Implement additional alerts

[magik6k]

Checklist

• [X] This is not a new feature or an enhancement to the Filecoin protocol. If it is, please open an FIP issue.
• [X] This is not a new feature request. If it is, please file a feature request instead.
• [X] This is not brainstorming ideas. If you have an idea you'd like to discuss, please open a new discussion on the lotus forum and select the category as Ideas.
• [X] I have a specific, actionable, and well motivated improvement to propose.

Lotus component

• [ ] lotus daemon - chain sync
• [ ] lotus miner - mining and block production
• [ ] lotus miner/worker - sealing
• [ ] lotus miner - proving(WindowPoSt)
• [ ] lotus miner/market - storage deal
• [ ] lotus miner/market - retrieval deal
• [ ] lotus miner/market - data transfer
• [ ] lotus client
• [ ] lotus JSON-RPC API
• [ ] lotus message management (mpool)
• [ ] Other

Improvement Suggestion

https://github.com/filecoin-project/lotus/pull/7108 Added simple alert system. Now we should implement some more alerts:

• [ ] Space in repo dirs (taking into account mounts)
• [ ] Miner
  • [ ] Faulted partitions
  • [ ] Low balances
• [ ] Market provider
  • [ ] Reachability
  • [ ] on-chain config
• [ ] Low memory (maybe)
  • [ ] Low memory for window PoSt
• [ ] Network / sync issues
• [ ] Slow warmup post

(feel free to post ideas in comments)

[f8-ptrk]

maybe provide a websocket to listen to these alerts