diff options
Diffstat (limited to 'docs/source/markdown/options')
| -rw-r--r-- | docs/source/markdown/options/dns-opt.container.md | 3 | ||||
| -rw-r--r-- | docs/source/markdown/options/dns-search.container.md | 4 | ||||
| -rw-r--r-- | docs/source/markdown/options/http-proxy.md | 15 | ||||
| -rw-r--r-- | docs/source/markdown/options/restart.md | 15 | ||||
| -rw-r--r-- | docs/source/markdown/options/signal.md | 4 | ||||
| -rw-r--r-- | docs/source/markdown/options/subgidname.md | 5 | ||||
| -rw-r--r-- | docs/source/markdown/options/subuidname.md | 5 | ||||
| -rw-r--r-- | docs/source/markdown/options/systemd.md | 29 | ||||
| -rw-r--r-- | docs/source/markdown/options/userns.container.md | 47 |
9 files changed, 127 insertions, 0 deletions
diff --git a/docs/source/markdown/options/dns-opt.container.md b/docs/source/markdown/options/dns-opt.container.md new file mode 100644 index 000000000..ea26fd013 --- /dev/null +++ b/docs/source/markdown/options/dns-opt.container.md @@ -0,0 +1,3 @@ +#### **--dns-opt**=*option* + +Set custom DNS options. Invalid if using **--dns-opt** with **--network** that is set to **none** or **container:**_id_. diff --git a/docs/source/markdown/options/dns-search.container.md b/docs/source/markdown/options/dns-search.container.md new file mode 100644 index 000000000..5a803ba39 --- /dev/null +++ b/docs/source/markdown/options/dns-search.container.md @@ -0,0 +1,4 @@ +#### **--dns-search**=*domain* + +Set custom DNS search domains. Invalid if using **--dns-search** with **--network** that is set to **none** or **container:**_id_. +Use **--dns-search=.** if you don't wish to set the search domain. diff --git a/docs/source/markdown/options/http-proxy.md b/docs/source/markdown/options/http-proxy.md new file mode 100644 index 000000000..f83dcde4a --- /dev/null +++ b/docs/source/markdown/options/http-proxy.md @@ -0,0 +1,15 @@ +#### **--http-proxy** + +By default proxy environment variables are passed into the container if set +for the Podman process. This can be disabled by setting the value to **false**. +The environment variables passed in include **http_proxy**, +**https_proxy**, **ftp_proxy**, **no_proxy**, and also the upper case versions of +those. This option is only needed when the host system must use a proxy but +the container should not use any proxy. Proxy environment variables specified +for the container in any other way will override the values that would have +been passed through from the host. (Other ways to specify the proxy for the +container include passing the values with the **--env** flag, or hard coding the +proxy environment at container build time.) +(This option is not available with the remote Podman client, including Mac and Windows (excluding WSL2) machines) + +Defaults to **true**. diff --git a/docs/source/markdown/options/restart.md b/docs/source/markdown/options/restart.md new file mode 100644 index 000000000..825ae613f --- /dev/null +++ b/docs/source/markdown/options/restart.md @@ -0,0 +1,15 @@ +#### **--restart**=*policy* + +Restart policy to follow when containers exit. +Restart policy will not take effect if a container is stopped via the **podman kill** or **podman stop** commands. + +Valid _policy_ values are: + +- `no` : Do not restart containers on exit +- `on-failure[:max_retries]` : Restart containers when they exit with a non-zero exit code, retrying indefinitely or until the optional *max_retries* count is hit +- `always` : Restart containers when they exit, regardless of status, retrying indefinitely +- `unless-stopped` : Identical to **always** + +Please note that restart will not restart containers after a system reboot. +If this functionality is required in your environment, you can invoke Podman from a **systemd.unit**(5) file, or create an init script for whichever init system is in use. +To generate systemd unit files, please see **podman generate systemd**. diff --git a/docs/source/markdown/options/signal.md b/docs/source/markdown/options/signal.md new file mode 100644 index 000000000..6e6c03657 --- /dev/null +++ b/docs/source/markdown/options/signal.md @@ -0,0 +1,4 @@ +#### **--signal**, **-s**=**signal** + +Signal to send to the container<<|s in the pod>>. For more information on Linux signals, refer to *signal(7)*. +The default is **SIGKILL**. diff --git a/docs/source/markdown/options/subgidname.md b/docs/source/markdown/options/subgidname.md new file mode 100644 index 000000000..1ca0496d0 --- /dev/null +++ b/docs/source/markdown/options/subgidname.md @@ -0,0 +1,5 @@ +#### **--subgidname**=*name* + +Run the container in a new user namespace using the map with _name_ in the _/etc/subgid_ file. +If running rootless, the user needs to have the right to use the mapping. See **subgid**(5). +This flag conflicts with **--userns** and **--gidmap**. diff --git a/docs/source/markdown/options/subuidname.md b/docs/source/markdown/options/subuidname.md new file mode 100644 index 000000000..bd7b61575 --- /dev/null +++ b/docs/source/markdown/options/subuidname.md @@ -0,0 +1,5 @@ +#### **--subuidname**=*name* + +Run the container in a new user namespace using the map with _name_ in the _/etc/subuid_ file. +If running rootless, the user needs to have the right to use the mapping. See **subuid**(5). +This flag conflicts with **--userns** and **--uidmap**. diff --git a/docs/source/markdown/options/systemd.md b/docs/source/markdown/options/systemd.md new file mode 100644 index 000000000..a341edbc2 --- /dev/null +++ b/docs/source/markdown/options/systemd.md @@ -0,0 +1,29 @@ +#### **--systemd**=*true* | *false* | *always* + +Run container in systemd mode. The default is **true**. + +The value *always* enforces the systemd mode is enforced without +looking at the executable name. Otherwise, if set to true and the +command you are running inside the container is **systemd**, **/usr/sbin/init**, +**/sbin/init** or **/usr/local/sbin/init**. + +Running the container in systemd mode causes the following changes: + +* Podman mounts tmpfs file systems on the following directories + * _/run_ + * _/run/lock_ + * _/tmp_ + * _/sys/fs/cgroup/systemd_ + * _/var/lib/journal_ +* Podman sets the default stop signal to **SIGRTMIN+3**. +* Podman sets **container_uuid** environment variable in the container to the +first 32 characters of the container id. + +This allows systemd to run in a confined container without any modifications. + +Note that on **SELinux** systems, systemd attempts to write to the cgroup +file system. Containers writing to the cgroup file system are denied by default. +The **container_manage_cgroup** boolean must be enabled for this to be allowed on an SELinux separated system. +``` +setsebool -P container_manage_cgroup true +``` diff --git a/docs/source/markdown/options/userns.container.md b/docs/source/markdown/options/userns.container.md new file mode 100644 index 000000000..8f96892df --- /dev/null +++ b/docs/source/markdown/options/userns.container.md @@ -0,0 +1,47 @@ +#### **--userns**=*mode* + +Set the user namespace mode for the container. It defaults to the **PODMAN_USERNS** environment variable. An empty value ("") means user namespaces are disabled unless an explicit mapping is set with the **--uidmap** and **--gidmap** options. + +This option is incompatible with **--gidmap**, **--uidmap**, **--subuidname** and **--subgidname**. + +Rootless user --userns=Key mappings: + +Key | Host User | Container User +----------|---------------|--------------------- +"" |$UID |0 (Default User account mapped to root user in container.) +keep-id |$UID |$UID (Map user account to same UID within container.) +auto |$UID | nil (Host User UID is not mapped into container.) +nomap |$UID | nil (Host User UID is not mapped into container.) + +Valid _mode_ values are: + +**auto**[:_OPTIONS,..._]: automatically create a unique user namespace. + +The `--userns=auto` flag, requires that the user name `containers` and a range of subordinate user ids that the Podman container is allowed to use be specified in the /etc/subuid and /etc/subgid files. + +Example: `containers:2147483647:2147483648`. + +Podman allocates unique ranges of UIDs and GIDs from the `containers` subordinate user ids. The size of the ranges is based on the number of UIDs required in the image. The number of UIDs and GIDs can be overridden with the `size` option. + +The rootless option `--userns=keep-id` uses all the subuids and subgids of the user. Using `--userns=auto` when starting new containers will not work as long as any containers exist that were started with `--userns=keep-id`. + + Valid `auto` options: + + - *gidmapping*=_CONTAINER_GID:HOST_GID:SIZE_: to force a GID mapping to be present in the user namespace. + - *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 estimate a size for the user namespace. + - *uidmapping*=_CONTAINER_UID:HOST_UID:SIZE_: to force a UID mapping to be present in the user namespace. + +**container:**_id_: join the user namespace of the specified container. + +**host**: run in the user namespace of the caller. The processes running in the container will have the same privileges on the host as any other process launched by the calling user (default). + +**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 not allowed for containers created by the root user. + + Valid `keep-id` options: + + - *uid*=UID: override the UID inside the container that will be used to map the current rootless user to. + - *gid*=GID: override the GID inside the container that will be used to map the current rootless user to. + +**nomap**: creates a user namespace where the current rootless user's UID:GID are not mapped into the container. This option is not allowed for containers created by the root user. + +**ns:**_namespace_: run the <<container|pod>> in the given existing user namespace. |