Secure certificates after generation

This commit is contained in:
Jonas Juselius
2019-02-23 15:34:28 +01:00
parent cce9aa825b
commit 66d29be22c
19 changed files with 2098 additions and 144 deletions

View File

@@ -27,17 +27,23 @@
security.rtkit.enable = true;
disabledModules = [ "services/cluster/kubernetes/default.nix" ];
disabledModules = [
# "services/cluster/kubernetes/default.nix"
"services/cluster/kubernetes/dns.nix"
"services/cluster/kubernetes/dashboard.nix"
];
imports = [
./users.nix
./packages.nix
./overlays/kubernetes.nix
./overlays/dns.nix
./overlays/dashboard.nix
# ./overlays/kubernetes.nix
];
nixpkgs.overlays = [
(import ./overlays/overlays.nix)
];
# nixpkgs.overlays = [
# (import ./overlays/overlays.nix)
# ];
users.extraUsers.root.openssh.authorizedKeys.keys = [
"ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKiAS30ZO+wgfAqDE9Y7VhRunn2QszPHA5voUwo+fGOf jonas"

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@@ -0,0 +1,21 @@
# Do not modify this file! It was generated by nixos-generate-config
# and may be overwritten by future invocations. Please make changes
# to /etc/nixos/configuration.nix instead.
{ config, lib, pkgs, ... }:
{
imports = [ ];
boot.initrd.availableKernelModules = [ "ata_piix" "mptspi" "floppy" "sd_mod" "sr_mod" ];
boot.kernelModules = [ ];
boot.extraModulePackages = [ ];
fileSystems."/" =
{ device = "/dev/disk/by-uuid/83bb471d-1db7-4c0b-b8aa-8111730a1ea9";
fsType = "ext4";
};
swapDevices = [ ];
nix.maxJobs = lib.mkDefault 1;
}

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@@ -0,0 +1,330 @@
{ config, pkgs, lib, ... }:
with lib;
let
cfg = config.services.kubernetes.addons.dashboard;
in {
options.services.kubernetes.addons.dashboard = {
enable = mkEnableOption "kubernetes dashboard addon";
rbac = mkOption {
description = "Role-based access control (RBAC) options";
default = {};
type = types.submodule {
options = {
enable = mkOption {
description = "Whether to enable role based access control is enabled for kubernetes dashboard";
type = types.bool;
default = elem "RBAC" config.services.kubernetes.apiserver.authorizationMode;
};
clusterAdmin = mkOption {
description = "Whether to assign cluster admin rights to the kubernetes dashboard";
type = types.bool;
default = false;
};
};
};
};
version = mkOption {
description = "Which version of the kubernetes dashboard to deploy";
type = types.str;
default = "v1.8.3";
};
image = mkOption {
description = "Docker image to seed for the kubernetes dashboard container.";
type = types.attrs;
default = {
imageName = "k8s.gcr.io/kubernetes-dashboard-amd64";
imageDigest = "sha256:dc4026c1b595435ef5527ca598e1e9c4343076926d7d62b365c44831395adbd0";
finalImageTag = cfg.version;
sha256 = "18ajcg0q1vignfjk2sm4xj4wzphfz8wah69ps8dklqfvv0164mc8";
};
};
tokenTtl = mkOption {
description = "Expiration time (in seconds) of JWE tokens generated by dashboard. Default: 15 min. 0 - never expires.";
type = types.int;
default = 15;
};
};
config = mkIf cfg.enable {
services.kubernetes.kubelet.seedDockerImages = [(pkgs.dockerTools.pullImage cfg.image)];
services.kubernetes.addonManager.addons = {
kubernetes-dashboard-deployment = {
kind = "Deployment";
apiVersion = "apps/v1";
metadata = {
labels = {
k8s-addon = "kubernetes-dashboard.addons.k8s.io";
k8s-app = "kubernetes-dashboard";
version = cfg.version;
"kubernetes.io/cluster-service" = "true";
"addonmanager.kubernetes.io/mode" = "Reconcile";
};
name = "kubernetes-dashboard";
namespace = "kube-system";
};
spec = {
replicas = 1;
revisionHistoryLimit = 10;
selector.matchLabels."k8s-app" = "kubernetes-dashboard";
template = {
metadata = {
labels = {
k8s-addon = "kubernetes-dashboard.addons.k8s.io";
k8s-app = "kubernetes-dashboard";
version = cfg.version;
"kubernetes.io/cluster-service" = "true";
};
annotations = {
"scheduler.alpha.kubernetes.io/critical-pod" = "";
};
};
spec = {
priorityClassName = "system-cluster-critical";
containers = [{
name = "kubernetes-dashboard";
image = with cfg.image; "${imageName}:${finalImageTag}";
ports = [{
containerPort = 8443;
protocol = "TCP";
}];
resources = {
limits = {
cpu = "100m";
memory = "300Mi";
};
requests = {
cpu = "100m";
memory = "100Mi";
};
};
args = [
"--auto-generate-certificates"
"--token-ttl=${toString cfg.tokenTtl}"
];
volumeMounts = [{
name = "tmp-volume";
mountPath = "/tmp";
} {
name = "kubernetes-dashboard-certs";
mountPath = "/certs";
}];
livenessProbe = {
httpGet = {
scheme = "HTTPS";
path = "/";
port = 8443;
};
initialDelaySeconds = 30;
timeoutSeconds = 30;
};
}];
volumes = [{
name = "kubernetes-dashboard-certs";
secret = {
secretName = "kubernetes-dashboard-certs";
};
} {
name = "tmp-volume";
emptyDir = {};
}];
serviceAccountName = "kubernetes-dashboard";
tolerations = [{
key = "node-role.kubernetes.io/master";
effect = "NoSchedule";
} {
key = "CriticalAddonsOnly";
operator = "Exists";
}];
};
};
};
};
kubernetes-dashboard-svc = {
apiVersion = "v1";
kind = "Service";
metadata = {
labels = {
k8s-addon = "kubernetes-dashboard.addons.k8s.io";
k8s-app = "kubernetes-dashboard";
"kubernetes.io/cluster-service" = "true";
"kubernetes.io/name" = "KubeDashboard";
"addonmanager.kubernetes.io/mode" = "Reconcile";
};
name = "kubernetes-dashboard";
namespace = "kube-system";
};
spec = {
ports = [{
port = 443;
targetPort = 8443;
}];
selector.k8s-app = "kubernetes-dashboard";
};
};
kubernetes-dashboard-sa = {
apiVersion = "v1";
kind = "ServiceAccount";
metadata = {
labels = {
k8s-app = "kubernetes-dashboard";
k8s-addon = "kubernetes-dashboard.addons.k8s.io";
"addonmanager.kubernetes.io/mode" = "Reconcile";
};
name = "kubernetes-dashboard";
namespace = "kube-system";
};
};
kubernetes-dashboard-sec-certs = {
apiVersion = "v1";
kind = "Secret";
metadata = {
labels = {
k8s-app = "kubernetes-dashboard";
# Allows editing resource and makes sure it is created first.
"addonmanager.kubernetes.io/mode" = "EnsureExists";
};
name = "kubernetes-dashboard-certs";
namespace = "kube-system";
};
type = "Opaque";
};
kubernetes-dashboard-sec-kholder = {
apiVersion = "v1";
kind = "Secret";
metadata = {
labels = {
k8s-app = "kubernetes-dashboard";
# Allows editing resource and makes sure it is created first.
"addonmanager.kubernetes.io/mode" = "EnsureExists";
};
name = "kubernetes-dashboard-key-holder";
namespace = "kube-system";
};
type = "Opaque";
};
kubernetes-dashboard-cm = {
apiVersion = "v1";
kind = "ConfigMap";
metadata = {
labels = {
k8s-app = "kubernetes-dashboard";
# Allows editing resource and makes sure it is created first.
"addonmanager.kubernetes.io/mode" = "EnsureExists";
};
name = "kubernetes-dashboard-settings";
namespace = "kube-system";
};
};
} // (optionalAttrs cfg.rbac.enable
(let
subjects = [{
kind = "ServiceAccount";
name = "kubernetes-dashboard";
namespace = "kube-system";
}];
labels = {
k8s-app = "kubernetes-dashboard";
k8s-addon = "kubernetes-dashboard.addons.k8s.io";
"addonmanager.kubernetes.io/mode" = "Reconcile";
};
in
(if cfg.rbac.clusterAdmin then {
kubernetes-dashboard-crb = {
apiVersion = "rbac.authorization.k8s.io/v1";
kind = "ClusterRoleBinding";
metadata = {
name = "kubernetes-dashboard";
inherit labels;
};
roleRef = {
apiGroup = "rbac.authorization.k8s.io";
kind = "ClusterRole";
name = "cluster-admin";
};
inherit subjects;
};
}
else
{
# Upstream role- and rolebinding as per:
# https://raw.githubusercontent.com/kubernetes/dashboard/master/src/deploy/alternative/kubernetes-dashboard.yaml
kubernetes-dashboard-role = {
apiVersion = "rbac.authorization.k8s.io/v1";
kind = "Role";
metadata = {
name = "kubernetes-dashboard-minimal";
namespace = "kube-system";
inherit labels;
};
rules = [
# Allow Dashboard to create 'kubernetes-dashboard-key-holder' secret.
{
apiGroups = [""];
resources = ["secrets"];
verbs = ["create"];
}
# Allow Dashboard to create 'kubernetes-dashboard-settings' config map.
{
apiGroups = [""];
resources = ["configmaps"];
verbs = ["create"];
}
# Allow Dashboard to get, update and delete Dashboard exclusive secrets.
{
apiGroups = [""];
resources = ["secrets"];
resourceNames = ["kubernetes-dashboard-key-holder"];
verbs = ["get" "update" "delete"];
}
# Allow Dashboard to get and update 'kubernetes-dashboard-settings' config map.
{
apiGroups = [""];
resources = ["configmaps"];
resourceNames = ["kubernetes-dashboard-settings"];
verbs = ["get" "update"];
}
# Allow Dashboard to get metrics from heapster.
{
apiGroups = [""];
resources = ["services"];
resourceNames = ["heapster"];
verbs = ["proxy"];
}
{
apiGroups = [""];
resources = ["services/proxy"];
resourceNames = ["heapster" "http:heapster:" "https:heapster:"];
verbs = ["get"];
}
];
};
kubernetes-dashboard-rb = {
apiVersion = "rbac.authorization.k8s.io/v1";
kind = "RoleBinding";
metadata = {
name = "kubernetes-dashboard-minimal";
namespace = "kube-system";
inherit labels;
};
roleRef = {
apiGroup = "rbac.authorization.k8s.io";
kind = "Role";
name = "kubernetes-dashboard-minimal";
};
inherit subjects;
};
})
));
};
}

329
nixos/overlays/dns.nix Normal file
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@@ -0,0 +1,329 @@
{ config, pkgs, lib, ... }:
with lib;
let
version = "1.2.5";
cfg = config.services.kubernetes.addons.dns;
ports = {
dns = 10053;
health = 10054;
metrics = 10055;
};
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;
};
replicas = mkOption {
description = "Number of DNS pod replicas to deploy in the cluster.";
default = 2;
type = types.int;
};
reconcileMode = mkOption {
description = ''
Controls the addon manager reconciliation mode for the DNS addon.
See: <link xlink:href="https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/addon-manager/README.md"/>
'';
default = "Reconcile";
type = types.enum [ "Reconcile" "EnsureExists" ];
};
coredns = mkOption {
description = "Docker image to seed for the CoreDNS container.";
type = types.attrs;
default = {
imageName = "coredns/coredns";
imageDigest = "sha256:33c8da20b887ae12433ec5c40bfddefbbfa233d5ce11fb067122e68af30291d6";
finalImageTag = version;
sha256 = "13q19rgwapv27xcs664dw502254yw4zw63insf6g2danidv2mg6i";
};
};
};
config = mkIf cfg.enable {
services.kubernetes.kubelet.seedDockerImages =
singleton (pkgs.dockerTools.pullImage cfg.coredns);
services.kubernetes.addonManager.addons = {
coredns-sa = {
apiVersion = "v1";
kind = "ServiceAccount";
metadata = {
labels = {
"addonmanager.kubernetes.io/mode" = "Reconcile";
"k8s-app" = "kube-dns";
"kubernetes.io/cluster-service" = "true";
};
name = "coredns";
namespace = "kube-system";
};
};
coredns-cr = {
apiVersion = "rbac.authorization.k8s.io/v1beta1";
kind = "ClusterRole";
metadata = {
labels = {
"addonmanager.kubernetes.io/mode" = "Reconcile";
"k8s-app" = "kube-dns";
"kubernetes.io/cluster-service" = "true";
"kubernetes.io/bootstrapping" = "rbac-defaults";
};
name = "system:coredns";
};
rules = [
{
apiGroups = [ "" ];
resources = [ "endpoints" "services" "pods" "namespaces" ];
verbs = [ "list" "watch" ];
}
{
apiGroups = [ "" ];
resources = [ "nodes" ];
verbs = [ "get" ];
}
];
};
coredns-crb = {
apiVersion = "rbac.authorization.k8s.io/v1beta1";
kind = "ClusterRoleBinding";
metadata = {
annotations = {
"rbac.authorization.kubernetes.io/autoupdate" = "true";
};
labels = {
"addonmanager.kubernetes.io/mode" = "Reconcile";
"k8s-app" = "kube-dns";
"kubernetes.io/cluster-service" = "true";
"kubernetes.io/bootstrapping" = "rbac-defaults";
};
name = "system:coredns";
};
roleRef = {
apiGroup = "rbac.authorization.k8s.io";
kind = "ClusterRole";
name = "system:coredns";
};
subjects = [
{
kind = "ServiceAccount";
name = "coredns";
namespace = "kube-system";
}
];
};
coredns-cm = {
apiVersion = "v1";
kind = "ConfigMap";
metadata = {
labels = {
"addonmanager.kubernetes.io/mode" = cfg.reconcileMode;
"k8s-app" = "kube-dns";
"kubernetes.io/cluster-service" = "true";
};
name = "coredns";
namespace = "kube-system";
};
data = {
Corefile = ".:${toString ports.dns} {
errors
health :${toString ports.health}
kubernetes ${cfg.clusterDomain} in-addr.arpa ip6.arpa {
pods insecure
upstream
fallthrough in-addr.arpa ip6.arpa
}
prometheus :${toString ports.metrics}
proxy . /etc/resolv.conf
cache 30
loop
reload
loadbalance
}";
};
};
coredns-deploy = {
apiVersion = "extensions/v1beta1";
kind = "Deployment";
metadata = {
labels = {
"addonmanager.kubernetes.io/mode" = cfg.reconcileMode;
"k8s-app" = "kube-dns";
"kubernetes.io/cluster-service" = "true";
"kubernetes.io/name" = "CoreDNS";
};
name = "coredns";
namespace = "kube-system";
};
spec = {
replicas = cfg.replicas;
selector = {
matchLabels = { k8s-app = "kube-dns"; };
};
strategy = {
rollingUpdate = { maxUnavailable = 1; };
type = "RollingUpdate";
};
template = {
metadata = {
labels = {
k8s-app = "kube-dns";
};
};
spec = {
containers = [
{
args = [ "-conf" "/etc/coredns/Corefile" ];
image = with cfg.coredns; "${imageName}:${finalImageTag}";
imagePullPolicy = "Never";
livenessProbe = {
failureThreshold = 5;
httpGet = {
path = "/health";
port = ports.health;
scheme = "HTTP";
};
initialDelaySeconds = 60;
successThreshold = 1;
timeoutSeconds = 5;
};
name = "coredns";
ports = [
{
containerPort = ports.dns;
name = "dns";
protocol = "UDP";
}
{
containerPort = ports.dns;
name = "dns-tcp";
protocol = "TCP";
}
{
containerPort = ports.metrics;
name = "metrics";
protocol = "TCP";
}
];
resources = {
limits = {
memory = "170Mi";
};
requests = {
cpu = "100m";
memory = "70Mi";
};
};
securityContext = {
allowPrivilegeEscalation = false;
capabilities = {
drop = [ "all" ];
};
readOnlyRootFilesystem = true;
};
volumeMounts = [
{
mountPath = "/etc/coredns";
name = "config-volume";
readOnly = true;
}
];
}
];
dnsPolicy = "Default";
nodeSelector = {
"beta.kubernetes.io/os" = "linux";
};
serviceAccountName = "coredns";
tolerations = [
{
effect = "NoSchedule";
key = "node-role.kubernetes.io/master";
}
{
key = "CriticalAddonsOnly";
operator = "Exists";
}
];
volumes = [
{
configMap = {
items = [
{
key = "Corefile";
path = "Corefile";
}
];
name = "coredns";
};
name = "config-volume";
}
];
};
};
};
};
coredns-svc = {
apiVersion = "v1";
kind = "Service";
metadata = {
annotations = {
"prometheus.io/port" = toString ports.metrics;
"prometheus.io/scrape" = "true";
};
labels = {
"addonmanager.kubernetes.io/mode" = "Reconcile";
"k8s-app" = "kube-dns";
"kubernetes.io/cluster-service" = "true";
"kubernetes.io/name" = "CoreDNS";
};
name = "kube-dns";
namespace = "kube-system";
};
spec = {
clusterIP = cfg.clusterIp;
ports = [
{
name = "dns";
port = 53;
targetPort = ports.dns;
protocol = "UDP";
}
{
name = "dns-tcp";
port = 53;
targetPort = ports.dns;
protocol = "TCP";
}
];
selector = { k8s-app = "kube-dns"; };
};
};
};
services.kubernetes.kubelet.clusterDns = mkDefault cfg.clusterIp;
};
}

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@@ -60,7 +60,7 @@ let
cluster.server = cfg.server;
}];
users = [{
name = name';
name = "kubelet";
user = {
client-certificate = cfg.certFile;
client-key = cfg.keyFile;
@@ -69,9 +69,9 @@ let
contexts = [{
context = {
cluster = "local";
user = name';
user = "kubelet";
};
current-context = "default";
current-context = "kubelet-context";
}];
}));
@@ -630,13 +630,6 @@ in {
type = types.bool;
};
# TODO: remove this deprecated flag
cadvisorPort = mkOption {
description = "Kubernetes kubelet local cadvisor port.";
default = 4194;
type = types.int;
};
clusterDns = mkOption {
description = "Use alternative DNS.";
default = "10.1.0.1";
@@ -799,7 +792,7 @@ in {
clusterCidr = mkOption {
description = "Kubernetes controller manager and proxy CIDR Range for Pods in cluster.";
default = "10.1.0.0/16";
type = types.str;
type = types.nullOr types.str;
};
flannel.enable = mkOption {
@@ -870,7 +863,6 @@ in {
--hostname-override=${cfg.kubelet.hostname} \
--allow-privileged=${boolToString cfg.kubelet.allowPrivileged} \
--root-dir=${cfg.dataDir} \
--cadvisor_port=${toString cfg.kubelet.cadvisorPort} \
${optionalString (cfg.kubelet.clusterDns != "")
"--cluster-dns=${cfg.kubelet.clusterDns}"} \
${optionalString (cfg.kubelet.clusterDomain != "")
@@ -1034,9 +1026,9 @@ in {
${if (cfg.controllerManager.rootCaFile!=null)
then "--root-ca-file=${cfg.controllerManager.rootCaFile}"
else "--root-ca-file=/var/run/kubernetes/apiserver.crt"} \
${optionalString (cfg.clusterCidr!=null)
"--cluster-cidr=${cfg.clusterCidr}"} \
--allocate-node-cidrs=true \
${if (cfg.clusterCidr!=null)
then "--cluster-cidr=${cfg.clusterCidr} --allocate-node-cidrs=true"
else "--allocate-node-cidrs=false"} \
${optionalString (cfg.controllerManager.featureGates != [])
"--feature-gates=${concatMapStringsSep "," (feature: "${feature}=true") cfg.controllerManager.featureGates}"} \
${optionalString cfg.verbose "--v=6"} \

File diff suppressed because it is too large Load Diff

View File

@@ -1,6 +1,6 @@
self: super: {
# glusterfs = super.glusterfs.overrideAttrs (old: {
# buildInputs = old.buildInputs ++ [ self.lvm2 ];
# });
super.config.services.kubernetes = super.callPackage ./kubernetes.nix {};
super.config.services.kubernetes.addons.dns =
super.callPackage ./dns.nix {};
super.config.services.kubernetes.addons.dashboard =
super.callPackage ./dashboard.nix {};
}