docker-compose搭建zookeeper集羣環境 CodingCode

時間 2019-11-05

標籤 docker compose 搭建 zookeeper 集羣環境 codingcode 欄目 Docker 简体版

原文原文鏈接

docker-compose搭建zookeeper集羣環境

編輯docker-compose.yaml文件

version: '2'
networks:
  byfn:

services:
  zookeeper1:
    image: zookeeper
    container_name: zookeeper1
    environment:
        - ZOO_MY_ID=1
        - ZOO_SERVERS=server.1=zookeeper1:2888:3888 server.2=zookeeper2:2888:3888 server.3=zookeeper3:2888:3888
    ports:
      - 2181
    networks:
      - byfn

  zookeeper2:
    image: zookeeper
    container_name: zookeeper2
    environment:
        - ZOO_MY_ID=2
        - ZOO_SERVERS=server.1=zookeeper1:2888:3888 server.2=zookeeper2:2888:3888 server.3=zookeeper3:2888:3888
    ports:
      - 2181
    networks:
      - byfn

  zookeeper3:
    image: zookeeper
    container_name: zookeeper3
    environment:
        - ZOO_MY_ID=3
        - ZOO_SERVERS=server.1=zookeeper1:2888:3888 server.2=zookeeper2:2888:3888 server.3=zookeeper3:2888:3888
    ports:
      - 2181
    networks:
      - byfn

詳細的配置請參考文檔：https://hub.docker.com/_/zookeeper/
這裏很是清楚的描述瞭如何修改配置，存儲數據，以及調整日誌級別以及輸出等設置。ruby

啓動服務

$ docker-compose up

驗證集羣的狀態

$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES c1f7646bf0e6 zookeeper "/docker-entrypoin..." 23 minutes ago Up 23 minutes 2888/tcp, 3888/tcp, 0.0.0.0:32794->2181/tcp zookeeper2 7e05f06c258d zookeeper "/docker-entrypoin..." 23 minutes ago Up 23 minutes 2888/tcp, 3888/tcp, 0.0.0.0:32793->2181/tcp zookeeper3 d293438c1813 zookeeper "/docker-entrypoin..." 23 minutes ago Up 23 minutes 2888/tcp, 3888/tcp, 0.0.0.0:32792->2181/tcp zookeeper1 $ docker exec -t zookeeper1 zkServer.sh status ZooKeeper JMX enabled by default Using config: /conf/zoo.cfg Mode: follower $ docker exec -t zookeeper2 zkServer.sh status ZooKeeper JMX enabled by default Using config: /conf/zoo.cfg Mode: follower $ docker exec -t zookeeper3 zkServer.sh status ZooKeeper JMX enabled by default Using config: /conf/zoo.cfg Mode: leader

這裏咱們看到三個zookeeper節點，zookeeper3是leader，zookeeper1和zookeeper2是follower。bash

其餘狀態檢查命令：架構

$ nc localhost 32794 <<< ruok imok $ echo srvr | nc localhost 32794 Zookeeper version: 3.4.13-2d71af4dbe22557fda74f9a9b4309b15a7487f03, built on 06/29/2018 04:05 GMT Latency min/avg/max: 0/7/116 Received: 40 Sent: 39 Connections: 1 Outstanding: 0 Zxid: 0x10000000e Mode: follower Node count: 5

集羣的使用

4.1 基本操做tcp

[zk: localhost:2181(CONNECTED) 4] create /foo "Hello foo" Created /foo [zk: localhost:2181(CONNECTED) 5] get /foo Hello foo cZxid = 0x100000013 ctime = Fri Jan 04 02:29:47 GMT 2019 mZxid = 0x100000013 mtime = Fri Jan 04 02:29:47 GMT 2019 pZxid = 0x100000013 cversion = 0 dataVersion = 0 aclVersion = 0 ephemeralOwner = 0x0 dataLength = 9 numChildren = 0 [zk: localhost:2181(CONNECTED) 6] ls /foo []

4.2 建立路徑create微服務

[zk: localhost:2181(CONNECTED) 7] create /foo1/foo1 "Hello foo1" Node does not exist: /foo1/foo1

建立失敗，由於zookeeper不支持遞歸建立，必須先一級一級的建立父目錄節點。
建立父目錄時，讓值爲空就能夠。(其實目錄也能夠帶值，二者並不衝突。)ui

[zk: localhost:2181(CONNECTED) 14] create /foo1 "" # 或者：create /foo1 "" Created /foo1 [zk: localhost:2181(CONNECTED) 15] create /foo1/foo1 "Hello foo1" Created /foo1/foo1

4.3 查看節點的元素lsspa

[zk: localhost:2181(CONNECTED) 21] ls /foo1 [foo1]

由於/foo1是一個目錄，他下面有一個子節點/foo1/foo1

[zk: localhost:2181(CONNECTED) 21] ls /foo1/foo1 []

由於/foo1/foo1是一個元節點，他下面沒有子節點了。

注意，ls命令只能列出一級目錄，不能遞歸列出全部的子目錄。

4.4 獲取值get

get /foo1/foo1

4.5 修改值set

set /foo1/foo1 'newvalue'

4.6 刪除節點delete

delete /foo1/foo1

注意只能刪除子節點爲空的節點；因此若是要刪除一個節點，必須先把全部的子節點都刪除。若是要刪除非空目錄，還能夠使用rmr命令。

做者：CodingCode 連接：https://www.jianshu.com/p/8d31ede99206 來源：簡書著做權歸做者全部。商業轉載請聯繫做者得到受權，非商業轉載請註明出處。

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