Sergei Poljanski
0cc3e1dece
datacenterbingo gets a public page showing whether each datacenter's network answers. The probing lives here, next to the schema and the admin, since the public site only has a read-only role. bin/monitor runs as a second container from the same image. Once a minute it opens one TCP connection to every active target (a handshake or a refusal both count as answered) and folds the results into 5-minute rows per datacenter, plus a per-bucket row for control hosts in Russia, so a lost vantage point isn't mistaken for dark sites. Rows are kept 30 days. Targets are managed at /admin/bingo/monitor; only hosts a public source ties to that one site belong there. Migration 017 also grants the new tables to the bingo role, so the public site can read them without a storage redeploy. Assisted-by: Claude:opus-5-5
55 lines
2.1 KiB
Ruby
55 lines
2.1 KiB
Ruby
Sequel.migration do
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up do
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# Reachability monitor behind datacenterbingo's status page (bin/monitor
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# writes, the public site reads). A target is a host a public source ties
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# to one datacenter; datacenter_id NULL marks a control host in Russia
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# that belongs to no listed site, so "site down" can be told apart from
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# "our vantage point lost Russia".
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create_table :bingo_monitor_targets do
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primary_key :id
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foreign_key :datacenter_id, :bingo_datacenters, on_delete: :cascade
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String :host, null: false
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Integer :port, null: false, default: 443
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String :label
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String :source_url
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TrueClass :active, null: false, default: true
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TrueClass :last_ok
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Integer :last_rtt_ms
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DateTime :last_checked_at
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DateTime :last_change_at
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DateTime :created_at, null: false
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index :datacenter_id
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end
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# Per datacenter per 5-minute bucket: probes sent, probes answered and
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# the summed handshake time of the answered ones.
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create_table :bingo_monitor_samples do
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foreign_key :datacenter_id, :bingo_datacenters, null: false, on_delete: :cascade
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DateTime :bucket_at, null: false
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Integer :checks, null: false, default: 0
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Integer :ok, null: false, default: 0
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Integer :rtt_ms_sum, null: false, default: 0
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primary_key %i[datacenter_id bucket_at]
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end
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# One row per bucket the worker ran in: its rounds (a heartbeat) and the
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# control hosts' results.
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create_table :bingo_monitor_buckets do
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DateTime :bucket_at, primary_key: true
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Integer :rounds, null: false, default: 0
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Integer :control_checks, null: false, default: 0
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Integer :control_ok, null: false, default: 0
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end
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# The public site's read-only role (provisioned by the storage repo).
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if from(:pg_roles).where(rolname: 'bingo').any?
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%w[bingo_monitor_targets bingo_monitor_samples bingo_monitor_buckets].each do |t|
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run "GRANT SELECT ON #{t} TO bingo"
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end
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end
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end
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down do
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drop_table :bingo_monitor_buckets, :bingo_monitor_samples, :bingo_monitor_targets
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end
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end
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