/// <summary>DeleteNamespaceAsync
/// Deletes an existing Namespace from the K8s cluster asynchronously
/// </summary>
/// <param name="k8sClient">
/// Responsible for connecting to K8s cluster
/// </param>
/// <returns>
/// MTAErrorModel in case of errors
/// No Content for successfule completion
/// eithher Error or Namespace model is returned
/// </returns>
public async Task <MTAErrorModel> DeleteNamespaceAsync(Kubernetes k8sClient)
{
try
{
var namespaceParams = PrepareNamespaceParams(_groupName);
var v1Status = await k8sClient.DeleteNamespaceAsync(namespaceParams);
return(null);
}
catch (HttpOperationException ex)
{
var errorModel = new MTAErrorModel(ex);
return(errorModel);
}
catch (Exception)
{
throw;
}
}
public async Task DeleteNamespaceIfExists()
{
logger.LogInformation("Deleting namespace {0}", ns);
var a1 = await client.ListNamespaceAsync();
bool isFound = false;
foreach (var ns in a1.Items)
{
if (ns.Metadata.Name == this.ns)
{
isFound = true;
break;
}
}
if (!isFound)
{
logger.LogInformation("Namespace {0} does not exist", ns);
return;
}
var deleteOptions = new V1DeleteOptions();
await client.DeleteNamespaceAsync(deleteOptions, ns);
}
public async Task CanDeleteNamespaceAsync()
{
var result = await _client.DeleteNamespaceAsync(_namespace.Metadata.Name, new V1DeleteOptions());
result.HasObject.Should().BeTrue();
}
static async Task Main(string[] args)
{
if (AnsiConsole.Capabilities.SupportLinks)
{
AnsiConsole.MarkupLine(
$"[link=https://github.com/bovrhovn/]Demo for working with Kubernetes[/]!");
}
HorizontalRule("Connecting to cluster using default load via .kube/config and list namespaces");
var config = KubernetesClientConfiguration.BuildConfigFromConfigFile();
IKubernetes client = new Kubernetes(config);
System.Console.WriteLine($"Listening to master at {config.Host}");
var namespaces = await client.ListNamespaceAsync();
foreach (var ns in namespaces.Items)
{
System.Console.WriteLine($"{ns.Metadata.Uid} : {ns.Metadata.Name}");
}
System.Console.Read(); //break for continue
HorizontalRule("List pods in namespace - app");
var listPodInNamespace = await client.ListNamespacedPodAsync("app");
var table = new Table();
table.Border(TableBorder.Rounded);
table.AddColumn("Pod name");
table.AddColumn(new TableColumn("Labels").Centered());
foreach (var currentPod in listPodInNamespace.Items)
{
string labels = string.Empty;
foreach (var labelPair in currentPod.Metadata.Labels)
{
labels += $" {labelPair.Key}:{labelPair.Value} ";
}
table.AddRow(currentPod.Metadata.Name, labels);
}
AnsiConsole.Render(table);
System.Console.Read(); //break for continue
HorizontalRule("Creating namespace and pod");
var namespaceNameForTest = "test";
var newNamespace = new V1Namespace {
Metadata = new V1ObjectMeta {
Name = namespaceNameForTest
}
};
var resultNamespaceCreated = await client.CreateNamespaceAsync(newNamespace);
System.Console.WriteLine(
$"Namespace {resultNamespaceCreated.Metadata.Name} has been created and it is in {resultNamespaceCreated.Status.Phase} state");
var pod = new V1Pod
{
Metadata = new V1ObjectMeta {
Name = "nginx-test"
},
Spec = new V1PodSpec
{
Containers = new List <V1Container>
{
new V1Container
{
Image = "nginx:1.7.9",
Name = "image-nginx-test",
Ports = new List <V1ContainerPort>
{
new V1ContainerPort {
ContainerPort = 80
}
}
}
}
}
};
var createdPodInNamespaceTest = await client.CreateNamespacedPodAsync(pod, namespaceNameForTest);
System.Console.WriteLine($"Pod in namespace {namespaceNameForTest} has been created with state {createdPodInNamespaceTest.Status.Phase}");
System.Console.Read(); //break for continue
HorizontalRule("Exec into pod");
var webSocket =
await client.WebSocketNamespacedPodExecAsync(pod.Metadata.Name,
namespaceNameForTest, "env", pod.Spec.Containers[0].Name);
var demux = new StreamDemuxer(webSocket);
demux.Start();
var buff = new byte[4096];
var stream = demux.GetStream(1, 1);
await stream.ReadAsync(buff, 0, 4096);
var str = System.Text.Encoding.Default.GetString(buff);
System.Console.WriteLine(str); //ouput ls command
System.Console.Read(); //break for continue
HorizontalRule($"Delete namespace {namespaceNameForTest}");
var status = await client.DeleteNamespaceAsync(namespaceNameForTest, new V1DeleteOptions());
System.Console.WriteLine($"Namespace {namespaceNameForTest} has been deleted - status {status.Message} - {status.Status}");
System.Console.Read(); //break for continue
HorizontalRule("Load objects from yaml file");
var typeMap = new Dictionary <string, Type>
{
{ "v1/Pod", typeof(V1Pod) },
{ "v1/Service", typeof(V1Service) },
{ "apps/v1/Deployment", typeof(V1Deployment) }
};
string yamlPath = Path.Join(Path.GetDirectoryName(Assembly.GetEntryAssembly()?.Location), "my.yaml");
var objects = await Yaml.LoadAllFromFileAsync(yamlPath, typeMap);
foreach (var obj in objects)
{
System.Console.WriteLine(obj);
}
System.Console.Read(); //stop and press key to continue
HorizontalRule("Watching pods - watch pods");
var podlistResp = client.ListNamespacedPodWithHttpMessagesAsync("default", watch: true);
using (podlistResp.Watch <V1Pod, V1PodList>((type, item) =>
{
System.Console.WriteLine("==on watch event==");
System.Console.WriteLine(type);
System.Console.WriteLine(item.Metadata.Name);
System.Console.WriteLine("==on watch event==");
}))
{
System.Console.WriteLine("press ctrl + c to stop watching");
var ctrlc = new ManualResetEventSlim(false);
System.Console.CancelKeyPress += (sender, eventArgs) => ctrlc.Set();
ctrlc.Wait();
}
System.Console.Read(); //press any key to continue
}