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authorBen Pilgrim <ben@pilgrim.me.uk>2024-04-09 20:05:14 +0100
committerNicolas Vollmar <nvo@scaling.ch>2024-06-10 10:32:19 +0200
commit717ea64e4c54a8be619ffc29c16c6203b29319dd (patch)
tree3c9dcb20e588617329d4300769f30bb831d0d425 /src/conf_mode/container.py
parent82607438d6df5291c581d802c7a2a98eabe084ff (diff)
downloadvyos-1x-717ea64e4c54a8be619ffc29c16c6203b29319dd.tar.gz
vyos-1x-717ea64e4c54a8be619ffc29c16c6203b29319dd.zip
container: T6219: Add support for container sysctl / kernel parameters
Diffstat (limited to 'src/conf_mode/container.py')
-rwxr-xr-xsrc/conf_mode/container.py53
1 files changed, 38 insertions, 15 deletions
diff --git a/src/conf_mode/container.py b/src/conf_mode/container.py
index 3efeb9b40..8757c5eab 100755
--- a/src/conf_mode/container.py
+++ b/src/conf_mode/container.py
@@ -43,6 +43,7 @@ from vyos.template import render
from vyos.xml_ref import default_value
from vyos import ConfigError
from vyos import airbag
+
airbag.enable()
config_containers = '/etc/containers/containers.conf'
@@ -50,16 +51,19 @@ config_registry = '/etc/containers/registries.conf'
config_storage = '/etc/containers/storage.conf'
systemd_unit_path = '/run/systemd/system'
+
def _cmd(command):
if os.path.exists('/tmp/vyos.container.debug'):
print(command)
return cmd(command)
+
def network_exists(name):
# 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):
if config:
@@ -86,21 +90,22 @@ def get_config(config=None):
# registry is a tagNode with default values - merge the list from
# default_values['registry'] into the tagNode variables
if 'registry' not in container:
- container.update({'registry' : {}})
+ container.update({'registry': {}})
default_values = default_value(base + ['registry'])
for registry in default_values:
- tmp = {registry : {}}
+ tmp = {registry: {}}
container['registry'] = dict_merge(tmp, container['registry'])
# Delete container network, delete containers
tmp = node_changed(conf, base + ['network'])
- if tmp: container.update({'network_remove' : tmp})
+ if tmp: container.update({'network_remove': tmp})
tmp = node_changed(conf, base + ['name'])
- if tmp: container.update({'container_remove' : tmp})
+ if tmp: container.update({'container_remove': tmp})
return container
+
def verify(container):
# bail out early - looks like removal from running config
if not container:
@@ -125,8 +130,8 @@ def verify(container):
# of image upgrade and deletion.
image = container_config['image']
if run(f'podman image exists {image}') != 0:
- Warning(f'Image "{image}" used in container "{name}" does not exist '\
- f'locally. Please use "add container image {image}" to add it '\
+ Warning(f'Image "{image}" used in container "{name}" does not exist ' \
+ f'locally. Please use "add container image {image}" to add it ' \
f'to the system! Container "{name}" will not be started!')
if 'cpu_quota' in container_config:
@@ -167,11 +172,11 @@ def verify(container):
# We can not use the first IP address of a network prefix as this is used by podman
if ip_address(address) == ip_network(network)[1]:
- raise ConfigError(f'IP address "{address}" can not be used for a container, '\
+ raise ConfigError(f'IP address "{address}" can not be used for a container, ' \
'reserved for the container engine!')
if cnt_ipv4 > 1 or cnt_ipv6 > 1:
- raise ConfigError(f'Only one IP address per address family can be used for '\
+ raise ConfigError(f'Only one IP address per address family can be used for ' \
f'container "{name}". {cnt_ipv4} IPv4 and {cnt_ipv6} IPv6 address(es)!')
if 'device' in container_config:
@@ -186,6 +191,11 @@ def verify(container):
if not os.path.exists(source):
raise ConfigError(f'Device "{dev}" source path "{source}" does not exist!')
+ if 'kernel-parameter' in container_config:
+ for var, cfg in container_config['kernel-parameter'].items():
+ if 'value' not in cfg:
+ raise ConfigError(f'Kernel parameter {var} has no value assigned!')
+
if 'environment' in container_config:
for var, cfg in container_config['environment'].items():
if 'value' not in cfg:
@@ -219,7 +229,8 @@ def verify(container):
# 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!')
+ raise ConfigError(
+ f'"allow-host-networks" and "network" for "{name}" cannot be both configured at the same time!')
# gid cannot be set without uid
if 'gid' in container_config and 'uid' not in container_config:
@@ -235,8 +246,10 @@ def verify(container):
raise ConfigError(f'prefix for network "{network}" must be defined!')
for prefix in network_config['prefix']:
- if is_ipv4(prefix): v4_prefix += 1
- elif is_ipv6(prefix): v6_prefix += 1
+ 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}"!')
@@ -262,6 +275,7 @@ def verify(container):
return None
+
def generate_run_arguments(name, container_config):
image = container_config['image']
cpu_quota = container_config['cpu_quota']
@@ -269,6 +283,12 @@ def generate_run_arguments(name, container_config):
shared_memory = container_config['shared_memory']
restart = container_config['restart']
+ # Add sysctl options
+ sysctl_opt = ''
+ if 'kernel-parameter' in container_config:
+ for k, v in container_config['kernel-parameter'].items():
+ sysctl_opt += f" --sysctl={k}={v['value']}"
+
# Add capability options. Should be in uppercase
capabilities = ''
if 'capability' in container_config:
@@ -341,7 +361,7 @@ def generate_run_arguments(name, container_config):
if 'allow_host_pid' in container_config:
host_pid = '--pid host'
- container_base_cmd = f'--detach --interactive --tty --replace {capabilities} --cpus {cpu_quota} ' \
+ container_base_cmd = f'--detach --interactive --tty --replace {capabilities} --cpus {cpu_quota} {sysctl_opt} ' \
f'--memory {memory}m --shm-size {shared_memory}m --memory-swap 0 --restart {restart} ' \
f'--name {name} {hostname} {device} {port} {volume} {env_opt} {label} {uid} {host_pid}'
@@ -375,6 +395,7 @@ def generate_run_arguments(name, container_config):
return f'{container_base_cmd} --no-healthcheck --net {networks} {ip_param} {entrypoint} {image} {command} {command_arguments}'.strip()
+
def generate(container):
# bail out early - looks like removal from running config
if not container:
@@ -387,7 +408,7 @@ def generate(container):
for network, network_config in container['network'].items():
tmp = {
'name': network,
- 'id' : sha256(f'{network}'.encode()).hexdigest(),
+ 'id': sha256(f'{network}'.encode()).hexdigest(),
'driver': 'bridge',
'network_interface': f'pod-{network}',
'subnets': [],
@@ -399,7 +420,7 @@ def generate(container):
}
}
for prefix in network_config['prefix']:
- net = {'subnet' : prefix, 'gateway' : inc_ip(prefix, 1)}
+ net = {'subnet': prefix, 'gateway': inc_ip(prefix, 1)}
tmp['subnets'].append(net)
if is_ipv6(prefix):
@@ -418,11 +439,12 @@ def generate(container):
file_path = os.path.join(systemd_unit_path, f'vyos-container-{name}.service')
run_args = generate_run_arguments(name, container_config)
- render(file_path, 'container/systemd-unit.j2', {'name': name, 'run_args': run_args,},
+ render(file_path, 'container/systemd-unit.j2', {'name': name, 'run_args': run_args, },
formater=lambda _: _.replace("&quot;", '"').replace("&apos;", "'"))
return None
+
def apply(container):
# Delete old containers if needed. We can't delete running container
# Option "--force" allows to delete containers with any status
@@ -485,6 +507,7 @@ def apply(container):
return None
+
if __name__ == '__main__':
try:
c = get_config()