diff options
| -rw-r--r-- | interface-definitions/container.xml.in | 18 | ||||
| -rwxr-xr-x | smoketest/scripts/cli/test_container.py | 16 | ||||
| -rwxr-xr-x | src/conf_mode/container.py | 9 |
3 files changed, 42 insertions, 1 deletions
diff --git a/interface-definitions/container.xml.in b/interface-definitions/container.xml.in index 2296a3e9e..4370f5888 100644 --- a/interface-definitions/container.xml.in +++ b/interface-definitions/container.xml.in @@ -192,6 +192,24 @@ </leafNode> </children> </tagNode> + <leafNode name="cpus"> + <properties> + <help>This limits the number of CPU resources the container can use</help> + <valueHelp> + <format>u32:0</format> + <description>Unlimited</description> + </valueHelp> + <valueHelp> + <format>txt</format> + <description>Amount of CPU time the container can use in amount of cores (up to three decimals)</description> + </valueHelp> + <constraint> + <regex>(0|[1-9]\d*)(\.\d{1,3})?</regex> + </constraint> + <constraintErrorMessage>Container CPU limit must be a (decimal) number in range 0 to number of threads</constraintErrorMessage> + </properties> + <defaultValue>0</defaultValue> + </leafNode> <leafNode name="memory"> <properties> <help>Memory (RAM) available to this container</help> diff --git a/smoketest/scripts/cli/test_container.py b/smoketest/scripts/cli/test_container.py index 3201883b8..ef31d0f6f 100755 --- a/smoketest/scripts/cli/test_container.py +++ b/smoketest/scripts/cli/test_container.py @@ -91,6 +91,22 @@ class TestContainer(VyOSUnitTestSHIM.TestCase): # Check for running process self.assertEqual(process_named_running(PROCESS_NAME), pid) + def test_cpu_limit(self): + cont_name = 'c2' + + self.cli_set(base_path + ['name', cont_name, 'allow-host-networks']) + self.cli_set(base_path + ['name', cont_name, 'image', cont_image]) + self.cli_set(base_path + ['name', cont_name, 'cpus', '1.25']) + + self.cli_commit() + + pid = 0 + with open(PROCESS_PIDFILE.format(cont_name), 'r') as f: + pid = int(f.read()) + + # Check for running process + self.assertEqual(process_named_running(PROCESS_NAME), pid) + def test_ipv4_network(self): prefix = '192.0.2.0/24' base_name = 'ipv4' diff --git a/src/conf_mode/container.py b/src/conf_mode/container.py index 91a10e891..2294b8e57 100755 --- a/src/conf_mode/container.py +++ b/src/conf_mode/container.py @@ -16,6 +16,7 @@ import os +from decimal import Decimal from hashlib import sha256 from ipaddress import ip_address from ipaddress import ip_network @@ -127,6 +128,11 @@ def verify(container): f'locally. Please use "add container image {image}" to add it '\ f'to the system! Container "{name}" will not be started!') + if 'cpus' in container_config: + cores = os.cpu_count() + if Decimal(container_config['cpus']) > cores: + raise ConfigError(f'Cannot set limit to more cores than available "{name}"!') + if 'network' in container_config: if len(container_config['network']) > 1: raise ConfigError(f'Only one network can be specified for container "{name}"!') @@ -257,6 +263,7 @@ def verify(container): def generate_run_arguments(name, container_config): image = container_config['image'] + cpus = container_config['cpus'] memory = container_config['memory'] shared_memory = container_config['shared_memory'] restart = container_config['restart'] @@ -333,7 +340,7 @@ 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} ' \ + container_base_cmd = f'--detach --interactive --tty --replace {capabilities} --cpus {cpus} ' \ 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}' |