docker swarm的常用操作
阿新 • • 發佈：2018-11-03
1. 說明
本文件針對docker swarm操作。
針對的系統是以一個本地的測試系統為例。其中機器資訊如下，172.16.1.13作為docker swarm的管理機。
本地測試的機器列表資訊：
| 主機名 |
模擬的外網 |
內網IP |
要部署模組 |
| mini01 |
10.0.0.11 |
172.16.1.11 |
tomcat 【swarm管理】 |
| mini02 |
10.0.0.12 |
172.16.1.12 |
tomcat 【swarm管理】 |
| mini03 |
10.0.0.13 |
172.16.1.13 |
visualizer spark 【swarm管理】 zookeeper 【swarm管理】 hadoop-namnode 【swarm管理】 |
2. docker swarm初始化
根據規劃在172.16.1.13這臺機器上操作：
1 [[email protected] ~]# docker swarm init # 針對機器只有一個IP的情況 2 Error response from daemon: could not choose an IP address to advertise since this system has multiple addresses on different interfaces (172.16.1.13 on eth0 and 10.0.0.13 on eth1) - specify one with --advertise-addr 3 [[email protected] ~]# docker swarm init --advertise-addr 172.16.1.13 # 針對機器有多個IP的情況，需要指定一個IP，一般都是指定內網IP 4 Swarm initialized: current node (yo5f7qb28gf6g38ve4xhcis17) is now a manager. 5 6 To add a worker to this swarm, run the following command: 7 # 在其他機器上執行，這樣可以加入該swarm管理 8 docker swarm join --token SWMTKN-1-4929ovxh6agko49u0yokrzustjf6yzt30iv1zvwqn8d3pndm92-0kuha3sa80u2u27yca6kzdbnb 172.16.1.13:2377 9 10 To add a manager to this swarm, run 'docker swarm join-token manager' and follow the instructions.
得到加入到該swarm的命令
1 [[email protected] ~]# docker swarm join-token worker 2 To add a worker to this swarm, run the following command: 3 # 在其他機器上執行，這樣可以加入該swarm管理 4 docker swarm join --token SWMTKN-1-4929ovxh6agko49u0yokrzustjf6yzt30iv1zvwqn8d3pndm92-0kuha3sa80u2u27yca6kzdbnb 172.16.1.13:2377
3. 初始化網路
初始化一個swarm網路，讓系統元件使用這個指定的網路。
1 [[email protected] ~]# docker network create -d overlay --attachable zhang 2 vu07em5fvpuojih6wgckdkdzj 3 [[email protected] docker-swarm]# docker network ls # 檢視網路 4 NETWORK ID NAME DRIVER SCOPE 5 fa8a244c6bd5 bridge bridge local 6 51c95dea1e5c docker_gwbridge bridge local 7 7a7e31f4bce8 host host local 8 5hgg372xwxbl ingress overlay swarm 9 lmt3pjswf7l0 zhang overlay swarm 10 5ea08e9a282f none null local 11 [[email protected] ~]# docker network inspect zhang # 檢視網路資訊 12 [ 13 { 14 "Name": "zhang", 15 "Id": "xiykborz8hn2td40ykhi20dck", 16 "Created": "0001-01-01T00:00:00Z", 17 "Scope": "swarm", 18 "Driver": "overlay", 19 "EnableIPv6": false, 20 "IPAM": { 21 "Driver": "default", 22 "Options": null, 23 "Config": [] 24 }, 25 "Internal": false, 26 "Attachable": true, 27 "Ingress": false, 28 "ConfigFrom": { 29 "Network": "" 30 }, 31 "ConfigOnly": false, 32 "Containers": null, 33 "Options": { 34 "com.docker.network.driver.overlay.vxlanid_list": "4097" 35 }, 36 "Labels": null 37 } 38 ]
刪除網路【慎用】
刪除docker中的zhang網路
1 [[email protected] docker-swarm]# docker network rm zhang 2 zhang 3 [[email protected] docker-swarm]# docker network ls 4 NETWORK ID NAME DRIVER SCOPE 5 fa8a244c6bd5 bridge bridge local 6 51c95dea1e5c docker_gwbridge bridge local 7 7a7e31f4bce8 host host local 8 5hgg372xwxbl ingress overlay swarm 9 5ea08e9a282f none null local
4. 加入或退出swarm管理
在mini01、mini02上執行 docker swarm join --token SWMTKN-1-4929ovxh6agko49u0yokrzustjf6yzt30iv1zvwqn8d3pndm92-0kuha3sa80u2u27yca6kzdbnb 172.16.1.13:2377 命令。
4.1. 當前swarm有哪些節點
1 [[email protected] ~]# docker node ls 2 ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION 3 2pfwllgxpajx5aitlvcih9vsq mini01 Ready Active 17.09.0-ce 4 zho14u85itt5l2i6cpg8fcd6t mini02 Ready Active 17.09.0-ce 5 yo5f7qb28gf6g38ve4xhcis17 * mini03 Ready Active Leader 17.09.0-ce
4.2. 退出當前的swarm節點
1 # 在swarm管理機mini03上的操作 2 # 其中 2pfwllgxpajx5aitlvcih9vsq 是mini01在swarm機器上的ID，根據docker node ls 獲取 3 [[email protected] ~]# docker node rm --force 2pfwllgxpajx5aitlvcih9vsq # 如果mini01上的docker沒有停止服務，那麼就需要使用 --force 選項 4 2pfwllgxpajx5aitlvcih9vsq 5 [[email protected] ~]# docker node ls 6 ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION 7 zho14u85itt5l2i6cpg8fcd6t mini02 Ready Active 17.09.0-ce 8 yo5f7qb28gf6g38ve4xhcis17 * mini03 Ready Active Leader 17.09.0-ce 9 ########################################## 10 # 需要在mini01上執行的命令，這樣mini01才能徹底退出swarm管理 11 [[email protected] ~]# docker swarm leave 12 Node left the swarm.
4.3. swarm管理機退出swarm
首先需要刪除所有節點，然後強制退出swarm即可
1 [[email protected] ~]# docker node ls 2 ID HOSTNAME STATUS AVAILABILITY MANAGER STATUS ENGINE VERSION 3 yo5f7qb28gf6g38ve4xhcis17 * mini03 Ready Active Leader 17.09.0-ce 4 [[email protected] ~]# docker swarm leave --force # swarm管理機退出swarm，需要 --force 引數 5 Node left the swarm. 6 [[email protected] ~]# docker node ls 7 Error response from daemon: This node is not a swarm manager. Use "docker swarm init" or "docker swarm join" to connect this node to swarm and try again.
4.4. 當前swarm有哪些服務
1 [[email protected] ~]# docker service ls # 只是示例，不是實際資料 2 ID NAME MODE REPLICAS IMAGE PORTS 3 lq7zkkal6ujt hadoop_datanode global 2/2 bde2020/hadoop-datanode:2.0.0-hadoop2.7.4-java8 4 ph2fu37k886b hadoop_namenode replicated 1/1 bde2020/hadoop-namenode:2.0.0-hadoop2.7.4-java8 *:50070->50070/tcp 5 ca47u5i2ubes hbase-master replicated 1/1 bde2020/hbase-master:1.0.0-hbase1.2.6 *:16010->16010/tcp 6 mkks4oa2ppcn hbase-regionserver-1 replicated 1/1 bde2020/hbase-regionserver:1.0.0-hbase1.2.6 7 j4mhizg4j67p hbase-regionserver-2 replicated 1/1 bde2020/hbase-regionserver:1.0.0-hbase1.2.6 8 yndrkc2bcpra hbase_zoo1 replicated 1/1 zookeeper:3.4.10 *:2181->2181/tcp 9 r5ycrvo0zout spark_spark replicated 1/1 zhang/spark:latest *:4040->4040/tcp,*:7777->7777/tcp,*:8081->8081/tcp,*:18080->8080/tcp 10 f2v091nz24rg tomcat_tomcat global 2/2 zhang/tomcat:latest *:6543->6543/tcp,*:9999->9999/tcp,*:18081->8081/tcp 11 clfpryaerq2l visualizer replicated 1/1 dockersamples/visualizer:latest *:8080->8080/tcp
5. swarm標籤管理
5.1. 標籤新增
根據最開始的主機和元件部署規劃，標籤規劃如下：在swarm管理機mini03上執行。
1 # 給mini01機器的標籤 2 docker node update --label-add tomcat=true mini01 3 docker node update --label-add datanode=true mini01 4 docker node update --label-add hbase-regionserver-1=true mini01 5 6 # 給mini02機器的標籤 7 docker node update --label-add tomcat=true mini02 8 docker node update --label-add datanode=true mini02 9 docker node update --label-add hbase-regionserver-2=true mini02 10 11 # 給mini03機器的標籤 12 docker node update --label-add spark=true mini03 13 docker node update --label-add zookeeper=true mini03 14 docker node update --label-add namenode=true mini03 15 docker node update --label-add hbase-master=true mini03
5.2. 刪除標籤
在swarm管理機mini03上執行，示例如下：
1 docker node update --label-rm zookeeper mini03
5.3. 檢視swarm當前的標籤
在swarm管理機mini03上執行：
1 [[email protected] ~]# docker node ls -q | xargs docker node inspect -f '{{.ID}}[{{.Description.Hostname}}]:{{.Spec.Labels}}' 2 6f7dwt47y6qvgs3yc6l00nmjd[mini01]:map[tomcat:true datanode:true hbase-regionserver-1:true] 3 5q2nmm2xaexhkn20z8f8ezglr[mini02]:map[tomcat:true datanode:true hbase-regionserver-2:true] 4 ncppwjknhcwbegmliafut0718[mini03]:map[hbase-master:true namenode:true spark:true zookeeper:true]
6. 檢視日誌
啟動容器時，檢視相關日誌，例如如下：
1 docker stack ps hadoop 2 docker stack ps hadoop --format "{{.Name}}: {{.Error}}" 3 docker stack ps hadoop --format "{{.Name}}: {{.Error}}" --no-trunc 4 docker stack ps hadoop --no-trunc