运维之我的docker-compose快速创建zookeeper集群

时间:2017-03-27 12:29 来源:武松娱乐整理 字体:[ ] 评论:
运维之我的docker-compose快速创建zookeeper集群。很多时候大家不同的容器想要不用启动参数这个时候不妨使用脚本封装来实现,官方也很推荐这个做法,这里介绍下如何使用脚本传参快速启动一个zookeeper集群。 zookeeper集群大家知道有部分通用配置,和一些动态配置如果用一个简单的zookeeper实例无法正常启动集群,所以我们的节点列表和节点ID是需要动态传入的所以下面的脚本的${ZK_ID}和${ZK_LIST}是需要你使用compose的配置传入的。 zookeeper启动脚本 https://code.aliyun.com/nginxs/docker/blob/master/pkg/zookeeper/docker-entrypoint.sh [root@test-nodepkg]#catzookeeper/docker-entrypoint.sh #!/bin/bash ####################################################### #author:baishaohua# #mail:nginxs@126.com # #blog:new.nginxs.net # #msg:startupzookeeperclusterfordocker# ####################################################### #ShellBaseEnv ZK_HOME="/usr/local/zookeeper" ZK_CONF="${ZK_HOME}/conf/zoo.cfg" ZK_DATA="/var/lib/zookeeper" ZK_CONF_TXT="tickTime=2000\ninitLimit=10\nsyncLimit=5\ndataDir=${ZK_DATA}\nclientPort=2181" echo"zookeeperisstart" #initconfig echo-e${ZK_CONF_TXT}>${ZK_CONF} #ZK_NODE_LISTfromdockerargv foriin ${ZK_NODE_LIST} do echo"$i">>${ZK_CONF} done echo"${ZK_ID}">${ZK_DATA}/myid #thisshellmainfunction ${ZK_HOME}/bin/zkServer.shstart-foreground

Dockerfile文件配置

[root@test-node3pkg]#catzookeeper/Dockerfile FROMregistry.cn-hangzhou.aliyuncs.com/forker/centos7:last MAINTAINERbaishaohua #startupconfigure下面自动把zookeeper安装包安装到/usr/local/zookeeper目录 ADDzookeeper-3.5.1-alpha.tar.gz/usr/local/ RUNmv/usr/local/zookeeper-3.5.1-alpha/usr/local/zookeeper&&mkdir-p/var/lib/zookeeper/ RUNyum-yinstallmakegcclibgccgcc-c++glibc-develjava-1.8.0-openjdk COPYdocker-entrypoint.sh/usr/bin/ #ENVandCMD配置容器默认启动脚本和开放2181端口 CMD["/usr/bin/docker-entrypoint.sh"] EXPOSE2181 重点来了我们要从docker-compose.yml传参到启动脚本 下面通过environment定义环境变量把参数传递到容器的启动脚本,完成自定义部分内容 https://code.aliyun.com/nginxs/docker/blob/master/pkg/zk_cluster/docker-compose.yml [root@test-nodepkg]#catzk_cluster/docker-compose.yml version:'3' services: zk1: image:registry.cn-hangzhou.aliyuncs.com/forker/zookeeper restart:always container_name:zk1 ports: -"2181:2181" environment: ZK_ID:1 ZK_NODE_LIST:server.1=zk1:3181:4181server.2=zk2:3181:4181server.3=zk3:3181:4181 zk2: image:registry.cn-hangzhou.aliyuncs.com/forker/zookeeper restart:always container_name:zk2 ports: -"2182:2181" environment: ZK_ID:2 ZK_NODE_LIST:server.1=zk1:3181:4181server.2=zk2:3181:4181server.3=zk3:3181:4181 zk3: image:registry.cn-hangzhou.aliyuncs.com/forker/zookeeper restart:always container_name:zk3 ports: -"2183:2181" environment: ZK_ID:3 ZK_NODE_LIST:server.1=zk1:3181:4181server.2=zk2:3181:4181server.3=zk3:3181:4181 启动我的compose服务 这里可以看到其实zk1,zk2,zk3每个都是一个service,而且compose会为这个应用创建一个默认的桥接网络 [root@test-node3zk_cluster]#docker-composeup-d WARNING:TheDockerEngineyou'reusingisrunninginswarmmode. Composedoesnotuseswarmmodetodeployservicestomultiplenodesinaswarm.Allcontainerswillbescheduledonthecurrentnode. Todeployyourapplicationacrosstheswarm,use`dockerstackdeploy`. Creatingnetwork"zkcluster_default"withthedefaultdriver Creatingzk3 Creatingzk1 Creatingzk2 测试zookeeper集群 [root@test-nodezk_cluster]#echo"conf"|nclocalhost2181 clientPort=2181 secureClientPort=-1 dataDir=/var/lib/zookeeper/version-2 dataDirSize=67109393 dataLogDir=/var/lib/zookeeper/version-2 dataLogSize=67109393 tickTime=2000 maxClientCnxns=60 minSessionTimeout=4000 maxSessionTimeout=40000 serverId=1 initLimit=10 syncLimit=5 electionAlg=3 electionPort=4181 quorumPort=3181 peerType=0 membership: server.1=zk1:3181:4181:participant server.2=zk2:3181:4181:participant server.3=zk3:3181:4181:participant version=100000000
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