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| <h5 class="page-header text-uppercase">Documentation |
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| <h1 id="http-endpoints">HTTP endpoints</h1> |
| |
| <p>There are a number of HTTP endpoints that the Aurora scheduler exposes. These allow various |
| operational tasks to be performed on the scheduler. Below is an (incomplete) list of such endpoints |
| and a brief explanation of what they do.</p> |
| |
| <h2 id="leader-health">Leader health</h2> |
| |
| <p>The /leaderhealth endpoint enables performing health checks on the scheduler instances inorder |
| to forward requests to the leading scheduler. This is typically used by a load balancer such as |
| HAProxy or AWS ELB.</p> |
| |
| <p>When a HTTP GET request is issued on this endpoint, it responds as follows:</p> |
| |
| <ul> |
| <li>If the instance that received the GET request is the leading scheduler, a HTTP status code of |
| <code>200 OK</code> is returned.</li> |
| <li>If the instance that received the GET request is not the leading scheduler but a leader does |
| exist, a HTTP status code of <code>503 SERVICE_UNAVAILABLE</code> is returned.</li> |
| <li>If no leader currently exists or the leader is unknown, a HTTP status code of <code>502 BAD_GATEWAY</code> |
| is returned.</li> |
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