Difference between revisions of "MediaWiki on Kubernetes"
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To do so, we'll need to implement [[Kubernetes]]. | To do so, we'll need to implement [[Kubernetes]]. | ||
| + | == Ansible with Kubernetes == | ||
We will almost certainly leverage [[Ansible]] as an orchestration tool. In a recent blog post on ansible.com, Jeff Geerling (@geerlingguy) answers the question: "[https://www.ansible.com/blog/how-useful-is-ansible-in-a-cloud-native-kubernetes-environment How Useful is Ansible in a Cloud-native Kubernetes Environment?] The short answer is that Ansible can be used for: | We will almost certainly leverage [[Ansible]] as an orchestration tool. In a recent blog post on ansible.com, Jeff Geerling (@geerlingguy) answers the question: "[https://www.ansible.com/blog/how-useful-is-ansible-in-a-cloud-native-kubernetes-environment How Useful is Ansible in a Cloud-native Kubernetes Environment?] The short answer is that Ansible can be used for: | ||
# Container Build ([[Ansible-bender]]) | # Container Build ([[Ansible-bender]]) | ||
# Cluster Management ([[Kubespray]]) | # Cluster Management ([[Kubespray]]) | ||
# Application Lifecycle (Use Ansible to build Operators with the Operator SDK to handle deployment, upgrades, backups, etc.) | # Application Lifecycle (Use Ansible to build Operators with the Operator SDK to handle deployment, upgrades, backups, etc.) | ||
| + | |||
| + | Here's more information about [[Ansible with Kubernetes]] | ||
| + | |||
| + | == At WikiMedia Foundation == | ||
| + | We also want to leverage the work being done at WMF. See [[Automated deployment of MediaWiki]] | ||
| + | |||
| + | == Twelve-Factor App == | ||
| + | One of the challenges, especially since it involves potential changes to MediaWiki itself, is the notion of "[https://12factor.net/ The Twelve-Factor App]" and how MediaWiki currently does not meet the criteria in one way or another. There's an open issue: [https://phabricator.wikimedia.org/T173955 Allow DefaultSettings.php be overridden by environment variables] that would help with the config aspect of things. The guys at Roots.io created an alternate WordPress system starting back in 2013 "[https://roots.io/twelve-factor-wordpress/ Twelve-Factor WordPress App]", inspired by an even older post [http://www.darrenmothersele.com/blog/2013/05/29/twelve-factor-drupal/ The Twelve-Factor Drupal Web App]. A more recent presentation on [https://docs.google.com/presentation/d/1AZIq628GEquvljmjSDAqvP0KkgkBWATWHWM39rat66c/edit#slide=id.p Twelve-Factor Drupal] was made at Drupal Camp Colorado in 2019. | ||
== High-level outline == | == High-level outline == | ||
| Line 20: | Line 29: | ||
## Create service account at GitHub - to prevent access to private repos through Docker Hub | ## Create service account at GitHub - to prevent access to private repos through Docker Hub | ||
## Add automated builds and automated testing | ## Add automated builds and automated testing | ||
| + | # Create a [[Kubernetes Operator]] for MediaWiki. | ||
| + | # Add metrics with the [https://github.com/helm/charts/tree/master/stable/prometheus-operator helm chart prometheus-operator] | ||
| − | Docker (default in kublet <ref>https://github.com/kubernetes/community/blob/master/contributors/devel/sig-node/container-runtime-interface.md</ref>) is | + | == Container Runtime == |
| + | [[Docker]] (default in kublet <ref>https://github.com/kubernetes/community/blob/master/contributors/devel/sig-node/container-runtime-interface.md</ref>) is one of the container runtimes that can be used with Kubernetes. The others include containerd and CRI-O. | ||
[[Category:Virtualization]] | [[Category:Virtualization]] | ||
| + | [[Category:Kubernetes]] | ||
Latest revision as of 07:41, 14 November 2023
We will provide a MediaWiki platform with the following characteristics:
- self-healing infrastructure
- auto-scaling
- high-availability with multi-server failover
- flexible storage backends
- multi-cloud compatibility
To do so, we'll need to implement Kubernetes.
Contents
Ansible with Kubernetes[edit | edit source]
We will almost certainly leverage Ansible as an orchestration tool. In a recent blog post on ansible.com, Jeff Geerling (@geerlingguy) answers the question: "How Useful is Ansible in a Cloud-native Kubernetes Environment? The short answer is that Ansible can be used for:
- Container Build (Ansible-bender)
- Cluster Management (Kubespray)
- Application Lifecycle (Use Ansible to build Operators with the Operator SDK to handle deployment, upgrades, backups, etc.)
Here's more information about Ansible with Kubernetes
At WikiMedia Foundation[edit | edit source]
We also want to leverage the work being done at WMF. See Automated deployment of MediaWiki
Twelve-Factor App[edit | edit source]
One of the challenges, especially since it involves potential changes to MediaWiki itself, is the notion of "The Twelve-Factor App" and how MediaWiki currently does not meet the criteria in one way or another. There's an open issue: Allow DefaultSettings.php be overridden by environment variables that would help with the config aspect of things. The guys at Roots.io created an alternate WordPress system starting back in 2013 "Twelve-Factor WordPress App", inspired by an even older post The Twelve-Factor Drupal Web App. A more recent presentation on Twelve-Factor Drupal was made at Drupal Camp Colorado in 2019.
High-level outline[edit | edit source]
- Build image. The WMF official images at Docker Hub do not even include a true database; never mind the extensions we need.
- With ansible-bender we can use ansible-playbook + buildah to create our image.
- Publish images to Docker Hub
- Create organization account at Docker Hub; add freephile
- Create service account at GitHub - to prevent access to private repos through Docker Hub
- Add automated builds and automated testing
- Create a Kubernetes Operator for MediaWiki.
- Add metrics with the helm chart prometheus-operator
Container Runtime[edit | edit source]
Docker (default in kublet [1]) is one of the container runtimes that can be used with Kubernetes. The others include containerd and CRI-O.
