Improve exported metrics for usage in Grafana dashboards

[ebma]

To make it easier to label the respective metrics in Grafana dashboards, see this ticket, we should add another field to the metrics emitted by the prometheus exporter of the Spacewalk client.

TODO

We should add a field called display_name or similar to each exported metric. This display_name should be compact but expressive. It should mention the currency, but also combine the fields status or type into it, if available.

Examples

• The issue/redeem count gauges should say something like:

issue_count{currency="XCM(0)_Stellar(USDC:GAK...)", status="completed", display_name="XCM(0)_USDC - completed"}
issue_count{currency="XCM(0)_Stellar(USDC:GAK...)", status="expired", display_name="XCM(0)_USDC - expired"}
issue_count{currency="XCM(0)_Stellar(USDC:GAK...)", status="open", display_name="XCM(0)_USDC - open"}

• The stellar balance gauges should say something like:

stellar_balance{currency="XCM(0)_Stellar(USDC:GAK...)", type="actual", display_name="XCM(0)_USDC - actual"}
stellar_balance{currency="XCM(0)_Stellar(USDC:GAK...)", type="actual", display_name="XCM(0)_USDC - required lowerbound"}
stellar_balance{currency="XCM(0)_Stellar(USDC:GAK...)", type="actual", display_name="XCM(0)_USDC - required upperbound"}

For context, this is how metrics are exported at the moment.

[ebma]

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[TorstenStueber]

@ebma is this still relevant? If yes, please move to Ready.

Also note that this ticket here blocks https://app.zenhub.com/workspaces/pendulum-6408a0365cda59c57d39bee5/issues/gh/pendulum-chain/tasks/40

[ebma]

Yes, I think this is still relevant.