Operations
Dyno Health Monitor
Pings Heroku dynos every few minutes, checks response times and error rates, alerts Slack if a dyno is slow or crashing.
Monitoring service + Slack webhook
Build a monitoring agent that watches four critical system layers: compute health (Heroku dyno response times and error rates), external integrations (carrier uptime checks), data freshness (catalog sync windows), and financial accuracy (tax sync drift). Each monitor runs on a schedule, tests its system with a live request, and posts to Slack when thresholds breach. The pattern handles both infrastructure and business-logic failures in one agent.
Pings Heroku dynos every few minutes, checks response times and error rates, alerts Slack if a dyno is slow or crashing.
Tests carrier integrations (ShipEngine, FedEx, UPS) on schedule, confirms rate lookups and label generation work, flags when a carrier goes offline.
# Admin GraphQL — test fulfillment orders to confirm carrier availability
query TestCarrierRates {
fulfillmentOrders(first: 10) {
edges {
node {
id
status
lineItems(first: 5) {
edges {
node {
id
lineItem {
quantity
}
}
}
}
deliveryMethod {
id
}
}
}
}
}Compares product counts, metafield values, and inventory timestamps in the Shopify store to the source of truth, alerts if a sync hasn't run or data looks stale.
# Admin GraphQL — check product sync freshness
query CheckCatalogFreshness {
products(first: 1, query: "updated_at:>2024-01-01", sortKey: UPDATED_AT, reverse: true) {
edges {
node {
id
handle
updatedAt
metafield(namespace: "custom", key: "last_sync") {
value
}
}
}
}
}
# On the monitoring worker: compare updatedAt timestamps against current time.
# If no products updated in the last 24h (or your interval), fire a Slack alert.Watches tax records and rates in the tax system (TaxJar, Vertex, Avalara) against Shopify order tax data, alerts if calculations diverge or a sync worker fails.
# Admin GraphQL — sample recent orders for tax audit
query TaxDriftAudit {
orders(first: 10, query: "created_at:>2024-01-15", sortKey: CREATED_AT, reverse: true) {
edges {
node {
id
name
createdAt
totalTaxSet {
shopMoney {
amount
currencyCode
}
}
lineItems(first: 50) {
edges {
node {
id
sku
taxLines {
title
ratePercentage
price
}
}
}
}
}
}
}
}
# On the worker: fetch the same orders from TaxJar/Vertex and compare totalTaxSet amounts.Sketch your build in 30 seconds — voice, type, or attach a screenshot.
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