Skip to main content

Podman : Install

 Install Podman that is Container management tool.

It's possible to use the same ease of use of Docker Cli and also Podman does not need specific Service Daemon.

[1]. Install Podman.

[root@dlp ~]# dnf -y install podman

[2]. Download an official image and create a Container and output the words [Welcome to the Podman World] inside the Container.

# download official image

[root@dlp ~]# podman pull centos

Trying to pull docker.io/centos:latest...Getting image source signatures

Copying blob 729ec3a6ada3: 68.21 MiB / 68.21 MiB  4s

Copying config 0f3e07c0138f: 2.13 KiB / 2.13 KiB  0s

Writing manifest to image destination

Storing signatures

0f3e07c0138fbe05abcb7a9cc7d63d9bd4c980c3f61fea5efa32e7c4217ef4da


# run echo inside Container

[root@dlp ~]# podman run centos /bin/echo "Welcome to the Podman World"

Welcome to the Podman World

[3]. Connect to the interactive session of a Container with [i] and [t] option like follows. If [exit] from the Container session, the process of a Container finishes.

[root@dlp ~]# podman run -it centos /bin/bash

[root@1062d638cd7a /]#     # connected

[root@1062d638cd7a /]# uname -a

Linux 1062d638cd7a 4.18.0-80.7.1.el8_0.x86_64 #1 SMP Sat Aug 3 15:14:00 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

[root@1062d638cd7a /]# exit

exit

[root@dlp ~]#     # come back

[4]. If you'd like to run a Container as a Daemon, add [d] option.

[root@dlp ~]# podman run -itd centos /bin/bash

81d101111d73e4b35dbd6b9a30aa75be8b9a43895430d569f9625ca6764289e5


# show podman proceses

[root@dlp ~]# podman ps

CONTAINER ID  IMAGE                            COMMAND    CREATED        STATUS            PORTS  NAMES

81d101111d73  docker.io/library/centos:latest  /bin/bash  3 seconds ago  Up 3 seconds ago         suspicious_lalande


# attach to container session

[root@dlp ~]# podman exec -it 81d101111d73 /bin/bash

[root@81d101111d73 /]#     # connected

[root@81d101111d73 /]# exit

# stop container process (if force stop, specify [kill])

[root@dlp ~]# podman stop 81d101111d73

[root@dlp ~]# podman ps

CONTAINER ID  IMAGE  COMMAND  CREATED  STATUS  PORTS  NAMES

Comments

Popular posts from this blog

C++ How to use Date and Time

The C++ standard library does not provide a proper date type. C++ inherits the structs and functions for date and time manipulation from C. To access date and time related functions and structures, you would need to include <ctime> header file in your C++ program. There are four time-related types: clock_t, time_t, size_t , and tm . The types clock_t, size_t and time_t are capable of representing the system time and date as some sort of integer. The structure type tm holds the date and time in the form of a C structure having the following elements: struct tm { int tm_sec ; // seconds of minutes from 0 to 61 int tm_min ; // minutes of hour from 0 to 59 int tm_hour ; // hours of day from 0 to 24 int tm_mday ; // day of month from 1 to 31 int tm_mon ; // month of year from 0 to 11 int tm_year ; // year since 1900 int tm_wday ; // days since sunday int tm_yday ; // days since January 1st int tm_isdst ; // hours of daylight savin...

PERL Some good framework

1. Catalyst is the most popular agile Perl MVC web framework that encourages rapid development and clean design without getting in your way. Catalyst | Perl MVC web application framework 2. Mojolicious is a next generation web framework for the Perl programming language. Back in the early days of the web, many people learned Perl because of a wonderful Perl   ... Mojolicious - Perl real-time web framework 3. Documents for Perl  The Perl Archive Network, the gateway to all things Perl. The canonical location for Perl code and modules. The Comprehensive Perl Archive Network - www. cpan .org

PHP Error and Exception Handling

Error handling is the process of catching errors raised by your program and then taking appropriate action. If you would handle errors properly then it may lead to many unforeseen consequences. Its very simple in PHP to handle an errors. Using die() function: While wirting your PHP program you should check all possible error condition before going ahead and take appropriate action when required. Try following example without having /tmp/test.xt file and with this file. <?php if(!file_exists("/tmp/test.txt")) { die("File not found"); } else { $file=fopen("/tmp/test.txt","r"); print "Opend file sucessfully"; } // Test of the code here. ?> This way you can write an efficient code. Using abive technique you can stop your program whenever it errors out and display more meaningful and user friendly meassage. Defining Custom Error Handling Function: You can write your own function to handling any error. PHP provides y...