{ system ? builtins.currentSystem, pkgs ? import { inherit system; } }: with import ./base.nix { inherit system; }; let domain = "my.zyx"; certs = import ./certs.nix { externalDomain = domain; kubelets = [ "machine1" "machine2" ]; }; redisPod = pkgs.writeText "redis-pod.json" (builtins.toJSON { kind = "Pod"; apiVersion = "v1"; metadata.name = "redis"; metadata.labels.name = "redis"; spec.containers = [{ name = "redis"; image = "redis"; args = ["--bind" "0.0.0.0"]; imagePullPolicy = "Never"; ports = [{ name = "redis-server"; containerPort = 6379; }]; }]; }); redisService = pkgs.writeText "redis-service.json" (builtins.toJSON { kind = "Service"; apiVersion = "v1"; metadata.name = "redis"; spec = { ports = [{port = 6379; targetPort = 6379;}]; selector = {name = "redis";}; }; }); redisImage = pkgs.dockerTools.buildImage { name = "redis"; tag = "latest"; contents = [ pkgs.redis pkgs.bind.host ]; config.Entrypoint = "/bin/redis-server"; }; probePod = pkgs.writeText "probe-pod.json" (builtins.toJSON { kind = "Pod"; apiVersion = "v1"; metadata.name = "probe"; metadata.labels.name = "probe"; spec.containers = [{ name = "probe"; image = "probe"; args = [ "-f" ]; tty = true; imagePullPolicy = "Never"; }]; }); probeImage = pkgs.dockerTools.buildImage { name = "probe"; tag = "latest"; contents = [ pkgs.bind.host pkgs.busybox ]; config.Entrypoint = "/bin/tail"; }; extraConfiguration = { config, pkgs, lib, nodes, ... }: { environment.systemPackages = [ pkgs.bind.host ]; # virtualisation.docker.extraOptions = "--dns=${config.services.kubernetes.addons.dns.clusterIp}"; services.dnsmasq.enable = true; services.dnsmasq.servers = [ "/cluster.local/${config.services.kubernetes.addons.dns.clusterIp}#53" ]; }; base = { name = "dns"; inherit domain certs extraConfiguration; }; singleNodeTest = { test = '' # prepare machine1 for test $machine1->waitUntilSucceeds("kubectl get node machine1.${domain} | grep -w Ready"); $machine1->execute("docker load < ${redisImage}"); $machine1->waitUntilSucceeds("kubectl create -f ${redisPod}"); $machine1->waitUntilSucceeds("kubectl create -f ${redisService}"); $machine1->execute("docker load < ${probeImage}"); $machine1->waitUntilSucceeds("kubectl create -f ${probePod}"); # check if pods are running $machine1->waitUntilSucceeds("kubectl get pod redis | grep Running"); $machine1->waitUntilSucceeds("kubectl get pod probe | grep Running"); $machine1->waitUntilSucceeds("kubectl get pods -n kube-system | grep 'kube-dns.*3/3'"); # check dns on host (dnsmasq) $machine1->succeed("host redis.default.svc.cluster.local"); # check dns inside the container $machine1->succeed("kubectl exec -ti probe -- /bin/host redis.default.svc.cluster.local"); ''; }; multiNodeTest = { test = '' # prepare machines for test $machine1->waitUntilSucceeds("kubectl get node machine1.${domain} | grep -w Ready"); $machine1->waitUntilSucceeds("kubectl get node machine2.${domain} | grep -w Ready"); $machine2->execute("docker load < ${redisImage}"); $machine1->waitUntilSucceeds("kubectl create -f ${redisPod}"); $machine1->waitUntilSucceeds("kubectl create -f ${redisService}"); $machine2->execute("docker load < ${probeImage}"); $machine1->waitUntilSucceeds("kubectl create -f ${probePod}"); # check if pods are running $machine1->waitUntilSucceeds("kubectl get pod redis | grep Running"); $machine1->waitUntilSucceeds("kubectl get pod probe | grep Running"); $machine1->waitUntilSucceeds("kubectl get pods -n kube-system | grep 'kube-dns.*3/3'"); # check dns on hosts (dnsmasq) $machine1->succeed("host redis.default.svc.cluster.local"); $machine2->succeed("host redis.default.svc.cluster.local"); # check dns inside the container $machine1->succeed("kubectl exec -ti probe -- /bin/host redis.default.svc.cluster.local"); ''; }; in { singlenode = mkKubernetesSingleNodeTest (base // singleNodeTest); multinode = mkKubernetesMultiNodeTest (base // multiNodeTest); }