diff options
| -rw-r--r-- | docs/source/markdown/podman-build.1.md | 4 | ||||
| -rw-r--r-- | docs/source/markdown/podman-create.1.md | 4 | ||||
| -rw-r--r-- | docs/source/markdown/podman-run.1.md | 4 | ||||
| -rw-r--r-- | troubleshooting.md | 18 |
4 files changed, 29 insertions, 1 deletions
diff --git a/docs/source/markdown/podman-build.1.md b/docs/source/markdown/podman-build.1.md index 6c8f239a6..fac8296ad 100644 --- a/docs/source/markdown/podman-build.1.md +++ b/docs/source/markdown/podman-build.1.md @@ -176,6 +176,10 @@ value can be entered. The password is entered without echo. Add a host device to the container. The format is `<device-on-host>[:<device-on-container>][:<permissions>]` (e.g. --device=/dev/sdc:/dev/xvdc:rwm) +Note: if the user only has access rights via a group then accessing the device +from inside a rootless container will fail. The `crun` runtime offers a +workaround for this by adding the option `--annotation io.crun.keep_original_groups=1`. + **--disable-compression, -D** Don't compress filesystem layers when building the image unless it is required diff --git a/docs/source/markdown/podman-create.1.md b/docs/source/markdown/podman-create.1.md index 82d2e8f6a..85aa81553 100644 --- a/docs/source/markdown/podman-create.1.md +++ b/docs/source/markdown/podman-create.1.md @@ -204,6 +204,10 @@ Specify the key sequence for detaching a container. Format is a single character Add a host device to the container. The format is `<device-on-host>[:<device-on-container>][:<permissions>]` (e.g. --device=/dev/sdc:/dev/xvdc:rwm) +Note: if the user only has access rights via a group then accessing the device +from inside a rootless container will fail. The `crun` runtime offers a +workaround for this by adding the option `--annotation io.crun.keep_original_groups=1`. + **--device-read-bps**=*path* Limit read rate (bytes per second) from a device (e.g. --device-read-bps=/dev/sda:1mb) diff --git a/docs/source/markdown/podman-run.1.md b/docs/source/markdown/podman-run.1.md index e1177cb34..e8744de35 100644 --- a/docs/source/markdown/podman-run.1.md +++ b/docs/source/markdown/podman-run.1.md @@ -210,6 +210,10 @@ Specify the key sequence for detaching a container. Format is a single character Add a host device to the container. The format is `<device-on-host>[:<device-on-container>][:<permissions>]` (e.g. --device=/dev/sdc:/dev/xvdc:rwm) +Note: if the user only has access rights via a group then accessing the device +from inside a rootless container will fail. The `crun` runtime offers a +workaround for this by adding the option `--annotation io.crun.keep_original_groups=1`. + **--device-read-bps**=*path* Limit read rate (bytes per second) from a device (e.g. --device-read-bps=/dev/sda:1mb) diff --git a/troubleshooting.md b/troubleshooting.md index 432c0e32b..d122983d7 100644 --- a/troubleshooting.md +++ b/troubleshooting.md @@ -468,4 +468,20 @@ $ podman unshare cat /proc/self/uid_map 1 100000 65536 ``` -Reference [subuid](http://man7.org/linux/man-pages/man5/subuid.5.html) and [subgid](http://man7.org/linux/man-pages/man5/subgid.5.html) man pages for more detail.
\ No newline at end of file +Reference [subuid](http://man7.org/linux/man-pages/man5/subuid.5.html) and [subgid](http://man7.org/linux/man-pages/man5/subgid.5.html) man pages for more detail. + +### 20) Passed-in device can't be accessed in rootless container + +As a non-root user you have group access rights to a device that you want to +pass into a rootless container with `--device=...`. + +#### Symptom + +Any access inside the container is rejected with "Permission denied". + +#### Solution + +The runtime uses `setgroups(2)` hence the process looses all additional groups +the non-root user has. If you use the `crun` runtime, 0.10.4 or newer, +then you can enable a workaround by adding `--annotation io.crun.keep_original_groups=1` +to the `podman` command line. |