If CONTAINER_HOST env variable is set default podman --remote=true

Users enabling CONTAINER_HOST==PATH is indicating to podman they intend
to use remote functionality.

Fixes: https://github.com/containers/podman/issues/11196

Update man pages to document all of the environment variables.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/docs/source/markdown/podman-remote.1.md b/docs/source/markdown/podman-remote.1.md
index 1a6c7d3cc..fb77f3300 100644
--- a/docs/source/markdown/podman-remote.1.md
+++ b/docs/source/markdown/podman-remote.1.md
@@ -29,6 +29,8 @@ The `containers.conf` file should be placed under `$HOME/.config/containers/cont
 
 Remote connection name
 
+Overrides environment variable `CONTAINER_CONNECTION` if set.
+
 #### **--help**, **-h**
 
 Print usage statement
@@ -71,6 +73,26 @@ URL value resolution precedence:
 
 Print the version
 
+## Environment Variables
+
+Podman can set up environment variables from env of [engine] table in containers.conf. These variables can be overridden by passing  environment variables before the `podman` commands.
+
+#### **CONTAINERS_CONF**
+
+Set default locations of containers.conf file
+
+#### **CONTAINER_CONNECTION**
+
+Set default `--connection` value to access Podman service.
+
+#### **CONTAINER_HOST**
+
+Set default `--url` value to access Podman service.
+
+#### **CONTAINER_SSHKEY**
+
+Set default `--identity` path to ssh key file value used to access Podman service.
+
 ## Exit Status
 
 The exit code from `podman` gives information about why the container