centos7安装etcd

最新推荐文章于 2025-07-17 15:24:27 发布

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本文介绍了etcd的安装步骤及集群配置方法。通过在VMware环境下安装CentOS7系统，详细展示了如何下载并安装etcd，以及如何通过etcdctl进行基本的操作验证安装成功。此外，还提供了集群配置的相关信息。

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通过上一篇博客（剖析etcd）已经对etcd有初步了解了，那么就动手实践安装吧。本次系统环境了是在vmware下安装了2个centos7系统（使用NAT方式，ip分别是192.168.174.128和192.168.174.129）。登录用户用root。

1.下载安装

https://github.com/coreos/etcd/releases 在这网页，你可以看到有多个版本共选择，也有不同OS下的下载方式例子，点击进去看就OK了。

使用curl -L下载curl -L https://github.com/coreos/etcd/releases/download/v3.1.0-alpha.1/etcd-v3.1.0-alpha.1-linux-amd64.tar.gz -o etcd-v3.1.0-alpha.1-linux-amd64.tar.gz 3.1.0是目前最新版本。

解压后，会看到etcd,etcdctl,将它们复制到/usr/local/bin或/usr/bin下

运行 etcd，将默认组建一个两个节点的集群。数据库服务端默认监听在 2379 和 4001 端口，etcd 实例监
听在 2380 和 7001 端口。显示类似如下的信息：

检查etcd是否正常了，那就通过etcdctl操作一些命令。注意操作前请先看看READ-etcdctl.ME和READv2-etcdctl.ME文件，其中READ-etcdctl.ME开头有句话。

就是说，要在环境变量中设置ETCDCTL_API=3.否则使用etcdctl时会报错（我一开始就没注意）

通过etcdctl --help查看有哪些命令

[root@localhost etcd-v3.1.0-alpha.1-linux-amd64]# etcdctl --help
NAME:
        etcdctl - A simple command line client for etcd3.

USAGE:
        etcdctl

VERSION:
        3.1.0-alpha.1

COMMANDS:
        get                     Gets the key or a range of keys
        put                     Puts the given key into the store
        del                     Removes the specified key or range of keys [key, range_end)
        txn                     Txn processes all the requests in one transaction
        compaction              Compacts the event history in etcd
        alarm disarm            Disarms all alarms
        alarm list              Lists all alarms
        defrag                  Defragments the storage of the etcd members with given endpoints
        endpoint health         Checks the healthiness of endpoints specified in `--endpoints` flag
        endpoint status         Prints out the status of endpoints specified in `--endpoints` flag
        watch                   Watches events stream on keys or prefixes
        version                 Prints the version of etcdctl
        lease grant             Creates leases
        lease revoke            Revokes leases
        lease timetolive        Get lease information
        lease keep-alive        Keeps leases alive (renew)
        member add              Adds a member into the cluster
        member remove           Removes a member from the cluster
        member update           Updates a member in the cluster
        member list             Lists all members in the cluster
        snapshot save           Stores an etcd node backend snapshot to a given file
        snapshot restore        Restores an etcd member snapshot to an etcd directory
        snapshot status         Gets backend snapshot status of a given file
        make-mirror             Makes a mirror at the destination etcd cluster
        migrate                 Migrates keys in a v2 store to a mvcc store
        lock                    Acquires a named lock
        elect                   Observes and participates in leader election
        auth enable             Enables authentication
        auth disable            Disables authentication
        user add                Adds a new user
        user delete             Deletes a user
        user get                Gets detailed information of a user
        user list               Lists all users
        user passwd             Changes password of user
        user grant-role         Grants a role to a user
        user revoke-role        Revokes a role from a user
        role add                Adds a new role
        role delete             Deletes a role
        role get                Gets detailed information of a role
        role list               Lists all roles
        role grant-permission   Grants a key to a role
        role revoke-permission  Revokes a key from a role
        help                    Help about any command

OPTIONS:
      --cacert=""                               verify certificates of TLS-enabled secure servers using this CA bundle
      --cert=""                                 identify secure client using this TLS certificate file
      --command-timeout=5s                      timeout for short running command (excluding dial timeout)
      --dial-timeout=2s                         dial timeout for client connections
      --endpoints=[127.0.0.1:2379]              gRPC endpoints
      --hex[=false]                             print byte strings as hex encoded strings
      --insecure-skip-tls-verify[=false]        skip server certificate verification
      --insecure-transport[=true]               disable transport security for client connections
      --key=""                                  identify secure client using this TLS key file
      --user=""                                 username[:password] for authentication (prompt if password is not supplied)
  -w, --write-out="simple"                      set the output format (json, proto, simple, table)

[root@localhost etcd-v3.1.0-alpha.1-linux-amd64]#

通过查看.md文件，里面有非常多关于etcdctl相关的操作命令，并且举例子说明，内容很多，这里就不贴了.测试

[root@localhost etcd-v3.1.0-alpha.1-linux-amd64]# etcdctl put testkey 'hello word'
OK
[root@localhost etcd-v3.1.0-alpha.1-linux-amd64]# etcdctl get testkey
testkey
hello word

说明安装成功了。

再另一台机器也是如此安装。