k8s binary components version map and install directives

Signed-off-by: Malte Poll <mp@edgeless.systems>
2024-10-01 01:36:09 -04:00 · 2022-05-19 17:13:07 +02:00 · 2022-05-19 17:13:07 +02:00 · f67cf2d31f
commit f67cf2d31f
parent 14f6985fe3
1 changed files with 95 additions and 0 deletions
--- a/coordinator/kubernetes/k8sapi/versions.go
+++ b/coordinator/kubernetes/k8sapi/versions.go
@ -0,0 +1,95 @@
+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("failed to install cni plugins: %w", err)
+	}
+	if err := inst.Install(
+		ctx, k.CrictlURL, []string{binDir}, executablePerm, true,
+	); err != nil {
+		return fmt.Errorf("failed to install 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("failed to install 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("failed to install kubeadm conf: %w", err)
+	}
+	if err := inst.Install(
+		ctx, k.KubeletURL, []string{kubeletPath}, executablePerm, false,
+	); err != nil {
+		return fmt.Errorf("failed to install kubelet: %w", err)
+	}
+	if err := inst.Install(
+		ctx, k.KubeadmURL, []string{kubeadmPath}, executablePerm, false,
+	); err != nil {
+		return fmt.Errorf("failed to install kubeadm: %w", err)
+	}
+	if err := inst.Install(
+		ctx, k.KubectlURL, []string{kubectlPath}, executablePerm, false,
+	); err != nil {
+		return fmt.Errorf("failed to install 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
+}