AlpineOffline

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Background

I want to run play-with-docker offline, so I have to setup the whole offline environment. In chapter 2 of play-with-docker, it requires building image using alpine, its command apk add nodejs requires internet-connection. In order to let the whole tutorial working offlinely, I have to setup an Alpine offline repository and let it working.

Vagrant Env

The libvirt vagrant box is easy to download and run via following command:

# vagrant init generic/alpine37
# vagrant up --provider=libvirt
# vagrant ssh
# cat /etc/issue
Welcome to Alpine Linux 3.7
Kernel \r on an \m (\l)

Repository Server

This server could reach internet, so it could get packages, and generate the installation repository.

Take nodejs for example, I will create its offline installation reository in this machine:

#  apk add nodejs

This command will download all of the nodejs related package under /var/cache/apk, then we could use these packages for installation:

# apk index -vU --allow-untrusted -o /etc/apk/cache/APKINDEX.tar.gz /etc/apk/cache/*.apk

Using following scripts for generating symbolic cheating apks for installation:

#!/bin/bash
for f in $( cd /etc/apk/cache && ls *.apk ); do g=$(echo ${f:0:-13}.apk); cd /etc/apk/cache; ln -s $f $g; done

Your directory /etc/apk/cache will like following:

# ls -l -h | more
total 98612
-rw-r--r--    1 root     root       14.4K Apr  6 08:31 APKINDEX.tar.gz
lrwxrwxrwx    1 root     root          28 Apr  6 08:32 abuild-3.1.0-r3.apk -> abuild-3.1.0-r3.e1614238.apk
-rw-r--r--    1 root     root       71.5K Apr  6 05:57 abuild-3.1.0-r3.e1614238.apk
lrwxrwxrwx    1 root     root          26 Apr  6 08:32 acct-6.6.4-r0.apk -> acct-6.6.4-r0.f2caf476.apk
-rw-r--r--    1 root     root       57.7K Mar 22 17:31 acct-6.6.4-r0.f2caf476.apk
-rw-r--r--    1 root     root        1.6K Mar 22 17:31 alpine-base-3.7.0-r0.6e79e3bb.apk
lrwxrwxrwx    1 root     root          33 Apr  6 08:32 alpine-base-3.7.0-r0.apk -> alpine-base-3.7.0-r0.6e79e3bb.apk

Using following commands for uploading repository to http server:

scp -r /var/cache/apk/ xxx@192.168.122.1:/var/download/myapk/

In server 192.168.122.1’s folder /var/download/myapk, do following operation:

# ln -s x86_64 noarch

Client

In client, do following setting:

# vim  /etc/apk/repositories 
    #https://dl-3.alpinelinux.org/alpine/v3.7/main
    #https://mirror.leaseweb.com/alpine/v3.7/main
    http://192.168.122.1/myapk

Update the repository via following command:

# apk update --allow-untrusted
fetch http://192.168.122.1/myapk/x86_64/APKINDEX.tar.gz
OK: 110 distinct packages available

Install nodejs via following commands:

# apk add nodejs --allow-untrusted
(1/8) Installing nodejs-npm (8.9.3-r1)
(2/8) Installing c-ares (1.13.0-r0)
(3/8) Installing libcrypto1.0 (1.0.2o-r0)
(4/8) Installing http-parser (2.7.1-r1)
(5/8) Installing libssl1.0 (1.0.2o-r0)
(6/8) Installing libstdc++ (6.4.0-r5)
(7/8) Installing libuv (1.17.0-r0)
(8/8) Installing nodejs (8.9.3-r1)
Executing busybox-1.27.2-r8.trigger
OK: 228 MiB in 82 packages

TBD

You could add trusted signature to repository, but this will let you get the signature firstly.