Shulou(Shulou.com)06/01 Report--

This article is about how to use the K8S technology stack for basic mirror production and experiments. The editor thinks it is very practical, so I share it with you. I hope you can get something after reading this article. Let's take a look at it with the editor.

To put it bluntly, the host function provided by any CVM manufacturer to users is a running instance of the basic image of the operating system. Therefore, this blog post will explain how to build a local centos base package image with ssh components and upload it to docker hub for download.

Docker hub registration

Registration address: https://hub.docker.com/

Log in to docker hub from the command line

Enter: docker login on the command line

Make a centos7.4 image

# * 1. Step 1: * * pull the latest basic centos image from the remote end and create it based on this image.

Docker pull centos

# * * 2. Step 2: * * start the docker container

Docker run-it centos:latest / bin/bash

# * * 3. Step 3: * * install sshd in the launched container

Yum-y install openssh-serveryum-y install openssh-clients

# * 4. Step 4: * * Let's try to start the sshd service and we will find an error

Start the sshd service command: / usr/sbin/sshd-D reports the following error:

Could not load host key: / etc/ssh/ssh_host_rsa_keyCould not load host key: / etc/ssh/ssh_host_ecdsa_keyCould not load host key: / etc/ssh/ssh_host_ed25519_key

Let's solve the above mistakes:

Ssh-keygen-t rsa-f / etc/ssh/ssh_host_rsa_key-N "" ssh-keygen-t ecdsa-f / etc/ssh/ssh_host_ecdsa_key-N "" ssh-keygen-t ed25519-f / etc/ssh/ssh_host_ed25519_key-N ""

Starting the sshd service again at this point should be error-free.

# * * 5. Step 5: * * Edit sshd_config configuration file

Execute the command: vim / etc/ssh/sshd_config changes the original UsePAM yes in the configuration file to UsePAM no

# * * 6. Step 6: * * change the password of root

Execute the command: passwd root can enter the password twice

# * * 7. Step 7: * * We use the exit command to exit the container

# * * 8. Step 8: * * based on the container you just exited, let's create a centos image docker commit bf5b84f8e2d8 docker.io/hansonwang/centos7.4_ssh with ssh function.

(1) Note that the bf5b84f8e2d8 here is the id of the container you just ran, which can be viewed with docker ps-a. (2) Note the commit format here, which must be docker.io//centos7.4_ssh.

Push mirroring to the remote end

Docker push docker.io/hansonwang/centos7.4_ssh:latest

Also note that the push format here must be docker.io/

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