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Chapter 5. Performing health checks on Red Hat Quay deployments

Health check mechanisms are designed to assess the health and functionality of a system, service, or component. Health checks help ensure that everything is working correctly, and can be used to identify potential issues before they become critical problems. By monitoring the health of a system, Red Hat Quay administrators can address abnormalities or potential failures for things like geo-replication deployments, Operator deployments, standalone Red Hat Quay deployments, object storage issues, and so on. Performing health checks can also help reduce the likelihood of encountering troubleshooting scenarios.

Health check mechanisms can play a role in diagnosing issues by providing valuable information about the system’s current state. By comparing health check results with expected benchmarks or predefined thresholds, deviations or anomalies can be identified quicker.

5.1. Red Hat Quay health check endpoints

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Red Hat Quay has several health check endpoints. The following table shows you the health check, a description, an endpoint, and an example output.

Table 5.1. Health check endpoints
Health checkDescriptionEndpointExample output

instance

The instance endpoint acquires the entire status of the specific Red Hat Quay instance. Returns a dict with key-value pairs for the following: auth, database, disk_space, registry_gunicorn, service_key, and web_gunicorn. Returns a number indicating the health check response of either 200, which indicates that the instance is healthy, or 503, which indicates an issue with your deployment.

https://{quay-ip-endpoint}/health/instance or https://{quay-ip-endpoint}/health

{"data":{"services":{"auth":true,"database":true,"disk_space":true,"registry_gunicorn":true,"service_key":true,"web_gunicorn":true}},"status_code":200}

endtoend

The endtoend endpoint conducts checks on all services of your Red Hat Quay instance. Returns a dict with key-value pairs for the following: auth, database, redis, storage. Returns a number indicating the health check response of either 200, which indicates that the instance is healthy, or 503, which indicates an issue with your deployment.

https://{quay-ip-endpoint}/health/endtoend

{"data":{"services":{"auth":true,"database":true,"redis":true,"storage":true}},"status_code":200}

warning

The warning endpoint conducts a check on the warnings. Returns a dict with key-value pairs for the following: disk_space_warning. Returns a number indicating the health check response of either 200, which indicates that the instance is healthy, or 503, which indicates an issue with your deployment.

https://{quay-ip-endpoint}/health/warning

{"data":{"services":{"disk_space_warning":true}},"status_code":503}

5.2. Navigating to a Red Hat Quay health check endpoint

Use the following procedure to navigate to the instance endpoint. This procedure can be repeated for endtoend and warning endpoints.

Procedure

  1. On your web browser, navigate to https://{quay-ip-endpoint}/health/instance.

  2. You are taken to the health instance page, which returns information like the following: 

    {"data":{"services":{"auth":true,"database":true,"disk_space":true,"registry_gunicorn":true,"service_key":true,"web_gunicorn":true}},"status_code":200}

    For Red Hat Quay, "status_code": 200 means that the instance is health. Conversely, if you receive "status_code": 503, there is an issue with your deployment.

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