339 lines
8.9 KiB
Markdown
339 lines
8.9 KiB
Markdown
# k8s
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This folder holds all the services required for my private infrastructure. Following contraints apply:
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* Order of implementation is top down.
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* Every namespace has a subfolder within this subdirectory.
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* helm3
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# Operations
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Cleanup `Error` pods.
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```sh
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kubectl get pods | grep Error | cut -d' ' -f 1 | xargs kubectl delete pod
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```
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Redeploy a deployment:
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```sh
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DEPLOYMENT="rstudio"
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NAMESPACE="datalab"
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kubectl patch deployment $DEPLOYMENT -n $NAMESPACE -p "{\"spec\": {\"template\": {\"metadata\": { \"labels\": { \"redeploy\": \"$( date +%s )\"}}}}}"
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```
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# Deployment
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## namespaces
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```sh
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namespaces="flux cert-manager nginx-ingress infrapuzzle kuard auth nextcloud datalab web development tt-rss backup monitoring nextcloud mailu"
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for i in $( echo $NAMESPACES ) ; do
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k create ns $i
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done
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```
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## helm repositories
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```sh
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helm repo add stable https://kubernetes-charts.storage.googleapis.com
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helm repo add jetstack https://charts.jetstack.io
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helm repo add bitnami https://charts.bitnami.com/bitnami
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helm repo add k8s-land https://charts.k8s.land
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helm repo add mailu https://mailu.github.io/helm-charts/
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helm repo update
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```
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## [ingress-controller](https://github.com/helm/charts/tree/master/stable/nginx-ingress)
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Apply with helm-operator:
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```bash
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helm upgrade nginx-ingress stable/nginx-ingress -n nginx-ingress -f nginx-ingress/nginx-ingress.yaml
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```
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## [cert-manager](https://cert-manager.io/docs/tutorials/acme/ingress/)
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Apply with helm-operator:
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```bash
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helm upgrade cert-manager jetstack/cert-manager -n cert-manager -f cert-manager/cert-manager.yaml
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# probably not even needed:
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$ kubectl apply -f https://raw.githubusercontent.com/jetstack/cert-manager/master/deploy/manifests/00-crds.yaml
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# this is required:
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$ kubectl apply -f cert-manager/staging-issuer.yaml
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$ kubectl apply -f cert-manager/production-issuer.yaml
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```
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To test all this you may use the kuaard demo project:
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```sh
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$ kubectl apply -f kuard
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# checkout: https://kuard.haumdaucher.de
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$ kubectl delete -f kuard
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```
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## Add private docker registry
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```sh
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# create secret base64 encoded and put it in htpasswd helm chart
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USER='moritz'
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PASSWORD='xxx'
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docker run --entrypoint htpasswd --rm registry:2 -Bbn $USER $PASSWORD
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# #
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helm upgrade --install docker-registry stable/docker-registry -n development -f development/registry.secret.yaml
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##kubectl apply -f development/registry.secret.yaml
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```
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### creating docker-pull-secret
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Create credentials secret [according to docu](https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/#create-a-secret-by-providing-credentials-on-the-command-line):
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```sh
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namespaces="datalab"
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for i in $( echo $namespaces ) ; do
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kubectl create secret docker-registry registry-haumdaucher-de \
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-n $i \
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--docker-server=registry.haumdaucher.de \
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--docker-username=moritz \
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--docker-password='xxx' \
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--docker-email=moritz@moritzgraf.de \
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--dry-run -o yaml > ./${i}/docker-pull.yaml.secret
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done
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# apply
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for i in $( echo $namespaces ) ; do
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kubectl apply -f ${i}/docker-pull.yaml.secret
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done
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```
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## openebs
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Formerly installed using the helm operator, may now be updated using the following command:
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```sh
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helm upgrade --install -f openebs/openebs.yml --name openebs --namespace openebs stable/openebs
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```
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## networking with calico
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Install calicoctl in cluster
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```sh
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kubectl apply -n kube-system -f https://docs.projectcalico.org/manifests/calicoctl.yaml
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```
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Then you may send commands like:
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```sh
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kubectl exec -ti -n kube-system calicoctl -- /calicoctl get workloadendpoints -n mailu
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```
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Or on the server directly:
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```sh
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sudo -E /usr/local/bin/calicoctl node checksystem
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```
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### metrics
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See this [documentation](https://docs.projectcalico.org/maintenance/monitor-component-metrics).
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```sh
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kubectl exec -ti -n kube-system calicoctl -- /calicoctl patch felixConfiguration default --patch '{"spec":{"prometheusMetricsEnabled": true}}'
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kubectl apply -n kube-system -f - <<EOF
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apiVersion: v1
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kind: Service
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metadata:
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name: felix-metrics-svc
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namespace: kube-system
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spec:
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selector:
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k8s-app: calico-node
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ports:
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- port: 9091
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targetPort: 9091
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EOF
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```
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## rstudio
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Currently only for one user:
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```sh
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kubectl apply -f datalab/rstudio.yaml
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```
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## tt-rss
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Includes *persistent data* from mariadb table `tt-rss`.
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```sh
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helm upgrade --install tt-rss-mariadb bitnami/mariadb -n tt-rss -f tt-rss/tt-rss-mariadb.secret.yml
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helm upgrade --install tt-rss-phpmyadmin bitnami/phpmyadmin -n tt-rss -f tt-rss/tt-rss-phpmyadmin.yml
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kubectl apply -f tt-rss/
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```
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## monitoring
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```sh
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helm upgrade --install prometheus-operator stable/prometheus-operator -n monitoring -f monitoring/prometheus-operator.secret.yml
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```
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## gitea
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In case my PRs have been accepted this is no longer necessary:
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```sh
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git clone git@github.com:iptizer/gitea-chart.git
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```
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```sh
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# from chart repo
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helm upgrade --install gitea k8s-land/gitea -n development -f development/gitea.secret.yml
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# from local folder
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helm upgrade --install gitea ./gitea-chart -n development -f development/gitea.secret.yml
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# phpmyadmin
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helm upgrade --install gitea-phpmyadmin bitnami/phpmyadmin -n development -f development/gitea-phpmyadmin.yml
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```
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### backup & restore
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See the backup cronjob in the `/backup/` folder.
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For backup & restore see [gitea documentation](https://docs.gitea.io/en-us/backup-and-restore/).
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Download the `gitea-dump` locally and proceed with the following commands:
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```sh
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❯ mkdir gitea_restore
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❯ mv gitea-dump-1587901016.zip gitea_restore
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❯ cd gitea_restore
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❯ unzip gitea-dump-1587901016.zip
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Archive: gitea-dump-1587901016.zip
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inflating: gitea-repo.zip
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creating: custom/
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[...]
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```
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Import of sql may be done via phpmyadmin.
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Copy to remote pod:
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```sh
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kubectl cp ./gitea-repo.zip gitea-gitea-69cd9bc59b-q2b2f:/data/git/
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```
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And finally unzip inside shell on pod:
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```sh
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cd /data/git/
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unzip gitea-repo.zip
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mv repositories/ gitea-repositories/
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chown -R git. ./gitea-repositories/
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```
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Then login to git.moritzgraf.de and proceed with default values, or adjust them.
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## nextcloud
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```sh
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helm upgrade --install nextcloud stable/nextcloud -n nextcloud -f nextcloud/nextcloud.secret.yml
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helm upgrade --install nextcloud-phpmyadmin bitnami/phpmyadmin -n nextcloud -f nextcloud/nextcloud-phpmyadmin.yml
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```
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### backup & restore
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## mailu
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Using the [mailu helm chart](https://github.com/Mailu/helm-charts/tree/master/mailu).
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```sh
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helm repo add mailu https://mailu.github.io/helm-charts/
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helm repo update
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helm upgrade --install mailu mailu/mailu -n mailu -f mailu/mailu.secret.yml
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helm upgrade --install mailu ../../mailu-helm-charts/mailu/ -n mailu -f mailu/mailu.secret.yml
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helm template mailu ../../mailu-helm-charts/mailu/ -n mailu -f mailu/mailu.secret.yml
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```
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### troubleshooting
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Test imap from console:
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```sh
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openssl s_client -crlf -connect moritzgraf.de:993
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```
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### migrate
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```sh
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# backup on moritzgraf.de
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ssh moritzgraf.de "sudo su - docker -c 'cd /home/docker/mailu && docker-compose stop' && sudo su - root -c 'cd /home/docker && tar czvf mailu.tar.gz ./mailu && mv mailu.tar.gz /home/moritz/ && chown moritz. /home/moritz/mailu.tar.gz' && scp mailu.tar.gz haumdaucher.de:/home/moritz/"
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# terraform change
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cd ../terraform && terraform apply
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# helm apply
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cd ../k8s
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helm upgrade --install mailu mailu/mailu -n mailu -f mailu/mailu.secret.yml
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# apply mailu and scale all to 0
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kc mailu
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k scale --replicas=0 --all=true deploy
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# apply restore pod
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k apply -f mailu/restore.yaml
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# copy tar gz
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ssh one
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k cp mailu.tar.gz restore:/data/
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# exec to pod and arrange persistence
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k exec -it restore -- bash
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cd /data
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tar xzvf mailu.tar.gz
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mv mailu/data/* ./admin/
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mv mailu/dkim/* ./dkim/
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mv mailu/mail/* ./dovecotmail/
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chown -R mail:man ./dovecotmail
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# scale up
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k scale --replicas=1 --all=true deploy
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```
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Checks:
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* browser mail.moritzgraf.de & login
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* browser mail.moritzgraf.de/admin
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## minio
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```sh
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kubectl apply -f minio
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```
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## Add mopbot & corona & corona-api
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```sh
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kubectl apply -f datalab/
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```
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## zebrium
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[zebrium.io](https://zebrium.io) hat "AI powered" troubleshooting. This is a test use-case for my cluster. It was installed using the following command:
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```sh
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kubectl create namespace zebrium
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helm install zlog-collector zlog-collector --namespace zebrium --repo https://raw.githubusercontent.com/zebrium/ze-kubernetes-collector/master/charts --set zebrium.collectorUrl=https://zapi03.zebrium.com,zebrium.authToken=4CFDFC1B806869D78185776AD7D940B0B16254AC,zebrium.deployment=iptizer-zebrium-deploy,zebrium.timezone=Europe/Berlin
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helm install zstats-collector zstats --namespace zebrium --repo https://raw.githubusercontent.com/zebrium/ze-stats/master/charts --set zebrium.collectorUrl=https://zapi03.zebrium.com/stats/api/v1/zstats,zebrium.authToken=4CFDFC1B806869D78185776AD7D940B0B16254AC,zebrium.deployment=iptizer-zebrium-deploy
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```
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## Benchmark with dbench
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Should be usually uncommented, but dbbench may be executed to check speed of local filesystem:
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```sh
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k create ns dbench
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k apply -f dbench/
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k delete -f dbench
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```
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## Web
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```sh
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kubectl apply -f web/
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```
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