Difference between revisions of "Setting up the build environment in a chroot"

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= Introduction =
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#REDIRECT [[Alpine Linux in a chroot]]
The Build Environment will be called [[#Create a build environment|BE]] from now on.<BR>
 
You will need a few Gigabytes to have enough pace for kernel compiling and storing all the binary packages and iso image.
 
 
 
= Create a build environment =
 
We are setting up our [[#Create a build environment|BE]] in chroot.<BR>
 
 
 
'''Note:''' The variables below:
 
* '''${mirror}''' = Should be replaced with one of the available alpine-mirrors.
 
** Available mirrors:
 
{{Mirrors}}
 
* '''${build_dir}''' = You can name it whatever you like.
 
 
 
Lets start by geting the latest apk static binary:
 
wget ${mirror}/apk.static
 
chmod +x ./apk.static
 
 
 
We are setting up a basic chroot:
 
mkdir ${build_dir}
 
./apk.static --repo ${mirror}/packages/core --root $PWD/${build_dir} add --initdb build-base git abuildv
 
mkdir -p ./${build_dir}/proc
 
mount --bind /proc ./${build_dir}/proc
 
 
 
Lets setup our needed devices:
 
mknod -m 666 ./${build_dir}/dev/full c 1 7
 
mknod -m 777 ./${build_dir}/dev/null c 1 3
 
mknod -m 666 ./${build_dir}/dev/ptmx c 5 2
 
mknod -m 644 ./${build_dir}/dev/random c 1 8
 
mknod -m 644 ./${build_dir}/dev/urandom c 1 9
 
mknod -m 666 ./${build_dir}/dev/zero c 1 5
 
mknod -m 666 ./${build_dir}/dev/tty c 5 0
 
 
 
We need or dns servers and root dir:
 
cp /etc/resolv.conf ./${build_dir}/etc/
 
mkdir -p ./${build_dir}/root
 
 
 
We are setting up apk mirrors:
 
mkdir -p ./${build_dir}/etc/apk
 
echo "${mirror}/packages/core" > ./${build_dir}/etc/apk/repositories
 
echo "${mirror}/packages/extra" >> ./${build_dir}/etc/apk/repositories
 
 
 
At this point you should be able to enter your chroot:
 
chroot ./${build_dir} /bin/sh
 
 
 
= Update a existing environment =
 

Latest revision as of 01:15, 2 April 2020