mirror of
https://github.com/edgelesssys/constellation.git
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96 lines
3.8 KiB
Go
96 lines
3.8 KiB
Go
package k8sapi
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import (
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"context"
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"fmt"
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"io/fs"
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"github.com/icholy/replace"
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"golang.org/x/text/transform"
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)
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const (
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cniPluginsDir = "/opt/cni/bin"
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binDir = "/run/state/bin"
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kubeadmPath = "/run/state/bin/kubeadm"
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kubeletPath = "/run/state/bin/kubelet"
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kubectlPath = "/run/state/bin/kubectl"
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kubeletServiceEtcPath = "/etc/systemd/system/kubelet.service"
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kubeletServiceStatePath = "/run/state/systemd/system/kubelet.service"
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kubeadmConfEtcPath = "/etc/systemd/system/kubelet.service.d/10-kubeadm.conf"
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kubeadmConfStatePath = "/run/state/systemd/system/kubelet.service.d/10-kubeadm.conf"
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executablePerm = 0o544
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systemdUnitPerm = 0o644
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)
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// versionConfigs holds download URLs for all required kubernetes components for every supported version.
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var versionConfigs map[string]kubernetesVersion = map[string]kubernetesVersion{
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"1.23.6": {
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CNIPluginsURL: "https://github.com/containernetworking/plugins/releases/download/v1.1.1/cni-plugins-linux-amd64-v1.1.1.tgz",
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CrictlURL: "https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.24.1/crictl-v1.24.1-linux-amd64.tar.gz",
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KubeletServiceURL: "https://raw.githubusercontent.com/kubernetes/release/v0.13.0/cmd/kubepkg/templates/latest/deb/kubelet/lib/systemd/system/kubelet.service",
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KubeadmConfURL: "https://raw.githubusercontent.com/kubernetes/release/v0.13.0/cmd/kubepkg/templates/latest/deb/kubeadm/10-kubeadm.conf",
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KubeletURL: "https://storage.googleapis.com/kubernetes-release/release/v1.23.6/bin/linux/amd64/kubelet",
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KubeadmURL: "https://storage.googleapis.com/kubernetes-release/release/v1.23.6/bin/linux/amd64/kubeadm",
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KubectlURL: "https://storage.googleapis.com/kubernetes-release/release/v1.23.6/bin/linux/amd64/kubectl",
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},
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}
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type kubernetesVersion struct {
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CNIPluginsURL string
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CrictlURL string
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KubeletServiceURL string
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KubeadmConfURL string
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KubeletURL string
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KubeadmURL string
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KubectlURL string
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}
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// installK8sComponents installs kubernetes components for this version.
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// reference: https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/#installing-kubeadm-kubelet-and-kubectl .
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func (k *kubernetesVersion) installK8sComponents(ctx context.Context, inst installer) error {
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if err := inst.Install(
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ctx, k.CNIPluginsURL, []string{cniPluginsDir}, executablePerm, true,
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); err != nil {
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return fmt.Errorf("failed to install cni plugins: %w", err)
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}
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if err := inst.Install(
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ctx, k.CrictlURL, []string{binDir}, executablePerm, true,
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); err != nil {
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return fmt.Errorf("failed to install crictl: %w", err)
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}
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if err := inst.Install(
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ctx, k.KubeletServiceURL, []string{kubeletServiceEtcPath, kubeletServiceStatePath}, systemdUnitPerm, false, replace.String("/usr/bin", binDir),
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); err != nil {
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return fmt.Errorf("failed to install kubelet service: %w", err)
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}
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if err := inst.Install(
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ctx, k.KubeadmConfURL, []string{kubeadmConfEtcPath, kubeadmConfStatePath}, systemdUnitPerm, false, replace.String("/usr/bin", binDir),
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); err != nil {
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return fmt.Errorf("failed to install kubeadm conf: %w", err)
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}
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if err := inst.Install(
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ctx, k.KubeletURL, []string{kubeletPath}, executablePerm, false,
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); err != nil {
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return fmt.Errorf("failed to install kubelet: %w", err)
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}
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if err := inst.Install(
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ctx, k.KubeadmURL, []string{kubeadmPath}, executablePerm, false,
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); err != nil {
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return fmt.Errorf("failed to install kubeadm: %w", err)
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}
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if err := inst.Install(
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ctx, k.KubectlURL, []string{kubectlPath}, executablePerm, false,
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); err != nil {
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return fmt.Errorf("failed to install kubectl: %w", err)
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}
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return nil
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}
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type installer interface {
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Install(
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ctx context.Context, sourceURL string, destinations []string, perm fs.FileMode,
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extract bool, transforms ...transform.Transformer,
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) error
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}
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