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|
{ system ? builtins.currentSystem, pkgs ? import <nixpkgs> { 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, ... }: {
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 'coredns.*1/1'");
# 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 'coredns.*1/1'");
# 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);
}
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