Add k8s-node v1.21 image.

Signed-off-by: Cesar Talledo <[email protected]>

k8s-node-test/Dockerfile

@@ -17,9 +17,9 @@
 # $ docker buildx build --platform linux/amd64,linux/arm64 -t ghcr.io/nestybox/k8s-node-test:v1.20.2 --push .
 #
 
-FROM ghcr.io/nestybox/k8s-node:v1.20.2
+FROM ghcr.io/nestybox/k8s-node:v1.21.12
 
-ARG k8s_version=v1.20.2
+ARG k8s_version=v1.21.12
 
 # Debug/Testing utilities
 RUN apt-get update && apt-get install --no-install-recommends -y \
@@ -35,4 +35,3 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
     tcpdump \
     bridge-utils \
     && rm -rf /var/lib/apt/lists/*
-

k8s-node/1.21/Dockerfile

@@ -0,0 +1,92 @@
+# Sample Kubernetes (K8s) node system container image.
+#
+# Containers deployed with this image acts as K8s nodes.
+#
+# The image creates a container that includes systemd, kubeadm, docker, and all
+# k8s control plane pod images (apiserver, kubeproxy, etc.).
+#
+# You must deploy the container with the Sysbox container runtime (see below).
+#
+# NOTE: BUILDING THIS IMAGE REQUIRES CONFIGURING SYSBOX-RUNC AS DOCKER'S DEFAULT
+#       RUNTIME DURING THE BUILD.
+#
+# $ sudo more /etc/docker/daemon.json
+#{
+#    "default-runtime": "sysbox-runc",
+#    "runtimes": {
+#        "sysbox-runc": {
+#            "path": "/usr/bin/sysbox-runc"
+#        }
+#    }
+#}
+#
+# $ sudo systemctl restart docker
+# $ docker build -t nestybox/k8s-node:<k8s_version> .
+#
+# E.g.,
+#
+# $ docker build -t nestybox/k8s-node:v1.21.12 .
+#
+# Once the build completes, you can revert the default runtime config if you wish.
+#
+# Deploy k8s-node containers with:
+#
+# $ docker run --runtime=sysbox-runc --rm -d --name k8s-master nestybox/k8s-node:v1.21.12
+# $ docker run --runtime=sysbox-runc --rm -d --name k8s-worker-0 nestybox/k8s-node:v1.21.12
+# $ docker run --runtime=sysbox-runc --rm -d --name k8s-worker-1 nestybox/k8s-node:v1.21.12
+# ...
+#
+# Then run 'kubeadm init' in them just as you would on a physical host or VM.
+
+FROM nestybox/ubuntu-focal-systemd:latest
+
+ARG k8s_version=v1.21.12
+
+# Install Docker.
+RUN apt-get update && apt-get install --no-install-recommends -y                        \
+       apt-transport-https                                                              \
+       ca-certificates                                                                  \
+       curl                                                                             \
+       gnupg-agent                                                                      \
+       software-properties-common                                                       \
+    && curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -          \
+    && apt-key fingerprint 0EBFCD88                                                     \
+    && add-apt-repository                                                               \
+       "deb [arch=amd64] https://download.docker.com/linux/ubuntu                       \
+       $(lsb_release -cs)                                                               \
+       stable"                                                                          \
+    && apt-get update                                                                   \
+    && apt-get install --no-install-recommends -y docker-ce docker-ce-cli containerd.io \
+    && rm -rf /var/lib/apt/lists/*                                                      \
+    # Add user "admin" to the Docker group                                              \
+    && usermod -a -G docker admin
+
+
+# Install Kubeadm.
+#
+# Note: we use kubeadm for Ubuntu Xenial because a version for Bionic is not available;
+# see https://packages.cloud.google.com/apt/dists/
+RUN curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add    \
+    && apt-add-repository "deb http://apt.kubernetes.io/ kubernetes-xenial main"        \
+    && apt-get update && apt-get install --no-install-recommends -y                     \
+    kubeadm="${k8s_version#v}"-00 \
+    kubelet="${k8s_version#v}"-00 \
+    kubectl="${k8s_version#v}"-00 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Preload k8s control plane container images into the sys container image.
+COPY kube-pull.sh /usr/bin/
+RUN chmod +x /usr/bin/kube-pull.sh && kube-pull.sh $k8s_version && rm /usr/bin/kube-pull.sh
+
+# Docker daemon config.
+COPY daemon.json /etc/docker/
+
+# bash completion
+RUN apt-get update                                                             \
+    && mkdir -p /etc/bash_completion.d                                         \
+    && apt-get install bash-completion                                         \
+    && rm -rf /var/lib/apt/lists/*                                             \
+    && echo "source /etc/profile.d/bash_completion.sh" >> /root/.bashrc        \
+    && echo "source <(kubectl completion bash)" >> /root/.bashrc               \
+    && echo "source /etc/profile.d/bash_completion.sh" >> /home/admin/.bashrc  \
+    && echo "source <(kubectl completion bash)" >> /home/admin/.bashrc

k8s-node/1.21/daemon.json

@@ -0,0 +1,3 @@
+{
+  "exec-opts": ["native.cgroupdriver=systemd"]
+}

k8s-node/1.21/kube-pull.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+#
+# Runs inside the K8s node system container; requests kubeadm to pull K8s
+# control-plane components.
+#
+
+usage() {
+  echo "\nUsage: $0 <k8s-version>\n"
+  echo "E.g., $0 v1.18.2"
+}
+
+if [ "$#" -ne 1 ]; then
+    echo "Invalid number of arguments. Expect 1, got $#".
+    usage
+    exit 1
+fi
+
+k8s_version=$1
+
+# start dockerd
+dockerd > /var/log/dockerd.log 2>&1 &
+dockerd_pid=$!
+sleep 2
+
+# pull inner images
+kubeadm config images pull --kubernetes-version=$k8s_version
+# flannel cni
+docker image pull quay.io/coreos/flannel:v0.12.0-amd64
+# weaveNet cni
+docker image pull docker.io/weaveworks/weave-kube:2.8.1
+docker image pull docker.io/weaveworks/weave-npc:2.8.1
+# calico cni
+docker image pull quay.io/tigera/operator:v1.17.2
+
+# stop dockerd (remove the .pid file as otherwise it may prevent
+# dockerd from launching correctly inside the sys container)
+kill $dockerd_pid
+rm -f /var/run/docker.pid