Start a Database
This article explains how to start a database.
This procedure can be carried out using the Administration API or ConfD.
Prerequisites
The database must be stopped. For more information, see Stop a Database.
Procedure - Administration API
The following examples use curl in a Linux terminal to send REST calls to endpoints in the Administration API. You can also use other interfaces and languages to interact with the API. For more information, see Administration API.
Placeholder values are styled as Bash variables, for example: $NODE_IP
. Replace the placeholders with your own values.
The option --insecure
or -k
tells curl to bypass the TLS certificate check. This option allows you to connect to a HTTPS server that does not have a valid certificate. Only use this option if certificate verification is not possible and you trust the server.
-
To get the database name, send a
GET
request to the/api/v1/databases
endpoint.curl --insecure -X "GET" \
"https://$NODE_IP:4444/api/v1/databases" \
-H "accept: application/json" \
-H "Authorization: Basic $AUTH_TOKEN"The response will include the database ID and name. For example:
-
To start the database, send a
PUT
request to the/api/v1/databases/DATABASE_ID/start
endpoint. -
To verify that the database is running, send a
GET
request to the/api/v1/databases
endpoint.If the value for
running
in the response is greater than 0, the database is running. For example:[
{
"id": "MY_DATABASE",
"name": "MY_DATABASE",
"provider": "unknown",
"version": "8.23.1",
"ram": 22376,
"auditing": true,
"clusters": {
"total": 1,
"running": 1
...
Procedure - ConfD
The following examples use ConfD through the command-line tool confd_client, which is available on all database nodes. For more information, see ConfD.
-
Connect to EXAClusterOS (COS) on the cluster using
c4 connect -t <DEPLOYMENT>[.<NODE>]/cos
. For example:If you do not specify a node, c4 will connect to the first active node in the deployment.
For more information about how to use
c4 connect
, see How to use c4. -
To find the name of the database, use the ConfD job db_list. For example:
-
To start the database, use the ConfD job db_start. For example:
-
To verify that the database is running, use the ConfD job db_state. For example: