When sharing a network namespace, containers should also share
resolv.conf and /etc/hosts in case a container process made
changes to either (for example, if I set up a VPN client in
container A and join container B to its network namespace, I
expect container B to use the DNS servers from A to ensure it can
see everything on the VPN).
Resolves: #1546
Signed-off-by: Matthew Heon <mheon@redhat.com>
containers inside pods need to make sure they get /etc/resolv.conf
and /etc/hosts bind mounted when network is expected
Signed-off-by: baude <bbaude@redhat.com>
Whe running unittests on newer golang versions, we observe failures with some
formatting types when no declared correctly.
Signed-off-by: baude <bbaude@redhat.com>
/etc/resolv.conf and /etc/hosts should not be created and mounted when the
network is disabled.
We should not be calling the network setup and cleanup functions when it is
disabled either.
In doing this patch, I found that all of the bind mounts were particular to
Linux along with the generate functions, so I moved them to
container_internal_linux.go
Since we are checking if we are using a network namespace, we need to check
after the network namespaces has been created in the spec.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
We are still requiring oci-systemd-hook to be installed in order to run
systemd within a container. This patch properly mounts
/sys/fs/cgroup/systemd/libpod_parent/libpod-UUID on /sys/fs/cgroup/systemd inside of container.
Since we need the UUID of the container, we needed to move Systemd to be a config option of the
container.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
If someone runs podman as a user (uid) that is not defined in the container
we want generate a passwd file so that getpwuid() will work inside of container.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
To work better with Kata containers, we need to delete() from the
OCI runtime as a part of cleanup, to ensure resources aren't
retained longer than they need to be.
To enable this, we need to add a new state to containers,
ContainerStateExited. Containers transition from
ContainerStateStopped to ContainerStateExited via cleanupRuntime
which is invoked as part of cleanup(). A container in the Exited
state is identical to Stopped, except it has been removed from
the OCI runtime and thus will be handled differently when
initializing the container.
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
We added a timeout for convenience, but most invocations don't
care about it. Refactor it into WaitWithTimeout() and add a
Wait() that doesn't require a timeout and uses the default.
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Closes: #1527
Approved by: mheon
We don't want to allow users to write to /etc/resolv.conf or /etc/hosts if in read
only mode.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Closes: #1510
Approved by: TomSweeneyRedHat
Waiting uses a lot of CPU, so drop back to checking once/second
and allow user to pass in the interval.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
FFJSON has serialization differences versus stock Go - namely, it
does not respect the MarshalText() and UnmarshalText() methods,
particularly on []byte, which causes incompatability with
pre-FFJSON containers which contained DNS servers.
EasyJSON does not have these issues, and might even be slightly
faster.
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Closes: #1322
Approved by: mheon
As well as small style corrections, update pod_top_test to use CreatePod, and move handling of adding a container to the pod's namespace from container_internal_linux to libpod/option.
Signed-off-by: haircommander <pehunt@redhat.com>
Closes: #1187
Approved by: mheon
A pause container is added to the pod if the user opts in. The default pause image and command can be overridden. Pause containers are ignored in ps unless the -a option is present. Pod inspect and pod ps show shared namespaces and pause container. A pause container can't be removed with podman rm, and a pod can be removed if it only has a pause container.
Signed-off-by: haircommander <pehunt@redhat.com>
Closes: #1187
Approved by: mheon
The new state changes are potentially confusing to people writing
API functions on containers or pods. Add comments to the structs
on how to safely use them.
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Closes: #1186
Approved by: rhatdan
Addresses a regression in `podman mount` due to our mount changes
to allow concurrency by letting c/storage handle mounting and
unmounting.
Combine Mounted() and Mountpoint() into one function and query
c/storage directly to ensure we get accurate information.
Fixes: #1143
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Closes: #1144
Approved by: baude
Use this to supplement exit codes returned from containers, to
make sure we know when exit codes are invalid (as the container
has not yet exited)
Signed-off-by: Matthew Heon <mheon@redhat.com>
This is a refresh of Dan William's PR #974 with a rebase and proper
vendoring of ocicni and containernetworking/cni. It adds the ability
to define multiple networks as so:
podman run --network=net1,net2,foobar ...
Signed-off-by: baude <bbaude@redhat.com>
Closes: #1082
Approved by: baude
podman now supports --volumes-from flag, which allows users
to add all the volumes an existing container has to a new one.
Signed-off-by: umohnani8 <umohnani@redhat.com>
Closes: #931
Approved by: mheon
Originally, it seemed like a good idea to place Conmon and the
container it managed under a shared CGroup, so we could manage
the two together. It's become increasingly clear that this is a
potential performance sore point, gains us little practical
benefit in managing Conmon, and adds extra steps to container
cleanup that interfere with Conmon postrun hooks.
Revert back to a shared CGroup for conmon processes under the
CGroup parent. This will retain per-pod conmon CGroups as well if
the pod is set to create a CGroup and act as CGroup parent for
its containers.
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Closes: #1051
Approved by: umohnani8
When we run containers in detach mode, nothing cleans up the network stack or
the mount points. This patch will tell conmon to execute the cleanup code when
the container exits.
It can also be called to attempt to cleanup previously running containers.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Closes: #942
Approved by: mheon
the error was:
libpod/container.go:219::error: struct field tag `json:"groups, omitempty"` not compatible with reflect.StructTag.Get: suspicious space in struct tag value (vet)
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Closes: #729
Approved by: baude
so that the OCI runtime creates the network namespace from the correct
userNS.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Closes: #690
Approved by: mheon
We need these for commit, and they cannot be properly deduced
from just the OCI spec, so save them in the database so we can
retrieve them for commit.
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Closes: #700
Approved by: rhatdan
This allows us to accurately trigger OCI hooks that trigger on
the presence of volume mounts.
Signed-off-by: Matthew Heon <matthew.heon@gmail.com>
Closes: #700
Approved by: rhatdan
--group-add
--blkio-weight-device
--device-read-bps
--device-write-bps
--device-read-iops
--device-write-iops
--group-add now supports group names as well as the gid associated with them.
All the --device flags work now with moderate changes to the code to support both
bps and iops.
Added tests for all the flags.
Signed-off-by: umohnani8 <umohnani@redhat.com>
Closes: #590
Approved by: mheon
so that it is possible to use systemd to automatically restart the
container:
[Service]
Type=forking
PIDFile=/run/awesome-service.pid
ExecStart=/usr/bin/podman run --conmon-pidfile=/run/awesome-service.pid --name awesome -d IMAGE /usr/bin/do-something
ExecStopPost=/usr/bin/podman rm awesome
Restart=always
Closes: https://github.com/projectatomic/libpod/issues/534
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Closes: #549
Approved by: rhatdan
