6dbb9475f9
This initial commit includes support for Mcrouter, Memcached, basic CI tests as well as Helm charts for deploying things. Depends-On: https://review.opendev.org/713107 Depends-On: https://review.opendev.org/713115 Change-Id: I0b1ab6d8e716460e095bc3953614e336620f984e
35 lines
1.1 KiB
Markdown
35 lines
1.1 KiB
Markdown
# Mcrouter
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Mcrouter is a memcached protocol router for scaling Memcached deployments. It
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is a core component of cache infrastructure at Facebook and Instagram where
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Mcrouter handles almost 5 billion requests per second at peak.
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OpenStack usually comes down to a halt if one of the Memcached instances don't
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respond anymore. Mcrouter is used to enable high availability and redundancy
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so that any Memcached outages will not affect the OpenStack services.
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The only two possible reasons that we can have a full system slowdown at the
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moment remains:
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- All backends (Memcached instances) are all down
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- All Mcrouter replicas are down
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The first probably means there's a bigger issue in play, the latter will
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likely automatically recover by Kubernetes ensuring that replicas come back
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up. Also, due to the fact that the service is exposed as a ClusterIP, it only
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takes a single replica to be up for everything to come back to start working
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again.
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## Example
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```yaml
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apiVersion: infrastructure.vexxhost.cloud/v1alpha1
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kind: Mcrouter
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metadata:
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name: sample
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spec:
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route: PoolRoute|default
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pools:
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default:
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servers: ['10.0.0.1:11211', '10.0.0.2:11211']
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``` |