codis-dashboard宕机后启动异常

现象

dashboard机器宕机后重启发现网页显示不正常，dashboard日志有如下报错：

2018/01/25 21:11:15 main.go:171: [WARN] [0xc4202890e0] dashboard online failed [15]
2018/01/25 21:11:17 topom.go:189: [ERROR] store: acquire lock of codis-wyao failed
[error]: zk: node already exists
    6   /opt/gosrc/src/github.com/CodisLabs/codis/pkg/models/zk/zkclient.go:247
            github.com/CodisLabs/codis/pkg/models/zk.(*Client).create
    5   /opt/gosrc/src/github.com/CodisLabs/codis/pkg/models/zk/zkclient.go:196
            github.com/CodisLabs/codis/pkg/models/zk.(*Client).Create.func1
    4   /opt/gosrc/src/github.com/CodisLabs/codis/pkg/models/zk/zkclient.go:129
            github.com/CodisLabs/codis/pkg/models/zk.(*Client).shell
    3   /opt/gosrc/src/github.com/CodisLabs/codis/pkg/models/zk/zkclient.go:195
            github.com/CodisLabs/codis/pkg/models/zk.(*Client).Create
    2   /opt/gosrc/src/github.com/CodisLabs/codis/pkg/models/store.go:119
            github.com/CodisLabs/codis/pkg/models.(*Store).Acquire
    1   /opt/gosrc/src/github.com/CodisLabs/codis/pkg/topom/topom.go:188
            github.com/CodisLabs/codis/pkg/topom.(*Topom).Start
    0   /opt/gosrc/src/github.com/CodisLabs/codis/cmd/dashboard/main.go:169
            main.main
        ... ...
[stack]:
    1   /opt/gosrc/src/github.com/CodisLabs/codis/pkg/topom/topom.go:189
            github.com/CodisLabs/codis/pkg/topom.(*Topom).Start
    0   /opt/gosrc/src/github.com/CodisLabs/codis/cmd/dashboard/main.go:169
            main.main
        ... ...

解决方法

1. 用如下的命令删除zookeeper中的锁

./codis-admin --remove-lock --product=codis-wyao --zookeeper=192.168.233.132

2. 重启dashboard