Docker 4

 Please go through part 6 before reading this article

https://dotnetbyudayrajakonda.blogspot.com/2023/11/ms-azure-part-6.html

We have a other command called as docker info

Explanation

This command will give all the information.

We have a client and server options here. 

By default you can see the client values as shown below

 Context:    default

 Debug Mode: false

Server Values

Containers: How many containers are currently running.

        Running: How many container are in the Running State

        Paused: How many containers are in the paused State

        Stopped: How many containers are in the stopped State

Running instance of an Image is nothing but Container

Only standard which is supported is Image Format

Server Version: It is nothing but the Docker Version(which we can also get from docker -v)

Below is the screen shot

Storage Driver: It will display information about storage driver. The below are the properties of Storage Drivers.

    Backing FileSystem : extfs-->It is basically a Linux file system. As we have installed ubuntu it is nothing but the Linux   

    Support d Type

    Using metacopy: false

    Native Overlay Diff: true

    userxattr: false

Logging Driver: All logs are by default kept in a json format. It also supports other formats as well.

Dockers has few plugins those are 

    Volume: local

    Network: bridge host ipvlan macvlan null overlay

    Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk         syslog

bridge is the default network

host: Client Network,

ipvlan : It is similar to mac address

null: It is stand alone network, No one can use this network.

overlay: When you create cluster based env, in that case we need this.

Logs:

You can create logs in other tools such as splunk, etc

Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog

    fluentd --> It is collect all the logs, and send to the central server.

We have got few inbuilt security options in deckor those are 

           apparmor

           seccomp

           Profile: builtin

We will discuss on all this options, with the examples.

Let now, you might have understand but  the installation and the basics command commands.

As discuss in the previous article, to pull the image with the version , below is the example command

# docker pull ubuntu:18.04

Tag is nothing but the version.

In docker everything will be 12 digit only

To run, you  can use the below command

docker run -d -i -t 

or 

docker run -idt

Note: it can be in any order.

root@ip-172-31-15-245:~# docker run -idt --name test123