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