【云原生 | 47】etcdctl客户端的使用方法详解

使用etcdctl客户端

$ etcdctl [全局选项]命令[命令选项] [命令参数]

1、数据类操作 

1.1 set 

$ etcdctl set /testdir/testkey "Hello world"
Hello world

1.2 get 

$ etcdctl set testkey hello
hello
$ etcdctl update testkey world
world

$ etcdctl get testkey2
Error: 100: Key not found (/testkey2)

1.3 update 

$ etcdctl set testkey hello
hello
$ etcdctl update testkey world
world

$ etcdctl update testkey2 world
Error: 100: Key not found (/testkey2)

1.4 mk

$ etcdctl mk /testdir/testkey "Hello world"
Hello world

$ etcdctl set testkey "Hello world"
Hello world
$ ./etcdctl mk testkey "Hello world"
Error: 105: Key already exists (/testkey)

1.5 rm 

$ etcdctl rm testkey

$ etcdctl rm testkey2
Error: 100: Key not found (/testkey2)

1.6 watch 

$ etcdctl watch testkey
Hello world

1.7 exec-watch 

$ etcdctl exec-watch testkey -- sh -c 'ls'
default.etcd
Documentation
etcd
etcdctl
etcd-migrate
README-etcdctl.md
README.md

1.8 ls 

$ ./etcdctl set testkey 'hi'
hi
$ ./etcdctl set dir/test 'hello'
hello
$ ./etcdctl ls
/testkey
/dir
$ ./etcdctl ls dir
/dir/test

1.9 mkdir 

$ etcdctl mkdir testdir

$ etcdctl mkdir testdir
$ etcdctl mkdir testdir
Error: 105: Key already exists (/testdir)

1.10 rmdir 

$ etcdctl set /dir/testkey hi
hi
$ etcdctl rmdir /dir
Error: 108: Directory not empty (/dir)

1.11 setdir 

$ etcdctl setdir /test/test
$ etcdctl ls --recursive
/test
/test/test

1.12 updatedir 

$ etcdctl mkdir /test/test --ttl 100
$ etcdctl updatedir /test/test --ttl 200

2、非数据类操作 

2.1 backup 

$ etcdctl backup --data-dir default.etcd --backup-dir tmp

$ ls tmp/member
snap wal

2.2 cluster-health 

$ etcdctl cluster-health
member ce2a822cea30bfca is healthy: got healthy result from http://localhost:2379
cluster is healthy

2.3 member 

$ etcdctl member list
ce2a822cea30bfca: name=default peerURLs=http://localhost:2380,http://localhost:
7001 clientURLs=http://localhost:2379,http://localhost:4001

2.4 import 

$ etcdctl import --snap tmp/member/snap/0000000000000003-0000000000061aa8.snap
starting to import snapshot tmp/member/snap/0000000000000003-0000000000061aa8.
snap with 10 clients
entering dir: /
copying key: /key 1
finished importing 1 keys

2.5 user 

$ etcdctl user add root
New password:

$ etcdctl user add testuser
New password:

$ etcdctl user grant testuser -roles testrole

2.6 role 

$ etcdctl role add testrole
$ etcdctl role grant testrole -path '/key/*' -read

2.7 auth 

$ etcdctl auth enable

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