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various kustomization overlays (sourcegraph#541)
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‎README.dev.md

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@@ -107,3 +107,5 @@ IMAGE=repo-updater:dev ./cmd/repo-updater/build.sh
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kubectl edit deployment/repo-updater # set imagePullPolicy to Never
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kubectl set image deployment repo-updater '*=repo-updater:dev'
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```
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You can also use the [minikube overlay](overlays/minikube/README.md). This avoids modifying the config files in `base`.

‎overlays/README.md

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# Overlays for kustomizations
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This directory contains overlays for various [kustomizations](https://kustomize.io/). kustomize has become a standard way
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to specialize a set of Kubernetes YAML config files for different cluster setups, environments and other parametrizations.
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Starting with client version 1.14 of `kubectl` it is built into kubectl itself and can be used with the `apply` command
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and the flag `-k` instead of flag `-f`.
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If your kubectl version is older and doesn't support `apply -k` you can still use these kustomizations. You need to
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install the standalone [kustomize](https://kustomize.io/) binary, generate the YAML files with `kustomize build` and
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then use the built YAML with `kubectl apply -f`. For example:
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```shell script
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cd overlays/namespaced
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kustomize build | kubectl apply -f -
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```
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‎overlays/migrate-to-nonroot/README.md

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This kustomization injects initContainers in all pods with persistent volumes to transfer ownership of directories to
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specified non-root users. It is used for migrating existing installations to a non-root environment.
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This only needs to be run once for installations that want to upgrade to 3.14. Afterwards it can be ignored.
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```shell script
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cd overlays/migrate-to-nonroot
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kubectl apply -k .
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```
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‎overlays/minikube/README.md

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This kustomization deletes resource declarations and storage classnames to enable runnning Sourcegraph on minikube.
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Starting Sourcegraph:
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```shell script
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minikube start
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cd overlays/minikube
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kubectl create namespace ns-sourcegraph
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kubectl -n ns-sourcegraph apply -l deploy=sourcegraph -k .
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kubectl -n ns-sourcegraph expose deployment sourcegraph-frontend --type=NodePort --name sourcegraph
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minikube service list
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```
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Tearing it down:
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```shell script
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kubectl delete namespaces ns-sourcegraph
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minikube stop
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```

‎overlays/minikube/delete-resources-2.yaml

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- op: remove
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path: /spec/template/spec/containers/0/resources
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- op: remove
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path: /spec/template/spec/containers/1/resources

‎overlays/minikube/delete-resources.yaml

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- op: remove
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path: /spec/template/spec/containers/0/resources

‎overlays/minikube/delete-storageclassname.yaml

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- op: remove
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path: /spec/storageClassName

‎overlays/minikube/gitserver-patch.yaml

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- op: remove
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path: /spec/volumeClaimTemplates/0/spec/storageClassName
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- op: remove
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path: /spec/template/spec/containers/0/resources

‎overlays/minikube/indexed-search-patch.yaml

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- op: remove
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path: /spec/volumeClaimTemplates/0/spec/storageClassName
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- op: remove
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path: /spec/template/spec/containers/0/resources
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- op: remove
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path: /spec/template/spec/containers/1/resources

‎overlays/minikube/kustomization.yaml

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apiVersion: kustomize.config.k8s.io/v1beta1
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kind: Kustomization
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namespace: ns-sourcegraph
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bases:
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- ../../base
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patchesJson6902:
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- target:
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kind: Deployment
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name: sourcegraph-frontend
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group: apps
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version: v1
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path: delete-resources.yaml
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- target:
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kind: Deployment
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name: github-proxy
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group: apps
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version: v1
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path: delete-resources.yaml
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- target:
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kind: StatefulSet
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name: gitserver
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group: apps
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version: v1
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path: gitserver-patch.yaml
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- target:
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kind: Deployment
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name: grafana
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group: apps
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version: v1
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path: delete-resources.yaml
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- target:
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kind: StatefulSet
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name: indexed-search
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group: apps
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version: v1
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path: indexed-search-patch.yaml
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- target:
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kind: Deployment
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name: lsif-server
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group: apps
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version: v1
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path: delete-resources.yaml
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- target:
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kind: Deployment
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name: pgsql
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group: apps
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version: v1
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path: delete-resources-2.yaml
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- target:
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kind: Deployment
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name: prometheus
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group: apps
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version: v1
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path: delete-resources.yaml
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- target:
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kind: Deployment
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name: query-runner
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group: apps
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version: v1
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path: delete-resources.yaml
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- target:
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kind: Deployment
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name: redis-cache
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group: apps
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version: v1
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path: delete-resources-2.yaml
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- target:
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kind: Deployment
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name: redis-store
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group: apps
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version: v1
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path: delete-resources-2.yaml
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- target:
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kind: Deployment
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name: replacer
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group: apps
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version: v1
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path: delete-resources.yaml
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- target:
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kind: Deployment
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name: repo-updater
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group: apps
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version: v1
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path: delete-resources.yaml
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- target:
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kind: Deployment
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name: searcher
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group: apps
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version: v1
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path: delete-resources.yaml
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- target:
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kind: Deployment
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name: symbols
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group: apps
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version: v1
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path: delete-resources.yaml
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- target:
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kind: Deployment
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name: syntect-server
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group: apps
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version: v1
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path: delete-resources.yaml
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- target:
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kind: PersistentVolumeClaim
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name: prometheus
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version: v1
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path: delete-storageclassname.yaml
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- target:
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kind: PersistentVolumeClaim
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name: lsif-server
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version: v1
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path: delete-storageclassname.yaml
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- target:
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kind: PersistentVolumeClaim
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name: grafana
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version: v1
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path: delete-storageclassname.yaml
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- target:
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kind: PersistentVolumeClaim
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name: pgsql
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version: v1
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path: delete-storageclassname.yaml
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- target:
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kind: PersistentVolumeClaim
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name: redis-cache
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version: v1
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path: delete-storageclassname.yaml
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- target:
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kind: PersistentVolumeClaim
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name: redis-store
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version: v1
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path: delete-storageclassname.yaml
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