[Ingest Manager] Add ability to upgrade the agent in Fleet

[neptunian]

Design: #68310

• Add UI for upgrading the agent
• Add UI for bulk upgrading the agent
• Add Bulk upgrade api

Agent Dependencies that need to be completed:

• Reporting that the agent is upgradeable [Elastic Agent] Report to Fleet when Agent can be upgraded beats#21318
• Agent reports new status of "updating"
• Is agent a snapshot [Ingest Manager] Send snapshot flag together with metadata beats#21285

[elasticmachine]

Pinging @elastic/ingest-management (Team:Ingest Management)

[neptunian]

@ph @ruflin @michalpristas I'm having some trouble getting the file for the agent when it's a snapshot, due to the hash in the url. Is there anyway for me to know this? https://snapshots.elastic.co/8.0.0-7e40d4e0/downloads/beats/elastic-agent/elastic-agent-8.0.0-SNAPSHOT-linux-x86_64.tar.gz

Also I commented here elastic/beats#21285 (comment), if its possible to send the package type back as part of the local_metadata so I could get the file type for the url.

[ruflin]

@neptunian Why is Fleet creating the URL?

[neptunian]

@ruflin A requirement from the agent side that @michalpristas can explain. As discussed in email, for now, Fleet will not be creating the URL and the Agent will.

[jfsiii]

@neptunian I'm not sure if this helps long-term, but you can get a list from a URL like https://artifacts-api.elastic.co/v1/branches/master/builds/latest/projects/beats/ and use type and os to get find the entry and then use that url to download the image

[jfsiii]

@neptunian if you want to automate it, I found https://artifacts-api.elastic.co/v1/search/8.0-SNAPSHOT/kibana in my history. I tried a few for elastic-agent and these all work

https://artifacts-api.elastic.co/v1/search/8.0-SNAPSHOT/elastic-agent
https://artifacts-api.elastic.co/v1/search/7.x/elastic-agent
https://artifacts-api.elastic.co/v1/search/7.9.2/elastic-agent

[neptunian]

@jfsiii thanks, aware of the artifacts api though it would be nice trying to avoid making a request (and i'm not sure we can do a CORS request, there seems to be no example of it elsewhere.). I also don't know the type (see my comment above). At the moment it's easier for the agent to get the url.

[jfsiii]

@neptunian 👍 I missed the type part and now see it's not happening in Fleet anyway. If it comes back up, LMK and I can help out with the network request.