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Tamarin
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Python wrapper with Docker backend with profiles

This commit is contained in:
wpetit 2017-03-21 23:05:16 +01:00
parent d99305182e
commit 9dc46f5665
10 changed files with 69 additions and 287 deletions
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16
README.md
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@ -1,6 +1,10 @@
# Tamarin
Usine à paquets expérimentale basée sur rkt/acbuild.
Usine à paquets GNU/Linux
## Statut
Expérimental
## Formats de paquets/distributions supportés
@ -9,11 +13,7 @@ Usine à paquets expérimentale basée sur rkt/acbuild.
## Dépendances
- [Python 3](https://www.python.org/downloads/)
- Un noyau Linux > 2.6.24 (avec support des cgroups)
**Optionnel mais conseillé**
- [systemd](https://freedesktop.org/wiki/Software/systemd/)
- [Docker](>= 17.03)
## Usage
@ -30,10 +30,6 @@ TODO
TODO
### Répertoire de travail et mise en cache des images
TODO
## Licence
GPLv3

26
hooks/containerbuild/debian/install-build-essential
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@ -2,26 +2,6 @@
set -e
${TAMARIN_ACBUILD} environment add DEBIAN_FRONTEND noninteractive
if [ "${TAMARIN_ACBUILD_ENGINE}" == 'chroot' ]; then
# Ugly fix for Python installation in chrooted environment (require /dev/urandom)
head -c 65536 /dev/urandom > ./urandom
${TAMARIN_ACBUILD} copy ./urandom /dev/urandom
fi
sudo -E /usr/bin/env bash - <<EOF
export PATH=${PATH}
${TAMARIN_ACBUILD} run --engine "${TAMARIN_ACBUILD_ENGINE}" -- apt-get update
${TAMARIN_ACBUILD} run --engine "${TAMARIN_ACBUILD_ENGINE}" -- apt-get install --yes --no-install-recommends build-essential devscripts equivs python3
EOF
if [ "${TAMARIN_ACBUILD_ENGINE}" == 'chroot' ]; then
# Clean up Python fix (see above)
sudo -E /usr/bin/env bash - <<EOF
export PATH=${PATH}
${TAMARIN_ACBUILD} run --engine "${TAMARIN_ACBUILD_ENGINE}" -- rm -f /dev/urandom
EOF
fi
${TAMARIN_ACBUILD} environment remove DEBIAN_FRONTEND
echo 'ENV DEBIAN_FRONTEND=noninteractive' >> Dockerfile
echo 'RUN apt-get update && apt-get install --yes --no-install-recommends build-essential devscripts equivs python3' >> Dockerfile
echo 'ENV DEBIAN_FRONTEND=' >> Dockerfile

10
hooks/containerbuild/debian/install-git
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@ -2,10 +2,6 @@
set -e
${TAMARIN_ACBUILD} environment add DEBIAN_FRONTEND noninteractive
sudo -E /usr/bin/env bash - <<EOF
export PATH=${PATH}
${TAMARIN_ACBUILD} run --engine "${TAMARIN_ACBUILD_ENGINE}" -- apt-get update
${TAMARIN_ACBUILD} run --engine "${TAMARIN_ACBUILD_ENGINE}" -- apt-get install --yes --no-install-recommends git-core
EOF
${TAMARIN_ACBUILD} environment remove DEBIAN_FRONTEND
echo 'ENV DEBIAN_FRONTEND=noninteractive' >> Dockerfile
echo 'RUN apt-get update && apt-get install --yes --no-install-recommends git-core' >> Dockerfile
echo 'ENV DEBIAN_FRONTEND=' >> Dockerfile

3
lib/build.py
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@ -1,6 +1,6 @@
import sys, os, argparse, tempfile
sys.path.append(os.path.dirname(__file__) + '/lib')
import tamarin, system, rkt
import tamarin
def get_args_parser():
parser = argparse.ArgumentParser(description="Tamarin's container entrypoint")
@ -12,7 +12,6 @@ def get_args_parser():
def get_buildtools_dir():
return os.path.realpath(os.path.dirname(os.path.abspath(__file__)) + "/buildtools")
if __name__ == '__main__':
parser = get_args_parser()

38
lib/rkt.py
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@ -1,38 +0,0 @@
import system, subprocess, os, tamarin, json, re
def run(args, as_root = False, capture_output=False, debug=False):
"""Run rkt with the specified args (use the local copy if rkt is not found in the $PATH)"""
rkt_bin = system.which('rkt', tamarin.get_workspace_subdir('rkt'))
cmd = ( ["sudo", "-E", rkt_bin] if os.geteuid() != 0 and as_root == True else [rkt_bin] ) + args
if debug:
print(" ".join(cmd))
if capture_output:
return subprocess.check_output(cmd, stdin=subprocess.PIPE)
else:
return subprocess.check_call(cmd, stdin=subprocess.PIPE)
def get_images_list(rkt_flags = [], debug=False):
output = run([
"image",
"list",
"--format=json"
] + rkt_flags, capture_output=True, debug=debug)
# Fetch the list of installed images
return json.loads(output.decode('utf-8'))
def find_image_by_name(name_pattern, rkt_flags = []):
if type(name_pattern) is str:
name_pattern = re.compile(name_pattern)
images_list = get_images_list(rkt_flags = rkt_flags)
for image in images_list:
if name_pattern.search(image['name']):
return image
return None
def export_image(image_id, dest_file, rkt_flags = [], debug=False):
run([
"image",
"export",
image_id,
dest_file,
] + rkt_flags, debug=debug)

29
lib/system.py
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@ -1,29 +0,0 @@
import tarfile, os
def extract_tar(file_path, dest_dir = ".", debug=False):
if debug:
print('Extracting "{:s}" to "{:s}"'.format(file_path, dest_dir))
with tarfile.open(file_path) as tar:
tar.extractall(dest_dir)
tar.close()
def which(program, additional_paths = None):
def is_exe(fpath):
return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
fpath, fname = os.path.split(program)
if fpath:
if is_exe(program):
return program
else:
paths = os.environ["PATH"].split(os.pathsep);
if additional_paths != None:
paths.append(additional_paths)
for path in paths:
path = path.strip('"')
exe_file = os.path.join(path, program)
if is_exe(exe_file):
return exe_file
return None

48
lib/tamarin.py
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@ -1,8 +1,6 @@
import os, glob, subprocess, configparser
import web, system
import codecs
import os, glob, subprocess, configparser, codecs, sys
def run_profile_hooks(profile, step, cwd=None, env=None, debug=False):
def run_profile_hooks(profile, step, **kwargs):
hooks_dir = get_hooks_dir()
step_hooks = profile[step]["hooks"]
if not step_hooks:
@ -12,7 +10,7 @@ def run_profile_hooks(profile, step, cwd=None, env=None, debug=False):
if not trimmed_hook_name:
continue
hook_path = os.path.join(hooks_dir, trimmed_hook_name)
code = subprocess.check_call(hook_path, cwd=cwd, stdin=subprocess.PIPE, env=env)
run([hook_path], **kwargs)
def get_hooks_dir():
return os.path.realpath(os.path.dirname(os.path.abspath(__file__)) + "/../hooks")
@ -51,37 +49,17 @@ def get_workspace_subdir(subdir):
os.makedirs(dir_path, exist_ok=True)
return dir_path
def get_acbuild_achive_dest_dir():
"""Return the first path matching the acbuild archive extraction destination in tamarin workspace"""
workspace_tmp = get_workspace_subdir('tmp')
return glob.glob(os.path.join(os.sep, workspace_tmp, 'acbuild-v*'))[0]
def get_rkt_achive_dest_dir():
"""Return the first path matching the rkt archive extraction destination in tamarin workspace"""
workspace_tmp = get_workspace_subdir('tmp')
return glob.glob(os.path.join(os.sep, workspace_tmp, 'rkt-v*'))[0]
def download_rkt(debug=False):
"""Download a local copy of rkt in the tamarin workspace and return the absolute path to the archive"""
url = "https://github.com/coreos/rkt/releases/download/v1.25.0/rkt-v1.25.0.tar.gz"
file_path=os.path.join(os.sep, get_workspace_subdir('tmp'), "rkt.tar.gz")
web.download_file(file_url=url, dest_path=file_path)
return file_path
def download_acbuild(debug=False):
"""Download a local copy of acbuild in the tamarin workspace and return the absolute path to the archive"""
url = "https://github.com/containers/build/releases/download/v0.4.0/acbuild-v0.4.0.tar.gz"
file_path=os.path.join(os.sep, get_workspace_subdir('tmp'), "acbuild.tar.gz")
web.download_file(file_url=url, dest_path=file_path)
return file_path
def run_acbuild(args, captureOutput=False, as_root=False, debug=False):
"""Run acbuild with the specified args (use the local copy if acbuild is not found in the $PATH)"""
acbuild_bin = system.which('acbuild', get_workspace_subdir('acbuild'))
cmd = ( ["sudo", "-E", acbuild_bin] if os.geteuid() != 0 and as_root == True else [acbuild_bin] ) + args
def run(cmd, captureOutput=False, pty=False, debug=False, **kwargs):
"""Execute an arbitrary command on the system"""
if debug:
print(" ".join(cmd))
stdin=subprocess.PIPE
if pty:
kwargs['stdin'] = sys.stdin
if captureOutput:
return subprocess.check_output(cmd, stdin=subprocess.PIPE)
return subprocess.check_output(cmd, **kwargs)
else:
return subprocess.check_call(cmd, stdin=subprocess.PIPE)
return subprocess.check_call(cmd, **kwargs)
def run_docker(args, captureOutput=False, **kwargs):
return run(["docker"] + args, captureOutput=captureOutput, **kwargs)

33
lib/web.py
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@ -1,33 +0,0 @@
from urllib import request
import math, sys
def print_progress_bar(percent_progress=0, char_size=50, clear_line=True):
bar_progress = math.floor(char_size*(percent_progress/100))
bar = "=" * bar_progress + " " * (char_size - bar_progress)
if clear_line:
sys.stdout.write(u"\u001b[1000D")
sys.stdout.write("[{:s}] {:d}%".format(bar, int(percent_progress)))
sys.stdout.flush()
def download_file(file_url, dest_path, bulk_size = 8192):
req = request.urlopen(file_url)
meta = req.info()
file_size = int(meta.get('Content-Length'))
with open(dest_path, 'wb') as dest_file:
print('Downloading "{:s}". Size: {:d}b'.format(file_url, file_size))
downloaded_size = 0
while True:
buff = req.read(bulk_size)
if not buff:
break
downloaded_size += len(buff)
dest_file.write(buff)
progress = downloaded_size/file_size*100
print_progress_bar(progress)
dest_file.close()
# Add linebreak
print("")

143
package
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@ -1,10 +1,10 @@
#!/usr/bin/env python3
import argparse, sys, shutil, os, hashlib
import argparse, sys, shutil, os, subprocess
sys.path.append(os.path.dirname(__file__) + '/lib')
import tamarin, system, rkt
import tamarin
def create_args_parser():
'''Return a new configured ArgumentParser'''
@ -20,80 +20,37 @@ def create_args_parser():
parser.add_argument("-b", "--base", help="Use the specified image instead of the profile's one", default='')
parser.add_argument("--rebuild", help="Ignore cache and rebuild container's image", action="store_true", default=False)
parser.add_argument("--debug", help="Will add extra output and start the container in interactive mode", action="store_true", default=False)
parser.add_argument("--cleanup", help="Clear the workspace and remove obsolete Docker images before build", action="store_true", default=False)
return parser
def download_and_extract_rkt(dest_dir, debug=False):
'''Download and extract rkt to the given destination directory'''
rkt_archive_path = tamarin.download_rkt(debug=debug)
system.extract_tar(rkt_archive_path, workspace_tmp, debug=debug)
rkt_archive_dir = tamarin.get_rkt_achive_dest_dir()
shutil.rmtree(local_rkt_dir, ignore_errors=True)
os.rename(rkt_archive_dir, dest_dir)
def build_image(build_workspace, base_image, profile_name, profile, debug=False, rebuild=False):
def download_and_extract_acbuild(dest_dir, debug=False):
'''Download and extract acbuild to the given destination directory'''
acbuild_archive_path = tamarin.download_acbuild(debug=debug)
system.extract_tar(acbuild_archive_path, workspace_tmp, debug=debug)
acbuild_archive_dir = tamarin.get_acbuild_achive_dest_dir()
shutil.rmtree(local_acbuild_dir, ignore_errors=True)
os.rename(acbuild_archive_dir, dest_dir)
def get_cached_image_path(profile, debug=False):
'''Compute and return the path for an hypothetic cached image for the given profile'''
containerbuild_hooks = profile['containerbuild']['hooks']
hasher = hashlib.sha1()
hasher.update(base_image.encode())
hasher.update(containerbuild_hooks.encode())
image_hash = hasher.hexdigest()
cache_dir = tamarin.get_workspace_subdir('cache')
return os.path.join(os.sep, cache_dir, '{:s}.aci'.format(image_hash[:12]));
def build_image(build_workspace, aci_file, base_image, profile, debug=False):
acbuild_flags = ["--work-path", build_workspace]
# Find and export base image from rkt' store
name_pattern = base_image.split('/')[-1] + '$'
image = rkt.find_image_by_name(name_pattern, rkt_flags=rkt_flags)
rkt.export_image(image['id'], aci_file, rkt_flags=rkt_flags, debug=debug);
# Build image
tamarin.run_acbuild(acbuild_flags+["begin", aci_file], debug=debug)
tamarin.run_acbuild(acbuild_flags+["set-name", "image_{:d}".format(pid)], debug=debug)
tamarin.run_acbuild(acbuild_flags+["mount", "add", "src", "/src", "--read-only"], debug=debug)
tamarin.run_acbuild(acbuild_flags+["mount", "add", "dist", "/dist"], debug=debug)
tamarin.run_acbuild(acbuild_flags+["mount", "add", "tamarin-hooks", "/tamarin/hooks", "--read-only"], debug=debug)
tamarin.run_acbuild(acbuild_flags+["mount", "add", "tamarin-lib", "/tamarin/lib", "--read-only"], debug=debug)
tamarin.run_acbuild(acbuild_flags+["mount", "add", "tamarin-profiles", "/tamarin/profiles", "--read-only"], debug=debug)
with open("{:s}/Dockerfile".format(build_workspace), 'w') as dockerfile:
dockerfile.write("FROM {:s}\n".format(base_image))
# Configure "containerbuild" hooks environment
hooks_env = os.environ.copy()
hooks_env["PATH"] = os.environ['PATH'] + ':' + tamarin.get_workspace_subdir('acbuild')
hooks_env["TAMARIN_ACBUILD"] = " ".join([system.which('acbuild', local_acbuild_dir)]+acbuild_flags)
hooks_env["TAMARIN_ACBUILD_ENGINE"] = "chroot" if not system.which('systemctl') else "systemd-nspawn"
hooks_env["PATH"] = os.environ['PATH'] + ':' + tamarin.get_lib_dir()
# Run hooks
tamarin.run_profile_hooks(profile, 'containerbuild', cwd=build_workspace, env=hooks_env, debug=debug)
tamarin.run_acbuild(acbuild_flags+["write", "--overwrite", aci_file], as_root=True, debug=debug)
tamarin.run_acbuild(acbuild_flags+["end"], as_root=True, debug=debug)
image_tag = "tamarin:{:s}_{:s}_{:d}".format(profile_name, base_image.replace(':', '_'), os.getpid())
return aci_file
build_args = [ "build", "-t", image_tag ]
def cleanup(build_workspace, rkt_flags, debug=False):
if rebuild:
build_args += [ "--no-cache" ]
# Nettoyage des conteneurs
rkt.run([
"gc",
"--grace-period=0"
] + rkt_flags, as_root=True, debug=debug)
tamarin.run_docker(build_args + [build_workspace], debug=debug)
# Nettoyage des images obsolètes du store
rkt.run([
"image",
"gc"
] + rkt_flags, as_root=True, debug=debug)
return image_tag
def cleanup(build_workspace=None, debug=False):
if build_workspace == None:
build_workspace = tamarin.get_workspace_subdir('tmp')
# Suppression de l'espace de travail de build
shutil.rmtree(build_workspace, ignore_errors=True)
@ -108,6 +65,9 @@ if __name__ == "__main__":
validate_args(args)
if args.cleanup:
cleanup(debug=args.debug)
# Verify project directory
project_dir = os.path.abspath(args.project_directory)
output_dir = os.path.abspath(args.output)
@ -116,69 +76,42 @@ if __name__ == "__main__":
profile = tamarin.load_profile(args.profile, debug=args.debug)
workspace = tamarin.get_workspace_dir()
workspace_tmp = tamarin.get_workspace_subdir('tmp')
local_rkt_dir = tamarin.get_workspace_subdir('rkt')
if not system.which('rkt', local_rkt_dir):
download_and_extract_rkt(local_rkt_dir)
local_acbuild_dir = tamarin.get_workspace_subdir('acbuild')
if not system.which('acbuild', local_acbuild_dir):
download_and_extract_acbuild(local_acbuild_dir)
pid = os.getpid()
build_workspace = tamarin.get_workspace_subdir('tmp/build_{:d}'.format(pid))
rkt_store = tamarin.get_workspace_subdir('store')
rkt_flags = ["--dir={:s}".format(rkt_store)]
base_image = args.base if args.base != '' else profile['profile']['default_image']
# If the base image is Docker-based, download it
if base_image.startswith('docker://'):
rkt.run([
"fetch",
"--insecure-options=image",
base_image
] + rkt_flags, debug=args.debug)
aci_file = os.path.join(os.sep, build_workspace, 'image.aci')
cached_image_file = get_cached_image_path(profile, debug=args.debug)
if not args.rebuild and os.path.exists(cached_image_file):
# Copy cached image
shutil.copyfile(cached_image_file, aci_file)
else:
build_image(build_workspace, aci_file, base_image, profile, debug=args.debug)
# Cache image
shutil.copyfile(aci_file, cached_image_file)
image_tag = build_image(build_workspace, base_image, args.profile, profile, debug=args.debug, rebuild=args.rebuild)
# rkt run arguments
rkt_args = [
docker_args = [
"run",
"--insecure-options=image",
aci_file, "--net=host",
"--volume=src,kind=host,source={:s}".format(project_dir),
"--volume=dist,kind=host,source={:s}".format(output_dir),
"--volume=tamarin-hooks,kind=host,source={:s}".format(tamarin.get_hooks_dir()),
"--volume=tamarin-lib,kind=host,source={:s}".format(tamarin.get_lib_dir()),
"--volume=tamarin-profiles,kind=host,source={:s}".format(tamarin.get_profiles_dir())
"--rm",
"-v", "{:s}:/src:ro".format(project_dir),
"-v", "{:s}:/dist".format(output_dir),
"-v", "{:s}:/tamarin/hooks:ro".format(tamarin.get_hooks_dir()),
"-v", "{:s}:/tamarin/lib:ro".format(tamarin.get_lib_dir()),
"-v", "{:s}:/tamarin/profiles:ro".format(tamarin.get_profiles_dir())
]
# Use environment proxy if defined
for proxy_var in ['HTTP_PROXY', 'HTTPS_PROXY', 'http_proxy', 'https_proxy']:
if proxy_var in os.environ:
rkt_args += ["--set-env={:s}={:s}".format(proxy_var, os.environ[proxy_var])]
docker_args += ["-e", "{:s}={:s}".format(proxy_var, os.environ[proxy_var])]
kwargs = dict()
kwargs['debug'] = args.debug
if args.debug:
rkt_args += ["--interactive", "--exec", "/bin/bash"]
kwargs['pty'] = True
docker_args += ["-it", image_tag, "/bin/sh"]
helper_cmd = " ".join(["/usr/bin/python3", "/tamarin/lib/build.py", args.profile, args.architecture])
print("Executer '{:s}' pour lancer la construction du paquet.".format(helper_cmd))
else:
rkt_args += ["--exec", "/usr/bin/python3", "--", "/tamarin/lib/build.py", args.profile, args.architecture]
docker_args += [image_tag, "/usr/bin/python3", "/tamarin/lib/build.py", args.profile, args.architecture]
# Start container
rkt.run(rkt_flags+rkt_args, as_root=True, debug=args.debug)
tamarin.run_docker(docker_args, **kwargs)
# Cleanup
cleanup(build_workspace, rkt_flags, debug=args.debug)
cleanup(build_workspace, debug=args.debug)

2
profiles/debian.conf
View File

@ -1,7 +1,7 @@
# Configuration générale du profil
[profile]
# Image Docker par défaut
default_image=docker://debian:jessie
default_image=debian:jessie
# Configuration de l'étape de pré-construction du conteneur
[containerbuild]