Codis 基础18

franket

发布于 2022-03-25 10:10:36

1860

发布于 2022-03-25 10:10:36

文章被收录于专栏：技术杂记

此时，容易导致dashboard 起不来，报错如下

[root@h102 codis]# bin/codis-config dashboard
2015/12/04 22:38:14 dashboard.go:160: [INFO] dashboard listening on addr: :18087
2015/12/04 22:38:14 dashboard.go:234: [PANIC] create zk node failed
[error]: dashboard already exists: {"addr": "192.168.100.102:18087", "pid": 36106}
[stack]: 
    3   /root/go_home/src/github.com/wandoulabs/codis/cmd/cconfig/dashboard.go:234
            main.runDashboard
    2   /root/go_home/src/github.com/wandoulabs/codis/cmd/cconfig/dashboard.go:54
            main.cmdDashboard
    1   /root/go_home/src/github.com/wandoulabs/codis/cmd/cconfig/main.go:85
            main.runCommand
    0   /root/go_home/src/github.com/wandoulabs/codis/cmd/cconfig/main.go:152
            main.main
        ... ...
[root@h102 codis]#

但是直接使用ps查看当前进程，又发现系统中并没有残存任何dashboard进程，端口也并没有被占用

[root@h102 codis]# netstat -an | grep 18087
[root@h102 codis]#

这种情况是由于zk中留存上一次dashboard信息导致的

解决办法是，进入zk中手动删除

[zk: localhost:2181(CONNECTED) 8] ls /zk/codis/db_test/dashboard
[]
[zk: localhost:2181(CONNECTED) 9] get  /zk/codis/db_test/dashboard
{"addr": "192.168.100.102:18087", "pid": 36106}
cZxid = 0x143a
ctime = Fri Dec 04 21:17:34 CST 2015
mZxid = 0x143a
mtime = Fri Dec 04 21:17:34 CST 2015
pZxid = 0x143a
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 47
numChildren = 0
[zk: localhost:2181(CONNECTED) 10] rmr /zk/codis/db_test/dashboard
[zk: localhost:2181(CONNECTED) 11]

之后就可以正常启动了

[root@h102 codis]# bin/codis-config  dashboard 
2015/12/04 22:44:50 dashboard.go:160: [INFO] dashboard listening on addr: :18087
2015/12/04 22:44:50 dashboard.go:143: [INFO] dashboard node created: /zk/codis/db_test/dashboard, {"addr": "192.168.100.102:18087", "pid": 36799}
2015/12/04 22:44:50 dashboard.go:144: [WARN] ********** Attention **********
2015/12/04 22:44:50 dashboard.go:145: [WARN] You should use `kill {pid}` rather than `kill -9 {pid}` to stop me,
2015/12/04 22:44:50 dashboard.go:146: [WARN] or the node resisted on zk will not be cleaned when I'm quiting and you must remove it manually
2015/12/04 22:44:50 dashboard.go:147: [WARN] *******************************
...
...
...

原文地址http://soft.dog/2015/12/05/codis/