Add FindAllShardsInKeyspace to vtctldserver

[ajm188]

Backport

NO

Status

READY

Description

This PR adds the FindAllShardsInKeyspace command to the VtctldServer API. It also reimplements the vtctl command to use the same underlying codepath, but transforms the output to maintain backwards compatibility.

Local testing example

For a local example, I went through the local example up through 30x (reshard example). Then, both commands:

❯ vtctldclient --server "localhost:15999" findallshardsinkeyspace customer | jq '.' # new command, new output
{
  "shards": {
    "-80": {
      "keyspace": "customer",
      "name": "-80",
      "shard": {
        "master_alias": {
          "cell": "zone1",
          "uid": 300
        },
        "master_term_start_time": {
          "seconds": 1608237365,
          "nanoseconds": 274539000
        },
        "key_range": {
          "end": "gA=="
        },
        "is_master_serving": true
      }
    },
    "80-": {
      "keyspace": "customer",
      "name": "80-",
      "shard": {
        "master_alias": {
          "cell": "zone1",
          "uid": 400
        },
        "master_term_start_time": {
          "seconds": 1608237366,
          "nanoseconds": 193144000
        },
        "key_range": {
          "start": "gA=="
        },
        "is_master_serving": true
      }
    }
  }
}
❯ vtctlclient -server "localhost:15999" findallshardsinkeyspace customer | jq '.' # old command, maintaining same output format
{
  "-80": {
    "master_alias": {
      "cell": "zone1",
      "uid": 300
    },
    "master_term_start_time": {
      "seconds": 1608237365,
      "nanoseconds": 274539000
    },
    "key_range": {
      "end": "gA=="
    },
    "is_master_serving": true
  },
  "80-": {
    "master_alias": {
      "cell": "zone1",
      "uid": 400
    },
    "master_term_start_time": {
      "seconds": 1608237366,
      "nanoseconds": 193144000
    },
    "key_range": {
      "start": "gA=="
    },
    "is_master_serving": true
  }
}

Related Issue(s)

List related PRs against other branches:
#7135

Todos

• Tests
• Documentation

Deployment Notes

N/A

Impacted Areas in Vitess

List general components of the application that this PR will affect:

• Query Serving
• VReplication
• Cluster Management
• Build

[rohit-nayak-ps]

lgtm