mirror of
https://github.com/linuxkit/linuxkit.git
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78 lines
2.6 KiB
Ruby
78 lines
2.6 KiB
Ruby
import 'common.rb'
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from "alpine:edge"
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def install_node_dependencies
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kube_release_artefacts = "https://dl.k8s.io/#{@versions[:kubernetes]}/bin/linux/amd64"
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cni_release_artefacts = "https://dl.k8s.io/network-plugins/cni-amd64-#{@versions[:cni]}.tar.gz"
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weave_launcher = "https://cloud.weave.works/k8s/v1.6/net?v=#{@versions[:weave]}"
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download_files = [
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'/etc/weave.yaml' => {
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url: weave_launcher,
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mode: '0644',
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},
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'/tmp/cni.tgz' => {
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url: cni_release_artefacts,
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mode: '0644',
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},
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'/usr/bin/kubelet' => {
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url: "#{kube_release_artefacts}/kubelet",
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mode: '0755',
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},
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'/usr/bin/kubeadm' => {
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url: "#{kube_release_artefacts}/kubeadm",
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mode: '0755',
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},
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'/usr/bin/kubectl' => {
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url: "#{kube_release_artefacts}/kubectl",
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mode: '0755',
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},
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]
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download_files.each do |file|
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file.each do |dest,info|
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run %(curl --output "#{dest}" --fail --silent --location "#{info[:url]}")
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run %(chmod "#{info[:mode]}" "#{dest}")
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end
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end
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run "mkdir -p /opt/cni/bin /etc/cni/net.d && tar xzf /tmp/cni.tgz -C /opt/cni && rm -f /tmp/cni.tgz"
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end
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def kubelet_cmd
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%w(
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kubelet
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--kubeconfig=/var/lib/kubeadm/kubelet.conf --require-kubeconfig=true
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--pod-manifest-path=/var/lib/kubeadm/manifests --allow-privileged=true
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--cluster-dns=10.96.0.10 --cluster-domain=cluster.local
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--cgroups-per-qos=false --enforce-node-allocatable=""
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--network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin
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)
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end
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kubelet_dependencies = %w(libc6-compat util-linux iproute2 iptables ebtables ethtool socat curl)
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install_packages kubelet_dependencies
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install_node_dependencies
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# Exploit shared mounts, give CNI paths back to the host
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mount_cni_dirs = [
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mount_bind("/opt/cni", "/rootfs/opt/cni"),
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mount_bind("/etc/cni", "/rootfs/etc/cni"),
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]
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# At the moment we trigger `kubeadm init` manually on the master, then start nodes which expect `kubeadm join` args in metadata volume
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wait_for_node_metadata_or_sleep_until_master_init = "[ ! -e /dev/sr0 ] && sleep 1 || (mount -o ro /dev/sr0 /mnt && kubeadm join --skip-preflight-checks \\\$(cat /mnt/config))"
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create_shell_wrapper "#{mount_cni_dirs.join(' && ')} && until #{kubelet_cmd.join(' ')} ; do #{wait_for_node_metadata_or_sleep_until_master_init} ; done", '/usr/bin/kubelet.sh'
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create_shell_wrapper "kubeadm init --skip-preflight-checks --kubernetes-version #{@versions[:kubernetes]} && kubectl create -n kube-system -f /etc/weave.yaml", '/usr/bin/kubeadm-init.sh'
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flatten
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env KUBECONFIG: "/etc/kubernetes/admin.conf"
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set_exec entrypoint: %w(kubelet.sh)
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tag "#{@image_name}:latest"
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