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Conceptually equivalent to networking by means of slirp4netns(1), with a few practical differences: - pasta(1) forks to background once networking is configured in the namespace and quits on its own once the namespace is deleted: file descriptor synchronisation and PID tracking are not needed - port forwarding is configured via command line options at start-up, instead of an API socket: this is taken care of right away as we're about to start pasta - there's no need for further selection of port forwarding modes: pasta behaves similarly to containers-rootlessport for local binds (splice() instead of read()/write() pairs, without L2-L4 translation), and keeps the original source address for non-local connections like slirp4netns does - IPv6 is not an experimental feature, and enabled by default. IPv6 port forwarding is supported - by default, addresses and routes are copied from the host, that is, container users will see the same IP address and routes as if they were in the init namespace context. The interface name is also sourced from the host upstream interface with the first default route in the routing table. This is also configurable as documented - sandboxing and seccomp(2) policies cannot be disabled - only rootless mode is supported. See https://passt.top for more details about pasta. Also add a link to the maintained build of pasta(1) manual as valid in the man page cross-reference checks: that's where the man page for the latest build actually is -- it's not on Github and it doesn't match any existing pattern, so add it explicitly. Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Podman Documentation
The online man pages and other documents regarding Podman can be found at Read The Docs. The man pages can be found under the Commands link on that page.
Build the Docs
Directory Structure
| Directory | |
|---|---|
| Markdown source for man pages | docs/source/markdown/ |
| man pages aliases as .so files | docs/source/markdown/links/ |
| target for output | docs/build |
| man pages | docs/build/man |
| remote linux man pages | docs/build/remote/linux |
| remote darwin man pages | docs/build/remote/darwin |
| remote windows html pages | docs/build/remote/windows |
Support files
| docs/remote-docs.sh | Read the docs/source/markdown files and format for each platform |
| docs/links-to-html.lua | pandoc filter to do aliases for html files |
| docs/use-pagetitle.lua | pandoc filter to set html document title |
Manpage Syntax
The syntax for the formatting of all man pages can be found here.
API Reference
The latest online documentation is
automatically generated by two cooperating automation systems based on committed upstream
source code. Firstly, the Cirrus-CI docs task builds
pkg/api/swagger.yaml and uploads it to a public-facing location (Google Storage Bucket -
an online service for storing unstructured data). Second, Read The Docs
reacts to the github.com repository change, building the content for the libpod documentation
site. This site includes for the API section,
some javascript which consumes the uploaded swagger.yaml file directly from the Google
Storage Bucket.
Since there are multiple systems and local cache is involved, it's possible that updates to documentation (especially the swagger/API docs) will lag by 10-or-so minutes. However, because the client (i.e. your web browser) is fetching content from multiple locations that do not share a common domain, accessing the API section may show a stack-trace similar to the following:
If reloading the page, or clearing your local cache does not fix the problem, it is
likely caused by broken metadata needed to protect clients from cross-site-scripting
style attacks. Please notify a maintainer
so they may investigate how/why the swagger.yaml file's CORS-metadata is
incorrect, or the file isn't accessible for some other reason.
Local Testing
To build standard man pages, run make docs. Results will be in docs/build/man.
To build HTMLized man pages: Assuming that you have the dependencies installed, then also install (showing Fedora in the example):
$ sudo dnf install python3-sphinx python3-recommonmark
$ pip install sphinx-markdown-tables myst_parser
(The above dependencies are current as of 2022-09-15. If you experience problems, please see requirements.txt in this directory, it will almost certainly be more up-to-date than this README.)
After that completes, cd to the docs directory in your Podman sandbox and then do make html.
You can then preview the html files in docs/build/html with:
python -m http.server 8000 --directory build/html
...and point your web browser at http://localhost:8000/