When powering off the system, we want the ocid service, to shutdown
all containers running on the system so they can cleanup properly
This patch will cleanup all pods on poweroff.
The ocid-shutdown.service drops a file /var/run/ocid.shutdown when the system
is shutting down. The ocid-shutdown.service should only be executed at system
shutdown.
On bootup sequence should be
start ocid.service
start ocid-shutdown.service (This is a NO-OP)
On system shutdown
stop ocid-shutdown.service (Creates /var/run/ocid.shutdown)
stop ocid.service (Notices /var/run/ocid.service and stops all pods before exiting.)
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
This adds a very simple implementation of logging within conmon, where
every buffer read from the masterfd of the container is also written to
the log file (with errors during writing to the log file ignored).
Signed-off-by: Aleksa Sarai <asarai@suse.de>
Interleaving asynchronous updates with pod or container creations can
lead to unrecoverable races and corruptions of the pod or container hash
tables. This is fixed by serializing update against pod or container
creation operations, while pod and container creation operations can
run in parallel.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
When we get a pod with DNS settings, we need to build
a resolv.conf file and mount it in all pod containers.
In order to do that, we have to track the built resolv.conf
file and store/load it.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
We have moved selinux support out of opencontainers/runc into its
own package. This patch moves to using the new selinux go bindings.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
The sandbox privileged flag is set to true only if either the
pod configuration privileged flag is set to true or when any
of the pod namespaces are the host ones.
A container inherit its privileged flag from its sandbox, and
will be run by the privileged runtime only if it's set to true.
In other words, the privileged runtime (when defined) will be
when one of the below conditions is true:
- The sandbox will be asked to run at least one privileged container.
- The sandbox requires access to either the host IPC or networking
namespaces.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
We add a privileged flag to the container and sandbox structures
and can now select the appropriate runtime path for any container
operations depending on that flag.
Here again, the default runtime will be used for non privileged
containers and for privileged ones in case there are no privileged
runtime defined.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Previously ocicni did not have support for setting the plugin directory.
Now that it has grown support for it, use it to actually respect the
setting a user has provided for ocid.network.* options.
Signed-off-by: Aleksa Sarai <asarai@suse.de>
The CRI doesn't expect us to implicitly pull an image if it isn't
already present before we're asked to use it to create a container, and
the tests no longer depend on us doing so, either.
Limit the logic which attempts to pull an image, if it isn't present, to
only pulling the configured "pause" image, since our use of that image
for running pod sandboxes is an implementation detail that our clients
can't be expected to know or care about. Include the name of the image
that we didn't pull in the error we return when we don't pull one.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
Use containers/storage to store images, pod sandboxes, and containers.
A pod sandbox's infrastructure container has the same ID as the pod to
which it belongs, and all containers also keep track of their pod's ID.
The container configuration that we build using the data in a
CreateContainerRequest is stored in the container's ContainerDirectory
and ContainerRunDirectory.
We catch SIGTERM and SIGINT, and when we receive either, we gracefully
exit the grpc loop. If we also think that there aren't any container
filesystems in use, we attempt to do a clean shutdown of the storage
driver.
The test harness now waits for ocid to exit before attempting to delete
the storage root directory.
Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
We add 2 ocid options for choosing the CNI configuration and plugin
binaries directories: --cni-config-dir and --cni-plugin-dir.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
In order to workaround a bug introduced with runc commit bc84f833,
we create a symbolic link to our permanent networking namespace so
that runC realizes that this is not the host namespace.
Although this bug is now fixed upstream (See commit f33de5ab4), this
patch works with pre rc3 runC versions.
We may want to revert that patch once runC 1.0.0 is released.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Because they need to prepare the hypervisor networking interfaces
and have them match the ones created in the pod networking
namespace (typically to bridge TAP and veth interfaces), hypervisor
based container runtimes need the sandbox pod networking namespace
to be set up before it's created. They can then prepare and start
the hypervisor interfaces when creating the pod virtual machine.
In order to do so, we need to create per pod persitent networking
namespaces that we pass to the CNI plugin. This patch leverages
the CNI ns package to create such namespaces under /var/run/netns,
and assign them to all pod containers.
The persitent namespace is removed when either the pod is stopped
or removed.
Since the StopPodSandbox() API can be called multiple times from
kubelet, we track the pod networking namespace state (closed or
not) so that we don't get a containernetworking/ns package error
when calling its Close() routine multiple times as well.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
It's a bit odd to have ImageStore be part of the config and yet we don't
allow people to modify it. However, leave it out of the commented
version because it's currently unused.
Signed-off-by: Aleksa Sarai <asarai@suse.de>
infra container is used to implement the pod
sandbox, it should not be exported to user.
this patch stores infra container in sandbox
immediately, only the containers created by user
are stored into container store, this prevents user
from removing/stopping infra container incorrectly.
Signed-off-by: Gao feng <omarapazanadi@gmail.com>
This paves the way for having a configuration file that is loaded rather
than everything being set via the command-line.
Signed-off-by: Aleksa Sarai <asarai@suse.de>
This lessens the Docker requirement for creating sandboxes (with the
requirement only existing for the actual image pulling that is done when
adding a container to a pod). The interface was chosen to match the
--conmon interface, so that the location of the pause binary can be
chosen by a user.
Signed-off-by: Aleksa Sarai <asarai@suse.de>
