API Stability Preview

The refreshClusterManagementStats() GraphQL mutation may be used to force a refresh of the ClusterManagementStats cache and return reasonsNodeCannotBeSafelyUnregistered for the specified node.

When developing scripts to automate the unregistration of multiple evicted nodes at a time, this mutation can be called to validate that the node being unregistered can be terminated without risking data loss. As the mutation is expensive, it should not be called frequently.

Syntax

Below is the syntax for the refreshClusterManagementStats() mutation field:

graphql
refreshClusterManagementStats(
      nodeId: integer!
   ): RefreshClusterManagementStatsMutation!

There is no special input datatype for this mutation field. Below is an example of how it might be used:

Raw
graphql
mutation {
  refreshClusterManagementStats( nodeId: 3 )
    { reasonsNodeCannotBeSafelyUnregistered { isAlive, hasUnderReplicatedData } }
}
Mac OS or Linux (curl)
shell
curl -v -X POST $YOUR_LOGSCALE_URL/graphql \
    -H "Authorization: Bearer $TOKEN" \
    -H "Content-Type: application/json" \
    -d @- << EOF
{"query" : "mutation {
  refreshClusterManagementStats( nodeId: 3 )
    { reasonsNodeCannotBeSafelyUnregistered { isAlive, hasUnderReplicatedData } }
}"
}
EOF
Mac OS or Linux (curl) One-line
shell
curl -v -X POST $YOUR_LOGSCALE_URL/graphql \
    -H "Authorization: Bearer $TOKEN" \
    -H "Content-Type: application/json" \
    -d @- << EOF
{"query" : "mutation {
  refreshClusterManagementStats( nodeId: 3 )
    { reasonsNodeCannotBeSafelyUnregistered { isAlive, hasUnderReplicatedData } }
}"
}
EOF
Windows Cmd and curl
shell
curl -v -X POST $YOUR_LOGSCALE_URL/graphql ^
    -H "Authorization: Bearer $TOKEN" ^
    -H "Content-Type: application/json" ^
    -d @'{"query" : "mutation { ^
  refreshClusterManagementStats( nodeId: 3 ) ^
    { reasonsNodeCannotBeSafelyUnregistered { isAlive, hasUnderReplicatedData } } ^
}" ^
} '
Windows Powershell and curl
powershell
curl.exe -X POST 
    -H "Authorization: Bearer $TOKEN"
    -H "Content-Type: application/json"
    -d '{"query" : "mutation {
  refreshClusterManagementStats( nodeId: 3 )
    { reasonsNodeCannotBeSafelyUnregistered { isAlive, hasUnderReplicatedData } }
}"
}'
    "$YOUR_LOGSCALE_URL/graphql"
Perl
perl
#!/usr/bin/perl

use HTTP::Request;
use LWP;

my $TOKEN = "TOKEN";

my $uri = '$YOUR_LOGSCALE_URL/graphql';

my $query = "mutation {
  refreshClusterManagementStats( nodeId: 3 )
    { reasonsNodeCannotBeSafelyUnregistered { isAlive, hasUnderReplicatedData } }
}";
$query =~ s/\n/ /g;
my $json = sprintf('{"query" : "%s"}',$query);
my $req = HTTP::Request->new("POST", $uri );

$req->header("Authorization" => "Bearer $TOKEN");
$req->header("Content-Type" => "application/json");

$req->content( $json );

my $lwp = LWP::UserAgent->new;

my $result = $lwp->request( $req );

print $result->{"_content"},"\n";
Python
python
#! /usr/local/bin/python3

import requests

url = '$YOUR_LOGSCALE_URL/graphql'
mydata = r'''{"query" : "mutation {
  refreshClusterManagementStats( nodeId: 3 )
    { reasonsNodeCannotBeSafelyUnregistered { isAlive, hasUnderReplicatedData } }
}"
}'''

resp = requests.post(url,
                     data = mydata,
                     headers = {
   "Authorization" : "Bearer $TOKEN",
   "Content-Type" : "application/json"
}
)

print(resp.text)
Node.js
javascript
const https = require('https');

const data = JSON.stringify(
    {"query" : "mutation {
  refreshClusterManagementStats( nodeId: 3 )
    { reasonsNodeCannotBeSafelyUnregistered { isAlive, hasUnderReplicatedData } }
}"
}
);


const options = {
  hostname: '$YOUR_LOGSCALE_URL/graphql',
  path: '/graphql',
  port: 443,
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Content-Length': data.length,
    Authorization: 'BEARER ' + process.env.TOKEN,
    'User-Agent': 'Node',
  },
};

const req = https.request(options, (res) => {
  let data = '';
  console.log(`statusCode: ${res.statusCode}`);

  res.on('data', (d) => {
    data += d;
  });
  res.on('end', () => {
    console.log(JSON.parse(data).data);
  });
});

req.on('error', (error) => {
  console.error(error);
});

req.write(data);
req.end();

Returned Data Types

For RefreshClusterManagementStatsMutation, there is one parameter, but it has a few sub-parameters. A link to a table with those sub-parameters is in the description field here.

Table: RefreshClusterManagementStatsMutation

ParameterTypeRequiredDefaultStabilityDescription
Some arguments may be required, as indicated in the Required column. For some fields, this column indicates that a result will always be returned for this column.
Table last updated: Sep 23, 2024
reasonsNodeCannotBeSafelyUnregisteredReasonsNodeCannotBeSafelyUnregisteredyes PreviewThe reasons the node cannot be safely unregistered. See ReasonsNodeCannotBeSafelyUnregistered.