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Add Documentation for 'Kubernetes Commands (Without Helm) To Deploy New Docker Images To A Kubernetes Cluster'

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Wolfgang Huß 2022-07-20 09:38:50 +02:00
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deployment/kubernetes/README.md
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@ -225,3 +225,50 @@ support, try this [helm chart](https://github.com/helm/charts/tree/master/stable
On our kubernetes cluster we get "mult-attach" errors for persistent volumes. On our kubernetes cluster we get "mult-attach" errors for persistent volumes.
Apparently DigitalOcean's kubernetes clusters do not fulfill the requirements. Apparently DigitalOcean's kubernetes clusters do not fulfill the requirements.
## Kubernetes Commands (Without Helm) To Deploy New Docker Images To A Kubernetes Cluster
### Deploy A Version
```bash
# !!! be aware of the correct kube context !!!
$ kubectl config get-contexts
# deploy version '$BUILD_VERSION'
# !!! 'latest' is not recommended on production !!!
# for easyness set env
$ export BUILD_VERSION=1.0.8-48-ocelot.social1.0.8-184 # example
# check this with
$ echo $BUILD_VERSION
1.0.8-48-ocelot.social1.0.8-184
# deploy actual version '$BUILD_VERSION' to Kubernetes cluster
$ kubectl -n default set image deployment/ocelot-webapp container-ocelot-webapp=ocelotsocialnetwork/webapp:$BUILD_VERSION
$ kubectl -n default rollout restart deployment/ocelot-webapp
$ kubectl -n default set image deployment/ocelot-backend container-ocelot-backend=ocelotsocialnetwork/backend:$BUILD_VERSION
$ kubectl -n default rollout restart deployment/ocelot-backend
$ kubectl -n default set image deployment/ocelot-maintenance container-ocelot-maintenance=ocelotsocialnetwork/maintenance:$BUILD_VERSION
$ kubectl -n default rollout restart deployment/ocelot-maintenance
$ kubectl -n default set image deployment/ocelot-neo4j container-ocelot-neo4j=ocelotsocialnetwork/neo4j-community:$BUILD_VERSION
$ kubectl -n default rollout restart deployment/ocelot-neo4j
# verify deployment and wait for the pods of each deployment to get ready for cleaning and seeding of the database
$ kubectl -n default rollout status deployment/ocelot-webapp --timeout=240s
$ kubectl -n default rollout status deployment/ocelot-maintenance --timeout=240s
$ kubectl -n default rollout status deployment/ocelot-backend --timeout=240s
$ kubectl -n default rollout status deployment/ocelot-neo4j --timeout=240s
```
### Staging – Clean And Seed Neo4j Database
***ATTENTION:*** Cleaning and seeding of our Neo4j database is only possible in production if env `PRODUCTION_DB_CLEAN_ALLOW=true` is set in our deployment.
```bash
# !!! be aware of the correct kube context !!!
$ kubectl config get-contexts
# reset and seed Neo4j database via backend for staging
$ kubectl -n default exec -it $(kubectl -n default get pods | grep ocelot-backend | awk '{ print $1 }') -- /bin/sh -c "node dist/db/clean.js"
$ kubectl -n default exec -it $(kubectl -n default get pods | grep ocelot-backend | awk '{ print $1 }') -- /bin/sh -c "node dist/db/seed.js"
```