Etcd访问控制
1. ETCD资源类型
There are three types of resources in etcd
permission resources: users and roles in the user store
key-value resources: key-value pairs in the key-value store
settings resources: security settings, auth settings, and dynamic etcd cluster settings (election/heartbeat)
2. 权限资源
Users：user用来设置身份认证（user：passwd），一个用户可以拥有多个角色，每个角色被分配一定的权限（只读、只写、可读写），用户分为root用户和非root用户。
Roles：角色用来关联权限，角色主要三类：root角色。默认创建root用户时即创建了root角色，该角色拥有所有权限；guest角色，默认自动创建，主要用于非认证使用。普通角色，由root用户创建角色，并分配指定权限。
注意：如果没有指定任何验证方式，即没显示指定以什么用户进行访问，那么默认会设定为 guest 角色。默认情况下 guest 也是具有全局访问权限的。如果不希望未授权就获取或修改etcd的数据，则可收回guest角色的权限或删除该角色，etcdctl role revoke 。
Permissions:权限分为只读、只写、可读写三种权限，权限即对指定目录或key的读写权限。
3. ETCD访问控制
3.1. 访问控制相关命令
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NAME: etcdctl - A simple command line client for etcd. USAGE: etcdctl [global options] command [command options] [arguments...] VERSION: 2.2.0 COMMANDS: user user add, grant and revoke subcommands role role add, grant and revoke subcommands auth overall auth controls GLOBAL OPTIONS: --peers, -C a comma-delimited list of machine addresses in the cluster (default: "http://127.0.0.1:4001,http://127.0.0.1:2379") --endpoint a comma-delimited list of machine addresses in the cluster (default: "http://127.0.0.1:4001,http://127.0.0.1:2379") --cert-file identify HTTPS client using this SSL certificate file --key-file identify HTTPS client using this SSL key file --ca-file verify certificates of HTTPS-enabled servers using this CA bundle --username, -u provide username[:password] and prompt if password is not supplied. --timeout '1s' connection timeout per request |
3.2. user相关命令
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[root@localhost etcd]# etcdctl user --help NAME: etcdctl user - user add, grant and revoke subcommands USAGE: etcdctl user command [command options] [arguments...] COMMANDS: add add a new user for the etcd cluster get get details for a user list list all current users remove remove a user for the etcd cluster grant grant roles to an etcd user revoke revoke roles for an etcd user passwd change password for a user help, h Shows a list of commands or help for one command OPTIONS: --help, -h show help |
3.2.1. 添加root用户并设置密码
etcdctl –endpoints http://172.16.22.36:2379 user add root
3.2.2. 添加非root用户并设置密码
etcdctl –endpoints http://172.16.22.36:2379 –username root:123 user add huwh
3.2.3. 查看当前所有用户
etcdctl –endpoints http://172.16.22.36:2379 –username root:123 user list
3.2.4. 将用户添加到对应角色
etcdctl –endpoints http://172.16.22.36:2379 –username root:123 user grant –roles test1 phpor
3.2.5. 查看用户拥有哪些角色
etcdctl –endpoints http://172.16.22.36:2379 –username root:123 user get phpor
3.3. role相关命令
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[root@localhost etcd]# etcdctl role --help NAME: etcdctl role - role add, grant and revoke subcommands USAGE: etcdctl role command [command options] [arguments...] COMMANDS: add add a new role for the etcd cluster get get details for a role list list all roles remove remove a role from the etcd cluster grant grant path matches to an etcd role revoke revoke path matches for an etcd role help, h Shows a list of commands or help for one command OPTIONS: --help, -h show help |
3.3.1. 添加角色
etcdctl –endpoints http://172.16.22.36:2379 –username root:2379 role add test1
3.3.2. 查看所有角色
etcdctl –endpoints http://172.16.22.36:2379 –username root:123 role list
3.3.3. 给角色分配权限
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[root@localhost etcd]# etcdctl role grant --help NAME: grant - grant path matches to an etcd role USAGE: command grant [command options] [arguments...] OPTIONS: --path Path granted for the role to access --read Grant read-only access --write Grant write-only access --readwrite Grant read-write access |
1、只包含目录
etcdctl –endpoints http://172.16.22.36:2379 –username root:123 role grant –readwrite –path /test1 test1
2、包括目录和子目录或文件
etcdctl –endpoints http://172.16.22.36:2379 –username root:123 role grant –readwrite –path /test1/* test1
3.3.4. 查看角色所拥有的权限
etcdctl –endpoints http://172.16.22.36:2379 –username root:2379 role get test1
3.4. auth相关操作
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[root@localhost etcd]# etcdctl auth --help NAME: etcdctl auth - overall auth controls USAGE: etcdctl auth command [command options] [arguments...] COMMANDS: enable enable auth access controls disable disable auth access controls help, h Shows a list of commands or help for one command OPTIONS: --help, -h show help |
3.4.1. 开启认证
etcdctl –endpoints http://172.16.22.36:2379 auth enable
4. 访问控制设置步骤
| 顺序 | 步骤 | 命令 |
|---|---|---|
| 1 | 添加root用户 | etcdctl –endpoints http://: user add root |
| 2 | 开启认证 | etcdctl –endpoints http://: auth enable |
| 3 | 添加非root用户 | etcdctl –endpoints http://: –username root: user add |
| 4 | 添加角色 | etcdctl –endpoints http://: –username root: role add |
| 5 | 给角色授权（只读、只写、可读写） | etcdctl –endpoints http://: –username root: role grant –readwrite –path |
| 6 | 给用户分配角色（即分配了角色对应的权限） | etcdctl –endpoints http://: –username root: user grant –roles |
5. 访问认证的API调用
更多参考
https://coreos.com/etcd/docs/latest/v2/auth_api.html
https://coreos.com/etcd/docs/latest/v2/authentication.html