Sunday, February 18, 2024

gzip tar extract


import java.nio.file.*; import java.io.*; import org.apache.commons.compress.archivers.tar.*; import org.apache.commons.compress.compressors.gzip.*; public class TarGzExtractor { public static void main(String[] args) throws IOException { Path tarGzFilePath = Paths.get("path/to/your/file.tar.gz"); try (InputStream is = Files.newInputStream(tarGzFilePath); BufferedInputStream bis = new BufferedInputStream(is); GzipCompressorInputStream gzis = new GzipCompressorInputStream(bis); TarArchiveInputStream taris = new TarArchiveInputStream(gzis)) { TarArchiveEntry entry; while ((entry = taris.getNextTarEntry()) != null) { Path destPath = Paths.get("destination/directory", entry.getName()); if (entry.isDirectory()) { Files.createDirectories(destPath); } else { Files.copy(taris, destPath, StandardCopyOption.REPLACE_EXISTING); } } } } }

Wednesday, November 8, 2023

kubernetes config remote cluster

 To create a Kubernetes configuration for a remote cluster, you need to create a kubeconfig file that contains the necessary information about the cluster. The kubeconfig file contains information about the cluster, user, and context that kubectl uses to communicate with the server

1
3
.
Here are the general steps to create a kubeconfig file for a remote Kubernetes cluster:
  1. Retrieve the necessary information about the remote Kubernetes cluster, such as the server address, API port, and authentication credentials.
  2. Use the kubectl config set-clusterkubectl config set-credentials, and kubectl config set-context commands to create a kubeconfig file that contains the necessary information about the cluster. You can use the --server--certificate-authority--client-certificate, and --client-key options to specify the server address, CA certificate, client certificate, and client key, respectively
    1
    3
    .
  3. Use the kubectl config use-context command to set the current context to the context that you want to use to communicate with the remote cluster. The context contains information about the cluster and user that kubectl uses to communicate with the server
    3
    .
Here's an example of how to create a kubeconfig file for a remote Kubernetes cluster:
  1. Retrieve the necessary information about the remote Kubernetes cluster, such as the server address, API port, and authentication credentials.
  2. Use the kubectl config set-cluster command to create a cluster entry in the kubeconfig file:
    bash
    kubectl config set-cluster my-cluster \ --server=https://my-server:6443 \ --certificate-authority=/path/to/ca.crt
    This command creates a cluster entry named my-cluster in the kubeconfig file that specifies the server address and CA certificate.
  3. Use the kubectl config set-credentials command to create a user entry in the kubeconfig file:
    bash
    kubectl config set-credentials my-user \ --client-certificate=/path/to/client.crt \ --client-key=/path/to/client.key
    This command creates a user entry named my-user in the kubeconfig file that specifies the client certificate and key.
  4. Use the kubectl config set-context command to create a context entry in the kubeconfig file:
    bash
    kubectl config set-context my-context \ --cluster=my-cluster \ --user=my-user
    This command creates a context entry named my-context in the kubeconfig file that specifies the cluster and user to use.
  5. Use the kubectl config use-context command to set the current context to my-context:
    bash
    kubectl config use-context my-context
    This command sets the current context to my-context, which specifies the cluster and user to use.
After completing these steps, you can use kubectl to interact with the remote Kubernetes cluster as if it were running on your local machine
1
3
.

Related

what is the process for creating a kubernetes configuration for a remote cluster on orbit
what are the required steps to configure kubectl for remote access to a kubernetes cluster on orbit
how to generate a kubeconfig file for a remote kubernetes cluster on orbit