DOCKER COMMANDS HANDS-ON

 

 Each lab scenario gives you the opportunity to familiarize with the set up.  You will be expected to perform tasks like run a container, build, delete and stop. 

STEP 1: 

Docker  Version : To check the version of Docker Server Engine running on the host.

The output will show you both the client and server version of Docker engine installed on your system. 

$ docker version

Client: Docker Engine - Community

Version: 19.03.15

API version: 1.40

Go version: go1.13.15

Git commit: 99e3ed8919

Built: Sat Jan 30 03:17:11 2021

OS/Arch: linux/amd64

Experimental: false

Server: Docker Engine - Community

Engine:

Version: 19.03.15

API version: 1.40 (minimum version 1.12)

Go version: go1.13.15

Git commit: 99e3ed8919

Built: Sat Jan 30 03:15:40 2021

OS/Arch: linux/amd64

Experimental: false

containerd:

Version: 1.4.3

GitCommit: 269548fa27e0089a8b8278fc4fc781d7f65a939b

runc:

Version: 1.0.0-rc92

GitCommit: ff819c7e9184c13b7c2607fe6c30ae19403a7aff

docker-init:

Version: 0.18.0

GitCommit: fec3683

$

STEP 2:

How many images are available ? You run the command docker images

$ docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

mysql latest 4f06b49211c0 5 weeks ago 530MB

nginx alpine 2bc7edbc3cf2 7 weeks ago 40.7MB

postgres latest 680aba37fd0f 7 weeks ago 379MB

alpine latest b2aa39c304c2 7 weeks ago 7.05MB

redis latest 2f66aad5324a 7 weeks ago 117MB

nginx latest 3f8a00f137a0 7 weeks ago 142MB

ubuntu latest 58db3edaf2be 2 months ago 77.8MB

STEP 3:

You can run a container using the redis image. 

$ docker run -t redis

1:C 05 Apr 2023 16:10:51.377 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo

1:C 05 Apr 2023 16:10:51.377 # Redis version=7.0.8, bits=64, commit=00000000, modified=0, pid=1, just started

1:C 05 Apr 2023 16:10:51.377 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf

1:M 05 Apr 2023 16:10:51.378 * monotonic clock: POSIX clock_gettime

_._

_.-``__ ''-._

_.-`` `. `_. ''-._ Redis 7.0.8 (00000000/0) 64 bit

.-`` .-```. ```\/ _.,_ ''-._

( ' , .-` | `, ) Running in standalone mode

|`-._`-...-` __...-.``-._|'` _.-'| Port: 6379

| `-._ `._ / _.-' | PID: 1

`-._ `-._ `-./ _.-' _.-'

|`-._`-._ `-.__.-' _.-'_.-'|

| `-._`-._ _.-'_.-' | https://redis.io

`-._ `-._`-.__.-'_.-' _.-'

|`-._`-._ `-.__.-' _.-'_.-'|

| `-._`-._ _.-'_.-' |

`-._ `-._`-.__.-'_.-' _.-'

`-._ `-.__.-' _.-'

`-._ _.-'

`-.__.-'

STEP 4:

docker run redis 

$ docker run redis

1:C 05 Apr 2023 16:55:43.279 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo

1:C 05 Apr 2023 16:55:43.279 # Redis version=7.0.8, bits=64, commit=00000000, modified=0, pid=1, just started

1:C 05 Apr 2023 16:55:43.279 # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /pa

STEP 5:

Can you stop the running container you just created. 

$ docker stop 8413d7fdbfdb

8413d7fdbfdb

$ docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

8413d7fdbfdb redis "docker-entrypoint.s…" 5 minutes ago Exited (0) 10 seconds ago jolly_nightingale

STEP 6:

To check the running container. 

$ docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

$

STEP 7:

How many containers are present on the host including both running and not running ones.

$ docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

8413d7fdbfdb redis "docker-entrypoint.s…" 5 minutes ago Exited (0) 10 seconds ago jolly_nightingale

$ docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

8413d7fdbfdb redis "docker-entrypoint.s…" 8 minutes ago Exited (0) 3 minutes ago jolly_nightingale

$ docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

$ docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

37bf0d26e4c1 alpine "/bin/sh" About a minute ago Exited (0) About a minute ago charming_cori

cd25b2b81889 alpine "sleep 1000" About a minute ago Up About a minute pedantic_kapitsa

f30f483b1c0a nginx:alpine "/docker-entrypoint.…" About a minute ago Up About a minute 80/tcp nginx-2

d74280453797 nginx:alpine "/docker-entrypoint.…" About a minute ago Up About a minute 80/tcp nginx-1

c841b3e99c4a ubuntu "sleep 1000" About a minute ago Up About a minute awesome_northcut

8413d7fdbfdb redis "docker-entrypoint.s…" 11 minutes ago Exited (0) 5 minutes ago jolly_nightingale

$

STEP 8:

To stop the container you just created.

$ docker stop 2f791

2f791

$ docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

2f791c2115ff redis "docker-entrypoint.s…" 7 minutes ago Exited (0) 6 minutes ago competent_cartwright

$

STEP 9:

To stop containers run the command "docker stop (container id) (container name) and then to delete them run docker rm (container id)

$ docker stop 86eff91657af crazy_meitner

86eff91657af

crazy_meitner

$ docker rm 86eff91657af

86eff91657af

$ docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

ef7675b669eb nginx:alpine "/docker-entrypoint.…" 10 minutes ago Up 10 minutes 80/tcp nginx-2

998bd5125c4d nginx:alpine "/docker-entrypoint.…" 10 minutes ago Up 10 minutes 80/tcp nginx-1

5792f6aaa0b0 ubuntu "sleep 1000" 11 minutes ago Up 10 minutes awesome_northcut

2a0ee489807d redis "docker-entrypoint.s…" 12 minutes ago Exited (0) 11 minutes ago ecstatic_darwin

2f791c2115ff redis "docker-entrypoint.s…" 24 minutes ago Exited (0) 23 minutes ago competent_cartwright

$ docker stop ef7675b669eb nginx-2

ef7675b669eb

nginx-2

$ docker rm ef7675b669eb

ef7675b669eb

$ docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

998bd5125c4d nginx:alpine "/docker-entrypoint.…" 12 minutes ago Up 12 minutes 80/tcp nginx-1

5792f6aaa0b0 ubuntu "sleep 1000" 12 minutes ago Up 12 minutes awesome_northcut

2a0ee489807d redis "docker-entrypoint.s…" 14 minutes ago Exited (0) 13 minutes ago ecstatic_darwin

2f791c2115ff redis "docker-entrypoint.s…" 26 minutes ago Exited (0) 25 minutes ago competent_cartwright

$

STEP 10:

To delete an ubutu image. The command is "docker rmi ubuntu"

$ docker rmi ubuntu

Untagged: ubuntu:latest

Untagged: ubuntu@sha256:9a0bdde4188b896a372804be2384015e90e3f84906b750c1a53539b585fbbe7f

STEP 11:

To pull an image. 

$ docker pull nginx:1.14-alpine

1.14-alpine: Pulling from library/nginx

bdf0201b3a05: Pull complete

3d0a573c81ed: Pull complete

8129faeb2eb6: Pull complete

3dc99f571daf: Pull complete

Digest: sha256:485b610fefec7ff6c463ced9623314a04ed67e3945b9c08d7e53a47f6d108dc7

Status: Downloaded newer image for nginx:1.14-alpine

docker.io/library/nginx:1.14-alpine

$

STEP 12:

You can run a container with the nginx:1.14-alpine image and name it webapp .

$ docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

$ docker run -d --name webapp nginx:1.14-alpine

3b1729e87ea63258d4a99d95ee7481f35fccdd83a95f8fa7ec3dc8d131879d80

$ docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

3b1729e87ea6 nginx:1.14-alpine "nginx -g 'daemon of…" 9 seconds ago Up 7 seconds 80/tcp webapp

$

Referencing : https://hub.docker.com/

Kode kloud

Next slide we will discuss on docker run . Happy Learning !!! 😊