129 lines
3.4 KiB
Python
129 lines
3.4 KiB
Python
import os
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import docker
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import json
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DOCKER_BASE_URL = os.environ.get('DOCKER_BASE_URL') or "unix://var/run/docker.sock"
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VOLUME_TYPE_BIND = "bind"
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VOLUME_TYPE_VOLUME = "volume"
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class Container:
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def __init__(self, data):
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self.id = data.get('Id')
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self.names = data.get('Names')
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self.mounts = [Mount(mnt, container=self) for mnt in data.get('Mounts')]
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def to_dict(self):
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return {
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"Id": self.id,
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"Mounts": [mnt.data for mnt in self.mounts]
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}
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class Mount:
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"""Mount wrapper"""
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def __init__(self, data, container=None):
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self.data = data
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self._container = container
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@property
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def container(self):
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return self._container
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@property
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def type(self):
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return self.data.get('Type')
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@property
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def name(self):
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return self.data.get('Name')
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@property
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def source(self):
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return self.data.get('Source')
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@property
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def destination(self):
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return self.data.get('Destination')
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@property
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def driver(self):
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return self.data.get('Driver')
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@property
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def mode(self):
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return self.data.get('Mode')
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@property
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def rw(self):
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return self.data.get('RW')
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def mount_string(self):
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if self.type == VOLUME_TYPE_VOLUME:
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return "- {}:{}:ro".format(self.name.split('_')[-1], self.destination)
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elif self.type == VOLUME_TYPE_BIND:
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return "- {}:{}:ro".format(self.source, self.destination)
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else:
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raise ValueError("Uknown volume type: {}".format(self.type))
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def __repr__(self):
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return str(self)
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def __str__(self):
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return str(self.data)
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def __hash__(self):
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"""Uniquness for a volume"""
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if self.type == VOLUME_TYPE_VOLUME:
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return hash(self.name)
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elif self.type == VOLUME_TYPE_BIND:
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return hash(self.source)
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else:
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raise ValueError("Uknown volume type: {}".format(self.type))
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class RunningContainers:
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def __init__(self):
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client = docker.Client(base_url=DOCKER_BASE_URL)
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all_containers = client.containers()
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client.close()
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self.containers = []
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self.backup_container = None
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for entry in all_containers:
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if entry['Id'].startswith(os.environ['HOSTNAME']):
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self.backup_container = Container(entry)
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else:
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if entry['State'] == "running":
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self.containers.append(Container(entry))
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if not self.backup_container:
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raise ValueError("Cannot find metadata for backup container")
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def backup_volumes(self):
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return self.backup_container.mounts
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def gen_volumes(self, volume_type):
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"""Generator yielding volumes of a specific type"""
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for cont in self.containers:
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for mnt in cont.mounts:
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if mnt.type == volume_type:
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yield mnt
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def volume_mounts(self):
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"""Docker volumes"""
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return set(mnt for mnt in self.gen_volumes(VOLUME_TYPE_VOLUME))
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def bind_mounts(self):
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"""Host mapped volumes"""
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return set(mnt for mnt in self.gen_volumes(VOLUME_TYPE_BIND))
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def print_all(self):
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print("Backup container:")
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print(json.dumps(self.backup_container.to_dict(), indent=2))
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print("All containers:")
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print(json.dumps([cnt.to_dict() for cnt in self.containers], indent=2))
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