes configured
  * 0 resource instances configured

Node List:
  * Online: [ control1.cluster.local node3.cluster.local ]

Full List of Resources:
  * No resources

Daemon Status:
  corosync: active/enabled
  pacemaker: active/enabled
  pcsd: active/enabled
$ pcs resource status  
NO resources configured

Virtual IP(VIP) 생성

pcs resource create resource_id standard:provider:type|type [resource options]

pcs resource create VirtualIP ocf:heartbeat:IPaddr2 ip=192.168.0.60 cidr_netmask=24 op monitor interval=10s
pcs resource status
$ pcs resource status
  * VirtualIP   (ocf:heartbeat:IPaddr2):         Started control1.cluster.local
crm_simulate -sL
$ crm_simulate -sL
[ control1.cluster.local node3.cluster.local ]

VirtualIP       (ocf:heartbeat:IPaddr2):         Started control1.cluster.local

pcmk__native_allocate: VirtualIP allocation score on control1.cluster.local: 0
pcmk__native_allocate: VirtualIP allocation score on node3.cluster.local: 0
pcs status
$ pcs status
Cluster name: hacluster
Cluster Summary:
  * Stack: corosync
  * Current DC: node3.cluster.local (version 2.1.2-ada5c3b36e2) - partition with quorum
  * Last updated: Tue Feb  7 10:48:09 2023
  * Last change:  Tue Feb  7 10:46:52 2023 by root via cibadmin on control1.cluster.local
  * 2 nodes configured
  * 1 resource instance configured

Node List:
  * Online: [ control1.cluster.local node3.cluster.local ]

Full List of Resources:
  * VirtualIP   (ocf:heartbeat:IPaddr2):         Started control1.cluster.local

Daemon Status:
  corosync: active/enabled
  pacemaker: active/enabled
  pcsd: active/enabled
pcs cluster status
$ pcs cluster status
Cluster Status:
 Cluster Summary:
   * Stack: corosync
   * Current DC: node3.cluster.local (version 2.1.2-ada5c3b36e2) - partition with quorum
   * Last updated: Tue Feb  7 10:48:33 2023
   * Last change:  Tue Feb  7 10:46:52 2023 by root via cibadmin on control1.cluster.local
   * 2 nodes configured
   * 1 resource instance configured
 Node List:
   * Online: [ control1.cluster.local node3.cluster.local ]

PCSD Status:
  control1.cluster.local: Online
  node3.cluster.local: Online
ip addr
root@control1:~$ ip addr
...
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 08:00:27:0d:82:e9 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.51/24 brd 192.168.0.255 scope global enp0s3
       valid_lft forever preferred_lft forever
    inet 192.168.0.60/24 brd 192.168.0.255 scope global secondary enp0s3
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fe0d:82e9/64 scope link 
       valid_lft forever preferred_lft forever
...

 

페일오버(Failover) 테스트(Active-Standby)

- control1 노드(Active→Standby)

root@control1:~$ pcs status
Cluster name: hacluster
Cluster Summary:
  * Stack: corosync
  * Current DC: node3.cluster.local (version 2.1.2-ada5c3b36e2) - partition with quorum
  * Last updated: Tue Feb  7 10:49:53 2023
  * Last change:  Tue Feb  7 10:46:52 2023 by root via cibadmin on control1.cluster.local
  * 2 nodes configured
  * 1 resource instance configured

Node List:
  * Online: [ control1.cluster.local node3.cluster.local ]

Full List of Resources:
  * VirtualIP   (ocf:heartbeat:IPaddr2):         Started control1.cluster.local

Daemon Status:
  corosync: active/enabled
  pacemaker: active/enabled
  pcsd: active/enabled
root@control1:~$ pcs cluster status
Cluster Status:
 Cluster Summary:
   * Stack: corosync
   * Current DC: node3.cluster.local (version 2.1.2-ada5c3b36e2) - partition with quorum
   * Last updated: Tue Feb  7 10:49:58 2023
   * Last change:  Tue Feb  7 10:46:52 2023 by root via cibadmin on control1.cluster.local
   * 2 nodes configured
   * 1 resource instance configured
 Node List:
   * Online: [ control1.cluster.local node3.cluster.local ]

PCSD Status:
  control1.cluster.local: Online
  node3.cluster.local: Online
root@control1:~$ pcs resource status
  * VirtualIP   (ocf:heartbeat:IPaddr2):         Started control1.cluster.local
root@control1:~$ pcs cluster stop control1.cluster.local
control1.cluster.local: Stopping Cluster (pacemaker)...
control1.cluster.local: Stopping Cluster (corosync)...
root@control1:~$ pcs cluster status
Error: cluster is not currently running on this node
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- node3 노드(Standby->Active)

root@node3:~$ ip addr            
...
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 08:00:27:0b:48:03 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.63/24 brd 192.168.0.255 scope global enp0s3
       valid_lft forever preferred_lft forever
    inet 192.168.0.60/24 brd 192.168.0.255 scope global secondary enp0s3
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fe0b:4803/64 scope link 
       valid_lft forever preferred_lft forever
...

- control1 노드(Standby)

root@control1:~$ pcs cluster start control1.cluster.local
control1.cluster.local: Starting Cluster...
root@control1:~$ pcs resource status                    
  * VirtualIP   (ocf:heartbeat:IPaddr2):         Started node3.cluster.local
root@control1:~$ pcs status
Cluster name: hacluster
Cluster Summary:
  * Stack: corosync
  * Current DC: node3.cluster.local (version 2.1.2-ada5c3b36e2) - partition with quorum
  * Last updated: Tue Feb  7 11:00:07 2023
  * Last change:  Tue Feb  7 10:46:52 2023 by root via cibadmin on control1.cluster.local
  * 2 nodes configured
  * 1 resource instance configured

Node List:
  * Online: [ control1.cluster.local node3.cluster.local ]

Full List of Resources:
  * VirtualIP   (ocf:heartbeat:IPaddr2):         Started node3.cluster.local

Daemon Status:
  corosync: active/enabled
  pacemaker: active/enabled
  pcsd: active/enabled
root@control1:~$ pcs cluster status
Cluster Status:
 Cluster Summary:
   * Stack: corosync
   * Current DC: node3.cluster.local (version 2.1.2-ada5c3b36e2) - partition with quorum
   * Last updated: Tue Feb  7 11:00:26 2023
   * Last change:  Tue Feb  7 10:46:52 2023 by root via cibadmin on control1.cluster.local
   * 2 nodes configured
   * 1 resource instance configured
 Node List:
   * Online: [ control1.cluster.local node3.cluster.local ]

PCSD Status:
  control1.cluster.local: Online
  node3.cluster.local: Online
root@control1:~$ ip addr
...
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 08:00:27:0d:82:e9 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.51/24 brd 192.168.0.255 scope global enp0s3
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fe0d:82e9/64 scope link 
       valid_lft forever preferred_lft forever
...

constraint 설정

constraint 설정 값 확인

crm_simulate -sL
$ crm_simulate -sL
[ control1.cluster.local node3.cluster.local ]

VirtualIP       (ocf:heartbeat:IPaddr2):         Started node3.cluster.local

pcmk__native_allocate: VirtualIP allocation score on control1.cluster.local: 0
pcmk__native_allocate: VirtualIP allocation score on node3.cluster.local: 0
pcs constraint config
$ pcs constraint config
Location Constraints:
Ordering Constraints:
Colocation Constraints:
Ticket Constraints:

control1 노드(Standby->Active)

pcs constraint location VirtualIP prefers control1.cluster.local=200
root@control1:~$ pcs resource status                     
  * VirtualIP   (ocf:heartbeat:IPaddr2):         Started control1.cluster.local
root@control1:~$ pcs constraint config
Location Constraints:
  Resource: VirtualIP
    Enabled on:
      Node: control1.cluster.local (score:200)
Ordering Constraints:
Colocation Constraints:
Ticket Constraints:
root@control1:~$ crm_simulate -sL     
[ control1.cluster.local node3.cluster.local ]

VirtualIP       (ocf:heartbeat:IPaddr2):         Started control1.cluster.local

pcmk__native_allocate: VirtualIP allocation score on control1.cluster.local: 200
pcmk__native_allocate: VirtualIP allocation score on node3.cluster.local: 0
root@control1:~$ pcs status           
Cluster name: hacluster
Cluster Summary:
  * Stack: corosync
  * Current DC: node3.cluster.local (version 2.1.2-ada5c3b36e2) - partition with quorum
  * Last updated: Tue Feb  7 11:03:22 2023
  * Last change:  Tue Feb  7 11:02:51 2023 by root via cibadmin on control1.cluster.local
  * 2 nodes configured
  * 1 resource instance configured

Node List:
  * Online: [ control1.cluster.local node3.cluster.local ]

Full List of Resources:
  * VirtualIP   (ocf:heartbeat:IPaddr2):         Started control1.cluster.local

Daemon Status:
  corosync: active/enabled
  pacemaker: active/enabled
  pcsd: active/enabled
root@control1:~$ ip addr
...
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 08:00:27:0d:82:e9 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.51/24 brd 192.168.0.255 scope global enp0s3
       valid_lft forever preferred_lft forever
    inet 192.168.0.60/24 brd 192.168.0.255 scope global secondary enp0s3
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fe0d:82e9/64 scope link 
       valid_lft forever preferred_lft forever
...

node3 노드 (Standby)

pcs constraint location VirtualIP prefers node3.cluster.local=100
root@node3:~$ pcs constraint config
Location Constraints:
  Resource: VirtualIP
    Enabled on:
      Node: control1.cluster.local (score:200)
      Node: node3.cluster.local (score:100)
Ordering Constraints:
Colocation Constraints:
Ticket Constraints:
root@node3:~$ crm_simulate -sL
[ control1.cluster.local node3.cluster.local ]

VirtualIP       (ocf:heartbeat:IPaddr2):         Started control1.cluster.local

pcmk__native_allocate: VirtualIP allocation score on control1.cluster.local: 200
pcmk__native_allocate: VirtualIP allocation score on node3.cluster.local: 100

 

참고URL

- Pacemaker 1.1(Configuration Explained) : Pacemaker-1.1-Pacemaker_Explained-en-US.pdf

 

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