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|
{ config, pkgs, lib, ... }:
with lib;
let
version = "1.14.4";
k8s-dns-kube-dns = pkgs.dockerTools.pullImage {
imageName = "gcr.io/google_containers/k8s-dns-kube-dns-amd64";
finalImageTag = version;
sha256 = "0q97xfqrigrfjl2a9cxl5in619py0zv44gch09jm8gqjkxl80imp";
imageDigest = "sha256:40790881bbe9ef4ae4ff7fe8b892498eecb7fe6dcc22661402f271e03f7de344";
};
k8s-dns-dnsmasq-nanny = pkgs.dockerTools.pullImage {
imageName = "gcr.io/google_containers/k8s-dns-dnsmasq-nanny-amd64";
finalImageTag = version;
sha256 = "051w5ca4qb88mwva4hbnh9xzlsvv7k1mbk3wz50lmig2mqrqqx6c";
imageDigest = "sha256:aeeb994acbc505eabc7415187cd9edb38cbb5364dc1c2fc748154576464b3dc2";
};
k8s-dns-sidecar = pkgs.dockerTools.pullImage {
imageName = "gcr.io/google_containers/k8s-dns-sidecar-amd64";
finalImageTag = version;
sha256 = "1z0d129bcm8i2cqq36x5jhnrv9hirj8c6kjrmdav8vgf7py78vsm";
imageDigest = "sha256:97074c951046e37d3cbb98b82ae85ed15704a290cce66a8314e7f846404edde9";
};
cfg = config.services.kubernetes.addons.dns;
in {
options.services.kubernetes.addons.dns = {
enable = mkEnableOption "kubernetes dns addon";
clusterIp = mkOption {
description = "Dns addon clusterIP";
# this default is also what kubernetes users
default = (
concatStringsSep "." (
take 3 (splitString "." config.services.kubernetes.apiserver.serviceClusterIpRange
))
) + ".254";
type = types.str;
};
clusterDomain = mkOption {
description = "Dns cluster domain";
default = "cluster.local";
type = types.str;
};
};
config = mkIf cfg.enable {
services.kubernetes.kubelet.seedDockerImages = [
k8s-dns-kube-dns
k8s-dns-dnsmasq-nanny
k8s-dns-sidecar
];
services.kubernetes.addonManager.addons = {
kubedns-deployment = {
apiVersion = "apps/v1beta1";
kind = "Deployment";
metadata = {
labels = {
"addonmanager.kubernetes.io/mode" = "Reconcile";
"k8s-app" = "kube-dns";
"kubernetes.io/cluster-service" = "true";
};
name = "kube-dns";
namespace = "kube-system";
};
spec = {
selector.matchLabels."k8s-app" = "kube-dns";
strategy = {
rollingUpdate = {
maxSurge = "10%";
maxUnavailable = 0;
};
};
template = {
metadata = {
annotations."scheduler.alpha.kubernetes.io/critical-pod" = "";
labels.k8s-app = "kube-dns";
};
spec = {
containers = [
{
name = "kubedns";
args = [
"--domain=${cfg.clusterDomain}"
"--dns-port=10053"
"--config-dir=/kube-dns-config"
"--v=2"
];
env = [
{
name = "PROMETHEUS_PORT";
value = "10055";
}
];
image = "gcr.io/google_containers/k8s-dns-kube-dns-amd64:${version}";
livenessProbe = {
failureThreshold = 5;
httpGet = {
path = "/healthcheck/kubedns";
port = 10054;
scheme = "HTTP";
};
initialDelaySeconds = 60;
successThreshold = 1;
timeoutSeconds = 5;
};
ports = [
{
containerPort = 10053;
name = "dns-local";
protocol = "UDP";
}
{
containerPort = 10053;
name = "dns-tcp-local";
protocol = "TCP";
}
{
containerPort = 10055;
name = "metrics";
protocol = "TCP";
}
];
readinessProbe = {
httpGet = {
path = "/readiness";
port = 8081;
scheme = "HTTP";
};
initialDelaySeconds = 3;
timeoutSeconds = 5;
};
resources = {
limits.memory = "170Mi";
requests = {
cpu = "100m";
memory = "70Mi";
};
};
volumeMounts = [
{
mountPath = "/kube-dns-config";
name = "kube-dns-config";
}
];
}
{
args = [
"-v=2"
"-logtostderr"
"-configDir=/etc/k8s/dns/dnsmasq-nanny"
"-restartDnsmasq=true"
"--"
"-k"
"--cache-size=1000"
"--log-facility=-"
"--server=/${cfg.clusterDomain}/127.0.0.1#10053"
"--server=/in-addr.arpa/127.0.0.1#10053"
"--server=/ip6.arpa/127.0.0.1#10053"
];
image = "gcr.io/google_containers/k8s-dns-dnsmasq-nanny-amd64:${version}";
livenessProbe = {
failureThreshold = 5;
httpGet = {
path = "/healthcheck/dnsmasq";
port = 10054;
scheme = "HTTP";
};
initialDelaySeconds = 60;
successThreshold = 1;
timeoutSeconds = 5;
};
name = "dnsmasq";
ports = [
{
containerPort = 53;
name = "dns";
protocol = "UDP";
}
{
containerPort = 53;
name = "dns-tcp";
protocol = "TCP";
}
];
resources = {
requests = {
cpu = "150m";
memory = "20Mi";
};
};
volumeMounts = [
{
mountPath = "/etc/k8s/dns/dnsmasq-nanny";
name = "kube-dns-config";
}
];
}
{
name = "sidecar";
image = "gcr.io/google_containers/k8s-dns-sidecar-amd64:${version}";
args = [
"--v=2"
"--logtostderr"
"--probe=kubedns,127.0.0.1:10053,kubernetes.default.svc.${cfg.clusterDomain},5,A"
"--probe=dnsmasq,127.0.0.1:53,kubernetes.default.svc.${cfg.clusterDomain},5,A"
];
livenessProbe = {
failureThreshold = 5;
httpGet = {
path = "/metrics";
port = 10054;
scheme = "HTTP";
};
initialDelaySeconds = 60;
successThreshold = 1;
timeoutSeconds = 5;
};
ports = [
{
containerPort = 10054;
name = "metrics";
protocol = "TCP";
}
];
resources = {
requests = {
cpu = "10m";
memory = "20Mi";
};
};
}
];
dnsPolicy = "Default";
serviceAccountName = "kube-dns";
tolerations = [
{
key = "CriticalAddonsOnly";
operator = "Exists";
}
];
volumes = [
{
configMap = {
name = "kube-dns";
optional = true;
};
name = "kube-dns-config";
}
];
};
};
};
};
kubedns-svc = {
apiVersion = "v1";
kind = "Service";
metadata = {
labels = {
"addonmanager.kubernetes.io/mode" = "Reconcile";
"k8s-app" = "kube-dns";
"kubernetes.io/cluster-service" = "true";
"kubernetes.io/name" = "KubeDNS";
};
name = "kube-dns";
namespace = "kube-system";
};
spec = {
clusterIP = cfg.clusterIp;
ports = [
{name = "dns"; port = 53; protocol = "UDP";}
{name = "dns-tcp"; port = 53; protocol = "TCP";}
];
selector.k8s-app = "kube-dns";
};
};
kubedns-sa = {
apiVersion = "v1";
kind = "ServiceAccount";
metadata = {
name = "kube-dns";
namespace = "kube-system";
labels = {
"kubernetes.io/cluster-service" = "true";
"addonmanager.kubernetes.io/mode" = "Reconcile";
};
};
};
kubedns-cm = {
apiVersion = "v1";
kind = "ConfigMap";
metadata = {
name = "kube-dns";
namespace = "kube-system";
labels = {
"addonmanager.kubernetes.io/mode" = "EnsureExists";
};
};
};
};
services.kubernetes.kubelet.clusterDns = mkDefault cfg.clusterIp;
};
}
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