Istio Gateway

Introduction

Istio Gateway is an Envoy-based ingress and egress gateway that provides secure traffic management between external users and services inside the Istio service mesh. It manages external traffic coming into the cluster and provides security, load balancing and observability.

Prometheus metrics for Istio Gateway are exposed via: http://<gateway-host>:15020/metrics (Gateway Metrics)

Kubernetes 2.0 ConfigMap

Users should update or append the existing ConfigMap named opsramp-workload-metric-user-config by adding application-specific fields. These fields may include authentication credentials, collection frequency, and other relevant configurations.

apiVersion: v1
kind: ConfigMap
metadata:
  name: opsramp-workload-metric-user-config
  namespace: opsramp-agent
data:
  workloads: |
    istiogateway:
    - name: istiogateway
      collectionFrequency: 59s
      port: 15020
      filters:
        - regex: 'go_gc_duration_seconds'
          action: include
        - regex: 'sidecar_injection_time_seconds_bucket' 
          action: include
      targetPodSelector:
        matchLabels:
          - key: istio
            operator: ==
            value:
              - ingressgateway

Supported Metrics

Supported metrics for this workload as provided by the Kubernetes 2.0 Agent.

Metric	Description
istio_agent_cert_expiry_seconds	Time in seconds until the Istio agent's certificate expires.
istio_agent_envoy_connection_terminations	Total number of terminated connections by the Istio agent's Envoy proxy.
istio_agent_go_gc_duration_seconds	Duration (in seconds) of garbage collection (GC) cycles in the Istio agent's Go runtime.
istio_agent_go_gc_duration_seconds_sum	Cumulative duration of GC cycles in seconds across the Istio agent's Go runtime.
istio_agent_go_gc_duration_seconds_count	Number of GC cycles performed by the Istio agent's Go runtime.
istio_agent_go_gc_gogc_percent	Percentage of memory utilization at which Go's garbage collector is triggered.
istio_agent_go_gc_gomemlimit_bytes	Memory limit in bytes for the Go garbage collector.
istio_agent_go_goroutines	Current number of active goroutines (lightweight threads) in the Istio agent's Go runtime.
istio_agent_go_info	Information about the Go runtime version used by the Istio agent.
istio_agent_go_memstats_alloc_bytes	Number of allocated bytes in the Go runtime heap.
istio_agent_go_memstats_alloc_bytes_total	Total number of bytes allocated in the Go runtime heap since the program started.
istio_agent_go_memstats_buck_hash_sys_bytes	Number of bytes used by the Go runtime's hash tables.
istio_agent_go_memstats_frees_total	Total number of freed objects in the Go runtime.
istio_agent_go_memstats_gc_sys_bytes	Amount of memory used by the Go garbage collector.
istio_agent_go_memstats_heap_alloc_bytes	Number of bytes allocated in the Go heap.
istio_agent_go_memstats_heap_idle_bytes	Number of idle bytes in the Go heap.
istio_agent_go_memstats_heap_inuse_bytes	Number of bytes currently in use in the Go heap.
istio_agent_go_memstats_heap_objects	Number of objects allocated in the Go heap.
istio_agent_go_memstats_heap_released_bytes	Number of bytes released from the Go heap.
istio_agent_go_memstats_heap_sys_bytes	Total size of the Go heap.
istio_agent_go_memstats_last_gc_time_seconds	Time of the last GC cycle in the Go runtime.
istio_agent_go_memstats_mallocs_total	Total number of allocations in the Go runtime.
istio_agent_go_memstats_mcache_inuse_bytes	Number of bytes in use by the Go runtime's memory cache.
istio_agent_go_memstats_mcache_sys_bytes	Total number of bytes used by the Go runtime's memory cache.
istio_agent_go_memstats_mspan_inuse_bytes	Number of bytes in use by the Go runtime's memory spans.
istio_agent_go_memstats_mspan_sys_bytes	Total number of bytes used by the Go runtime's memory spans.
istio_agent_go_memstats_next_gc_bytes	Number of bytes required before the next GC cycle in the Go runtime.
istio_agent_go_memstats_other_sys_bytes	Other system memory usage by the Go runtime.
istio_agent_go_memstats_stack_inuse_bytes	Number of bytes used by the Go runtime's stack memory.
istio_agent_go_memstats_stack_sys_bytes	Total number of bytes used by the Go runtime's stack memory.
istio_agent_go_memstats_sys_bytes	Total system memory used by the Go runtime.
istio_agent_go_sched_gomaxprocs_threads	Maximum number of threads that the Go scheduler will use.
istio_agent_go_threads	Number of threads currently in use by the Go runtime.
istio_agent_istiod_connection_terminations	Total number of connection terminations to Istiod by the Istio agent.
istio_agent_num_outgoing_requests	Number of outgoing requests made by the Istio agent.
istio_agent_outgoing_latency	Latency of outgoing requests made by the Istio agent.
istio_agent_pilot_xds_send_time_bucket	Histogram of the send time of XDS messages from the Istio agent to Pilot, bucketed.
istio_agent_pilot_xds_send_time_sum	Sum of the send times of XDS messages from the Istio agent to Pilot.
istio_agent_pilot_xds_send_time_count	Count of the XDS messages sent from the Istio agent to Pilot.
istio_agent_process_cpu_seconds_total	Total CPU time used by the Istio agent process in seconds.
istio_agent_process_max_fds	Maximum number of file descriptors the Istio agent process can open.
istio_agent_process_network_receive_bytes_total	Total number of bytes received over the network by the Istio agent process.
istio_agent_process_network_transmit_bytes_total	Total number of bytes transmitted over the network by the Istio agent process.
istio_agent_process_open_fds	Current number of open file descriptors by the Istio agent process.
istio_agent_process_resident_memory_bytes	Amount of memory currently used by the Istio agent process (in bytes).
istio_agent_process_start_time_seconds	Timestamp of when the Istio agent process started (in seconds).
istio_agent_process_virtual_memory_bytes	Total virtual memory used by the Istio agent process (in bytes).
istio_agent_process_virtual_memory_max_bytes	Maximum virtual memory limit for the Istio agent process (in bytes).
istio_agent_scrape_failures_total	Total number of scrape failures by the Istio agent.
istio_agent_scrapes_total	Total number of successful scrapes by the Istio agent.
istio_agent_startup_duration_seconds	Duration (in seconds) for the Istio agent's startup process.
istio_agent_xds_proxy_requests	Total number of XDS proxy requests made by the Istio agent.
istio_agent_xds_proxy_responses	Total number of XDS proxy responses received by the Istio agent.