Day-1: Q1.Explain what is docker container with images?
Docker image:
Docker image is a collection of file system (Root FS, User FS and App FS).
Use “docker images” command to see the docker images
root@ip-172-31-28-155:/home/ubuntu# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
bash latest 8856ae160078 2 days ago 12.9MB
alpine latest 14119a10abf4 2 days ago 5.6MB
python latest 1e76b28bfd4e 12 days ago 911MB
nginx latest dd34e67e3371 12 days ago 133MB
httpd latest c8ca530172a8 12 days ago 138MB
ubuntu latest 1318b700e415 4 weeks ago 72.8MB
fedora latest dce66322d647 5 weeks ago 178MB
Docker Container:
Docker container is the runnable instance of docker image.
Docker container contains 1 ROOT FS, 1 PID, 1 NET and 1 USER and attach ROOT FS, PID and NET to user.
One copy of docker image get attached to each container
Use “docker ps” command to see all docker containers with status “UP”
Use “docker ps – a” command to see all docker containers with all status including “UP/ Exited /Created”
root@ip-172-31-28-155:/home/ubuntu# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
377816ab4f23 httpd "httpd-foreground" 3 minutes ago Up About a minute 80/tcp mani
ca9d52449136 nginx "/docker-entrypoint.…" 10 minutes ago Up 10 minutes 80/tcp tender_lewin
bdc16464a31f nginx "/docker-entrypoint.…" 20 minutes ago Up 20 minutes (Paused) 80/tcp akilan
b1f8b2f42f2b httpd "httpd-foreground" 22 minutes ago Up 20 minutes 80/tcp soumya2
16a185dabdf9 httpd "httpd-foreground" 27 minutes ago Up 19 minutes 80/tcp sunil_httpd
6a0a25cd90ab httpd "httpd-foreground" 30 minutes ago Up About a minute 80/tcp Aji_httpd
2a042b66db52 httpd "httpd-foreground" 31 minutes ago Up 22 minutes 80/tcp akhil
c5a741893181 httpd "httpd-foreground" 32 minutes ago Up 20 minutes 80/tcp anoop2
fc660bad9f21 httpd "httpd-foreground" 32 minutes ago Up 19 minutes 80/tcp anoop1
2344c2aeb233 httpd "httpd-foreground" 33 minutes ago Up 20 minutes 80/tcp soumya
2440b6313daf httpd "httpd-foreground" 34 minutes ago Up 34 minutes 80/tcp sabeesh
275c494c90da httpd "httpd-foreground" 34 minutes ago Up 8 minutes 80/tcp bitto
2d0eb09c5f08 httpd "httpd-foreground" 34 minutes ago Up 7 minutes 80/tcp abhi
835d1360683d httpd "httpd-foreground" 35 minutes ago Up 29 minutes 80/tcp sree
be4ecabd1a51 httpd "httpd-foreground" 36 minutes ago Up 29 minutes 80/tcp aswathi
67cc6c2d35b3 httpd "httpd-foreground" 38 minutes ago Up 33 minutes (Paused) 80/tcp test1
ad62efdc813f httpd "httpd-foreground" 39 minutes ago Up 34 minutes 80/tcp kannan
ccb658e63dbb httpd "httpd-foreground" 41 minutes ago Up 37 minutes 80/tcp jenish1
30daf8cff021 ubuntu "bash" About an hour ago Up About an hour pensive_driscoll
797e8c71bba0 httpd "httpd-foreground" About an hour ago Up About an hour 80/tcp raj1
root@ip-172-31-28-155:/home/ubuntu#
root@ip-172-31-28-155:/home/ubuntu#
root@ip-172-31-28-155:/home/ubuntu# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
377816ab4f23 httpd "httpd-foreground" 3 minutes ago Up 2 minutes 80/tcp mani
ca9d52449136 nginx "/docker-entrypoint.…" 10 minutes ago Up 10 minutes 80/tcp tender_lewin
14cd4df861c1 httpd "httpd-foreground" 18 minutes ago Exited (0) 16 minutes ago jaison
0ace859e4691 httpd "httpd-foreground" 18 minutes ago Created wtest2
890b20cc793d httpd "httpd-foreground" 19 minutes ago Exited (137) 19 minutes ago SujithSunny
bdc16464a31f nginx "/docker-entrypoint.…" 20 minutes ago Up 20 minutes (Paused) 80/tcp akilan
4cb85adb7671 nginx "/docker-entrypoint.…" 21 minutes ago Exited (0) 20 minutes ago akilan2
5d73fddb1f99 httpd "httpd-foreground" 21 minutes ago Exited (137) 14 minutes ago jenish2
b8612f701078 httpd "httpd-foreground" 22 minutes ago Created affectionate_almeida
b1f8b2f42f2b httpd "httpd-foreground" 22 minutes ago Up 21 minutes 80/tcp soumya2
16a185dabdf9 httpd "httpd-foreground" 27 minutes ago Up 19 minutes 80/tcp sunil_httpd
ace65c455fea httpd "httpd-foreground" 27 minutes ago Exited (137) 23 minutes ago alshameer1
1014971b2468 httpd "httpd-foreground" 29 minutes ago Exited (0) 19 minutes ago alshameer
f2ae9017d782 python "python3" 29 minutes ago Exited (0) 28 minutes ago sunil
6a0a25cd90ab httpd "httpd-foreground" 30 minutes ago Up About a minute 80/tcp Aji_httpd
13fbd5fad3f3 httpd "httpd-foreground" 30 minutes ago Created nifty_hellman
2a042b66db52 httpd "httpd-foreground" 31 minutes ago Up 22 minutes 80/tcp akhil
c5a741893181 httpd "httpd-foreground" 32 minutes ago Up 20 minutes 80/tcp anoop2
05d0bb37cd21 httpd "httpd-foreground" 32 minutes ago Exited (0) 23 minutes ago srm
fc660bad9f21 httpd "httpd-foreground" 32 minutes ago Up 20 minutes 80/tcp anoop1
e06e80789c87 httpd "--name aji_httpd" 33 minutes ago Created 80/tcp gifted_shannon
2344c2aeb233 httpd "httpd-foreground" 33 minutes ago Up 20 minutes 80/tcp soumya
bdf58568dbe6 httpd "httpd-foreground" 34 minutes ago Exited (137) 19 minutes ago vin6
548886386f8b httpd "httpd-foreground" 34 minutes ago Exited (137) 2 minutes ago rajuc
a0244d0286c2 httpd "sujith" 34 minutes ago Created 80/tcp agitated_joliot
2440b6313daf httpd "httpd-foreground" 34 minutes ago Up 34 minutes 80/tcp sabeesh
275c494c90da httpd "httpd-foreground" 34 minutes ago Up 8 minutes 80/tcp bitto
3b7a3ce91c5f httpd "httpd-foreground" 34 minutes ago Created upbeat_kirch
c773bc041cf5 httpd "httpd-foreground" 34 minutes ago Exited (0) 33 minutes ago xenodochial_jones
2d0eb09c5f08 httpd "httpd-foreground" 35 minutes ago Up 7 minutes 80/tcp abhi
433f2a1e6e72 httpd "httpd-foreground" 35 minutes ago Created nostalgic_bohr
28525b0ff5df httpd "httpd-foreground" 35 minutes ago Exited (0) 10 minutes ago abhin
e856e5b78cea httpd "httpd-foreground" 35 minutes ago Exited (137) 6 minutes ago sooraj
835d1360683d httpd "httpd-foreground" 35 minutes ago Up 29 minutes 80/tcp sree
be4ecabd1a51 httpd "httpd-foreground" 36 minutes ago Up 29 minutes 80/tcp aswathi
fb86828043cd ubuntu "bash" 36 minutes ago Exited (0) 36 minutes ago vin3
e579aaf35c25 nginx:latest "/docker-entrypoint.…" 37 minutes ago Exited (137) 37 minutes ago gracious_montalcini
3048c78a152c alpine "/bin/sh" 38 minutes ago Exited (0) 38 minutes ago vin2
67cc6c2d35b3 httpd "httpd-foreground" 38 minutes ago Up 33 minutes (Paused) 80/tcp test1
8ec8b56eb496 nginx:latest "/docker-entrypoint.…" 39 minutes ago Exited (0) 38 minutes ago naughty_leavitt
ad62efdc813f httpd "httpd-foreground" 39 minutes ago Up 35 minutes 80/tcp kannan
6f44c9a89d38 nginx:latest "/docker-entrypoint.…" 39 minutes ago Exited (0) 39 minutes ago suspicious_shannon
69659e68945b fedora "/bin/bash" 39 minutes ago Exited (0) 38 minutes ago vin1
ccb658e63dbb httpd "httpd-foreground" 41 minutes ago Up 37 minutes 80/tcp jenish1
30daf8cff021 ubuntu "bash" About an hour ago Up About an hour pensive_driscoll
e661437407b7 httpd "httpd-foreground" About an hour ago Created raj2
797e8c71bba0 httpd "httpd-foreground" About an hour ago Up About an hour 80/tcp raj1