services/horizon: Add latest ledger closed_at metrics #3281
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2opremio
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Dec 16, 2020
bartekn
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Jan 6, 2021
This commit adds: * `history_latest_ledger_closed_at` to root resource that determines the latest ingested ledger close time, * `horizon_history_latest_ledger_closed_ago_seconds` to `/metrics` that return time in seconds since the latest ingested ledger close time. `core_latest_ledger - history_latest_ledger` doesn't always determine if Horizon is fully sync with the network. It's possible that underlying Core instance is behind or stuck.
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PR Checklist
PR Structure
otherwise).
services/friendbot, orallordocif the changes are broad or impact manypackages.
Thoroughness
.mdfiles, etc... affected by this change). Take a look in the
docsfolder for a given service,like this one.
Release planning
needed with deprecations, added features, breaking changes, and DB schema changes.
semver, or if it's mainly a patch change. The PR is targeted at the next
release branch if it's not a patch change.
What
This commit adds:
history_latest_ledger_closed_atto root resource that determines the latest ingested ledger close time,horizon_history_latest_ledger_closed_ago_secondsto/metricsthat return time in seconds since the latest ingested ledger close time.Close #3206.
Why
core_latest_ledger - history_latest_ledgerdoesn't always determine if Horizon is fully sync with the network. It's possible that underlying Core instance is behind or stuck.