Docker Command Part-30 By Raj Gupta

To use scale command and create docker container as per our requirement

[root@ip-172-31-93-32 ~]# vi docker-compose.yml
[root@ip-172-31-93-32 ~]# cat docker-compose.yml
version: '3'
services:
  webapp1:
    image: nginx
  webapp2:
    image: nginx
[root@ip-172-31-93-32 ~]# docker-compose up -d
Recreating root_webapp1_1 ... done
Creating root_webapp2_1   ... done
[root@ip-172-31-93-32 ~]# docker-compose ps
     Name              Command          State   Ports
------------------------------------------------------
root_webapp1_1   nginx -g daemon off;   Up      80/tcp
root_webapp2_1   nginx -g daemon off;   Up      80/tcp
[root@ip-172-31-93-32 ~]# docker-compose scale webapp1=4 webapp2=2
WARNING: The scale command is deprecated. Use the up command with the --scale flag instead.
Starting root_webapp1_1 ... done
Creating root_webapp1_2 ... done
Creating root_webapp1_3 ... done
Creating root_webapp1_4 ... done
Starting root_webapp2_1 ... done
Creating root_webapp2_2 ... done

Total 6(4+2) container are created

[root@ip-172-31-93-32 ~]# docker-compose ps
     Name              Command          State   Ports
------------------------------------------------------
root_webapp1_1   nginx -g daemon off;   Up      80/tcp
root_webapp1_2   nginx -g daemon off;   Up      80/tcp
root_webapp1_3   nginx -g daemon off;   Up      80/tcp
root_webapp1_4   nginx -g daemon off;   Up      80/tcp
root_webapp2_1   nginx -g daemon off;   Up      80/tcp
root_webapp2_2   nginx -g daemon off;   Up      80/tcp

Now to delete all

[root@ip-172-31-93-32 ~]# docker-compose down
Stopping root_webapp2_2 ... done
Stopping root_webapp1_2 ... done
Stopping root_webapp1_3 ... done
Stopping root_webapp1_4 ... done
Stopping root_webapp1_1 ... done
Stopping root_webapp2_1 ... done
Removing root_webapp2_2                ... done
Removing root_webapp1_2                ... done
Removing root_webapp1_3                ... done
Removing root_webapp1_4                ... done
Removing root_webapp1_1                ... done
Removing root_webapp2_1                ... done
Removing root_webapp1_run_816095b9c49c ... done
Removing network root_default
[root@ip-172-31-93-32 ~]#

------------------------------------------------------------------------------

Top command:- It will give the all the running process 

[root@ip-172-31-93-32 ~]# docker-compose up -d

Creating network "root_default" with the default driver

Creating root_webapp1_1 ... done

Creating root_webapp2_1 ... done

[root@ip-172-31-93-32 ~]# docker-compose top

root_webapp1_1

UID    PID   PPID    C   STIME   TTY     TIME                        CMD

--------------------------------------------------------------------------------------------

root   332   32749   0   08:57   ?     00:00:00   nginx: master process nginx -g daemon off;

101    471   332     0   08:57   ?     00:00:00   nginx: worker process

root_webapp2_1

UID    PID   PPID   C   STIME   TTY     TIME                        CMD

-------------------------------------------------------------------------------------------

root   380   358    0   08:57   ?     00:00:00   nginx: master process nginx -g daemon off;

101    508   380    0   08:57   ?     00:00:00   nginx: worker process

[root@ip-172-31-93-32 ~]#