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
再另一台机器也是如此安装。
2.集群配置
上面的安装都是在单台服务上的。下面说说集群的安装。
转载自http://blog.csdn.net/u010511236/article/details/52386229
