Create and manage notification channels

This document describes how to configure notification channels by using the Google Cloud console. Cloud Monitoring uses these channels to notify you, or your on-call team, when an alerting policy fires. When you create an alerting policy, you select who is notified by making selections from the list of configured notification channels. For example, you might configure alerting policies that monitor Compute Engine instances to publish a Pub/Sub topic and to notify the Slack channel for the on-call team.

For more information, see Notification latency and Notifications per incident.

This document describes how to use the Google Cloud console. If you use the Cloud Monitoring API, then see Create and manage notification channels by API.

Before you begin

To get the permissions that you need to view and configure notification channels by using the Google Cloud console, ask your administrator to grant you the Monitoring Editor (roles/monitoring.editor) IAM role on your project. For more information about granting roles, see Manage access to projects, folders, and organizations.

You might also be able to get the required permissions through custom roles or other predefined roles.

For more information about Cloud Monitoring roles, see Control access with Identity and Access Management.

Create a notification channel

When you are creating an alerting policy, you can select any configured notification channel and add it to your policy. You can pre-configure your notification channels, or you can configure them as part of the process of creating an alerting policy. For more information, see Create a channel on demand.

To create a notification channel by using the Google Cloud console, follow the channel-specific instructions contained in the following table:

Email

To add an email notification channel, do the following:

In the Google Cloud console, go to the Alerting page:
Go to Alerting

If you use the search bar to find this page, then select the result whose subheading is Monitoring.
Click Edit notification channels.
In the Email section, click Add new.
Enter a single email address and a description.
Click Save.

If you use a group email address as the notification channel for an alerting policy, then configure the group to accept mail from alerting-noreply@google.com.

You can create email channels during the creation of an alerting policy. For more information, see Create a channel on demand.

Mobile App

Use the Google Cloud console Mobile App to monitor your Google Cloud console resources and Monitoring information from anywhere. Google Cloud console Mobile App notifications are either sent to a specific device or to a specific user:

List of Google Cloud console Mobile App notification channels.

Device indicates that notifications are sent only to the specific device that created the notification channel. For device-scoped notification channels, the Display name field includes device information.
User indicates that the notifications are sent to all of your devices that have the Google Cloud console Mobile App installed.

Cloud Monitoring determines the notification scope when the channel is created. You can't select or change the scope.

To configure a Google Cloud console Mobile App notification channel for a specific Google Cloud project, do the following:

Install the Google Cloud console Mobile App from your mobile device's app store.
Select a project for viewing in the Google Cloud console Mobile App.

After you select a project, a data exchange between the app and the selected Google Cloud project occurs. A notification channel is created when one doesn't exist, and after a few minutes, this channel is listed under the Mobile Devices section of the Notification channels page.

To add your mobile device as a notification channel for an alerting policy, in the alerting Notifications section, select Google Cloud console (mobile) and then choose your mobile device from the list.

PagerDuty

PagerDuty supports two-way synchronization with Monitoring. As a result, the following are true:

If an incident is created in Monitoring, then an incident is opened in PagerDuty.
You can't use PagerDuty to close an incident in Monitoring.
If you resolve an incident in PagerDuty and if Monitoring has the incident open, then the incident is reopened in PagerDuty.

To set up PagerDuty notifications, do the following:

In your PagerDuty account, configure the integration in a new service or add the integration to an existing service.
1. Create an account or sign in to an existing account.
2. Go to the Services page.
3. On your service's Integrations panel, find the listing for your new integration, expand its menu, and then copy the integration key.
4. Optional: Configure PagerDuty to accurately map incident severity values from Monitoring.
In Cloud Monitoring, add the PagerDuty notification channel:
1. In the Google Cloud console, go to the Alerting page:
  Go to Alerting
  
  If you use the search bar to find this page, then select the result whose subheading is Monitoring.
2. Click Edit notification channels.
3. In the PagerDuty section, click Add new.
4. Enter the Display Name. This name should match the name of the PagerDuty service where you configured your new integration in Step 1.
5. Paste the integration key that you copied in Step 1 into the Service Key field.
6. Click Save.

When you create an alerting policy, select PagerDuty in the Notifications section and choose your PagerDuty configuration.

The JSON packet for PagerDuty has the following format:

 {
     "description": A string of various fields in the incident,
     "details": JSON payload with schema version 1.2.
 }

To view an example and the schema for the details field, expand the following sections.

JSON examples

By default, the alerting backend attempts to generate a JSON packet with version 1.2 formatting. For more information about this formatting, see the next section.

The following is an example of such a packet:


{
  "incident": {
    "incident_id": "0.opqiw61fsv7p",
    "scoping_project_id": "internal-project",
    "scoping_project_number": 12345,
    "url": "https://console.cloud.google.com/monitoring/alerting/incidents/0.lxfiw61fsv7p?project=internal-project",
    "severity": "no severity",
    "started_at": 1577840461,
    "ended_at": 1577877071,
    "state": "closed",
    "resource_id": "11223344",
    "resource_name": "internal-project gke-cluster-1-default-pool-e2df4cbd-dgp3",
    "resource_display_name": "gke-cluster-1-default-pool-e2df4cbd-dgp3",
    "resource_type_display_name": "VM Instance",
    "resource": {
      "type": "gce_instance",
      "labels": {
        "instance_id": "11223344",
        "project_id": "internal-project",
        "zone": "us-central1-c"
      }
    },
    "metric": {
      "type": "compute.googleapis.com/instance/cpu/utilization",
      "displayName": "CPU utilization",
      "labels": {
        "instance_name": "the name of the VM instance"
      }
    },
    "metadata": {
      "system_labels": { "labelkey": "labelvalue" },
      "user_labels": { "labelkey": "labelvalue" }
    },
    "policy_name": "Monitor-Project-Cluster",
    "policy_user_labels" : {
        "user-label-1" : "important label",
        "user-label-2" : "another label"
    },
    "condition_name": "VM Instance - CPU utilization [MAX]",
    "threshold_value": "0.9",
    "observed_value": "0.835",
    "condition": {
      "name": "projects/internal-project/alertPolicies/1234567890123456789/conditions/1234567890123456789",
      "displayName": "VM Instance - CPU utilization [MAX]",
      "conditionThreshold": {
        "filter": "metric.type=\"compute.googleapis.com/instance/cpu/utilization\" resource.type=\"gce_instance\" metadata.system_labels.\"state\"=\"ACTIVE\"",
        "aggregations": [
          {
            "alignmentPeriod": "120s",
            "perSeriesAligner": "ALIGN_MEAN"
          }
        ],
        "comparison": "COMPARISON_GT",
        "thresholdValue": 0.9,
        "duration": "0s",
        "trigger": {
          "count": 1
        }
      }
    },
    "documentation": {
      "content": "TEST ALERT\n\npolicy.name=projects/internal-project/alertPolicies/1234567890123456789\n\npolicy.display_name=Monitored-Project-NO-GROUPBY\n\ncondition.name=projects/nternal-project/alertPolicies/1234567890123456789/conditions/1234567890123456789\n\ncondition.display_name=VM Instance - CPU utilization [MAX]\n\nproject=internal-project\n\nresrouce.project=internal-project \n\nDONE\n",
      "mime_type": "text/markdown",
      "subject": "ALERT - No severity",
      "links": [
        {
          "displayName": "Playbook",
          "url": "https://myownpersonaldomain.com/playbook?name=${resource.name}"
        }
      ]
    },
    "summary": "CPU utilization for internal-project gke-cluster-1-16-default-pool-e2df4cbd-dgp3 with metric labels {instance_name=gke-cluster-1-default-pool-e2df4cbd-dgp3} and system labels {state=ACTIVE} returned to normal with a value of 0.835."
  },
  "version": "1.2"
}

Schema structure, version 1.2

This section describes version 1.2 of the payload schema. Some fields might not appear in all returned packets or might have empty values, depending on the configuration of the alerting policy, the state of the incident, or the resource being monitored. Some fields take embedded structures as values; these structures are described by reference because their contents can also vary.

In a returned packet, the fields can occur in any order. In the description that follows, they are organized into related groups.

{
  "version": "1.2",
  "incident": {

    Information about the incident.

    "incident_id": string, generated ID for this incident.
    "scoping_project_id": string, the project ID that hosts the metrics scope.
    "scoping_project_number": number, the project number of the scoping project.
    "url": string, Google Cloud console URL for this incident.
    "started_at": number, time (in Unix epoch seconds) when the incident was opened.
    "ended_at": number, time (in Unix epoch seconds) when the incident was closed. Populated only when state is closed.
    "state": string, state of the incident: open or closed. If open, then ended_at is null.
    "summary": string, generated textual summary of the incident.
    "apigee_url": string, Apigee URL for this incident, only for Apigee resource types Environment and Proxy*.
    "observed_value": string, observed value that triggered/resolved the alert, may be empty if the condition is expired.

    Information about the monitored resource for which the incident was opened.

    "resource": {
      "type": string, identifier of the monitored resource type being alerted on, for example, gce_instance; see List of monitored resources.
      "labels": object, key-value pairs for labels associated with the monitored resource.
    },
    "resource_type_display_name": string, display name of the monitored resource type.
    "resource_id": string, instance ID of the monitored resource, same value as resource.labels.instance_id.
    "resource_display_name": string, display name of the monitored resource.
    "resource_name": string, generated name of this monitored resource; consists of values from other fields.

    Information about the metric type of the time-series data.

    "metric": {
      "type": string, identifier of the metric type being alerted on, for example, compute.googleapis.com/instance/cpu/utilization; see List of metrics.
      "displayName": string, display name of the metric type.
      "labels": object, key-value pairs for labels associated with the metric.
    },
    "metadata": {
      "system_labels": object, key-value pairs for system metadata labels.
      "user_labels": object, key-value pairs for user metadata labels.
    },

    Information about the alerting policy and condition that opened/resolved the incident.
    The values are drawn from the relevant AlertPolicy object.

    "policy_name": string, display name for the alerting policy.
    "policy_user_labels": object, key-value pairs for any user labels attached to the policy.
    "documentation": object, an embedded structure of the form Documentation.
    "condition": object, an embedded structure of the form Condition.
    "condition_name": string, display name of the condition, same value as condition.displayName.
    "severity": string, severity level of incidents. If this field isn't defined during alerting policy creation, then Cloud Monitoring sets the alerting policy severity to no severity.
    "threshold_value": string, the threshold value of this condition, may be empty if the condition isn't a threshold condition.
  },
}

Deprecation policy

The payload schema is subject to the Google Cloud deprecation policy outlined in Section 1.4(d) of the Google Cloud Platform Terms of Service. Note that the schema does not control the formats of generated field values, and these formats can change without notice. For example, incident.summary, incident.documentation.content, and incident.url are meant to include data pertaining to their fields, but the schema doesn't have constraints to guarantee accurate parsing of these fields. You can consume the value as a whole and expect that it adheres to the deprecation policy, but don't rely on parsing the generated fields.

Configure PagerDuty to map severity levels

By default, PagerDuty notifications show all incident severity levels as "critical". You can configure event orchestration rules in PagerDuty so that the PagerDuty alert severity matches the Monitoring incident severity:

In your PagerDuty account, go to the Services page.
Select the PagerDuty service where you receive Google Cloud notifications.
Click Settings.
Go to the Event Management section and then click View Orchestration Rules.
Click New Rule.
For each Monitoring severity value that you want to convert, create a conditional rule that maps the severity value to an equivalent PagerDuty value:
1. In the menu under Step 1: When should this rule be applied?, select If events match certain conditions.
2. Select the code editor.
3. In the If section, enter event.custom_details.incident.severity matches part 'VALUE', where VALUE is the name of a Monitoring severity value, then click Next.
4. Under Step 2: What action(s) should be applied, select Alert Data.
5. Set the alert severity to a value that matches the Monitoring value that you entered in Step C, then save your changes.
Optional: To add additional rules, click Else rule.

SMS

To configure SMS notifications, do the following:

In the Google Cloud console, go to the Alerting page:
Go to Alerting

If you use the search bar to find this page, then select the result whose subheading is Monitoring.
Click Edit notification channels.
In the SMS section, click Add new.
Complete the dialog and click Save.

When you set up your alerting policy, select the SMS notification type and choose a verified phone number from the list.

Slack

The Monitoring Slack integration allows your alerting policies to post to a Slack channel when a new incident is created. To set up Slack notifications, do the following:

In Slack: Create a Slack workspace and channel at the Slack site. Record the channel URL.
In the Google Cloud console, go to the Alerting page:
Go to Alerting

If you use the search bar to find this page, then select the result whose subheading is Monitoring.
Click Edit notification channels.
In the Slack section, click Add new to open the Slack sign-in page:
1. Select your Slack workspace.
2. Click Allow to enable Cloud Monitoring access to your Slack workspace. This action takes you back to the Monitoring configuration page for your notification channel.
3. In the Slack Channel Name field, enter the name of the Slack channel you want to use for notifications.
4. In the Cloud Alerting Display Name field, enter a short descriptive statement. Monitoring displays the value of this field on the Notifications channel page.
5. (Optional) To test the connection between Cloud Monitoring and your Slack workspace, click Send test notification. If the connection is successful, then you see a message This is a test alert notification... in the Slack notification channel that you specified. Check the notification channel to confirm receipt.
If the Slack channel you want to use for notifications is a private channel, then you must manually invite the Monitoring app to the channel:
1. Open Slack.
2. Go to the channel you specified as your Monitoring notification channel.
3. Invite the Monitoring app to the channel by entering and sending the following message in the channel:
```
/invite @Google Cloud Monitoring
```
  Be sure you invite the Monitoring app to the private channel you specified when creating the notification channel in Monitoring. Inviting the Monitoring app to public channels is optional.
When you create an alerting policy, select Slack in the Notifications section and choose your Slack configuration.

Webhooks

Before you configure a Webhook notification channel, consider the following:

Webhooks only support public endpoints. If you need notifications sent to an endpoint that isn't public, then create a Pub/Sub notification channel and configure a subscription to the Pub/Sub topic. For more information, see Webhook notifications fail when configured for a private endpoint.
If a Cloud Run function is configured as webhook endpoint for a notification channel, then make sure the user invoking the function has the required authentication permission. For more information, see Authenticate for invocation and Enabling access to a function.
Webhook notification channels aren't compatible with Microsoft Teams. To send notification data from Monitoring to Microsoft Teams, create an integration layer to receive the Monitoring webhook and then reroute it to Microsoft Teams.

Configure Webhook notification channels

To configure Webhooks notifications, do the following:

The webhook handler: Identify the public endpoint URL to receive webhook data from Monitoring.
In the Google Cloud console, go to the Alerting page:
Go to Alerting

If you use the search bar to find this page, then select the result whose subheading is Monitoring.
Click Edit notification channels.
In the Webhook section, click Add new.
Complete the dialog.
Click Test Connection to send a test payload to the Webhook endpoint. You can go to the receiving endpoint to verify delivery.
Click Save.

When you create an alerting policy, select Webhook in the Notifications section and choose your webhook configuration. The notifications sent by Error Reporting follow the 1.0 schema while notifications sent by Monitoring follow the 1.2 schema:

JSON examples

By default, the alerting backend attempts to generate a JSON packet with version 1.2 formatting. For more information about this formatting, see the next section.

The following is an example of such a packet:


{
  "incident": {
    "incident_id": "0.opqiw61fsv7p",
    "scoping_project_id": "internal-project",
    "scoping_project_number": 12345,
    "url": "https://console.cloud.google.com/monitoring/alerting/incidents/0.lxfiw61fsv7p?project=internal-project",
    "severity": "no severity",
    "started_at": 1577840461,
    "ended_at": 1577877071,
    "state": "closed",
    "resource_id": "11223344",
    "resource_name": "internal-project gke-cluster-1-default-pool-e2df4cbd-dgp3",
    "resource_display_name": "gke-cluster-1-default-pool-e2df4cbd-dgp3",
    "resource_type_display_name": "VM Instance",
    "resource": {
      "type": "gce_instance",
      "labels": {
        "instance_id": "11223344",
        "project_id": "internal-project",
        "zone": "us-central1-c"
      }
    },
    "metric": {
      "type": "compute.googleapis.com/instance/cpu/utilization",
      "displayName": "CPU utilization",
      "labels": {
        "instance_name": "the name of the VM instance"
      }
    },
    "metadata": {
      "system_labels": { "labelkey": "labelvalue" },
      "user_labels": { "labelkey": "labelvalue" }
    },
    "policy_name": "Monitor-Project-Cluster",
    "policy_user_labels" : {
        "user-label-1" : "important label",
        "user-label-2" : "another label"
    },
    "condition_name": "VM Instance - CPU utilization [MAX]",
    "threshold_value": "0.9",
    "observed_value": "0.835",
    "condition": {
      "name": "projects/internal-project/alertPolicies/1234567890123456789/conditions/1234567890123456789",
      "displayName": "VM Instance - CPU utilization [MAX]",
      "conditionThreshold": {
        "filter": "metric.type=\"compute.googleapis.com/instance/cpu/utilization\" resource.type=\"gce_instance\" metadata.system_labels.\"state\"=\"ACTIVE\"",
        "aggregations": [
          {
            "alignmentPeriod": "120s",
            "perSeriesAligner": "ALIGN_MEAN"
          }
        ],
        "comparison": "COMPARISON_GT",
        "thresholdValue": 0.9,
        "duration": "0s",
        "trigger": {
          "count": 1
        }
      }
    },
    "documentation": {
      "content": "TEST ALERT\n\npolicy.name=projects/internal-project/alertPolicies/1234567890123456789\n\npolicy.display_name=Monitored-Project-NO-GROUPBY\n\ncondition.name=projects/nternal-project/alertPolicies/1234567890123456789/conditions/1234567890123456789\n\ncondition.display_name=VM Instance - CPU utilization [MAX]\n\nproject=internal-project\n\nresrouce.project=internal-project \n\nDONE\n",
      "mime_type": "text/markdown",
      "subject": "ALERT - No severity",
      "links": [
        {
          "displayName": "Playbook",
          "url": "https://myownpersonaldomain.com/playbook?name=${resource.name}"
        }
      ]
    },
    "summary": "CPU utilization for internal-project gke-cluster-1-16-default-pool-e2df4cbd-dgp3 with metric labels {instance_name=gke-cluster-1-default-pool-e2df4cbd-dgp3} and system labels {state=ACTIVE} returned to normal with a value of 0.835."
  },
  "version": "1.2"
}

Schema structure, version 1.2

In a returned packet, the fields can occur in any order. In the description that follows, they are organized into related groups.

Basic authentication

In addition to the webhook request sent by Cloud Monitoring, basic authentication utilizes the HTTP specification for the username and password. Cloud Monitoring requires your server to return a 401 response with the proper WWW-Authenticate header. For more information about basic authentication, see the following:

Token authentication

Token Authentication requires a query string parameter in the endpoint URL and a key that the server expects to be secret between itself and Monitoring. The following is a sample URL that includes a token:

https://www.myserver.com/stackdriver-hook?auth_token=1234-abcd

If Monitoring posts an incident to the endpoint URL, your server can validate the attached token. This method of authentication is most effective when used with SSL/TLS to encrypt the HTTP request preventing snoopers from learning the token.

For an example server in Python, see this sample server.

Deprecation policy

Pub/Sub

This section describes how to configure Pub/Sub notification channels. For redundancy, we recommend that you create multiple notification channels. Pairing Pub/Sub with Google Cloud console Mobile App, PagerDuty, Webhooks, or Slack is recommended, because Pub/Sub uses a different delivery mechanism.

To configure a Pub/Sub notification channel:

Enable required APIs and create a topic
Configure the notification channel for a topic
Authorize a service account
Set the notification channel in an alerting policy

To understand the data schema, see Schema example.

To receive the alert notifications, you must also create one of the following subscriptions: pull, push, or BigQuery.

When the subscription is in a different project than the topic, create a service account in the subscriber project, and grant it the role of roles/pubsub.subscriber.

Before you begin

When you add the first Pub/Sub notification channel to a Google Cloud project, Cloud Monitoring creates a service account for that project. It also grants the Identity and Access Management role Monitoring Notification Service Agent to the service account. This service account lets Monitoring send notifications to Pub/Sub-based notification channels in this project.

The service account has the following format:

service-PROJECT_NUMBER@gcp-sa-monitoring-notification.iam.gserviceaccount.com

The name of the notifications service account includes a unique Google Cloud project number. You can find the project name, ID, and number on the project's dashboard in the Google Cloud console, or you can retrieve it with the following command:

gcloud projects describe PROJECT_ID --format="value(project_number)"

You can view and edit the service account by using the Google Cloud console or the Google Cloud CLI.

Enable required APIs and create a topic

In the Google Cloud project where you plan to create the notification channel and Pub/Sub topic, do the following:

Sign in to your Google Cloud account. If you're new to Google Cloud, create an account to evaluate how our products perform in real-world scenarios. New customers also get $300 in free credits to run, test, and deploy workloads.

In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

Go to project selector

Make sure that billing is enabled for your Google Cloud project.

Enable the Pub/Sub and Cloud Monitoring APIs.

Enable the APIs

In the Google Cloud console, on the project selector page, select or create a Google Cloud project.

Go to project selector

Make sure that billing is enabled for your Google Cloud project.

Enable the Pub/Sub and Cloud Monitoring APIs.

Enable the APIs

Create a Pub/Sub topic. For information about how to create a topic, see Create a topic. For example, to create a topic called notificationTopic by using the Google Cloud CLI, run the following command:
```
gcloud pubsub topics create notificationTopic
```

Next, configure your Pub/Sub notification channels.

Configure notifications for a topic

To create a Pub/Sub notification channel, you can use the Monitoring API, the Google Cloud CLI, or the Google Cloud console. After you create the notification channel, authorize the notifications service account to publish each topic that you are using as a notification channel.

For information about using the Monitoring API or the Google Cloud CLI to create the notification channel, see Creating channels.

To use the Google Cloud console to create the notification channel, do the following:

In the Google Cloud console, go to the Alerting page:
Go to Alerting

If you use the search bar to find this page, then select the result whose subheading is Monitoring.
Select the Google Cloud project that contains the Pub/Sub topic you created.
Click Edit notification channels.
In the Pub/Sub section, click Add new.

The Created Pub/Sub Channel dialog displays the name of the service account that Monitoring created.
Authorize the service account. Your service account can publish all topics or specific topics:
- To publish all topics, select Manage roles, and add the role of Pub/Sub Publisher.
  
  After you complete these steps that configure the notification channel, skip the next section, which is titled Authorize service account, and proceed to Set the notification channel in an alerting policy.
- To publish specific topics, proceed to the next step and authorize the service account to publish specific topics after you complete configuring the notification channel. For instructions to authorize the service account, see Authorize service account.
Enter a display name for your channel and the Pub/Sub topic name.
(Optional) To verify that the channel is correctly configured, click Send test notification.
Select Add channel.

Next, authorize the service account.

Authorize service account

Authorization lets the notifications service account publish each Pub/Sub topic that you are using as a notification channel. This section describes how you can do the following:

Authorize a service account for a specific topic.
Authorize a service account for all topics.

Authorize a service account for a specific topic

You can authorize a service account to publish a specific topic by using the Google Cloud console and the Google Cloud CLI. This section describes both approaches.

To authorize your service account for a specific topic by using the Google Cloud console, do the following:

In the Google Cloud console, go to the Topics page:
Go to Topics

If you use the search bar to find this page, then select the result whose subheading is Pub/Sub.
Select the topic.
In the Permissions tab, select Add principal.
In the New principal field, enter the name of the notifications service account. The service account has the following naming convention:
```
service-PROJECT_NUMBER@gcp-sa-monitoring-notification.iam.gserviceaccount.com
```
Select the role Pub/Sub Publisher, and then select Save.

To authorize your service account for a specific topic by using the Google Cloud CLI, grant the pubsub.publisher IAM role for the topic to the service account. For example, the following command configures the IAM role for the notificationTopic topic:

gcloud pubsub topics add-iam-policy-binding \
projects/PROJECT_NUMBER/topics/notificationTopic --role=roles/pubsub.publisher \
--member=serviceAccount:service-PROJECT_NUMBER@gcp-sa-monitoring-notification.iam.gserviceaccount.com

A response to a successful execution of the add-iam-policy-binding command is like the following:

 Updated IAM policy for topic [notificationTopic].
 bindings:
 ‐ members:
    ‐ serviceAccount:service-PROJECT_NUMBER@gcp-sa-monitoring-notification.iam.gserviceaccount.com
    role: roles/pubsub.publisher
 etag: BwWcDOIw1Pc=
 version: 1

For more information, see the pubsub topics add-iam-policy-binding reference page.

Authorize a service account for all topics

To authorize your service account for all topics, do the following:

In the Google Cloud console, go to the IAM page:
Go to IAM

If you use the search bar to find this page, then select the result whose subheading is IAM & Admin.
Select Include Google-provided role grants as shown in the following image:
Search for the service account that has the following format:
```
service-PROJECT_NUMBER@gcp-sa-monitoring-notification.iam.gserviceaccount.com
```
Reload the page when the service account isn't listed.
Select Edit for the notifications service account, select Add another role, and then add the role Pub/Sub Publisher.

Next, set the notification channel in an alerting policy.

Set the notification channel in an alerting policy

To use a Pub/Sub notification channel in an alerting policy, select Pub/Sub as the channel type, and then select the topic.

Schema example

To view an example JSON packet and the schema, expand the following sections.

JSON examples

By default, the alerting backend attempts to generate a JSON packet with version 1.2 formatting. For more information about this formatting, see the next section.

The following is an example of such a packet:


{
  "incident": {
    "incident_id": "0.opqiw61fsv7p",
    "scoping_project_id": "internal-project",
    "scoping_project_number": 12345,
    "url": "https://console.cloud.google.com/monitoring/alerting/incidents/0.lxfiw61fsv7p?project=internal-project",
    "severity": "no severity",
    "started_at": 1577840461,
    "ended_at": 1577877071,
    "state": "closed",
    "resource_id": "11223344",
    "resource_name": "internal-project gke-cluster-1-default-pool-e2df4cbd-dgp3",
    "resource_display_name": "gke-cluster-1-default-pool-e2df4cbd-dgp3",
    "resource_type_display_name": "VM Instance",
    "resource": {
      "type": "gce_instance",
      "labels": {
        "instance_id": "11223344",
        "project_id": "internal-project",
        "zone": "us-central1-c"
      }
    },
    "metric": {
      "type": "compute.googleapis.com/instance/cpu/utilization",
      "displayName": "CPU utilization",
      "labels": {
        "instance_name": "the name of the VM instance"
      }
    },
    "metadata": {
      "system_labels": { "labelkey": "labelvalue" },
      "user_labels": { "labelkey": "labelvalue" }
    },
    "policy_name": "Monitor-Project-Cluster",
    "policy_user_labels" : {
        "user-label-1" : "important label",
        "user-label-2" : "another label"
    },
    "condition_name": "VM Instance - CPU utilization [MAX]",
    "threshold_value": "0.9",
    "observed_value": "0.835",
    "condition": {
      "name": "projects/internal-project/alertPolicies/1234567890123456789/conditions/1234567890123456789",
      "displayName": "VM Instance - CPU utilization [MAX]",
      "conditionThreshold": {
        "filter": "metric.type=\"compute.googleapis.com/instance/cpu/utilization\" resource.type=\"gce_instance\" metadata.system_labels.\"state\"=\"ACTIVE\"",
        "aggregations": [
          {
            "alignmentPeriod": "120s",
            "perSeriesAligner": "ALIGN_MEAN"
          }
        ],
        "comparison": "COMPARISON_GT",
        "thresholdValue": 0.9,
        "duration": "0s",
        "trigger": {
          "count": 1
        }
      }
    },
    "documentation": {
      "content": "TEST ALERT\n\npolicy.name=projects/internal-project/alertPolicies/1234567890123456789\n\npolicy.display_name=Monitored-Project-NO-GROUPBY\n\ncondition.name=projects/nternal-project/alertPolicies/1234567890123456789/conditions/1234567890123456789\n\ncondition.display_name=VM Instance - CPU utilization [MAX]\n\nproject=internal-project\n\nresrouce.project=internal-project \n\nDONE\n",
      "mime_type": "text/markdown",
      "subject": "ALERT - No severity",
      "links": [
        {
          "displayName": "Playbook",
          "url": "https://myownpersonaldomain.com/playbook?name=${resource.name}"
        }
      ]
    },
    "summary": "CPU utilization for internal-project gke-cluster-1-16-default-pool-e2df4cbd-dgp3 with metric labels {instance_name=gke-cluster-1-default-pool-e2df4cbd-dgp3} and system labels {state=ACTIVE} returned to normal with a value of 0.835."
  },
  "version": "1.2"
}

Schema structure, version 1.2

In a returned packet, the fields can occur in any order. In the description that follows, they are organized into related groups.

Deprecation policy

Google Chat

The Google Cloud Monitoring app allows your Google Chat spaces to receive notifications.

Before you begin

If you are in an organization, then to install the Google Cloud Monitoring app, you must have access to the Google Cloud Monitoring app. If you don't have access, then request that a Google Workspace administrator do the following:

Install the Google Cloud Monitoring app

You must use the following procedure to install the Google Cloud Monitoring app. Installation from the Google Workspace Marketplace listing isn't supported.

To install the app and configure a space as a notification channel, do the following:

In Google Chat, open or create the space where you want to receive notifications.
Install the Google Cloud Monitoring app:
1. Select your space name and then select Apps and Integrations.
2. If the Google Cloud Monitoring app doesn't appear in the Apps list, then return to your space, enter @Google Cloud Monitoring, and then press Enter.
3. Click Add to space.
Copy the chat space ID to your clipboard.

If you installed the Google Cloud Monitoring app, then the chat space ID is included in the installation confirmation. Otherwise, you can find the chat space ID as the series of numbers and letters following space/ at the end of your chat space URL.
Open a new browser tab and then configure the notification channel:
1. In the Google Cloud console, go to the Alerting page:
  Go to Alerting
  
  If you use the search bar to find this page, then select the result whose subheading is Monitoring.
2. Click Edit notification channels.
3. Go to the Google Chat section and click Add New.
4. Enter your chat space ID in the Chat Space ID field and then click Save.

Create a channel on demand

When adding a notification channel to an alerting policy, you must select a channel from a list. To update the list of options when you are creating an alerting policy, use the following process:

In the notification dialog, click Manage Notification Channels. You're taken to the Notification channels window in a new browser tab.
To add a new notification channel, locate the channel type, click Add new, and then follow the channel-specific instructions contained in the previous table.
Return to the original tab, and in the notification dialog, click Refresh.
Select the notification channel from the updated list.

Get notified on an unsupported channel

If your preferred notification channel isn't supported, consider creating a pipeline that relies on sending your notifications to Pub/Sub. For a Python example that uses Flask, see Creating custom notifications with Cloud Monitoring and Cloud Run. For other examples, see the cloud-alerting-notification-forwarding Git repository.

Test a notification channel

Cloud Monitoring doesn't support a test option for notification channels. However, you can verify that a notification channel is properly configured by creating an alerting policy and configuring the condition to be met.

To manually test your notification channels, you could create an alerting policy that monitors the CPU utilization of one of your virtual machine (VM) instances:

Optional: If you don't have a VM in your Google Cloud project yet or want to use a different VM for testing, then create a VM:
1. In the Google Cloud console, go to the VM instances page:
  Go to VM instances
  
  If you use the search bar to find this page, then select the result whose subheading is Compute Engine.
2. Select Create instance, and then configure your VM. For more information about creating VMs, see Create a VM instance from a public image.
In the Google Cloud console, go to the Alerting page:
Go to Alerting

If you use the search bar to find this page, then select the result whose subheading is Monitoring.
Select Create policy.
Use the Select a metric menu to select the CPU Utilization metric for a VM instance.
Click Add filter, and add a filter for your VM.
Update the Configure trigger fields as follows:
1. Select Below threshold for the Threshold position field.
2. Select a value that is larger than the CPU utilization for your instance. For example, if the chart displays the CPU utilization to be about 5%, then set the threshold to 10%.
  
  These settings configure the condition to be met when the CPU utilization of a VM instance is less than the specified threshold. Because you selected the threshold to be larger than the CPU utilization of your VM instance, the condition of the alerting policy is met.
Add the notification channels to your policy.
Expand Incident autoclose duration and select 30 min.
Enter a policy name and click Create policy.
After the condition is met, verify that you received a notification on each notification channel.
Delete the alerting policy. The incident is closed automatically after the autoclose duration expires.
If you created a VM instance for this test, then delete it.

If you aren't receiving expected notifications, then you can search the Logs Explorer for log entries with information about the missing notifications. For more information, see Notifications aren't received.

Edit and delete notification channels

To edit or delete a notification channel by using the Google Cloud console, do the following:

In the Google Cloud console, go to the Alerting page:
Go to Alerting

If you use the search bar to find this page, then select the result whose subheading is Monitoring.
Click Edit notification channels.

The Notification channels dashboard contains a section for each type of notification channel. Each section lists all configurations for that type:
- To modify an entry, click Edit. Click Save after your changes are complete.
- To delete an entry, click Delete. Click Delete in the confirmation dialog.

View notification channel logs

You can use the Logs Explorer to view notification channel errors:

In the Google Cloud console, go to the Logs Explorer page:
Go to Logs Explorer

If you use the search bar to find this page, then select the result whose subheading is Logging.
Enter and run your query. For queries specific to notification channel errors, see Cloud Monitoring queries.

What's next

For information about incidents, see the following documents: