Create k0s template

templates/README.md

@@ -55,6 +55,7 @@ Container image builders:
 
 Container orchestration:
 - [`faasd`](./faasd.yaml): [Faasd](https://docs.openfaas.com/deployment/edge/)
+- [`k0s`](./k0s.yaml): [k0s](https://k0sproject.io/) Zero Friction Kubernetes
 - [`k3s`](./k3s.yaml): Kubernetes via k3s
 - [`k8s`](./k8s.yaml): Kubernetes via kubeadm
 - [`experimental/u7s`](./experimental/u7s.yaml): [Usernetes](https://github.com/rootless-containers/usernetes): Rootless Kubernetes

templates/k0s.yaml

@@ -0,0 +1,69 @@
+# Deploy kubernetes via k0s (which installs a bundled containerd).
+# $ limactl start ./k0s.yaml
+# $ limactl shell k0s kubectl
+#
+# It can be accessed from the host by exporting the kubeconfig file;
+# the ports are already forwarded automatically by lima:
+#
+# $ export KUBECONFIG=$(limactl list k0s --format 'unix://{{.Dir}}/copied-from-guest/kubeconfig.yaml')
+# $ kubectl get no
+# NAME       STATUS   ROLES                  AGE   VERSION
+#  lima-k0s   Ready    control-plane   2m48s   v1.33.2+k0s
+
+minimumLimaVersion: 1.1.0
+
+base: template://_images/ubuntu-lts
+
+# Mounts are disabled in this template, but can be enabled optionally.
+mounts: []
+
+# containerd is managed by k0s, not by Lima, so the values are set to false here.
+containerd:
+  system: false
+  user: false
+
+provision:
+- mode: system
+  script: |
+    #!/bin/bash
+    set -eux -o pipefail
+    command -v k0s >/dev/null 2>&1 && exit 0
+
+    # install k0s prerequisites
+    curl -sfL https://get.k0s.sh | sh
+
+- mode: system
+  script: |
+    #!/bin/bash
+    set -eux -o pipefail
+
+    #  start k0s as a single node cluster
+    if ! systemctl status k0scontroller >/dev/null 2>&1; then
+      k0s install controller --single
+    fi
+
+    systemctl start k0scontroller
+
+probes:
+- description: "k0s to be running"
+  script: |
+    #!/bin/bash
+    set -eux -o pipefail
+    if ! timeout 30s bash -c "until sudo test -f /var/lib/k0s/pki/admin.conf; do sleep 3; done"; then
+      echo >&2 "k0s kubeconfig file has not yet been created"
+      exit 1
+    fi
+  hint: |
+    The k0s control plane is not ready yet.
+    Run "limactl shell k0s sudo journalctl -u k0scontroller" to debug.
+
+copyToHost:
+- guest: "/var/lib/k0s/pki/admin.conf"
+  host: "{{.Dir}}/copied-from-guest/kubeconfig.yaml"
+  deleteOnStop: true
+message: |
+  To run `kubectl` on the host (assumes kubectl is installed), run the following commands:
+  ------
+  export KUBECONFIG="{{.Dir}}/copied-from-guest/kubeconfig.yaml"
+  kubectl ...
+  ------