1.3. Managing cluster alerts

1. Filtering alerts by their names.
2. Filtering the alerts by their states. To fire, some alerts need a certain condition to be true for the duration of a timeout. If a condition of an alert is currently true, but the timeout has not been reached, such an alert is in the Pending state.
3. Alert name.
4. Description of an alert.
5. Value of the Severity label of the alert.
6. Current state of the alert and when the alert went into this state.
7. Actions you can do with the alert.

1. Creating a silence for an alert.
2. Filtering silences by their name.
3. Filtering silences by their states. If a silence is pending, it is currently not active because it is scheduled to start at a later time. If a silence expired, it is no longer active because it has reached its end time.
4. Description of a silence. It includes the silence name and the specification of alerts that it matches.
5. Number of alerts that are being silenced by the silence.
6. Current state of the silence. For active silences, it shows when the silence ends. For pending silences, it shows when the silence starts.
7. User that created the silence.
8. Actions you can do with a silence.

1. Filtering Alerting Rules by their name.
2. Filtering Alerting Rules by their states.
3. Alerting Rule name.
4. Value of the Severity label of the Alerting Rule.
5. State of the Alert defined by the Alerting Rule.

Procedure

1. Open the OpenShift Container Platform web console and navigate to the Monitoring Alerting Alerts page.
2. Optional: Filter the alerts by name using the Filter Alerts by name field.
3. Optional: Filter the alerts by state using one or more of the state buttons Firing, Silenced, Pending.
4. Optional: Sort the alerts by clicking one or more of the Name, Severity, and State column headers.

5. After you see the alert you need, you can see either details of the alert or details of its governing alerting rule.

   To see alert details, click on the name of the alert. The page that opens has the graph with timeseries of the alert. It also has information about the alert, including:

   • A link to its governing alerting rule
   • Description of the alert
   • Labels attached to the alert

   To see alerting rule details, click the button in the last column and select View Alerting Rule. The page that opens has information about the alerting rule, including:

   • Alerting rule name, severity, and description
   • The expression that defines the condition for firing the alert
   • The time for which the condition should be true for an alert to fire
   • Graph for each alert governed by the alerting rule, showing the value with which the alert is firing
   • Table of all alerts governed by the alerting rule

1. Navigate to the Monitoring Alerting Silences page of the OpenShift Container Platform web console.
2. Click Create Silence.
3. Populate the Create Silence form.
4. To create the silence, click Silence.

1. Navigate to the Monitoring Alerting Alerts page of the OpenShift Container Platform web console.
2. For the alert that you want to silence, click the button in the last column and click Silence Alert. The Create Silence form will appear with prepopulated specification of the chosen alert.
3. Optional: Modify the silence.
4. To create the silence, click Silence.

Procedure

1. Open the OpenShift Container Platform web console and navigate to the Monitoring Alerting Silences page.
2. Optional: Filter the silences by name using the Filter Silences by name field.
3. Optional: Filter the silences by state using one or more of the state buttons Active, Pending, Expired.
4. Optional: Sort the silences by clicking one or more of the Name, Firing Alerts, State, and Creator column headers.

5. After you see the silence, you can click its name to see the details, including:

   • Alert specification
   • State
   • Start time
   • End time
   • Number and list of firing alerts

Procedure

1. Navigate to the Monitoring Alerting Silences page.

2. For the silence you want to modify, click the button in the last column and click Edit silence.

   Alternatively, you can click Actions Edit Silence in the Silence Overview screen for a particular silence.

3. In the Edit Silence screen, enter your changes and click the Save button. This will expire the existing silence and create one with the chosen configuration.

Procedure

1. Navigate to the Monitoring Alerting Silences page.

2. For the silence you want to expire, click the button in the last column and click Expire Silence.

   Alternatively, you can click the Actions Expire Silence button in the Silence Overview page for a particular silence.

3. Confirm by clicking Expire Silence. This expires the silence.

1. Navigate to the Administration Cluster Settings Global Configuration Alertmanager YAML page of the web console.
2. Modify the YAML configuration file.
3. Click Save.