67662bb735
By default gitea caches everything in memory using a Go hashmap. There is suspicion that the now many persistent AI web crawlers cause this hashmap to grow in ways that eventually cause the Go GC system to pause the world in noticeable ways when loading pages. Restarting the gitea services seems to temporarily reset things (as it should with an in memory map) until we cross some threshold and things become slow again. The good news is that gitea supports several backends (called adapters) for the cache. We elect to use memcached because it is relatively simple and has a FOSS license (unlike redis). The other alternative we could consider is twoqueue which also caches within memory in the Go runtime but allows for setting a size limit. I've gone with memcached because it doesn't rely on Golang GC, but twoqueue is likely simpler if we want to start there. Note we also bump the job timeout to 5400 seconds (90 minutes) from 4800 seconds (80 minutes) because a run on ovh-gra1 timed out while running testinfra test cases (the very end of the job). It is possible that using memcache is slightly slower than using in process memory caching, but the goal here isn't to make things faster it is to make things more consistent over time. As long as memcached performance is within the same ballpark and doesn't degrade over time this is acceptable. Change-Id: Ie9ca246a8321fe84d9a1582e35cd4c5459b48bee
OpenDev System Configuration
This is the machinery that drives the configuration, testing, continuous integration and deployment of services provided by the OpenDev project.
Services are driven by Ansible playbooks and associated roles stored
here. If you are interested in the configuration of a particular
service, starting at playbooks/service-<name>.yaml
will show you how it is configured.
Most services are deployed via containers; many of them are built or
customised in this repository; see docker/.
A small number of legacy services are still configured with Puppet.
Although the act of running puppet on these hosts is managed by Ansible,
the actual core of their orchestration lives in manifests
and modules.
The files in this repository are provided as an opinionated example service deployment, and to allow the OpenDev Collaboratory to use public software development workflows in order to coordinate changes and improvements to the systems it runs. This repository is not intended as a reconsumable project on its own, and anyone wishing to adjust it to suit their own needs should do so with a fork. The system-config reviewers are unable to evaluate and support use cases for the contents here other than their own.
Testing
OpenDev infrastructure runs a complete testing and continuous-integration environment, powered by Zuul.
Any changes to playbooks, roles or containers will trigger jobs to thoroughly test those changes.
Tests run the orchestration for the modified services on test nodes
assigned to the job. After the testing deployment is configured
(validating the basic environment at least starts running), specific
tests are configured in the testinfra directory to validate
functionality.
Continuous Deployment
Once changes are reviewed and committed, they will be applied
automatically to the production hosts. This is done by Zuul jobs running
in the deploy pipeline. At any one time, you may see these
jobs running live on the status page or
you could check historical runs on the pipeline
results (note there is also an opendev-prod-hourly
pipeline, which ensures things like upstream package updates or
certificate renewals are incorporated in a timely fashion).
Contributing
Contributions are welcome!
You do not need any special permissions to make contributions, even those that will affect production services. Your changes will be automatically tested, reviewed by humans and, once accepted, deployed automatically.
Bug fixes or modifications to existing code are great places to start, and you will see the results of your changes in CI testing. Please remember that this repository consists of configuration and orchestration for OpenDev Collaboratory production systems, so contributions to it will be evaluated on the basis of whether they're useful or applicable to OpenDev's services. Changes intended to make the contents more easily reusable outside OpenDev itself are not in scope, and so will be rejected by reviewers.
You can develop all the playbooks, roles, containers and testing required for a new service just by uploading a change. Using a similar service as a template is generally a good place to start. If deploying to production will require new compute resources (servers, volumes, etc.) these will have to be deployed by an OpenDev administrator before your code is committed. Thus if you know you will need new resources, it is best to coordinate this before review.
The #opendev IRC on OFTC channel is the main place for interactive discussion. Feel free to ask any questions and someone will try to help ASAP. The OpenDev meeting is a co-ordinated time to synchronize on infrastructure issues. Issues should be added to the agenda for discussion; even if you can not attend, you can raise your issue and check back on the logs later. There is also the service-discuss mailing list where you are welcome to send queries or questions.
Documentation
The latest documentation is available at https://docs.opendev.org/opendev/system-config/latest/
That documentation is generated from this repository. You can geneate
it yourself with tox -e docs.