For example:
$ cat /etc/containers/oci/hooks.d/test.json
{
"version": "1.0.0",
"hook": {
"path": "/bin/sh",
"args": ["sh", "-c", "echo 'oh, noes!' >&2; exit 1"]
},
"when": {
"always": true
},
"stages": ["precreate"]
}
$ podman run --rm docker.io/library/alpine echo 'successful container'
error setting up OCI Hooks: executing [sh -c echo 'oh, noes!' >&2; exit 1]: exit status 1
The rendered command isn't in in the right syntax for copy/pasting
into a shell, but it should be enough for the user to be able to
locate the failing hook. They'll need to know their hook directories,
but with the previous commits requiring explicit hook directories it's
more likely that the caller is aware of them. And if they run at a
debug level, they can see the lookups in the logs:
$ podman --log-level=debug --hooks-dir=/etc/containers/oci/hooks.d run --rm docker.io/library/alpine echo 'successful container' 2>&1 | grep -i hook
time="2018-12-02T22:15:16-08:00" level=debug msg="reading hooks from /etc/containers/oci/hooks.d"
time="2018-12-02T22:15:16-08:00" level=debug msg="added hook /etc/containers/oci/hooks.d/test.json"
time="2018-12-02T22:15:16-08:00" level=debug msg="hook test.json matched; adding to stages [precreate]"
time="2018-12-02T22:15:16-08:00" level=warning msg="container 3695c6ba0cc961918bd3e4a769c52bd08b82afea5cd79e9749e9c7a63b5e7100: precreate hook: executing [sh -c echo 'oh, noes!' >&2; exit 1]: exit status 1"
time="2018-12-02T22:15:16-08:00" level=error msg="error setting up OCI Hooks: executing [sh -c echo 'oh, noes!' >&2; exit 1]: exit status 1"
Signed-off-by: W. Trevor King <wking@tremily.us>
To make it easier to notice and track down errors (or other surprising
behavior) due to precreate hooks. With this commit, the logged
messages look like:
time="2018-11-19T13:35:18-08:00" level=debug msg="precreate hook 0 made configuration changes:
--- Old
+++ New
@@ -18,3 +18,3 @@
Namespaces: ([]specs.LinuxNamespace) <nil>,
- Devices: ([]specs.LinuxDevice) (len=1) {
+ Devices: ([]specs.LinuxDevice) (len=2) {
(specs.LinuxDevice) {
@@ -24,2 +24,11 @@
Minor: (int64) 229,
+ FileMode: (*os.FileMode)(-rw-------),
+ UID: (*uint32)(0),
+ GID: (*uint32)(0)
+ },
+ (specs.LinuxDevice) {
+ Path: (string) (len=8) "/dev/sda",
+ Type: (string) (len=1) "b",
+ Major: (int64) 8,
+ Minor: (int64) 0,
FileMode: (*os.FileMode)(-rw-------),
"
time="2018-11-19T13:35:18-08:00" level=debug msg="precreate hook 1 made configuration changes:
--- Old
+++ New
@@ -29,3 +29,3 @@
(specs.LinuxDevice) {
- Path: (string) (len=8) "/dev/sda",
+ Path: (string) (len=8) "/dev/sdb",
Type: (string) (len=1) "b",
"
Ideally those logs would include the container ID, but we don't have
access to that down at this level. I'm not sure if it's worth
teaching RuntimeConfigFilter to accept a *logrus.Entry (so the caller
could use WithFields [1]) or to use a generic logging interface (like
go-log [2]). For now, I've left the container ID unlogged here.
The spew/difflib implementation is based on stretchr/testify/assert,
but I think the ~10 lines I'm borrowing are probably small enough to
stay under the "all copies or substantial portions" condition in its
MIT license.
[1]: https://godoc.org/github.com/sirupsen/logrus#WithFields
[2]: https://github.com/go-log/log
Signed-off-by: W. Trevor King <wking@tremily.us>
There's been a lot of discussion over in [1] about how to support the
NVIDIA folks and others who want to be able to create devices
(possibly after having loaded kernel modules) and bind userspace
libraries into the container. Currently that's happening in the
middle of runc's create-time mount handling before the container
pivots to its new root directory with runc's incorrectly-timed
prestart hook trigger [2]. With this commit, we extend hooks with a
'precreate' stage to allow trusted parties to manipulate the config
JSON before calling the runtime's 'create'.
I'm recycling the existing Hook schema from pkg/hooks for this,
because we'll want Timeout for reliability and When to avoid the
expense of fork/exec when a given hook does not need to make config
changes [3].
[1]: https://github.com/opencontainers/runc/pull/1811
[2]: https://github.com/opencontainers/runc/issues/1710
[3]: https://github.com/containers/libpod/issues/1828#issuecomment-439888059
Signed-off-by: W. Trevor King <wking@tremily.us>
Add the ability to build a remote client in golang that uses all
the same front-end cli code and output code. The initial limitations
here are that it can only be a local client while the bridge and
resolver code is being written for the golang varlink client.
Tests and docs will be added in subsequent PRs.
Signed-off-by: baude <bbaude@redhat.com>
Users have no idea what storage configuration file is used to setup
storage, so adding this to podman info, should make it easier to
discover.
This requires a revendor of containers/storage
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Updating the vendor or runc to pull in some fixes that we need.
In order to get this vendor to work, we needed to update the vendor
of docker/docker, which causes all sorts of issues, just to fix
the docker/pkg/sysinfo. Rather then doing this, I pulled in pkg/sysinfo
into libpod and fixed the code locally.
I then switched the use of docker/pkg/sysinfo to libpod/pkg/sysinfo.
I also switched out the docker/pkg/mount to containers/storage/pkg/mount
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Add support for executing an init binary as PID 1 in a container to
forward signals and reap processes. When the `--init` flag is set for
podman-create or podman-run, the init binary is bind-mounted to
`/dev/init` in the container and "/dev/init --" is prepended to the
container's command.
The default base path of the container-init binary is `/usr/libexec/podman`
while the default binary is catatonit [1]. This default can be changed
permanently via the `init_path` field in the `libpod.conf` configuration
file (which is recommended for packaging) or temporarily via the
`--init-path` flag of podman-create and podman-run.
[1] https://github.com/openSUSE/catatonitFixes: #1670
Signed-off-by: Valentin Rothberg <rothberg@redhat.com>
We had two problems with /dev/shm, first, you mount the
container read/only then /dev/shm was mounted read/only.
This is a bug a tmpfs directory should be read/write within
a read-only container.
The second problem is we were ignoring users mounted /dev/shm
from the host.
If user specified
podman run -d -v /dev/shm:/dev/shm ...
We were dropping this mount and still using the internal mount.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
ParseIDMap function was extracted to idtools in
https://github.com/containers/storage/pull/236
it is already used in containers/storage and buildah, it should be used in
libpod as well.
Signed-off-by: Šimon Lukašík <isimluk@fedoraproject.org>
Podman will search through the directory and will add any device
nodes that it finds. If no devices are found we return an error.
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
Add the possibility to join directly the user and mount namespace
without looking up the parent of the user namespace.
We need this in order to be able the conmon process, as the mount
namespace is kept alive only there.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Display the trust policy of the host system. The trust policy is stored in the /etc/containers/policy.json file and defines a scope of registries or repositories.
Signed-off-by: Qi Wang <qiwan@redhat.com>
Going through and adding options (like tls-verify, signature option, etc)
to some varlink endpoints (like push/pull) many of which had not been
updated since their original authoring.
Signed-off-by: baude <bbaude@redhat.com>
like podman stop of containers, we should allow the user to specify
a timeout override when stopping pods; otherwise they have to wait
the full timeout time specified during the pod/container creation.
Signed-off-by: baude <bbaude@redhat.com>
DockerRegistryOptions.DockerInsecureSkipTLSVerify as an types.OptionalBool
can now represent that value, so forceSecure is redundant.
Signed-off-by: Miloslav Trmač <mitr@redhat.com>
The newly introduced SystemRegistriesConfPath somewhat decreases
duplication, but more importantly will allow future callers to
set just a types.SystemContext.SystemRegistriesConfPath and not call
GetRegistries / GetInsecureRegistries at all.
Signed-off-by: Miloslav Trmač <mitr@redhat.com>
DockerRegistryOptions.DockerInsecureSkipTLSVerify as an types.OptionalBool
can now represent that value, so forceSecure is redundant.
Signed-off-by: Miloslav Trmač <mitr@redhat.com>
Following SystemContext.DockerInsecureSkipTLSVerify, make the
DockerRegistryOne also an OptionalBool, and update callers.
Explicitly document that --tls-verify=true and --tls-verify unset
have different behavior in those commands where the behavior changed
(or where it hasn't changed but the documentation needed updating).
Also make the --tls-verify man page sections a tiny bit more consistent
throughout.
This is a minimal fix, without changing the existing "--tls-verify=true"
paths nor existing manual insecure registry lookups.
Signed-off-by: Miloslav Trmač <mitr@redhat.com>
Add support for podman volume and its subcommands.
The commands supported are:
podman volume create
podman volume inspect
podman volume ls
podman volume rm
podman volume prune
This is a tool to manage volumes used by podman. For now it only handle
named volumes, but eventually it will handle all volumes used by podman.
Signed-off-by: umohnani8 <umohnani@redhat.com>
Callers that only care about the IDs should try to convert the
identifier to an integer before calling the Get* functions, so they
can save the cost of hitting the filesystem and maybe or maybe not
finding the other fields (User.Name, etc.). But callers that *want*
the other fields but only actually need the ID can, with this commit,
just call the Get* function and ignore ErrNo*Entries responses:
user, err := lookup.GetUser(mount, userIDorName)
if err != nil && err != ErrNoPasswdEntries {
return err
}
Previously, they'd have to perform their own integer-conversion
attempt in Get* error handling, with logic like:
user, err := lookup.GetUser(mount, userIDorName)
if err == ErrNoPasswdEntries {
uuid, err := strconv.ParseUint(userIDorName, 10, 32)
if err == nil {
user.Uid = int(uuid)
}
} else if err != nil {
return err
}
Signed-off-by: W. Trevor King <wking@tremily.us>
when a user specifies --pod to podman create|run, we should create that pod
automatically. the port bindings from the container are then inherited by
the infra container. this signicantly improves the workflow of running
containers inside pods with podman. the user is still encouraged to use
podman pod create to have more granular control of the pod create options.
Signed-off-by: baude <bbaude@redhat.com>
We don't need this for anything more than rootless work in Libpod
now, but Buildah still uses it as it was originally written, so
leave it intact as part of our API.
Signed-off-by: Matthew Heon <mheon@redhat.com>
it was reported on IRC that Podman on Ubuntu failed as
newuidmap/newgidmap were not installed by default.
Raise an error if we are not allowing single mappings (used only by
the tests suite) and any of the binaries is not present.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Previous commits ensured that we would use database-configured
paths if not explicitly overridden.
However, our runtime generation did unconditionally override
storage config, which made this useless.
Move rootless storage configuration setup to libpod, and change
storage setup so we only override if a setting is explicitly
set, so we can still override what we want.
Signed-off-by: Matthew Heon <mheon@redhat.com>
do not store the entire file but only the subset of what we have
modified. Also, we were not writing the correct data. Since it is
not trivial to serialize storage.conf correctly and all the various
supported options, serialize only what we care about.
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
My host system runs Fedora Silverblue 29 and I have NetworkManager's
`dns=dnsmasq` setting enabled, so my `/etc/resolv.conf` only has
`127.0.0.1`.
I also run my development podman containers with `--net=host`
for various reasons.
If we have a host network namespace, there's no reason not to just
use the host's nameserver configuration either.
This fixes e.g. accessing content on a VPN, and is also faster
since the container is using cached DNS.
I know this doesn't solve the bigger picture issue of localhost-DNS
conflicting with bridged networking, but that's far more involved,
probably requiring a DNS proxy in the container. This patch
makes my workflow a lot nicer and was easy to write.
Signed-off-by: Colin Walters <walters@verbum.org>
we need to allow users to expose ports to the host for the purposes
of networking, like a webserver. the port exposure must be done at
the time the pod is created.
strictly speaking, the port exposure occurs on the infra container.
Signed-off-by: baude <bbaude@redhat.com>
