"""
Basic datasources for container specs
"""
from insights.core.context import HostContext
from insights.core.exceptions import SkipComponent
from insights.core.plugins import datasource
from insights.parsers.docker_list import DockerListContainers
from insights.parsers.podman_list import PodmanListContainers
from insights.specs.datasources import DEFAULT_SHELL_TIMEOUT
[docs]
@datasource([PodmanListContainers, DockerListContainers], HostContext, timeout=240)
def running_rhel_containers(broker):
"""
Returns a list of tuple of (image, <podman|docker>, container_id) of the running
containers.
From RHEL 8, the "docker" command is from the package "podman-docker". In
general when using command "docker" to access a container, the following
message will be reported on the top::
Emulate Docker CLI using podman. Create /etc/containers/nodocker to quiet msg.
But sometimes, this line won't be outputted as expected, in this case, it's
necessary to remove the duplicated containers from the output of "docker".
"""
def _is_rhel_image(ctx, c_info):
"""Only collect the containers based from RHEL images"""
try:
ret = ctx.shell_out("/usr/bin/%s exec %s cat /etc/redhat-release" % c_info, timeout=DEFAULT_SHELL_TIMEOUT)
if ret and len(ret) == 1 and "red hat enterprise linux" in ret[0].lower():
return True
except Exception:
# return False when there is no such file "/etc/redhat-releas"
pass
return False
cs = []
podman_container = set()
if (PodmanListContainers in broker):
podman_c = broker[PodmanListContainers]
for name in podman_c.running_containers:
container_id = podman_c.containers[name]['CONTAINER ID']
podman_container.add(container_id)
c_info = ('podman', container_id[:12])
if not _is_rhel_image(broker[HostContext], c_info):
# skip containers from non-rhel image
continue
cs.append((podman_c.containers[name]['IMAGE'],) + c_info)
if (DockerListContainers in broker):
docker_c = broker[DockerListContainers]
for name in docker_c.running_containers:
container_id = docker_c.containers[name]['CONTAINER ID']
c_info = ('docker', container_id[:12])
if (container_id in podman_container or
not _is_rhel_image(broker[HostContext], c_info)):
# skip containers from non-rhel image and
# skip duplicated containers managed by "podman"
continue
cs.append((docker_c.containers[name]['IMAGE'],) + c_info)
if cs:
# Return list of tuple:
# - (image, <podman|docker>, container_id)
return cs
raise SkipComponent