Initial commit

master
Gilles Grandou 1 year ago
commit 13930c94ed
  1. 177
      runon
  2. 53
      runon.conf

177
runon

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#!/usr/bin/env python3
import sys
import argparse
import docker
import dockerpty
import io
import json
import getpass
import platform
import os
import re
import xdg.BaseDirectory
import configparser
import subprocess
from pprint import pprint
def load_config(user_confname, osname):
ini_list = [ 'runon.conf', '.runon.conf', os.path.join(xdg.BaseDirectory.xdg_config_home, 'runon', 'runon.conf'), '/etc/runon/runon.conf' ]
defaults = {
'osname': osname,
'user': getpass.getuser()
}
if user_confname:
ini_list.insert(0, user_confname)
ini = configparser.ConfigParser(defaults=defaults, interpolation=configparser.ExtendedInterpolation())
ini.read(ini_list)
if not ini.has_section(osname):
print('ERROR: cannot find configuration for distribution "{}"'.format(osname))
sys.exit(1)
conf = {}
fields = [ 'dockerfile', 'pkginstall', 'packages', 'environment', 'binds', 'user', 'osname' ]
try:
for f in fields:
conf[f] = ini.get(osname, f)
except configparser.NoOptionError as e:
print('ERROR: {}'.format(e))
sys.exit(1)
for f in [ 'dockerfile', 'environment', 'binds' ]:
conf[f] = [ i for i in conf[f].split('\n') if i ]
for f in [ 'packages' ]:
conf[f] = conf[f].split()
return conf
def make_image_name(osname):
user = getpass.getuser()
name = 'runon-{}-{}'.format(osname, user)
return name
def build_image(client, conf, update, verbose):
packages = conf['packages']
dockerfile = conf['dockerfile']
pkginstall = conf['pkginstall']
for p in packages:
dockerfile.append(pkginstall.format(p))
tag = make_image_name(conf['osname'])
try:
if verbose:
# fallback to external command 'docker build' as there is
# no way to follow the build progress with API.
print('Building image {} ...'.format(tag))
cmd = ['docker', 'build']
if update:
cmd.append('--no-cache')
cmd += ['-t', tag, '-']
ret = subprocess.run(cmd,
input='\n'.join(dockerfile).encode('utf-8'),
stderr=subprocess.STDOUT, check=True)
image = client.images.get(tag)
else:
with io.BytesIO('\n'.join(dockerfile).encode('utf-8')) as fd:
image, logs = client.images.build(tag=tag, fileobj=fd, rm=True, nocache=update)
if verbose:
print('Built image {} / {}'.format(image.tags[0], image.short_id))
for l in logs:
print(l.get('stream', '').strip('\n'))
except (docker.errors.BuildError, KeyboardInterrupt, subprocess.CalledProcessError, docker.errors.ImageNotFound) as e:
print('Build Error: {}'.format(e))
print()
print('with dockerfile:')
for line in dockerfile:
print(' {}'.format(line))
sys.exit(1)
return image
def create_container(client, image, conf, command, verbose):
volumes = {}
environment = {}
for mnt in conf['binds']:
mnt = mnt.split(':')
if mnt[-1] in ['ro','rw']:
mode = mnt[-1]
del mnt[-1]
else:
mode = 'rw'
mnt = mnt[:2]
bind = mnt[-1]
vol = mnt[0]
volumes[vol] = { 'bind': bind, 'mode': mode }
hostname = platform.node()
for v in conf['environment']:
e = v.split('=')
if len(e) == 1:
e.append(os.getenv(e[0]))
environment[e[0]] = e[1]
#environment['debian_chroot']=conf['osname']
user='{}:{}'.format(os.getuid(), os.getgid())
pwd=os.getcwd()
container = client.containers.create(image, command,
detach=False, stdin_open=True, tty=True,
auto_remove=True,
hostname=hostname,
volumes=volumes,
environment=environment,
user=user,
network_mode='host',
working_dir=pwd
)
return container
def run_container(client, container):
dockerpty.start(client.api, container.id)
container.reload() # to update attrs fields
ret = container.attrs['State']['ExitCode']
return ret
def main():
osname = None
run_name = os.path.basename(os.sys.argv[0])
if run_name == 'runos':
pass
elif run_name.startswith('runon'):
m = re.match('runon[-_]?(.*)$', run_name)
if m:
osname = m[1]
else:
osname = run_name
parser = argparse.ArgumentParser()
if osname:
parser.description = 'run commands on "{}" distribution'.format(osname)
else:
parser.description = 'run commands on any distribution'
parser.add_argument('osname',
help = 'distribution name to run on')
parser.add_argument('-v', '--verbose', action='store_true',
help='verbose output')
parser.add_argument('-c', '--config',
help='specify config file')
parser.add_argument('-u', '--update', action='store_true',
help='force image update')
parser.add_argument('command', nargs='*', default=None,
help = 'command to execute')
args = parser.parse_args()
if osname:
args.osname = osname
client = docker.from_env()
conf = load_config(args.config, args.osname)
image = build_image(client, conf, args.update, args.verbose)
container = create_container(client, image, conf, args.command, args.verbose)
ret = run_container(client, container)
return ret
if __name__ == '__main__':
ret = main()
sys.exit(ret)

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[DEFAULT]
environment =
HOME
USER
DISPLAY
debian_chroot=${osname}
binds =
/etc/passwd:ro
/etc/group:ro
/etc/shadow:ro
/tmp/.X11-unix:ro
/home/${user}
[centos7]
dockerfile =
FROM centos:7
RUN yum install sudo -y
RUN echo "Defaults lecture = never" >> /etc/sudoers
RUN echo "ALL ALL=(ALL) ALL" >> /etc/sudoers
pkginstall = RUN yum install {} -y
packages = ksh csh xterm xorg-x11-apps xkeyboard-config git
[centos8]
dockerfile =
FROM centos:8
RUN yum install dnf-plugins-core -y
RUN yum config-manager --set-enabled powertools -y
RUN yum install sudo -y
RUN echo "Defaults lecture = never" >> /etc/sudoers
RUN echo "ALL ALL=(ALL) ALL" >> /etc/sudoers
pkginstall = RUN yum install {} -y
packages = ksh csh xterm xorg-x11-apps xkeyboard-config git
[debian9]
dockerfile =
FROM debian:9
RUN apt-get update
RUN apt-get -y install sudo
RUN echo "Defaults lecture = never" >> /etc/sudoers
pkginstall = RUN apt-get -y install {}
packages = ksh csh xterm x11-apps libgtk-3-0 build-essential git
[ubuntu20.04]
dockerfile =
FROM ubuntu:20.04
RUN apt-get update
RUN apt-get -y install sudo
pkginstall = RUN apt-get -y install {}
packages = ksh csh xterm x11-apps build-essential git
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