99 lines
2.4 KiB
Nix
99 lines
2.4 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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top = config.services.kubernetes;
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cfg = top.flannel;
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# we want flannel to use kubernetes itself as configuration backend, not direct etcd
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storageBackend = "kubernetes";
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in
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{
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###### interface
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options.services.kubernetes.flannel = {
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enable = mkEnableOption (lib.mdDoc "enable flannel networking");
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};
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###### implementation
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config = mkIf cfg.enable {
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services.flannel = {
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enable = mkDefault true;
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network = mkDefault top.clusterCidr;
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inherit storageBackend;
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nodeName = config.services.kubernetes.kubelet.hostname;
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};
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services.kubernetes.kubelet = {
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cni.config = mkDefault [{
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name = "mynet";
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type = "flannel";
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cniVersion = "0.3.1";
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delegate = {
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isDefaultGateway = true;
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bridge = "mynet";
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};
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}];
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};
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networking = {
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firewall.allowedUDPPorts = [
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8285 # flannel udp
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8472 # flannel vxlan
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];
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dhcpcd.denyInterfaces = [ "mynet*" "flannel*" ];
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};
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services.kubernetes.pki.certs = {
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flannelClient = top.lib.mkCert {
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name = "flannel-client";
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CN = "flannel-client";
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action = "systemctl restart flannel.service";
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};
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};
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# give flannel som kubernetes rbac permissions if applicable
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services.kubernetes.addonManager.bootstrapAddons = mkIf ((storageBackend == "kubernetes") && (elem "RBAC" top.apiserver.authorizationMode)) {
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flannel-cr = {
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apiVersion = "rbac.authorization.k8s.io/v1";
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kind = "ClusterRole";
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metadata = { name = "flannel"; };
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rules = [{
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apiGroups = [ "" ];
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resources = [ "pods" ];
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verbs = [ "get" ];
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}
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{
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apiGroups = [ "" ];
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resources = [ "nodes" ];
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verbs = [ "list" "watch" ];
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}
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{
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apiGroups = [ "" ];
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resources = [ "nodes/status" ];
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verbs = [ "patch" ];
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}];
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};
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flannel-crb = {
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apiVersion = "rbac.authorization.k8s.io/v1";
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kind = "ClusterRoleBinding";
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metadata = { name = "flannel"; };
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roleRef = {
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apiGroup = "rbac.authorization.k8s.io";
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kind = "ClusterRole";
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name = "flannel";
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};
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subjects = [{
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kind = "User";
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name = "flannel-client";
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}];
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};
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};
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};
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meta.buildDocsInSandbox = false;
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}
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