forked from platypush/platypush
Rewritten platydock utility.
Platydock now will only print out a Dockerfile given a configuration file. No more maintaining the state of containers, storing separate workdirs and configuration directories etc. - that introduced way too much overhead over Docker.
This commit is contained in:
parent
9002f3034a
commit
980af16984
GPG key ID:
D90FBA7F76362774
1 changed files with 76 additions and 430 deletions
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@ -1,462 +1,108 @@
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"""
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Platydock
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Platydock is a helper that allows you to easily manage (create, destroy, start,
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stop and list) Platypush instances as Docker images.
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Platydock is a helper script that allows you to automatically create a
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Dockerfile for Platypush starting from a configuration file.
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"""
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import argparse
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import enum
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import inspect
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import os
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import pathlib
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import re
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import shutil
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import subprocess
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import sys
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import textwrap
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import traceback as tb
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import yaml
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from typing import Iterable
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from platypush.config import Config
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from platypush.utils import manifest
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from platypush.utils.manifest import Dependencies
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workdir = os.path.join(
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os.path.expanduser('~'), '.local', 'share', 'platypush', 'platydock'
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)
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ERR_PREFIX = '\n\033[6;31;47mERROR\033[0;91m '
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ERR_SUFFIX = '\033[0m'
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class Action(enum.Enum):
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build = 'build'
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start = 'start'
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stop = 'stop'
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rm = 'rm'
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ls = 'ls'
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def generate_dockerfile(cfgfile: str) -> str:
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"""
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Generate a Dockerfile based on a configuration file.
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def __str__(self):
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return self.value
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def _parse_deps(cls):
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deps = []
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for line in cls.__doc__.split('\n'):
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m = re.search(r'\(``pip install (.+)``\)', line)
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if m:
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deps.append(m.group(1))
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return deps
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def generate_dockerfile(deps, ports, cfgfile, device_dir, python_version):
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device_id = Config.get('device_id')
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if not device_id:
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raise RuntimeError(
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(
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'You need to specify a device_id in {} - Docker '
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+ 'containers cannot rely on hostname'
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).format(cfgfile)
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:param cfgfile: Path to the configuration file.
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:return: The content of the generated Dockerfile.
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"""
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Config.init(cfgfile)
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new_file_lines = []
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ports = _get_exposed_ports()
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deps = Dependencies.from_config(cfgfile, pkg_manager='apk')
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is_after_expose_cmd = False
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base_file = os.path.join(
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str(pathlib.Path(inspect.getfile(Config)).parent), 'docker', 'base.Dockerfile'
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)
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os.makedirs(device_dir, exist_ok=True)
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content = textwrap.dedent(
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'''
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FROM python:{python_version}-slim-bookworm
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with open(base_file, 'r') as f:
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file_lines = [line.rstrip() for line in f.readlines()]
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RUN mkdir -p /app
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RUN mkdir -p /etc/platypush
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RUN mkdir -p /usr/local/share/platypush\n
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'''.format(
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python_version=python_version
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)
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).lstrip()
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for line in file_lines:
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if line.startswith('RUN cd /install '):
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for new_line in deps.before:
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new_file_lines.append('RUN ' + new_line)
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srcdir = os.path.dirname(cfgfile)
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cfgfile_copy = os.path.join(device_dir, 'config.yaml')
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shutil.copy(cfgfile, cfgfile_copy, follow_symlinks=True)
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content += 'COPY config.yaml /etc/platypush/\n'
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backend_config = Config.get_backends()
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# Redis configuration for Docker
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if 'redis' not in backend_config:
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backend_config['redis'] = {
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'redis_args': {
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'host': 'redis',
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'port': 6379,
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}
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}
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with open(cfgfile_copy, 'a') as f:
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f.write(
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'\n# Automatically added by platydock, do not remove\n'
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+ yaml.dump(
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{
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'backend.redis': backend_config['redis'],
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}
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)
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+ '\n'
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)
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# Main database configuration
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has_main_db = False
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with open(cfgfile_copy, 'r') as f:
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for line in f.readlines():
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if re.match(r'^(main.)?db.*', line):
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has_main_db = True
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break
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if not has_main_db:
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with open(cfgfile_copy, 'a') as f:
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f.write(
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'\n# Automatically added by platydock, do not remove\n'
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+ yaml.dump(
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{
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'main.db': {
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'engine': 'sqlite:////platypush.db',
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}
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}
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)
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+ '\n'
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)
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# Copy included files
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# noinspection PyProtectedMember
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for include in Config._included_files:
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incdir = os.path.relpath(os.path.dirname(include), srcdir)
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destdir = os.path.join(device_dir, incdir)
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pathlib.Path(destdir).mkdir(parents=True, exist_ok=True)
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shutil.copy(include, destdir, follow_symlinks=True)
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content += 'RUN mkdir -p /etc/platypush/' + incdir + '\n'
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content += (
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'COPY '
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+ os.path.relpath(include, srcdir)
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+ ' /etc/platypush/'
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+ incdir
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+ '\n'
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)
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# Copy script files
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scripts_dir = os.path.join(os.path.dirname(cfgfile), 'scripts')
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if os.path.isdir(scripts_dir):
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local_scripts_dir = os.path.join(device_dir, 'scripts')
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remote_scripts_dir = '/etc/platypush/scripts'
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shutil.copytree(
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scripts_dir, local_scripts_dir, symlinks=True, dirs_exist_ok=True
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)
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content += f'RUN mkdir -p {remote_scripts_dir}\n'
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content += f'COPY scripts/ {remote_scripts_dir}\n'
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packages = deps.pop('packages', None)
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pip = deps.pop('pip', None)
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exec_cmds = deps.pop('exec', None)
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pkg_cmd = (
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f'\n\t&& apt-get install --no-install-recommends -y {" ".join(packages)} \\'
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if packages
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else ''
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)
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pip_cmd = f'\n\t&& pip install {" ".join(pip)} \\' if pip else ''
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content += f'''
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RUN dpkg --configure -a \\
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&& apt-get -f install \\
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&& apt-get --fix-missing install \\
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&& apt-get clean \\
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&& apt-get update \\
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&& apt-get -y upgrade \\
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&& apt-get -y dist-upgrade \\
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&& apt-get install --no-install-recommends -y apt-utils \\
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&& apt-get install --no-install-recommends -y build-essential \\
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&& apt-get install --no-install-recommends -y git \\
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&& apt-get install --no-install-recommends -y sudo \\
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&& apt-get install --no-install-recommends -y libffi-dev \\
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&& apt-get install --no-install-recommends -y libcap-dev \\
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&& apt-get install --no-install-recommends -y libjpeg-dev \\{pkg_cmd}{pip_cmd}'''
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for exec_cmd in exec_cmds:
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content += f'\n\t&& {exec_cmd} \\'
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content += '''
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&& apt-get install --no-install-recommends -y zlib1g-dev
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RUN git clone --recursive https://git.platypush.tech/platypush/platypush.git /app \\
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&& cd /app \\
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&& pip install -r requirements.txt
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RUN apt-get remove -y git \\
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&& apt-get remove -y build-essential \\
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&& apt-get remove -y libffi-dev \\
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&& apt-get remove -y libjpeg-dev \\
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&& apt-get remove -y libcap-dev \\
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&& apt-get remove -y zlib1g-dev \\
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&& apt-get remove -y apt-utils \\
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&& apt-get clean \\
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&& apt-get autoremove -y \\
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&& rm -rf /var/lib/apt/lists/*
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'''
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for port in ports:
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content += 'EXPOSE {}\n'.format(port)
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content += textwrap.dedent(
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'''
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ENV PYTHONPATH /app:$PYTHONPATH
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CMD ["python", "-m", "platypush"]
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'''
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)
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dockerfile = os.path.join(device_dir, 'Dockerfile')
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print('Generating Dockerfile {}'.format(dockerfile))
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with open(dockerfile, 'w') as f:
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f.write(content)
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def build(args):
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global workdir
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ports = set()
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parser = argparse.ArgumentParser(
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prog='platydock build', description='Build a Platypush image from a config.yaml'
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)
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parser.add_argument(
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'-c',
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'--config',
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type=str,
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required=True,
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help='Path to the platypush configuration file',
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)
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parser.add_argument(
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'-p',
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'--python-version',
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type=str,
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default='3.9',
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help='Python version to be used',
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)
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opts, args = parser.parse_known_args(args)
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cfgfile = os.path.abspath(os.path.expanduser(opts.config))
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manifest._available_package_manager = (
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'apt' # Force apt for Debian-based Docker images
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)
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install_cmds = manifest.get_dependencies_from_conf(cfgfile)
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python_version = opts.python_version
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backend_config = Config.get_backends()
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# Container exposed ports
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if backend_config.get('http'):
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from platypush.backend.http import HttpBackend
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# noinspection PyProtectedMember
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ports.add(backend_config['http'].get('port', HttpBackend._DEFAULT_HTTP_PORT))
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if backend_config.get('tcp'):
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ports.add(backend_config['tcp']['port'])
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dev_dir = os.path.join(workdir, Config.get('device_id'))
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generate_dockerfile(
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deps=dict(install_cmds),
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ports=ports,
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cfgfile=cfgfile,
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device_dir=dev_dir,
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python_version=python_version,
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)
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subprocess.call(
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[
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'docker',
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'build',
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'-t',
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'platypush-{}'.format(Config.get('device_id')),
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dev_dir,
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]
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)
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def start(args):
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global workdir
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parser = argparse.ArgumentParser(
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prog='platydock start',
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description='Start a Platypush container',
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epilog=textwrap.dedent(
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'''
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You can append additional options that
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will be passed to the docker container.
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Example:
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--add-host='myhost:192.168.1.1'
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'''
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),
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)
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parser.add_argument('image', type=str, help='Platypush image to start')
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parser.add_argument(
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'-p',
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'--publish',
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action='append',
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nargs='*',
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default=[],
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help=textwrap.dedent(
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'''
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Container's ports to expose to the host.
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Note that the default exposed ports from
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the container service will be exposed unless
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these mappings override them (e.g. port 8008
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on the container will be mapped to 8008 on
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the host).
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Example:
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-p 18008:8008
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'''
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),
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)
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parser.add_argument(
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'-a',
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'--attach',
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action='store_true',
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default=False,
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help=textwrap.dedent(
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'''
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If set, then attach to the container after starting it up (default: false).
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'''
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),
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)
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opts, args = parser.parse_known_args(args)
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ports = {}
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dockerfile = os.path.join(workdir, opts.image, 'Dockerfile')
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with open(dockerfile) as f:
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for line in f:
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m = re.match(r'expose (\d+)', line.strip().lower())
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if m:
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ports[m.group(1)] = m.group(1)
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for mapping in opts.publish:
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host_port, container_port = mapping[0].split(':')
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ports[container_port] = host_port
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print('Preparing Redis support container')
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subprocess.call(['docker', 'pull', 'redis'])
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subprocess.call(
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['docker', 'run', '--rm', '--name', 'redis-' + opts.image, '-d', 'redis']
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)
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docker_cmd = [
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'docker',
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'run',
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'--rm',
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'--name',
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opts.image,
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'-it',
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'--link',
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'redis-' + opts.image + ':redis',
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]
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for container_port, host_port in ports.items():
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docker_cmd += ['-p', host_port + ':' + container_port]
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docker_cmd += args
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docker_cmd += ['-d', 'platypush-' + opts.image]
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print('Starting Platypush container {}'.format(opts.image))
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subprocess.call(docker_cmd)
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if opts.attach:
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subprocess.call(['docker', 'attach', opts.image])
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def stop(args):
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parser = argparse.ArgumentParser(
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prog='platydock stop', description='Stop a Platypush container'
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)
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parser.add_argument('container', type=str, help='Platypush container to stop')
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opts, args = parser.parse_known_args(args)
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print('Stopping Platypush container {}'.format(opts.container))
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subprocess.call(['docker', 'kill', '{}'.format(opts.container)])
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print('Stopping Redis support container')
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subprocess.call(['docker', 'stop', 'redis-{}'.format(opts.container)])
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def rm(args):
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global workdir
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parser = argparse.ArgumentParser(
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prog='platydock rm',
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description='Remove a Platypush image. '
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+ 'NOTE: make sure that no container is '
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+ 'running nor linked to the image before '
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+ 'removing it',
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)
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parser.add_argument('image', type=str, help='Platypush image to remove')
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opts, args = parser.parse_known_args(args)
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subprocess.call(['docker', 'rmi', 'platypush-{}'.format(opts.image)])
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shutil.rmtree(os.path.join(workdir, opts.image), ignore_errors=True)
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def ls(args):
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parser = argparse.ArgumentParser(
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prog='platydock ls', description='List available Platypush containers'
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)
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parser.add_argument('filter', type=str, nargs='?', help='Image name filter')
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opts, args = parser.parse_known_args(args)
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p = subprocess.Popen(['docker', 'images'], stdout=subprocess.PIPE)
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output = p.communicate()[0].decode().split('\n')
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header = output.pop(0)
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images = []
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for line in output:
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if re.match(r'^platypush-(.+?)\s.*', line) and (
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not opts.filter or (opts.filter and opts.filter in line)
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for new_line in deps.to_pkg_install_commands(
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pkg_manager='apk', skip_sudo=True
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):
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images.append(line)
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new_file_lines.append('RUN ' + new_line)
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elif line == 'RUN rm -rf /install':
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for new_line in deps.to_pip_install_commands():
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new_file_lines.append('RUN ' + new_line)
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if images:
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print(header)
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for new_line in deps.after:
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new_file_lines.append('RUN' + new_line)
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elif line.startswith('EXPOSE ') and ports:
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if not is_after_expose_cmd:
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new_file_lines.extend([f'EXPOSE {port}' for port in ports])
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is_after_expose_cmd = True
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for image in images:
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print(image)
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continue
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|
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new_file_lines.append(line)
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return '\n'.join(new_file_lines)
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def _get_exposed_ports() -> Iterable[int]:
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"""
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:return: The listen ports used by the backends enabled in the configuration
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file.
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"""
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backends_config = Config.get_backends()
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return {
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int(port)
|
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for port in (
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backends_config.get('http', {}).get('port'),
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backends_config.get('tcp', {}).get('port'),
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)
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if port
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}
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|
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def main():
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"""
|
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Generates a Dockerfile based on the configuration file.
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"""
|
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parser = argparse.ArgumentParser(
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prog='platydock',
|
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add_help=False,
|
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description='Manage Platypush docker containers',
|
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epilog='Use platydock <action> --help to ' + 'get additional help',
|
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description='Create a Platypush Dockerfile from a config.yaml.',
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||||
epilog='Use platydock <action> --help to get additional help.',
|
||||
)
|
||||
|
||||
# noinspection PyTypeChecker
|
||||
parser.add_argument(
|
||||
'action', nargs='?', type=Action, choices=list(Action), help='Action to execute'
|
||||
)
|
||||
parser.add_argument('-h', '--help', action='store_true', help='Show usage')
|
||||
opts, args = parser.parse_known_args(sys.argv[1:])
|
||||
parser.add_argument(
|
||||
'cfgfile', type=str, nargs=1, help='The path to the configuration file.'
|
||||
)
|
||||
|
||||
if (opts.help and not opts.action) or (not opts.help and not opts.action):
|
||||
parser.print_help()
|
||||
return 1
|
||||
|
||||
globals()[str(opts.action)](sys.argv[2:])
|
||||
opts, _ = parser.parse_known_args(sys.argv[1:])
|
||||
cfgfile = os.path.abspath(os.path.expanduser(opts.cfgfile[0]))
|
||||
dockerfile = generate_dockerfile(cfgfile)
|
||||
print(dockerfile)
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
ERR_PREFIX = '\n\033[6;31;47mERROR\033[0;91m '
|
||||
ERR_SUFFIX = '\033[0m'
|
||||
|
||||
try:
|
||||
main()
|
||||
except Exception as e:
|
||||
tb.print_exc(file=sys.stdout)
|
||||
print(ERR_PREFIX + str(e) + ERR_SUFFIX, file=sys.stderr)
|
||||
|
||||
|
||||
# vim:sw=4:ts=4:et:
|
||||
|
|
|
|||
Loading…
Reference in a new issue