[TOC] # 創建一個tomcat的service ``` > docker service create --name my-tomcat tomcat ``` # 查看當前swarm的service ``` docker service ls ``` # 查看service的啟動日志 ``` docker service logs my-tomcat ``` # 查看service的詳情 ``` docker service inspect my-tomcat ``` # 查看my-tomcat運行在哪個node上 ``` docker service ps my-tomcat ``` `日志` ``` ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS u6o4mz4tj396 my-tomcat.1 tomcat:latest worker01-node Running Running 3 minutes ago ``` # 水平擴展service ``` docker service scale my-tomcat=3 docker service ls docker service ps my-tomcat ``` `日志`：可以發現，其他node上都運行了一個my-tomcat的service ``` [root@manager-node ~]# docker service ps my-tomcat ID NAME IMAGE NODE DESIRED STATE CURRENT STATE ERROR PORTS u6o4mz4tj396 my-tomcat.1 tomcat:latest worker01-node Running Running 8 minutes ago v505wdu3fxqo my-tomcat.2 tomcat:latest manager-node Running Running 46 seconds ago wpbsilp62sc0 my-tomcat.3 tomcat:latest worker02-node Running Running 49 seconds ago ``` 此時到worker01-node上：docker ps，可以發現container的name和service名稱不一樣，這點要知道 ``` CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES bc4b9bb097b8 tomcat:latest "catalina.sh run" 10 minutes ago Up 10 minutes 8080/tcp my-tomcat.1.u6o4mz4tj3969a1p3mquagxok ``` # 自動擴展 > 如果某個node上的my-tomcat掛掉了，這時候會自動擴展 ``` [worker01-node] docker rm -f containerid [manager-node] docker service ls docker service ps my-tomcat ``` # 刪除service ``` docker service rm my-tomcat ```