Ceph » Orchestrator

Conclusions from https://pad.ceph.com/p/orchestration-weekly

• pip install cephadm
• only in addition to RPMs
• as replacmeent for curl

• pip install only to be used on the bootstrap host
• need to find a solution for transferring cephadm. zipped egg only? zip on demand?

Some background infos:

I've tried to improve things in https://github.com/ceph/ceph/pull/32526 half a year ago, but it turned out to be bigger than anticipated.

As it turned out back then, we need to improve two issues first, before we can take bigger steps.

1. `injected_argv` is a big pain point when it comes to refactoring cephadm. Right now, this prevents us from doing anything else
except physically distributing cephadm with some odd hardcoded prefix. In order to have cephadm a proper software, we have to fix this first.

2. People are downloading cephadm directly from github: https://docs.ceph.com/docs/master/cephadm/install/#install-cephadm . This prevents
us from having the source code being something different than the binary. Also, this means have to solve this, till we can add a `--version`
flag to cephadm. Which means, we have to first put cephadm to download.ceph.io or something similar.

Daniel was at that point as well already: https://github.com/ceph/ceph/pull/32662#issuecomment-575047407

In order to make this a success this time, I would advise (This is just an advice!) to split this endeavor into multiple parts (aka PRs):

1. Remove `injected_argv` and instead copy cephadm like so:

hash = sha256('/usr/bin/cephadm') (or any other unique property
ssh remote_host "mkdir -p /tmp/cephadm-$hash" 
scp ... /usr/bin/cephadm ... /tmp/cephadm-$hash/cephadm

2. Release cephadm on download.ceph.com or something. Keep in mind, folks will install cephadm on air-gapped systems!

3. Make cephadm a proper python package (setup.py etc)

4. add a `cephadm --version`

I've attached a possible roadmap for doing this