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examples/bind9/bind9-build.pl  view on Meta::CPAN

#!/usr/bin/perl 
# FILE: bind9-build.pl
# USAGE: ./bind9-build.pl  
# ABSTRACT: example script for Container::Buildah which builds the current version of BIND9 for Alpine
# DESCRIPTION:
#    ISC BIND9 container - custom APK build of current BIND9 so we don't have to depend on when Alpine releases
#    an APK of the current version. This is a 2-stage build which makes the BIND9 APKs in the first stage, and
#    uses the results of that in the runtime stage without keeping the compiler & build tools from the first stage.
#    Note: this depend on updating the script to have the current BIND9 version number and sha512sum
# AUTHOR: Ian Kluft
# LICENSE: Apache License version 2

use strict;
use warnings;
use Modern::Perl qw(2018); # require security updates
use utf8;
use autodie;

use Readonly;
use Container::Buildah;

#
# configuration
#

# directory for build stage to make its APKs, not saved for other stages
Readonly::Scalar my $apkbuild_dir => "/opt/bind9-apkbuild";

# directory for build stage to save its APK product files, saved for runtime stage
Readonly::Scalar my $apk_dir => "/opt/bind9-apk";

# number of APKs which should be found (excluding unused dev, doc, openrc)
Readonly::Scalar my $apk_total => 7;

# container parameters
Container::Buildah::init_config(
	basename => "bind9",
	base_image => 'docker://docker.io/alpine:[% alpine_version %]',
	required_config => [qw(alpine_version bind_version bind_src_sha512sum)],
	stages => {
		build => {
			from => "[% base_image %]",
			func_deps => \&do_deps,
			func_exec => \&stage_build,
			produces => [$apk_dir],
			user => "named:named",
			user_home => $apkbuild_dir,
		},
		runtime => {
			from => "[% base_image %]",
			consumes => [qw(build)],
			func_deps => \&do_deps,
			func_exec => \&stage_runtime,
			user => "named:named",
			user_home => "/home/bind9",
			commit => ["[% basename %]:[% bind_version %]", "[% basename %]:latest"],
		}
	},
	bind_src_file => "bind-[% bind_version %].tar.xz",
	bind_apk_src => "https://git.alpinelinux.org/aports/plain/main/bind/?h=master",
);

# dependency installation function for both stages
sub do_deps
{
	my $stage = shift;

	$stage->run(
		# install updates for APKs at this Alpine OS release level
		[qw(/sbin/apk --no-cache update)],

		# install shadow as a dependency for user/user_home configuration
		# TODO add auto-dependency for configs based on Linux distro type (Alpine, Debian, Ubuntu, Fedora, CentOS/RHEL)
		[qw(/sbin/apk add --no-cache shadow)],
	);