Integrate monitoring into local grid

Builds on !87 (merged). Implements privatestorageops#344.

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This MR integrates my previous work into the PrivateStorageio repo. This MR is for the local deployment, subsequent MRs will add this to staging and finally production.

Getting close :)

This does have:

• Server software (Grafana, Prometheus) on the monitoring server
• Prometheus Node Exporter on the nodes
• Grafana config for a nice Resources Dashboard
• Some clean up work.

This does not include:

• Centralized logging. Loki is too old in Nixpkgs 19.09. Will be fixed later.
• A services dashboard / monitoring of our software. That will be extra MRs.

After merging & morph deploying this, there's a Grafana running on the local monitoring host. Connect to it through a SSH tunnel and you get something like this:

• Related to privatestorageops#285
• Related to privatestorageops#293
• Related to privatestorageops#271
• Related to privatestorageops#301

added Monitoring label

changed the description

added 1 commit

• e2e770c5 - Add hosts mapping

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added 1 commit

• 2a8fb2f4 - Node exporter: Opening firewall once is enough

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added 1 commit

• 4d45d824 - node exporter: only accept packets from monitoringvpn

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added 1 commit

• 108796a0 - Clean up, whitespace/comment/line ordering only changes

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marked this merge request as ready

added 10 commits

• 87c7d0bc - Add docs on how to create a VPN client private and pubkey in one line
• 45d02576 - Remove parameter from config.json
• c1093ad8 - fix vpn private key path pointers
• 97469b37 - Add docs on how to create VPN keypairs
• 94691286 - Rename makePeers -> clients
• 73d379a6 - Move key generating docs into operations documentation
• 435d9c80 - More sensible defaults for the VPN key material location
• 18c5fc6d - Paths don't end with slashes here
• 42dc9127 - Use wireguard default port
• e0050b9a - Merge branch '341.monitoring-vpn' into 344.integrate-monitoring-into-local-grid

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added 1 commit

• 15e14888 - Grafana: close web ports

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resolved all threads

Gone through once more; I believe this is done. Looking fwd to your improvement suggestions @jcalderone !

changed the description

added 2 commits

• 5e99d8f4 - Assume preshared key to reside where the other keys are
• 791a48d7 - Merge branch '341.monitoring-vpn' into 344.integrate-monitoring-into-local-grid

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mentioned in merge request !89 (merged)

mentioned in merge request !91 (merged)