netdata/health/health.d/httpcheck.conf

# This is a fast-reacting no-notification alarm ideal for custom dashboards or badges
 template: httpcheck_web_service_up
       on: httpcheck.status
    class: Utilization
     type: Web Server
component: HTTP endpoint
   lookup: average -1m unaligned percentage of success
     calc: ($this < 75) ? (0) : ($this)
    every: 5s
    units: up/down
     info: HTTP check endpoint ${label:url} liveness status
       to: silent

 template: httpcheck_web_service_bad_content
       on: httpcheck.status
    class: Workload
     type: Web Server
component: HTTP endpoint
   lookup: average -5m unaligned percentage of bad_content
    every: 10s
    units: %
     warn: $this >= 10 AND $this < 40
     crit: $this >= 40
    delay: down 5m multiplier 1.5 max 1h
  summary: HTTP check for ${label:url} unexpected content
     info: Percentage of HTTP responses from ${label:url} with unexpected content in the last 5 minutes
       to: webmaster

 template: httpcheck_web_service_bad_status
       on: httpcheck.status
    class: Workload
     type: Web Server
component: HTTP endpoint
   lookup: average -5m unaligned percentage of bad_status
    every: 10s
    units: %
     warn: $this >= 10 AND $this < 40
     crit: $this >= 40
    delay: down 5m multiplier 1.5 max 1h
  summary: HTTP check for ${label:url} unexpected status
     info: Percentage of HTTP responses from ${label:url} with unexpected status in the last 5 minutes
       to: webmaster

 template: httpcheck_web_service_bad_header
       on: httpcheck.status
    class: Errors
     type: Web Server
component: HTTP endpoint
   lookup: average -5m unaligned percentage of bad_header
    every: 10s
    units: %
     warn: $this >= 10 AND $this < 40
     crit: $this >= 40
    delay: down 5m multiplier 1.5 max 1h
  summary: HTTP check for ${label:url} unexpected header
     info: Percentage of HTTP responses from ${label:url} with unexpected header in the last 5 minutes
       to: webmaster

 template: httpcheck_web_service_timeouts
       on: httpcheck.status
    class: Latency
     type: Web Server
component: HTTP endpoint
   lookup: average -5m unaligned percentage of timeout
    every: 10s
    units: %
     warn: $this >= 10 AND $this < 40
     crit: $this >= 40
    delay: down 5m multiplier 1.5 max 1h
  summary: HTTP check for ${label:url} timeouts
     info: Percentage of timed-out HTTP requests to ${label:url} in the last 5 minutes
       to: webmaster

 template: httpcheck_web_service_no_connection
       on: httpcheck.status
    class: Errors
     type: Other
component: HTTP endpoint
   lookup: average -5m unaligned percentage of no_connection
    every: 10s
    units: %
     warn: $this >= 10 AND $this < 40
     crit: $this >= 40
    delay: down 5m multiplier 1.5 max 1h
  summary: HTTP check for ${label:url} failed requests
     info: Percentage of failed HTTP requests to ${label:url} in the last 5 minutes
       to: webmaster