diff options
Diffstat (limited to 'nixos/modules/services/cluster/kubernetes/addon-manager.nix')
-rw-r--r-- | nixos/modules/services/cluster/kubernetes/addon-manager.nix | 83 |
1 files changed, 79 insertions, 4 deletions
diff --git a/nixos/modules/services/cluster/kubernetes/addon-manager.nix b/nixos/modules/services/cluster/kubernetes/addon-manager.nix index 17f2dde31a71..b9a56811d2bd 100644 --- a/nixos/modules/services/cluster/kubernetes/addon-manager.nix +++ b/nixos/modules/services/cluster/kubernetes/addon-manager.nix @@ -63,18 +63,49 @@ in }; enable = mkEnableOption "Whether to enable Kubernetes addon manager."; + + kubeconfig = top.lib.mkKubeConfigOptions "Kubernetes addon manager"; + bootstrapAddonsKubeconfig = top.lib.mkKubeConfigOptions "Kubernetes addon manager bootstrap"; }; ###### implementation - config = mkIf cfg.enable { + config = let + + addonManagerPaths = filter (a: a != null) [ + cfg.kubeconfig.caFile + cfg.kubeconfig.certFile + cfg.kubeconfig.keyFile + ]; + bootstrapAddonsPaths = filter (a: a != null) [ + cfg.bootstrapAddonsKubeconfig.caFile + cfg.bootstrapAddonsKubeconfig.certFile + cfg.bootstrapAddonsKubeconfig.keyFile + ]; + + in mkIf cfg.enable { environment.etc."kubernetes/addons".source = "${addons}/"; + #TODO: Get rid of kube-addon-manager in the future for the following reasons + # - it is basically just a shell script wrapped around kubectl + # - it assumes that it is clusterAdmin or can gain clusterAdmin rights through serviceAccount + # - it is designed to be used with k8s system components only + # - it would be better with a more Nix-oriented way of managing addons systemd.services.kube-addon-manager = { description = "Kubernetes addon manager"; wantedBy = [ "kubernetes.target" ]; - after = [ "kube-apiserver.service" ]; - environment.ADDON_PATH = "/etc/kubernetes/addons/"; - path = [ pkgs.gawk ]; + after = [ "kube-node-online.target" ]; + before = [ "kubernetes.target" ]; + environment = { + ADDON_PATH = "/etc/kubernetes/addons/"; + KUBECONFIG = top.lib.mkKubeConfig "kube-addon-manager" cfg.kubeconfig; + }; + path = with pkgs; [ gawk kubectl ]; + preStart = '' + until kubectl -n kube-system get serviceaccounts/default 2>/dev/null; do + echo kubectl -n kube-system get serviceaccounts/default: exit status $? + sleep 2 + done + ''; serviceConfig = { Slice = "kubernetes.slice"; ExecStart = "${top.package}/bin/kube-addons"; @@ -84,8 +115,52 @@ in Restart = "on-failure"; RestartSec = 10; }; + unitConfig.ConditionPathExists = addonManagerPaths; }; + systemd.paths.kube-addon-manager = { + wantedBy = [ "kube-addon-manager.service" ]; + pathConfig = { + PathExists = addonManagerPaths; + PathChanged = addonManagerPaths; + }; + }; + + services.kubernetes.addonManager.kubeconfig.server = mkDefault top.apiserverAddress; + + systemd.services.kube-addon-manager-bootstrap = mkIf (top.apiserver.enable && top.addonManager.bootstrapAddons != {}) { + wantedBy = [ "kube-control-plane-online.target" ]; + after = [ "kube-apiserver.service" ]; + before = [ "kube-control-plane-online.target" ]; + path = [ pkgs.kubectl ]; + environment = { + KUBECONFIG = top.lib.mkKubeConfig "kube-addon-manager-bootstrap" cfg.bootstrapAddonsKubeconfig; + }; + preStart = with pkgs; let + files = mapAttrsToList (n: v: writeText "${n}.json" (builtins.toJSON v)) + cfg.bootstrapAddons; + in '' + until kubectl auth can-i '*' '*' -q 2>/dev/null; do + echo kubectl auth can-i '*' '*': exit status $? + sleep 2 + done + + kubectl apply -f ${concatStringsSep " \\\n -f " files} + ''; + script = "echo Ok"; + unitConfig.ConditionPathExists = bootstrapAddonsPaths; + }; + + systemd.paths.kube-addon-manager-bootstrap = { + wantedBy = [ "kube-addon-manager-bootstrap.service" ]; + pathConfig = { + PathExists = bootstrapAddonsPaths; + PathChanged = bootstrapAddonsPaths; + }; + }; + + services.kubernetes.addonManager.bootstrapAddonsKubeconfig.server = mkDefault top.apiserverAddress; + services.kubernetes.addonManager.bootstrapAddons = mkIf isRBACEnabled (let name = system:kube-addon-manager; |