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authorGiuseppe Scrivano <gscrivan@redhat.com>2020-02-24 17:38:06 +0100
committerGiuseppe Scrivano <gscrivan@redhat.com>2020-04-06 16:32:36 +0200
commit3a0a727110c59332e1a0f5b4a5be311244668a8c (patch)
treeff1afd6d97f329718f15dd541aa95e721690fe65 /docs/source
parent5b853bb272a754a54fa78a3e619de0304864151f (diff)
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userns: support --userns=auto
automatically pick an empty range and create an user namespace for the container. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Diffstat (limited to 'docs/source')
-rw-r--r--docs/source/markdown/podman-create.1.md6
-rw-r--r--docs/source/markdown/podman-run.1.md6
2 files changed, 11 insertions, 1 deletions
diff --git a/docs/source/markdown/podman-create.1.md b/docs/source/markdown/podman-create.1.md
index 38b95edc3..f0494ca7d 100644
--- a/docs/source/markdown/podman-create.1.md
+++ b/docs/source/markdown/podman-create.1.md
@@ -823,6 +823,7 @@ The following examples are all valid:
Without this argument the command will be run as root in the container.
+**--userns**=*auto*[:OPTIONS]
**--userns**=*host*
**--userns**=*keep-id*
**--userns**=container:container
@@ -831,6 +832,11 @@ Without this argument the command will be run as root in the container.
Set the user namespace mode for the container. It defaults to the **PODMAN_USERNS** environment variable. An empty value means user namespaces are disabled.
+
+- `auto`: automatically create a namespace. It is possible to specify other options to `auto`. The supported options are
+ **size=SIZE** to specify an explicit size for the automatic user namespace. e.g. `--userns=auto:size=8192`. If `size` is not specified, `auto` will guess a size for the user namespace.
+ **uidmapping=HOST_UID:CONTAINER_UID:SIZE** to force a UID mapping to be present in the user namespace.
+ **gidmapping=HOST_UID:CONTAINER_UID:SIZE** to force a GID mapping to be present in the user namespace.
- `container`: join the user namespace of the specified container.
- `host`: run in the user namespace of the caller. This is the default if no user namespace options are set. The processes running in the container will have the same privileges on the host as any other process launched by the calling user.
- `keep-id`: creates a user namespace where the current rootless user's UID:GID are mapped to the same values in the container. This option is ignored for containers created by the root user.
diff --git a/docs/source/markdown/podman-run.1.md b/docs/source/markdown/podman-run.1.md
index e8b7d56b7..b21eb9da9 100644
--- a/docs/source/markdown/podman-run.1.md
+++ b/docs/source/markdown/podman-run.1.md
@@ -862,10 +862,14 @@ Sets the username or UID used and optionally the groupname or GID for the specif
Without this argument the command will be run as root in the container.
-**--userns**=**host**|**keep-id**|**container:**_id_|**ns:**_namespace_
+**--userns**=**auto**|**host**|**keep-id**|**container:**_id_|**ns:**_namespace_
Set the user namespace mode for the container. It defaults to the **PODMAN_USERNS** environment variable. An empty value means user namespaces are disabled.
+- **auto**: automatically create a namespace. It is possible to specify other options to `auto`. The supported options are
+ **size=SIZE** to specify an explicit size for the automatic user namespace. e.g. `--userns=auto:size=8192`. If `size` is not specified, `auto` will guess a size for the user namespace.
+ **uidmapping=HOST_UID:CONTAINER_UID:SIZE** to force a UID mapping to be present in the user namespace.
+ **gidmapping=HOST_UID:CONTAINER_UID:SIZE** to force a GID mapping to be present in the user namespace.
- **host**: run in the user namespace of the caller. This is the default if no user namespace options are set. The processes running in the container will have the same privileges on the host as any other process launched by the calling user.
- **keep-id**: creates a user namespace where the current rootless user's UID:GID are mapped to the same values in the container. This option is ignored for containers created by the root user.
- **ns**: run the container in the given existing user namespace.