djpbessems/Kubernetes.K3s.installLog

djpbessems 033ddc61ca Updated documentation

2021-06-14 16:42:22 +02:00

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TODO: Files with sensitive data; move to Vault

# line 6-8: services/Guacamole/configMap_Guacamole.yml

Kubernetes.K3s.installLog

3 VM's provisioned with Ubuntu Server 18.04

additional lvm configuration

pvdisplay
pvcreate /dev/sdb
vgdisplay
vgcreate longhorn-vg /dev/sdb
lvdisplay
lvcreate -l 100%FREE -n longhorn-lv longhorn-vg
ls /dev/mapper
mkfs.ext4 /dev/mapper/longhorn--vg-longhorn--lv
#! add "UUID=<uuid> /mnt/blockstorage ext4 defaults 0 0" to /etc/fstab
mkdir /mnt/blockstorage
mount -a

K3s cluster

On first node:

curl -sfL https://get.k3s.io | sh -s - --disable local-path,traefik
cat /var/lib/rancher/k3s/server/token
kubectl config view --raw

On subsequent nodes:

curl -sfL https://get.k3s.io | K3S_URL=https://<fqdn or ip>:6443 K3S_TOKEN=<value from master> sh -

0) Configure automatic updates

Install Rancher's System Upgrade Controller:

kubectl apply -f https://github.com/rancher/system-upgrade-controller/releases/download/v0.6.2/system-upgrade-controller.yaml

Apply a server (master node) and agent (worker node) plan:

kubectl apply -f system/UpgradeController/plan-Server.yml -f system/UpgradeController/plan-Agent.yml

1) Persistent storage

1.1) `storageClass` for SMB (CIFS):

See https://github.com/kubernetes-csi/csi-driver-smb:

curl -skSL https://raw.githubusercontent.com/kubernetes-csi/csi-driver-smb/master/deploy/install-driver.sh | bash -s master --

Store credentials in secret:

kubectl create secret generic smb-credentials --from-literal username=<<omitted>> --from-literal domain=<<omitted>> --from-literal password=<<omitted>>

1.2) `flexVolume` for SMB (CIFS):

curl -Ls https://github.com/juliohm1978/kubernetes-cifs-volumedriver/blob/master/install.yaml -o storage/flexVolSMB/daemonSet-flexVolSMB.yml

Override drivername to something more sensible (see storage/flexVolSMB/daemonSet-flexVolSMB.yml)

spec:
  template:
    spec:
      containers:
        - image: juliohm/kubernetes-cifs-volumedriver-installer:2.0
          ...
          env:
            - name: VENDOR
              value: mount
            - name: DRIVER
              value: smb
          ...

Perform installation:

kubectl apply -f storage/flexVolSMB/daemonSet-flexVolSMB.yml

Wait for installation to complete (check logs of all installer-pods), then delete daemonSet:

kubectl delete -f storage/flexVolSMB/daemonSet-flexVolSMB.yml

Store credentials in secret:

kubectl create secret generic --type=mount/smb smb-secret --from-literal=username=<<omitted>> --from-literal=password=<<omitted>>

1.3) `storageClass` for distributed block storage:

See Longhorn Helm Chart:

kubectl create namespace longhorn-system
helm repo add longhorn https://charts.longhorn.io
helm install longhorn longhorn/longhorn --namespace longhorn-system --values=storage/Longhorn/chart-values.yml

Expose Longhorn's dashboard through IngressRoute:

kubectl apply -f storage/Longhorn/ingressRoute-Longhorn.yml

Add additional storageClass with backup schedule: After specifying a NFS backup target (syntax: nfs://servername:/path/to/share) through Longhorn's dashboard

kind: StorageClass
apiVersion: storage.k8s.io/v1
metadata:
  name: longhorn-dailybackup
provisioner: driver.longhorn.io
allowVolumeExpansion: true
parameters:
  numberOfReplicas: "3"
  staleReplicaTimeout: "2880"
  fromBackup: ""
  recurringJobs: '[{"name":"backup", "task":"backup", "cron":"0 0 * * *", "retain":14}]'

Then make this the new default storageClass:

kubectl patch storageclass longhorn-dailybackup -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'
#kubectl delete storageclass longhorn

2) Ingress Controller

2.1) Create `configMap`, `secret` and `persistentVolumeClaim`

The configMap contains Traefik's static and dynamic config:

kubectl apply -f ingress/Traefik2.x/configMap-Traefik.yml

The secret contains credentials for Cloudflare's API:

kubectl create secret generic traefik-cloudflare --from-literal=CF_API_EMAIL=<<omitted>> --from-literal=CF_API_KEY=<<omitted>> --namespace kube-system

The persistentVolumeClaim will contain /data/acme.json (referenced as existingClaim):

kubectl apply -f ingress/Traefik2.x/persistentVolumeClaim-Traefik.yml

2.2) Install Helm Chart

See Traefik 2.x Helm Chart:

helm repo add traefik https://containous.github.io/traefik-helm-chart
helm repo update
helm install traefik traefik/traefik --namespace kube-system --values=ingress/Traefik2.x/chart-values.yml

2.3) Replace `IngressRoute` for Traefik's dashboard:

kubectl apply -f ingress/Traefik2.x/ingressRoute-Traefik.yaml
kubectl delete ingressroute traefik-dashboard --namespace kube-system

3) Secret management

Perform these steps after configuring persistent storage and ingress

3.1) Create `persistentVolume` and `ingressRoute`

Requires specifying a uid & gid in the flexvolSMB-persistentVolume

kubectl create namespace vault
kubectl apply -f services/Vault/persistentVolume-Vault.yml
kubectl apply -f services/Vault/ingressRoute-Vault.yml

3.2) Install Helm Chart

REMOVED; left for reference See HashiCorp Vault:

helm repo add hashicorp https://helm.releases.hashicorp.com
helm repo update
helm install vault hashicorp/vault --namespace vault --values=services/Vault/chart-values.yml

Configure Vault for use;

~~Enable Kubernetes authentication (see https://www.vaultproject.io/api-docs/auth/kubernetes)~~
Store basic access policy template
Enable kv-engine

# kubectl exec -n vault -it vault-0 -- sh

# It might be necessary to first login with an existing token:
# vault login

cat <<EOF > /home/vault/app-policy.hcl
path "secret*" {
  capabilities = ["read"]
}
EOF

vault secrets enable -path=secret -version=2 kv

4) Services

4.1) Adminer (SQL management)

kubectl apply -f services/Adminer/configMap-Adminer.yml
kubectl apply -f services/Adminer/deploy-Adminer.yml

Vault configuration:

vault kv put secret/adminer \
  sqlitepw=<value>
vault write auth/kubernetes/role/adminer \
  bound_service_account_names=adminer \
  bound_service_account_namespaces=default \
  policies=adminer \
  ttl=1h
vault policy write adminer /home/vault/app-policy.hcl

4.2) Vaultwarden (password manager)

Requires mount.cifs' option nobrl

kubectl apply -f services/Bitwarden/secret-Bitwarden.yml
kubectl apply -f services/Bitwarden/deploy-Bitwarden.yml

4.3) DroneCI (contineous delivery)

kubectl apply -f services/DroneCI/secret-DroneCI.yml
kubectl apply -f services/DroneCI/deploy-DroneCI.yml

4.4) Gitea (git repository)

kubectl apply -f services/Gitea/deploy-Gitea.yml

4.5) Gotify (notifications)

kubectl apply -f services/Gotify/deploy-Gotify.yml

4.6) Guacamole (remote desktop gateway)

Requires specifying a uid & gid in both the securityContext of the MySQL container and the persistentVolume

kubectl apply -f services/Guacamole/configMap-Guacamole.yml
kubectl apply -f services/Guacamole/deploy-Guacamole.yml

Wait for the included containers to start, then perform the following commands to initialize the database:

kubectl exec -i guacamole-<pod-id> --container guacamole -- /opt/guacamole/bin/initdb.sh --mysql > initdb.sql
kubectl exec -i guacamole-<pod-id> --container mysql -- mysql -uguacamole -pguacamole guacamole < initdb.sql
kubectl rollout restart deployment guacamole

4.7) Lighttpd (webserver)

Serves various semi-containerized websites; respective webcontent is stored on fileshare

kubectl apply -f services/Lighttpd/configMap-Lighttpd.yml
kubectl apply -f services/Lighttpd/deploy-Lighttpd.yml
kubectl apply -f services/Lighttpd/cronJob-Spotweb.yml

4.8) PVR `namespace` (automated media management)

Containers use shared resources to be able to interact with downloaded files

kubectl create secret generic --type=mount/smb smb-secret --from-literal=username=<<omitted>> --from-literal=password=<<omitted>> -n pvr
kubectl apply -f services/PVR/persistentVolumeClaim-PVR.yml
kubectl apply -f services/PVR/storageClass-PVR.yml

4.8.1) NZBHydra (index aggregator)

kubectl apply -f services/PVR/deploy-NZBHydra.yml

4.8.2) Overseerr (request management)

kubectl apply -f services/PVR/deploy-Overseerr.yml

4.8.3) Plex (media library)

Due to usage of symlinks, partially incompatible with SMB-share-backed storage

kubectl apply -f services/PVR/deploy-Plex.yml

After deploying, Plex server needs to be claimed (=assigned to Plex-account):

kubectl get endpoints Plex -n PVR

Browse to the respective IP address (http://:32400/web) and follow instructions.

4.8.4) Radarr (movie management)

kubectl apply -f services/PVR/deploy-Radarr.yml

4.8.5) Readarr (book management)

kubectl apply -f services/PVR/deploy-Readarr.yml

4.8.6) SABnzbd (download client)

kubectl apply -f services/PVR/deploy-SABnzbd.yml

4.8.7) Sonarr (tv management)

kubectl apply -f services/PVR/deploy-Sonarr.yml

4.9) Shaarli (bookmarks/notes)

kubectl apply -f services/Shaarli/deploy-Shaarli.yml

4.10) Theia (web IDE)

kubectl apply -f services/Theia/deploy-Theia.yml

4.11) Traefik-Certs-Dumper (certificate tooling)

kubectl apply -f services/TraefikCertsDumper/deploy-TraefikCertsDumper.yml

4.12) Unifi-Controller (wlan AP management)

kubectl apply -f services/Unifi/deploy-Unifi.yml

Change STUN port to non-default:

kubectl exec --namespace unifi -it unifi-<uuid> -- /bin/bash
sed -e 's/# unifi.stun.port=3478/unifi.stun.port=3479/' -i /data/system.properties
exit
kubectl rollout restart deployment --namespace unifi unifi

Update STUN url on devices: doesn't seem to work

ssh <username>@<ipaddress>
sed -e 's|stun://<ipaddress>|stun://<ipaddress>:3479|' -i /etc/persistent/cfg/mgmt

5) Miscellaneous

Various notes/useful links

Replacement for not-yet-deprecated kubectl get all -A:

kubectl get $(kubectl api-resources --verbs=list -o name | paste -sd, -) --ignore-not-found --all-namespaces

DaemonSet to configure nodes' sysctl fs.inotify.max-user-watches:

kubectl apply -f system/InotifyMaxWatchers/daemonSet-InotifyMaxWatchers.yml

Debug DNS lookups within the cluster:

kubectl run -it --rm dnsutils --restart=Never --image=gcr.io/kubernetes-e2e-test-images/dnsutils -- nslookup [-debug] [fqdn]

kubectl run -it --rm busybox --restart=Never --image=busybox:1.28 -- nslookup api.github.com [-debug] [fqdn]

Delete namespaces stuck in Terminating state:

kubectl get namespace <name> -o json | jq -j '.spec.finalizers=null' > tmp.json
kubectl replace --raw "/api/v1/namespaces/<name>/finalize" -f ./tmp.json
rm ./tmp.json

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