Attachment 9442 Details for Bug 20100 – First part of learning curve

First part of learning curve

docker_1.txt (text/plain), 2.42 KB, created by Len Lawrence on 2017-06-23 00:06:40 CEST

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Creator: Len Lawrence

Created: 2017-06-23 00:06:40 CEST

Size: 2.42 KB

patch

obsolete

>Before updating, docker was installed on x86_64 and a tutorial from O'Reilly, "Using Docker" by Adrian Mouat was used for familiarization.  These are some of the commands:
>
>$ sudo systemctl enable docker
>$ sudo systemctl start docker
>$ systemctl status docker
>â docker.service - Docker Application Container Engine
>   Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled)
>   Active: active (running) since Thu 2017-06-22 22:10:17 BST; 34min ago
>     Docs: http://docs.docker.com
> Main PID: 22127 (docker)
>   CGroup: /system.slice/docker.service
>           ââ22127 /usr/bin/docker -d
>
># Give user privileged access to docker by adding her to the docker group.
>$ sudo usermod -aG docker <user>
># Remember to logout and login.
>$ sudo systemctl restart docker
>
>$ docker version
>Client:
> Version:      1.9.1
> API version:  1.21
> Go version:   go1.6.2
> Git commit:   a34a1d5
> Built:        
> OS/Arch:      linux/amd64
>
>Server:
> Version:      1.9.1
> API version:  1.21
> Go version:   go1.6.2
> Git commit:   a34a1d5
> Built:        
> OS/Arch:      linux/amd64
>
># Run a container downloaded from a repository online.
>$ docker run debian echo "Hello World"
>Unable to find image 'debian:latest' locally
>latest: Pulling from library/debian
>
>13665ace9c20: Pull complete 
>b7b564987286: Pull complete 
>Digest: sha256:32bde5f28ba92a68ab7b56cb4185e057c5fda000ab1493e6f26f8e0c741f91f9
>Status: Downloaded newer image for debian:latest
>Hello World
>
># The debian container is now available locally:
>$ docker run debian echo "Hello World"
>Hello World
>
># Establish a shell in the container:
>$ docker run -i -t debian /bin/bash
>root@a38e388f2be3:/# echo "Hello from in here!"
>Hello from in here!
>root@a38e388f2be3:/# exit
>exit
>
># Rename the container:
>$ docker run -h Debby -i -t debian /bin/bash
>
># Attempt to break the container...
>root@Debby:/# mv /bin /basket
>root@Debby:/# ls
>basket	dev  home  lib32  libx32  mnt  proc  run   srv	tmp  var
>boot	etc  lib   lib64  media   opt  root  sbin  sys	usr
># Not what was expected.  According to the O'Reilly book the command should have failed, like so:
>bash: ls: command not found
># The book was written against version 1.8 whereas we are running 1.9.  Perhaps the commands are cached somewhere now.
>At this point in the tutorial things diverge markedly.  The book says that it is important to install the latest version because the pace of development is so fast; it looks like that applies to the documentation also.
>
>Pausing to regroup.
>
> 
>
>
>

Before updating, docker was installed on x86_64 and a tutorial from O'Reilly, "Using Docker" by Adrian Mouat was used for familiarization.  These are some of the commands:

$ sudo systemctl enable docker
$ sudo systemctl start docker
$ systemctl status docker
â docker.service - Docker Application Container Engine
   Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled)
   Active: active (running) since Thu 2017-06-22 22:10:17 BST; 34min ago
     Docs: http://docs.docker.com
 Main PID: 22127 (docker)
   CGroup: /system.slice/docker.service
           ââ22127 /usr/bin/docker -d

# Give user privileged access to docker by adding her to the docker group.
$ sudo usermod -aG docker <user>
# Remember to logout and login.
$ sudo systemctl restart docker

$ docker version
Client:
 Version:      1.9.1
 API version:  1.21
 Go version:   go1.6.2
 Git commit:   a34a1d5
 Built:        
 OS/Arch:      linux/amd64

Server:
 Version:      1.9.1
 API version:  1.21
 Go version:   go1.6.2
 Git commit:   a34a1d5
 Built:        
 OS/Arch:      linux/amd64

# Run a container downloaded from a repository online.
$ docker run debian echo "Hello World"
Unable to find image 'debian:latest' locally
latest: Pulling from library/debian

13665ace9c20: Pull complete 
b7b564987286: Pull complete 
Digest: sha256:32bde5f28ba92a68ab7b56cb4185e057c5fda000ab1493e6f26f8e0c741f91f9
Status: Downloaded newer image for debian:latest
Hello World

# The debian container is now available locally:
$ docker run debian echo "Hello World"
Hello World

# Establish a shell in the container:
$ docker run -i -t debian /bin/bash
root@a38e388f2be3:/# echo "Hello from in here!"
Hello from in here!
root@a38e388f2be3:/# exit
exit

# Rename the container:
$ docker run -h Debby -i -t debian /bin/bash

# Attempt to break the container...
root@Debby:/# mv /bin /basket
root@Debby:/# ls
basket	dev  home  lib32  libx32  mnt  proc  run   srv	tmp  var
boot	etc  lib   lib64  media   opt  root  sbin  sys	usr
# Not what was expected.  According to the O'Reilly book the command should have failed, like so:
bash: ls: command not found
# The book was written against version 1.8 whereas we are running 1.9.  Perhaps the commands are cached somewhere now.
At this point in the tutorial things diverge markedly.  The book says that it is important to install the latest version because the pace of development is so fast; it looks like that applies to the documentation also.

Pausing to regroup.

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Attachments on bug 20100: 9442 | 9443 | 9444