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# System-wide registries parsing tool
import sys
from abc import abstractmethod, ABCMeta
import yaml
import pytoml
import argparse
import json
import logging
import logging.handlers
import os
def log_warning(conf_file):
test = os.environ.get("TEST", 0)
if test == 0:
log = logging.getLogger(__name__)
log.setLevel(logging.DEBUG)
handler = logging.handlers.SysLogHandler(address = '/dev/log')
formatter = logging.Formatter('%(module)s.%(funcName)s: %(message)s')
handler.setFormatter(formatter)
log.addHandler(handler)
log.warning("{} is in YAML format and should be in TOML format. Back this file up and then "
"use /usr/libexec/registries_migrator -o /etc/containers/registries.conf to "
"convert it to TOML.".format(conf_file))
map_output = {
"registries.search": "--add-registry",
"registries.insecure": "--insecure-registry",
"registries.block": "--block-registry"
}
def write_file(filename, data):
dir_path = os.path.dirname(filename)
if not os.path.exists(dir_path):
os.makedirs(dir_path)
with open(filename,"w") as f:
f.write(data)
def normalize_registry(registry):
registry["registries"] = [x.rstrip("/") for x in registry["registries"]]
return registry
def to_dict(secure, insecure, block):
secure = normalize_registry(secure)
insecure = normalize_registry(insecure)
block = normalize_registry(block)
return {
"registries.search": {"registries": secure["registries"]},
"registries.insecure": {"registries": insecure["registries"]},
"registries.block": {"registries": block["registries"]}
}
def do_output(output, args):
if args.output:
if args.variable:
output = "{}=\"".format(args.variable) + output + "\""
write_file(args.output, output)
else:
sys.stdout.write("{}\n".format(output))
def to_string(config):
out_str = ""
for i in map_output:
for registry in config[i]['registries']:
out_str += "{} {} ".format(map_output[i], registry)
return out_str
class Conf(object): #pylint: disable=metaclass-assignment
# Mark the class as abstract
__metaclass__ = ABCMeta
@abstractmethod
def load(registries_conf_file):
pass
@abstractmethod
def get_registries(self, conf_file):
pass
class LoadError(Exception):
pass
class loadYAML(Conf):
@staticmethod
def load(registries_conf_file):
with open(registries_conf_file, 'r') as stream:
return yaml.load(stream)
@classmethod
def get_registries(cls, conf_file):
config = cls.load(conf_file)
_registries = []
_insecure = []
_block = []
if config is not None:
_registries = [] if "registries" not in config else config["registries"]
_insecure= [] if "insecure_registries" not in config else config['insecure_registries']
_block = [] if "block_registries" not in config else config['block_registries']
log_warning(conf_file)
return to_dict({"registries": _registries}, {"registries": _insecure}, {"registries": _block})
class loadTOML(Conf):
@staticmethod
def load(registries_conf_file):
with open(registries_conf_file, 'rb') as stream:
return pytoml.load(stream)
@classmethod
def get_registries(cls, conf_file):
config = cls.load(conf_file)
reg = config.get('registries', None)
if reg:
_registries = {"registries": []} if 'search' not in reg else reg['search']
_insecure = {"registries": []} if 'insecure' not in reg else reg['insecure']
_block = {"registries":[]} if "block" not in reg else reg['block']
else:
_registries = config.get("registries.search", {"registries": []})
_insecure = config.get("registries.insecure", {"registries": []})
_block = config.get("registries.block", {"registries": []})
return to_dict(_registries, _insecure, _block)
def load_config(registries_conf_file):
try:
registries = loadTOML.get_registries(registries_conf_file)
except (pytoml.TomlError, KeyError):
try:
registries = loadYAML.get_registries(registries_conf_file)
except yaml.YAMLError:
sys.stderr.write("Unable to load and parse {}\n.".format(registries_conf_file))
sys.exit(1)
return registries
def registries():
parser = argparse.ArgumentParser(description="Parse global registries configuration file")
parser.add_argument("-i", "--input", help="Specify an input file", default="/etc/containers/registries.conf")
parser.add_argument("-j", "--json", help="Output in JSON format", action="store_true")
parser.add_argument("-o", "--output", help="Specify an output file")
parser.add_argument("-V", "--variable", help="Specify a variable assignment")
args = parser.parse_args()
if args.variable and not args.output:
sys.stderr.write("You must use --output with -V")
sys.exit(1)
registries_config = load_config(args.input)
output = json.dumps(registries_config) if args.json else to_string(registries_config)
do_output(output, args)
if __name__ == '__main__':
registries()