Skip to main content

Docker

Question:  Why introduce docker in the IT industry ?

Ans: Docker provide the environment  for run or  perform the task according to your command and do not take extra resources from your computer system. it is write in go language, do not need to install os and do not need to run virtual.

The software are use to launch that technology that is called LXC (Linux Container)

LXC : It is the process to perform for the specific task like os building, start process, app/cmd/process run.
 it is also create the environment for run the task like jvm in java programming .
this the create the container of each and every process or task and that container have life time is to complete the process.
 Tool for the LXC :
 1- buildah
2- containerd
3-docker
4- podman
 
We are use the Docker technology :

1- Installation of docker 

  # yum install docker 
  # systemctl restart docker 
 #  systemctl enable docker 

 2- Install docker image 
 we have two method for installation of docker image
1-  graphically go to https://hub.docker.com/  and type image you want to download and run
2-  To  run the command and download the image

# docker search image_name
 search the image what you want to download

# docker pull image_name  
 download the docker image
# docker images
to show the all image which is download

#docker run image_name:tag task_name
                 or
#docker run ID task_name
run the task which you want to perform
#docker ps -a 
show all the history of docker command
#docker run -it (image_name OR ID) task_name
to select your task from history and run again and same task
#docker start ID
to start the again the task which you want to perform
#docker exec -it image_name task_name 
to select your task from history and run again and same task but the difference between run and exec , in the run your container life is process time but the exec container time is unlimited that means the container not close after close the process

 

 

Comments

Post a Comment

thank you for visiting :)

Popular posts from this blog

The Seven-Step Model of Migration

Irrespective of the migration approach adopted, the Seven-step Model of Cloud Migration creates a more rational point of view towards the migration process and offers the ability to imbibe several best practices throughout the journey Step 1: Assess Cloud migration assessments are conducted to understand the complexities in the migration process at the code, design and architectural levels. The investment and the recurring costs are also evaluated along with gauging the tools, test cases, functionalities and other features related to the configuration. Step 2: Isolate The applications to be migrated to the cloud from the internal data center are freed of dependencies pertaining to the environment and the existing system. This step cuts a clearer picture about the complexity of the migration process. Step 3: Map Most organisations hold a detailed mapping of their environment with all the systems and applications. This information can be used to distinguish between the ...
Post a Comment
Read more

Special Permissions in linux

The setuid permission on an executable file means that the command will run as the user owning the file, not as the user that ran the command. One example is the passwd command: [student@desktopX ~]$ ls -l /usr/bin/passwd -rw s r-xr-x. 1 root root 35504 Jul 16 2010 /usr/bin/passwd In a long listing, you can spot the setuid permissions by a lowercase s where you would normally expect the x (owner execute permissions) to be. If the owner does not have execute permissions, this will be replaced by an uppercase S . The special permission setgid on a directory means that files created in the directory will inherit their group ownership from the directory, rather than inheriting it from the creating user. This is commonly used on group collaborative directories to automatically change a file from the default private group to the shared group, or if files in a directory should be...
Post a Comment
Read more

RequestsDependencyWarning: urllib3 (1.24.1) or chardet (3.0.4) doesn't match a supported version

import tweepy /usr/lib/python2.7/dist-packages/requests/__init__.py:80: RequestsDependencyWarning: urllib3 (1.24.1) or chardet (3.0.4) doesn't match a supported version!   RequestsDependencyWarning) Traceback (most recent call last):   File "<stdin>", line 1, in <module>   File "/usr/local/lib/python2.7/dist-packages/tweepy/__init__.py", line 14, in <module>     from tweepy.api import API   File "/usr/local/lib/python2.7/dist-packages/tweepy/api.py", line 12, in <module>     from tweepy.binder import bind_api   File "/usr/local/lib/python2.7/dist-packages/tweepy/binder.py", line 11, in <module>     import requests   File "/usr/lib/python2.7/dist-packages/requests/__init__.py", line 97, in <module>     from . import utils   File "/usr/lib/python2.7/dist-packages/requests/utils.py", line 26, in <module>     from ._internal_utils import to...
Post a Comment
Read more

tag