diff options
Diffstat (limited to 'src/conf_mode/containers.py')
| -rwxr-xr-x | src/conf_mode/containers.py | 215 |
1 files changed, 102 insertions, 113 deletions
diff --git a/src/conf_mode/containers.py b/src/conf_mode/containers.py index e2fa5bd44..3d5795016 100755 --- a/src/conf_mode/containers.py +++ b/src/conf_mode/containers.py @@ -15,65 +15,53 @@ # along with this program. If not, see <http://www.gnu.org/licenses/>. import os +import json from vyos.config import Config from vyos.configdict import dict_merge from vyos.configdict import node_changed -from vyos.configdict import leaf_node_changed -from vyos import ConfigError -from vyos.util import cmd, process_named_running +from vyos.util import cmd +from vyos.util import popen from vyos.template import render +from vyos.template import is_ipv4 +from vyos.template import is_ipv6 from vyos.xml import defaults +from vyos import ConfigError from vyos import airbag -import json airbag.enable() config_containers_registry = '/etc/containers/registries.conf' config_containers_storage = '/etc/containers/storage.conf' +def _cmd(command): + if os.path.exists('/tmp/vyos.container.debug'): + print(command) + return cmd(command) + # Container management functions def container_exists(name): ''' - https://docs.podman.io/en/latest/_static/api.html#operation/ContainerExistsLibpod - Check if container exists. Response codes. - 204 - container exists - 404 - no such container + https://docs.podman.io/en/latest/_static/api.html#operation/ContainerExistsLibpod + Check if container exists. Response codes. + 204 - container exists + 404 - no such container ''' - c = cmd(f"curl --unix-socket /run/podman/podman.sock 'http://d/v3.0.0/libpod/containers/{name}/exists'") - # If container exists it return status code "0" - # This code not displayed - if c == "": - # Container exists - return True - else: - # Container not exists - return False + tmp = _cmd(f"curl --unix-socket /run/podman/podman.sock 'http://d/v3.0.0/libpod/containers/{name}/exists'") + # If container exists it return status code "0" - code can not be displayed + return (tmp == "") def container_status(name): ''' - https://docs.podman.io/en/latest/_static/api.html#operation/ContainerInspectLibpod + https://docs.podman.io/en/latest/_static/api.html#operation/ContainerInspectLibpod ''' - c = cmd(f"curl --unix-socket /run/podman/podman.sock 'http://d/v3.0.0/libpod/containers/{name}/json'") - data = json.loads(c) - status = data['State']['Status'] - - return status - -def container_stop(name): - c = cmd(f'podman stop {name}') - -def container_start(name): - c = cmd(f'podman start {name}') + tmp = _cmd(f"curl --unix-socket /run/podman/podman.sock 'http://d/v3.0.0/libpod/containers/{name}/json'") + data = json.loads(tmp) + return data['State']['Status'] def ctnr_network_exists(name): - # Check explicit name for network. - c = cmd(f'podman network ls --quiet --filter name=^{name}$') - # If network name is found, return true - if bool(c) == True: - return True - else: - return False - + # Check explicit name for network, returns True if network exists + c = _cmd(f'podman network ls --quiet --filter name=^{name}$') + return bool(c) # Common functions def get_config(config=None): @@ -81,27 +69,21 @@ def get_config(config=None): conf = config else: conf = Config() + base = ['container'] - container = conf.get_config_dict(base, get_first_key=True) + container = conf.get_config_dict(base, key_mangling=('-', '_'), + get_first_key=True) # We have gathered the dict representation of the CLI, but there are default # options which we need to update into the dictionary retrived. default_values = defaults(base) container = dict_merge(default_values, container) - if 'name' in container or 'network' in container: - container['configured'] = True - # Delete container network, delete containers - dict = {} - tmp_net = node_changed(conf, ['container', 'network']) - if tmp_net: - dict = dict_merge({'net_remove' : tmp_net}, dict) - container.update(dict) + tmp = node_changed(conf, ['container', 'network']) + if tmp: container.update({'net_remove' : tmp}) - tmp_name = node_changed(conf, ['container', 'name']) - if tmp_name: - dict = dict_merge({'container_remove' : tmp_name}, dict) - container.update(dict) + tmp = node_changed(conf, ['container', 'name']) + if tmp: container.update({'container_remove' : tmp}) return container @@ -112,40 +94,53 @@ def verify(container): # Add new container if 'name' in container: - for cont, container_config in container['name'].items(): - # Dont add container with wrong/undefined name network - if 'network' in container_config and 'network' in container: - if list(container_config['network'])[0] not in container['network']: - # Don't allow delete network if container use this network. - raise ConfigError('Netowrk with name: {0} shuld be specified!'.format(list(container_config['network'])[0])) - - # If image not defined + for name, container_config in container['name'].items(): + if 'network' in container_config: + if len(container_config['network']) > 1: + raise ConfigError(f'Only one network can be specified for container "{name}"!') + + # Check if the specified container network exists + network_name = list(container_config['network'])[0] + if network_name not in container_config['network']: + raise ConfigError('Container network "{network_name}" does not exist!') + + # Container image is a mandatory option if 'image' not in container_config: - raise ConfigError(f'Image for container "{cont}" is required!') + raise ConfigError(f'Container image for "{name}" is mandatory!') # If 'allow-host-networks' or 'network' not set. - if 'allow-host-networks' not in container_config and 'network' not in container_config: - raise ConfigError(f'"Network" or "allow-host-networks" for container "{cont}" is required!') + if 'allow_host_networks' not in container_config and 'network' not in container_config: + raise ConfigError(f'Must either set "network" or "allow-host-networks" for container "{name}"!') - # If set both parameters for networks (host and user-defined). We require only one. - if 'allow-host-networks' in container_config and 'network' in container_config: - raise ConfigError(f'"allow-host-networks" and "network" for "{cont}" cannot be both configured at the same time!') + # Can not set both allow-host-networks and network at the same time + if {'allow_host_networks', 'network'} <= set(container_config): + raise ConfigError(f'"allow-host-networks" and "network" for "{name}" cannot be both configured at the same time!') # Add new network if 'network' in container: - for net in container['network']: + v4_prefix = 0 + v6_prefix = 0 + for network, network_config in container['network'].items(): # If ipv4-prefix not defined for user-defined network - if 'ipv4-prefix' not in container['network'][net]: - raise ConfigError(f'IPv4 prefix for network "{net}" is required!') + if 'prefix' not in network_config: + raise ConfigError(f'prefix for network "{net}" must be defined!') - # Don't allow to remove network which used for container - if 'net_remove' in container: - for net in container['net_remove']: - if 'name' in container: - for cont in container['name']: - if 'network' in container['name'][cont]: - if net in container['name'][cont]['network']: - raise ConfigError(f'Can\'t remove network "{net}" used for "{cont}"') + for prefix in network_config['prefix']: + if is_ipv4(prefix): v4_prefix += 1 + elif is_ipv6(prefix): v6_prefix += 1 + + if v4_prefix > 1: + raise ConfigError(f'Only one IPv4 prefix can be defined for network "{network}"!') + if v6_prefix > 1: + raise ConfigError(f'Only one IPv6 prefix can be defined for network "{network}"!') + + + # A network attached to a container can not be deleted + if {'net_remove', 'name'} <= set(container): + for network in container['net_remove']: + for container, container_config in container['name'].items(): + if 'network' in container_config and network in container_config['network']: + raise ConfigError(f'Can not remove network "{network}", used by container "{container}"!') return None @@ -165,63 +160,57 @@ def apply(container): if 'container_remove' in container: for name in container['container_remove']: if container_status(name) == 'running': - cmd(f'podman stop {name}') - cmd(f'podman rm --force {name}') - print(f'Container "{name}" deleted') + _cmd(f'podman stop {name}') + _cmd(f'podman rm --force {name}') # Delete old networks if needed if 'net_remove' in container: - for net in container['net_remove']: - cmd(f'podman network rm {net}') + for network in container['net_remove']: + _cmd(f'podman network rm {network}') # Add network if 'network' in container: - for net in container['network']: + for network, network_config in container['network'].items(): # Check if the network has already been created - if ctnr_network_exists(net) is False: - prefix = container['network'][net]['ipv4-prefix'] - if container['network'][net]['ipv4-prefix']: - # Create user-defined network - try: - cmd(f'podman network create {net} --subnet={prefix}') - except: - print(f'Can\'t add network {net}') + if not ctnr_network_exists(network) and 'prefix' in network_config: + tmp = f'podman network create {network}' + # we can not use list comprehension here as the --ipv6 option + # must immediately follow the specified subnet!!! + for prefix in sorted(network_config['prefix']): + tmp += f' --subnet={prefix}' + if is_ipv6(prefix): + tmp += ' --ipv6' + _cmd(tmp) # Add container if 'name' in container: - for name in container['name']: + for name, container_config in container['name'].items(): # Check if the container has already been created - #if len(cmd(f'podman ps -a --filter "name=^{name}$" -q')) == 0: - if container_exists(name) is False: - image = container['name'][name]['image'] + if not container_exists(name): + image = container_config['image'] + # Currently the best way to run a command and immediately print stdout + print(os.system(f'podman pull {image}')) # Check/set environment options "-e foo=bar" env_opt = '' - if 'environment' in container['name'][name]: + if 'environment' in container_config: env_opt = '-e ' - env_opt += " -e ".join(f"{k}={v['value']}" for k, v in container['name'][name]['environment'].items()) - - if 'allow-host-networks' in container['name'][name]: - try: - cmd(f'podman run -dit --name {name} --net host {env_opt} {image}') - except: - print(f'Can\'t add container {name}') + env_opt += " -e ".join(f"{k}={v['value']}" for k, v in container_config['environment'].items()) + if 'allow_host_networks' in container_config: + _cmd(f'podman run -dit --name {name} --net host {env_opt} {image}') else: - for net in container['name'][name]['network']: - if container['name'][name]['image']: - ipparam = '' - if 'address' in container['name'][name]['network'][net]: - ipparam = '--ip {}'.format(container['name'][name]['network'][net]['address']) - try: - cmd(f'podman run --name {name} -dit --net {net} {ipparam} {env_opt} {image}') - except: - print(f'Can\'t add container {name}') + for network in container_config['network']: + ipparam = '' + if 'address' in container_config['network'][network]: + ipparam = '--ip ' + container_config['network'][network]['address'] + _cmd(f'podman run --name {name} -dit --net {network} {ipparam} {env_opt} {image}') + # Else container is already created. Just start it. # It's needed after reboot. - else: - if container_status(name) != 'running': - container_start(name) + elif container_status(name) != 'running': + _cmd(f'podman start {name}') + return None if __name__ == '__main__': |