constellation/bootstrapper/internal/kubernetes/k8sapi/versions.go

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