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{ config, lib, pkgs, ... }:
with lib;
let
top = config.services.kubernetes;
cfg = top.addonManager;
isRBACEnabled = elem "RBAC" top.apiserver.authorizationMode;
addons = pkgs.runCommand "kubernetes-addons" { } ''
mkdir -p $out
# since we are mounting the addons to the addon manager, they need to be copied
${concatMapStringsSep ";" (a: "cp -v ${a}/* $out/") (mapAttrsToList (name: addon:
pkgs.writeTextDir "${name}.json" (builtins.toJSON addon)
) (cfg.addons))}
'';
in
{
###### interface
options.services.kubernetes.addonManager = with lib.types; {
bootstrapAddons = mkOption {
description = ''
Bootstrap addons are like regular addons, but they are applied with cluster-admin rigths.
They are applied at addon-manager startup only.
'';
default = { };
type = attrsOf attrs;
example = literalExpression ''
{
"my-service" = {
"apiVersion" = "v1";
"kind" = "Service";
"metadata" = {
"name" = "my-service";
"namespace" = "default";
};
"spec" = { ... };
};
}
'';
};
addons = mkOption {
description = "Kubernetes addons (any kind of Kubernetes resource can be an addon).";
default = { };
type = attrsOf (either attrs (listOf attrs));
example = literalExpression ''
{
"my-service" = {
"apiVersion" = "v1";
"kind" = "Service";
"metadata" = {
"name" = "my-service";
"namespace" = "default";
};
"spec" = { ... };
};
}
// import <nixpkgs/nixos/modules/services/cluster/kubernetes/dns.nix> { cfg = config.services.kubernetes; };
'';
};
enable = mkEnableOption "Kubernetes addon manager.";
};
###### implementation
config = mkIf cfg.enable {
environment.etc."kubernetes/addons".source = "${addons}/";
systemd.services.kube-addon-manager = {
description = "Kubernetes addon manager";
wantedBy = [ "kubernetes.target" ];
after = [ "kube-apiserver.service" ];
environment.ADDON_PATH = "/etc/kubernetes/addons/";
path = [ pkgs.gawk ];
serviceConfig = {
Slice = "kubernetes.slice";
ExecStart = "${top.package}/bin/kube-addons";
WorkingDirectory = top.dataDir;
User = "kubernetes";
Group = "kubernetes";
Restart = "on-failure";
RestartSec = 10;
};
unitConfig = {
StartLimitIntervalSec = 0;
};
};
services.kubernetes.addonManager.bootstrapAddons = mkIf isRBACEnabled
(let
name = "system:kube-addon-manager";
namespace = "kube-system";
in
{
kube-addon-manager-r = {
apiVersion = "rbac.authorization.k8s.io/v1";
kind = "Role";
metadata = {
inherit name namespace;
};
rules = [{
apiGroups = ["*"];
resources = ["*"];
verbs = ["*"];
}];
};
kube-addon-manager-rb = {
apiVersion = "rbac.authorization.k8s.io/v1";
kind = "RoleBinding";
metadata = {
inherit name namespace;
};
roleRef = {
apiGroup = "rbac.authorization.k8s.io";
kind = "Role";
inherit name;
};
subjects = [{
apiGroup = "rbac.authorization.k8s.io";
kind = "User";
inherit name;
}];
};
kube-addon-manager-cluster-lister-cr = {
apiVersion = "rbac.authorization.k8s.io/v1";
kind = "ClusterRole";
metadata = {
name = "${name}:cluster-lister";
};
rules = [{
apiGroups = ["*"];
resources = ["*"];
verbs = ["list"];
}];
};
kube-addon-manager-cluster-lister-crb = {
apiVersion = "rbac.authorization.k8s.io/v1";
kind = "ClusterRoleBinding";
metadata = {
name = "${name}:cluster-lister";
};
roleRef = {
apiGroup = "rbac.authorization.k8s.io";
kind = "ClusterRole";
name = "${name}:cluster-lister";
};
subjects = [{
kind = "User";
inherit name;
}];
};
});
services.kubernetes.pki.certs = {
addonManager = top.lib.mkCert {
name = "kube-addon-manager";
CN = "system:kube-addon-manager";
action = "systemctl restart kube-addon-manager.service";
};
};
};
meta.buildDocsInSandbox = false;
}
|