104、验证Swarm数据持久性（Swarm11）

参考https://www.cnblogs.com/CloudMan6/p/8016994.html

上一节我们成功将 nfs 的volume挂载到 Service上，本节验证 Failover时，数据会不会丢失。

Scale Up

增加副本，并验证数据是否能够同步到新启动的容器上

root@host03:~# docker service update --replicas 4 my_web

my_web

overall progress: 4 out of 4 tasks

1/4: running [==================================================>]

2/4: running [==================================================>]

3/4: running [==================================================>]

4/4: running [==================================================>]

verify: Service converged

root@host03:~# docker service ps my_web

ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS

a2v73m955o9j my_web.1 httpd:latest host01 Running Running 13 minutes ago

uzdfouv3s2bz my_web.2 httpd:latest host02 Running Running 13 minutes ago

f4tg54ze3hgg my_web.3 httpd:latest host02 Running Running 14 seconds ago

znf4m0jpa0r5 my_web.4 httpd:latest host01 Running Running 14 seconds ago

root@host01:~# docker inspect my_web.4.znf4m0jpa0r5p3fklp1hgdwhu | jq .[0].Mounts

[

{

"Type": "volume",

"Name": "volume-nfs",

"Source": "/var/lib/docker/volumes/volume-nfs/_data",

"Destination": "/usr/local/apache2/htdocs",

"Driver": "local",

"Mode": "z",

"RW": true,

"Propagation": ""

}

]

root@host01:~# docker exec my_web.4.znf4m0jpa0r5p3fklp1hgdwhu cat /usr/local/apache2/htdocs/index.html

docker swarm nfs volume test

root@host02:~# docker inspect my_web.3.f4tg54ze3hggppy96jldhtdxs | jq .[0].Mounts

[

{

"Type": "volume",

"Name": "volume-nfs",

"Source": "/var/lib/docker/volumes/volume-nfs/_data",

"Destination": "/usr/local/apache2/htdocs",

"Driver": "local",

"Mode": "z",

"RW": true,

"Propagation": ""

}

]

root@host02:~# docker exec my_web.3.f4tg54ze3hggppy96jldhtdxs cat /usr/local/apache2/htdocs/index.html

docker swarm nfs volume test

更新Volume内容，并进行验证

root@host03:~# echo "add test str" >> /var/nfs/index.html

root@host03:~# cat /var/nfs/index.html

docker swarm nfs volume test

add test str

root@host03:~# curl http://10.12.31.211

docker swarm nfs volume test

add test str

root@host03:~# curl http://10.12.31.212

docker swarm nfs volume test

add test str

root@host03:~# curl http://10.12.31.213

docker swarm nfs volume test

add test str

root@host03:~# docker service ps my_web

ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS

a2v73m955o9j my_web.1 httpd:latest host01 Running Running 17 minutes ago

uzdfouv3s2bz my_web.2 httpd:latest host02 Running Running 17 minutes ago

f4tg54ze3hgg my_web.3 httpd:latest host02 Running Running 4 minutes ago

znf4m0jpa0r5 my_web.4 httpd:latest host01 Running Running 4 minutes ago

root@host01:~# docker exec my_web.1.a2v73m955o9js3fbihf0dwei6 cat /usr/local/apache2/htdocs/index.html

docker swarm nfs volume test

add test str

root@host01:~# docker exec my_web.4.znf4m0jpa0r5p3fklp1hgdwhu cat /usr/local/apache2/htdocs/index.html

docker swarm nfs volume test

add test str

root@host02:~# docker exec my_web.2.uzdfouv3s2bz0ohyahjeeyqao cat /usr/local/apache2/htdocs/index.html

docker swarm nfs volume test

add test str

root@host02:~# docker exec my_web.3.f4tg54ze3hggppy96jldhtdxs cat /usr/local/apache2/htdocs/index.html

docker swarm nfs volume test

add test str

Failover 验证，host01关机

root@host03:~# docker service ps my_web

ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS

a2v73m955o9j my_web.1 httpd:latest host01 Running Running 9 seconds ago

uzdfouv3s2bz my_web.2 httpd:latest host02 Running Running 21 minutes ago

f4tg54ze3hgg my_web.3 httpd:latest host02 Running Running 8 minutes ago

znf4m0jpa0r5 my_web.4 httpd:latest host01 Running Running 9 seconds ago

root@host03:~# docker service ps my_web

ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS

i4j8tplkkq34 my_web.1 httpd:latest host02 Ready Ready less than a second ago

a2v73m955o9j \_ my_web.1 httpd:latest host01 Shutdown Running 10 seconds ago

uzdfouv3s2bz my_web.2 httpd:latest host02 Running Running 21 minutes ago

f4tg54ze3hgg my_web.3 httpd:latest host02 Running Running 8 minutes ago

ve0j4of1m1ao my_web.4 httpd:latest host02 Ready Ready less than a second ago

znf4m0jpa0r5 \_ my_web.4 httpd:latest host01 Shutdown Running 10 seconds ago

root@host03:~# docker service ps my_web

ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS

i4j8tplkkq34 my_web.1 httpd:latest host02 Running Ready 4 seconds ago

a2v73m955o9j \_ my_web.1 httpd:latest host01 Shutdown Running 15 seconds ago

uzdfouv3s2bz my_web.2 httpd:latest host02 Running Running 21 minutes ago

f4tg54ze3hgg my_web.3 httpd:latest host02 Running Running 8 minutes ago

ve0j4of1m1ao my_web.4 httpd:latest host02 Running Ready 4 seconds ago

znf4m0jpa0r5 \_ my_web.4 httpd:latest host01 Shutdown Running 15 seconds ago

root@host02:~# docker ps | grep my_web

e46bd42b6fda httpd:latest "httpd-foreground" About a minute ago Up About a minute 80/tcp my_web.4.ve0j4of1m1aosbmpg9yew8dxr

5338df22fc68 httpd:latest "httpd-foreground" About a minute ago Up About a minute 80/tcp my_web.1.i4j8tplkkq348ae0tcdcrl38r

426a79228471 httpd:latest "httpd-foreground" 10 minutes ago Up 10 minutes 80/tcp my_web.3.f4tg54ze3hggppy96jldhtdxs

5c5fffec6de6 httpd:latest "httpd-foreground" 23 minutes ago Up 23 minutes 80/tcp my_web.2.uzdfouv3s2bz0ohyahjeeyqao

root@host02:~# docker exec my_web.1.i4j8tplkkq348ae0tcdcrl38r cat /usr/local/apache2/htdocs/index.html

docker swarm nfs volume test

add test str

root@host02:~# docker exec my_web.4.ve0j4of1m1aosbmpg9yew8dxr cat /usr/local/apache2/htdocs/index.html

docker swarm nfs volume test

add test str

root@host03:~# curl http://10.12.31.211 # 因为host01 关机了，所有host01的ip也访问不了了

curl: (7) Failed to connect to 10.12.31.211 port 80: No route to host

root@host03:~# curl http://10.12.31.212

docker swarm nfs volume test

add test str

root@host03:~# curl http://10.12.31.213

docker swarm nfs volume test

add test str

巴特西

104、验证Swarm数据持久性（Swarm11）

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巴特西

104、验证Swarm数据持久性 （Swarm11）

最新文章

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104、验证Swarm数据持久性（Swarm11）