# RaspberryPI setup

• install Ubuntu Server 64bit via raspberryPi Imager ** arch linux arm64 (aarch64) seems to have seldom issues running k3s port-forwarding, with or without cilium, and internal traffic

acabbia@ldcl141282m  on  main!11:56:51 π  k port-forward -n kube-system traefik-786ff64748-4vxfs 18000:80
Forwarding from 127.0.0.1:18000 -> 80
Forwarding from [::1]:18000 -> 80
Handling connection for 18000
E0110 11:57:39.031624   47090 portforward.go:400] an error occurred forwarding 18000 -> 80: error forwarding port 80 to pod b5e6e7b88286ae845a9b8e3ff121af854ebaf3f9f3039c66ac23ce3e82a6ccfc, uid : failed to execute portforward in network namespace "/var/run/netns/cni-c9e4d36b-741f-c613-7635-96135e5b93b0": failed to connect to localhost:80 inside namespace "b5e6e7b88286ae845a9b8e3ff121af854ebaf3f9f3039c66ac23ce3e82a6ccfc", IPv4: dial tcp4: lookup localhost: Try again IPv6 dial tcp6: lookup localhost: Try again 
E0110 12:02:35.955932   47090 portforward.go:233] lost connection to pod

• check Makefile apt target to install dependencies
• run k3s target to install K3s ** restart k3s.service and export kubeconfig
• add various imagePullSecrets secrets in k8s

kubectl create secret docker-registry regcred-github --docker-server=https://ghcr.io/ --docker-username=shipperizer --docker-password=<GH_PAT> --docker-email=alexcabb@gmail.com

• if using make k3s cilium will need to be installed before things work properly
• if wanted to use a public dns, add --tls-san <dns record> to have it added to the tls certificate
• if cilium is wanted look at https://docs.cilium.io/en/v1.11/gettingstarted/k3s/#install-a-master-node options

Cilium

Install linux-modules-extra-raspi on ubuntu

Follow the steps in here

to install cilium CLI and hubble CLI

curl -L --remote-name-all https://github.com/cilium/cilium-cli/releases/latest/download/cilium-linux-arm64.tar.gz{,.sha256sum}
sha256sum --check cilium-linux-arm64.tar.gz.sha256sum
sudo tar xzvfC cilium-linux-arm64.tar.gz /usr/local/bin
rm cilium-linux-arm64.tar.gz{,.sha256sum}
export HUBBLE_VERSION=$(curl -s https://raw.githubusercontent.com/cilium/hubble/master/stable.txt)
curl -L --remote-name-all https://github.com/cilium/hubble/releases/download/$HUBBLE_VERSION/hubble-linux-arm64.tar.gz{,.sha256sum}
sha256sum --check hubble-linux-arm64.tar.gz.sha256sum
sudo tar xzvfC hubble-linux-arm64.tar.gz /usr/local/bin
rm hubble-linux-arm64.tar.gz{,.sha256sum}

to install in the cluster look at the Makefile target cilium

see install requirements if having issues

mainly this if running on latest arch linux

echo 'net.ipv4.conf.lxc*.rp_filter = 0' > /etc/sysctl.d/99-override_cilium_rp_filter.conf
systemctl restart systemd-sysctl

Istio

Here we have 2 options:

• run make istio-install to get istio running via istio-operator, cni-plugin will be installed as well
• use cilium customized istio (experimental)

curl -L https://github.com/cilium/istio/releases/download/1.10.4/cilium-istioctl-1.10.4-linux-arm64.tar.gz | tar xz

** an ingress class resource will be created so that is easier to generate certs via cert-manager with the istio ingress class

** for the cm-acme-solver to work, its service port will have to be exposed via the router for the certificate challenge to be accepted, once done revert to open the gateway port 80

Cert-Manager

• Install cert-manager via kubectl apply -f https://github.com/jetstack/cert-manager/releases/download/v1.6.1/cert-manager.yaml

example of a cluster issuer:

apiVersion: cert-manager.io/v1
kind: ClusterIssuer
metadata:
  name: http-issuer
spec:
  acme:
    email: <username>
    server: https://acme-v02.api.letsencrypt.org/directory
    preferredChain: "ISRG Root X1"
    privateKeySecretRef:
      name: http-issuer-account-key
    solvers:
    - http01:
       ingress:
         class: istio

ArgoCD

• create a secret for image-updater builds, same as the one needed to pull images (which is in the default namespace):

echo '{"auths":{"ghcr.io":{"auth":"*****************"}}}' | kubectl create secret generic regcred-github --type=kubernetes.io/dockerconfigjson --from-file=.dockerconfigjson=/dev/stdin -n argocd

• port forward the service locally and follow the Getting Started guide here

• add ssh git creds for image-updater so that it can push commits

kubectl -n argocd create secret generic git-creds --from-file=sshPrivateKey=<path/to/id_rsa>

• add repos to avoid ssh agent requested but SSH_AUTH_SOCK not-specified issue

argocd repo add git@github.com:shipperizer/furry-train.git --ssh-private-key-path ~/.ssh/bomber_id_ed25519 --name furry-train
argocd repo add git@github.com:shipperizer/fluffy-octo-telegram.git --ssh-private-key-path ~/.ssh/bomber_id_ed25519 --name fluffy-octo-telegram   

and only then create the apps

Kaniko

• create a secret for kaniko builds, for this you will need an Opaque secret:

 echo '{"auths":{"ghcr.io":{"auth":"****************"}}}' | kubectl create secret generic regcred-github-kaniko --from-file=config.json=/dev/stdin

Use Contour

• disable traefik, see article here
• run skaffold run --profile contour
• make sure cert-manager is installed if you need tls ingresses
• expose envoy svc port on the router