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[New Stmt] Support setting replica status manually (#1522)

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Sometimes a replica is broken on BE, but FE does not notice that.
In this case, we have to manually delete that replica on BE.
If there are hundreds of replicas need to be handled, this is a disaster.

So I add a new stmt:

    ADMIN SET REPLICA STATUS

which support setting tablet on specified BE as BAD or OK.
This commit is contained in:
Mingyu Chen
2020-03-16 13:42:30 +08:00
committed by GitHub
parent 64a06ea9d4
commit 14c088161c
12 changed files with 520 additions and 8 deletions
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# ADMIN SET REPLICA STATUS
## description
This commend is used to set the status of the specified replica.
    This command is currently only used to manually set the status of some replicas to BAD or OK, allowing the system to automatically repair these replicas.
Syntax:
ADMIN SET REPLICA STATUS
PROPERTIES ("key" = "value", ...);
The following attributes are currently supported:
"tablet_id": required. Specify a Tablet Id.
"backend_id": required. Specify a Backend Id.
"status": required. Specify the status. Only "bad" and "ok" are currently supported.
If the specified replica does not exist or the status is already bad or ok, it will be ignored.
Notice:
Replica set to Bad status may be dropped immediately, please proceed with caution.
## example
1. Set the replica status of tablet 10003 on BE 10001 to bad.
ADMIN SET REPLICA STATUS PROPERTIES("tablet_id" = "10003", "backend_id" = "10001", "status" = "bad");
2. Set the replica status of tablet 10003 on BE 10001 to ok.
ADMIN SET REPLICA STATUS PROPERTIES("tablet_id" = "10003", "backend_id" = "10001", "status" = "ok");
## keyword
ADMIN,SET,REPLICA,STATUS