Updates made to gossamer for Zombienet

[edwardmack]

Task summary

This is a list of updates made to gossamer to enable Zombienet to work without changes:

• Added prometheus gauge substrate_process_start_time_seconds, this metric is used by zombienet to confirm the node has started. Not sure if we want metrics in gossamer that are in the substrate namespace, so consider different ways to handle this.
• Created flag --rpc-cors that zombienet uses when starting nodes, this has not been implemented in gossamer, just the flag has been added so that gossamer will not throw an error when it sees this flag.

Other information and links

• See issue Investigate ZombieNet Integration Requirements #2843 and PR feature(cmd/gossamer): add aliases for cli flags #3098 and feat(zombienet): add zombienet testing to github workflow #3192

[timwu20]

@edwardmack is this issue still valid? Can we move it to ready status?

[edwardmack]

@edwardmack is this issue still valid? Can we move it to ready status?

@timwu20 yes, the --rpc-cors flag has not been implemented yet for gossamer, we're still using a dummy flag as a placeholder for zombienet. We would also need to investigate the promethous gauge usage.