Enabling and disabling high availability on an instance

MySQL | PostgreSQL

This page describes how to configure a PostgreSQL instance for high availability.

You can configure an instance for high availability when you create the instance, or you can enable high availability on an existing instance.

For more information about the high availability configuration, see Overview of the High Availability Configuration.

Creating a new instance configured for high availability

When you create a PostgreSQL instance, and you configure it for high availability, Cloud SQL creates the instance as a regional instance.

To create an instance configured for high availability:

Console

Go to the Cloud SQL Instances page in the Google Cloud Platform Console.
Go to the Cloud SQL Instances page
Create a Second Generation instance.
On the Instance ID page, select Show configuration options.
Open Enable auto backups and high availability.
Select the High availability (regional) checkbox.
Leave the Automate backups and Enable binary logging checkboxes enabled.

gcloud

Create the regional instance:

gcloud beta sql instances create [REGIONAL_INSTANCE_NAME] \
                                 --availability-type=REGIONAL \
                                 --database-version=POSTGRES_9_6 \
                                 --cpu=[NUMBER_CPUS] --memory=[MEMORY_SIZE]

Configure the root user:

gcloud sql users set-password postgres no-host \
                      --instance=[REGIONAL_INSTANCE_NAME] --password=[PASSWORD]

For a complete list of available parameters, see the gcloud beta sql instances create reference page.

cURL

Create the regional instance:

gcloud auth application-default login
ACCESS_TOKEN="$(gcloud auth application-default print-access-token)"
curl --header "Authorization: Bearer ${ACCESS_TOKEN}" \
     --header 'Content-Type: application/json' \
     --data '{"name":"[INSTANCE_NAME]", "region":"[REGION]",
              "databaseVersion":"POSTGRES_9_6",
              "settings": {
                  "tier":"[MACHINE_TYPE]",
                  "availabilityType":"REGIONAL"}}' \
     -X POST \
     https://www.googleapis.com/sql/v1beta4/projects/[PROJECT-ID]/instances

For the complete list of parameters for this request, see the instances:insert page.

When the instance finishes initializing, update the password for the postgres user:

curl --header "Authorization: Bearer ${ACCESS_TOKEN}" \
     --header 'Content-Type: application/json' \
     --data '{"name": "postgres", "host": "nohost", "password": "[PASSWORD]"}' \
     'https://www.googleapis.com/sql/v1beta4/projects/[PROJECT-ID]/instances/[INSTANCE_NAME]/users?name=postgres'

For more details about creating an instance, see Creating Instances.

Configuring an existing instance for high availability

Console

Configuring an existing instance for high availability causes a few minutes of downtime while the instance is reconfigured.

To configure an existing instance for high availability:

Go to the Cloud SQL Instances page in the Google Cloud Platform Console.
Go to the Cloud SQL Instances page
Click the instance name to open its Overview page and click Edit in the button bar.
Under the Enable auto backups and high availability configuration option section, select the High availability (regional) checkbox.
Click Save.
You are returned to the instance page for the master while the instance is updated.

gcloud

Update the instance to be regional:

gcloud beta sql instances patch [INSTANCE_NAME] --availability-type REGIONAL

cURL

Configuring an existing instance for high availability causes a few minutes of downtime while the instance is reconfigured.

Update the instance to be a regional instance:

curl --header "Authorization: Bearer ${ACCESS_TOKEN}" \
     --header 'Content-Type: application/json' \
     --data '{"settings": {"availabilityType":"REGIONAL"}}' \
     -X PATCH \
     https://www.googleapis.com/sql/v1beta4/projects/[PROJECT-ID]/instances/[INSTANCE_NAME]

Initiating failover

Testing failover is optional, but is recommended so that you can see how your application responds in the event of a failover.

Console

Go to the Cloud SQL Instances page in the Google Cloud Platform Console.
Go to the Cloud SQL Instances page
Click the master instance name to open its Instance details page.
Click Failover in the button bar.

gcloud

Initiate the failover:

gcloud sql instances failover [MASTER_INSTANCE_NAME]

cURL

Describe the master instance to get the value of the `settingsVersion` field.

gcloud auth application-default login
ACCESS_TOKEN="$(gcloud auth application-default print-access-token)"
curl --header "Authorization: Bearer ${ACCESS_TOKEN}" \
     -X GET \
     https://www.googleapis.com/sql/v1beta4/projects/[PROJECT-ID]/instances/[MASTER_INSTANCE_NAME]

Initiate the failover:

curl --header "Authorization: Bearer ${ACCESS_TOKEN}" \
     --header 'Content-Type: application/json' \
     --data '{"failoverContext":{"settingsVersion":"[SETTINGS_VERSION]"}}' \
          -X POST \
     https://www.googleapis.com/sql/v1beta4/projects/[PROJECT-ID]/instances/[MASTER_INSTANCE_NAME]/failover

The instance fails over and is not available to serve data for a few minutes.

Disabling high availability on an instance

Before you perform this procedure, make sure there are no operations currently running on the instance.

To disable high availability:

Console

Go to the Cloud SQL Instances page in the Google Cloud Platform Console.
Go to the Cloud SQL Instances page
Select the instance you want to disable high availability on.
On the Instance details page, click EDIT.
Open Enable auto backups.
Under Availability click Single zone.
Click Save. This edit requires a restart of the instance. When you see the message box, click SAVE AND RESTART

gcloud

For reference information, see gcloud sql instances patch.

gcloud beta sql instances patch [INSTANCE_NAME] --availability-type ZONAL

cURL

The following request uses the instances:patch method to change the availability type on the instance to ZONAL.

curl --header "Authorization: Bearer ${ACCESS_TOKEN}" \
     --header 'Content-Type: application/json' \
     --data '{"settings": {"availabilityType":"ZONAL"}}' \
     -X PATCH \
     https://www.googleapis.com/sql/v1beta4/projects/[PROJECT-ID]/instances/[INSTANCE_NAME]

What's next

Learn more about how the high availability configuration works.
Test how your application responds to lost connections by restarting your instance.
Learn more about managing your database connections.
Create read replicas for your instance.
Learn more about Stackdriver Monitoring.

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Last updated June 13, 2019.

Enabling and disabling high availability on an instance

Creating a new instance configured for high availability

Console

gcloud

cURL

Configuring an existing instance for high availability

Console

gcloud

cURL

Initiating failover

Console

gcloud

cURL

Disabling high availability on an instance

Console

gcloud

cURL

What's next

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