Consul 集群7

2021-12-01 17:04:59 浏览数 (1)

存入值

我们先存入一些值，然后再取回

创建用 PUT 方法

代码语言：javascript复制
[root@h104 consul]# curl -X PUT -d 'soft.dog' http://localhost:8500/v1/kv/web/key1
true[root@h104 consul]# curl -X PUT -d 'soft.dog' http://localhost:8500/v1/kv/web/key2?flags=42
true[root@h104 consul]# curl -X PUT -d 'soft.dog' http://localhost:8500/v1/kv/web/sub/key3
true[root@h104 consul]# curl http://localhost:8500/v1/kv/?recurse
[{"LockIndex":0,"Key":"web/key1","Flags":0,"Value":"c29mdC5kb2c=","CreateIndex":909,"ModifyIndex":909},{"LockIndex":0,"Key":"web/key2","Flags":42,"Value":"c29mdC5kb2c=","CreateIndex":912,"ModifyIndex":912},{"LockIndex":0,"Key":"web/sub/key3","Flags":0,"Value":"c29mdC5kb2c=","CreateIndex":917,"ModifyIndex":917}][root@h104 consul]# 
[root@h104 consul]# 
[root@h104 consul]#

查询值

查询用 GET 方法

?recurse 参数是递归返回所有KV的意思， 如果要单独返回指定值可以使用指定key的方式

代码语言：javascript复制
[root@h104 consul]# curl  http://localhost:8500/v1/kv/web/key2
[{"LockIndex":0,"Key":"web/key2","Flags":42,"Value":"c29mdC5kb2c=","CreateIndex":912,"ModifyIndex":912}][root@h104 consul]# 
[root@h104 consul]#

删除值

删除用 DELETE 方法

代码语言：javascript复制
[root@h104 consul]# curl -X DELETE  http://localhost:8500/v1/kv/web/sub?recurse
true[root@h104 consul]# curl http://localhost:8500/v1/kv/web?recurse
[{"LockIndex":0,"Key":"web/key1","Flags":0,"Value":"c29mdC5kb2c=","CreateIndex":909,"ModifyIndex":909},{"LockIndex":0,"Key":"web/key2","Flags":42,"Value":"c29mdC5kb2c=","CreateIndex":912,"ModifyIndex":912}][root@h104 consul]# 
[root@h104 consul]#

更新值

更新和存值一样使用 PUT 方法，只是提供一个与原值不同的内容就可以了

代码语言：javascript复制
[root@h104 consul]# curl http://localhost:8500/v1/kv/web/key1
[{"LockIndex":0,"Key":"web/key1","Flags":0,"Value":"c29mdC5kb2c=","CreateIndex":909,"ModifyIndex":909}][root@h104 consul]# 
[root@h104 consul]# 
[root@h104 consul]# curl -X PUT -d 'great' http://localhost:8500/v1/kv/web/key1
true[root@h104 consul]# 
[root@h104 consul]# curl http://localhost:8500/v1/kv/web/key1
[{"LockIndex":0,"Key":"web/key1","Flags":0,"Value":"Z3JlYXQ=","CreateIndex":909,"ModifyIndex":1000}][root@h104 consul]# 
[root@h104 consul]#

ModifyIndex 会增加

条件更新

也就是检查更新， Check-And-Set ， 当 cas 指定的值与 ModifyIndex 相等时，才能成功更新，否则更新失败

代码语言：javascript复制
[root@h104 consul]# curl  http://localhost:8500/v1/kv/web/key1
[{"LockIndex":0,"Key":"web/key1","Flags":0,"Value":"Z3JlYXQ=","CreateIndex":909,"ModifyIndex":1061}][root@h104 consul]# 
[root@h104 consul]# 
[root@h104 consul]# curl -X PUT -d 'great' http://localhost:8500/v1/kv/web/key1?cas=1061
true[root@h104 consul]# 
[root@h104 consul]# curl -X PUT -d 'great' http://localhost:8500/v1/kv/web/key1?cas=1061
false[root@h104 consul]# 
[root@h104 consul]# curl  http://localhost:8500/v1/kv/web/key1
[{"LockIndex":0,"Key":"web/key1","Flags":0,"Value":"Z3JlYXQ=","CreateIndex":909,"ModifyIndex":1076}][root@h104 consul]# 
[root@h104 consul]#
cas get key put set

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