docker-compose搭建etcd集群的實現(三節點)
1. 環境說明
節點 | IP |
---|---|
etcd1 | 10.10.239.31 |
etcd2 | 10.10.239.32 |
etcd3 | 10.10.239.33 |
2. 部署
etcd1
ymal文件
version: "3.0" services: etcd1: image: bitnami/etcd:latest container_name: etcd1 restart: always ports: - "2379:2379" - "2380:2380" environment: - ALLOW_NONE_AUTHENTICATION=yes #示例中我們不設置密碼 - ETCD_NAME=etcd1 #節點自己的名字 - ETCD_ADVERTISE_CLIENT_URLS=http://10.10.239.31:2379 #告知集群自己的客戶端地址 - ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379 #設置監聽客戶端通訊的URL列表 - ETCD_INITIAL_ADVERTISE_PEER_URLS=http://10.10.239.31:2380 #告知集群自己集群通訊地址 - ETCD_LISTEN_PEER_URLS=http://0.0.0.0:2380 #用於監聽夥伴通訊的URL列表 - ETCD_INITIAL_CLUSTER_TOKEN=etcd-cluster #etcd 集群的初始化集群記號 - ETCD_INITIAL_CLUSTER=etcd1=http://10.10.239.31:2380,etcd2=http://10.10.239.32:2380,etcd3=http://10.10.239.33:2380 #集群成員 - ETCD_INITIAL_CLUSTER_STATE=new #初始化集群狀態 volumes: - ./data:/bitnami/etcd
持久化
如果此時啟動,會在當前目錄下創建 ./data 目錄,掛載到容器的 /bitnami/etcd ,但我們要註意的是,容器中啟動etcd的用戶並不是root用戶,很可能沒有在目錄下創建文件的權限。我們有兩個方案:
【方法一】給777權限(不建議)
【方法二】所屬主改成對應宿主機用戶(建議)
方法二操作:
- 先給./data目錄777權限
- 查看新生成的文件屬主是宿主機哪個用戶,就將./data目錄屬主改為哪個用戶
- 再將權限改回755或750,重啟容器
啟動服務
[root@liubei-01 etcd1]# docker-compose up -d
查看結果
[root@liubei-01 etcd1]# docker-compose ps Name Command State Ports ----------------------------------------------------------------------------------------------- etcd1 /opt/bitnami/scripts/etcd/ ... Up 0.0.0.0:2379->2379/tcp, 0.0.0.0:2380->2380/tcp
etcd2
ymal文件
version: "3.0" services: etcd1: image: bitnami/etcd:latest container_name: etcd2 restart: always ports: - "2379:2379" - "2380:2380" environment: - ALLOW_NONE_AUTHENTICATION=yes - ETCD_NAME=etcd2 - ETCD_ADVERTISE_CLIENT_URLS=http://10.10.239.32:2379 - ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379 - ETCD_INITIAL_ADVERTISE_PEER_URLS=http://10.10.239.32:2380 - ETCD_LISTEN_PEER_URLS=http://0.0.0.0:2380 - ETCD_INITIAL_CLUSTER_TOKEN=etcd-cluster - ETCD_INITIAL_CLUSTER=etcd1=http://10.10.239.31:2380,etcd2=http://10.10.239.32:2380,etcd3=http://10.10.239.33:2380 - ETCD_INITIAL_CLUSTER_STATE=new volumes: - ./data:/bitnami/etcd
持久化(同上)
啟動服務(同上)
etcd3
ymal文件
version: "3.0" services: etcd1: image: bitnami/etcd:latest container_name: etcd3 restart: always ports: - "2379:2379" - "2380:2380" environment: - ALLOW_NONE_AUTHENTICATION=yes - ETCD_NAME=etcd3 - ETCD_ADVERTISE_CLIENT_URLS=http://10.10.239.33:2379 - ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379 - ETCD_INITIAL_ADVERTISE_PEER_URLS=http://10.10.239.33:2380 - ETCD_LISTEN_PEER_URLS=http://0.0.0.0:2380 - ETCD_INITIAL_CLUSTER_TOKEN=etcd-cluster - ETCD_INITIAL_CLUSTER=etcd1=http://10.10.239.31:2380,etcd2=http://10.10.239.32:2380,etcd3=http://10.10.239.33:2380 - ETCD_INITIAL_CLUSTER_STATE=new volumes: - ./data:/bitnami/etcd
持久化(同上)
啟動服務(同上)
3. 驗證
3.1 查看集群狀態
查看集群成員
I have no name!@555187fb758c:/opt/bitnami/etcd$ etcdctl --write-out=table member list +------------------+---------+-------+--------------------------+--------------------------+------------+ | ID | STATUS | NAME | PEER ADDRS | CLIENT ADDRS | IS LEARNER | +------------------+---------+-------+--------------------------+--------------------------+------------+ | 57d6f74aaa8d5d3e | started | etcd1 | http://10.10.239.31:2380 | http://10.10.239.31:2379 | false | | 9107e491ab549324 | started | etcd3 | http://10.10.239.33:2380 | http://10.10.239.33:2379 | false | | e7b147006e212ca5 | started | etcd2 | http://10.10.239.32:2380 | http://10.10.239.32:2379 | false | +------------------+---------+-------+--------------------------+--------------------------+------------+
查看本節點狀態
I have no name!@555187fb758c:/opt/bitnami/etcd$ etcdctl --write-out=table endpoint status +----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | ENDPOINT | ID | VERSION | DB SIZE | IS LEADER | IS LEARNER | RAFT TERM | RAFT INDEX | RAFT APPLIED INDEX | ERRORS | +----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+ | 127.0.0.1:2379 | 57d6f74aaa8d5d3e | 3.5.4 | 20 kB | true | false | 2 | 10 | 10 | | +----------------+------------------+---------+---------+-----------+------------+-----------+------------+--------------------+--------+
查看本節點健康狀態
I have no name!@555187fb758c:/opt/bitnami/etcd$ etcdctl --write-out=table endpoint health +----------------+--------+------------+-------+ | ENDPOINT | HEALTH | TOOK | ERROR | +----------------+--------+------------+-------+ | 127.0.0.1:2379 | true | 3.736825ms | | +----------------+--------+------------+-------+
3.2 讀寫測試
登錄其中一個節點,進入容器,寫一條數據
zai
[root@liubei-01 etcd3]# docker exec -it 788 bash I have no name!@788dd01aaa79:/opt/bitnami/etcd$ etcd etcd etcdctl I have no name!@788dd01aaa79:/opt/bitnami/etcd$ etcdctl put name "liubei" OK
登錄另一個節點,進入容器,讀取數據
[root@liubei-02 ~]# docker exec -it 555 bash I have no name!@555187fb758c:/opt/bitnami/etcd$ etcdctl get name name liubei
到此這篇關於docker-compose搭建etcd集群的實現(三節點)的文章就介紹到這瞭,更多相關docker-compose搭建etcd集群內容請搜索WalkonNet以前的文章或繼續瀏覽下面的相關文章希望大傢以後多多支持WalkonNet!
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