CoreDNS is a DNS server written in Go language. It can be used in a multitude of environments because of its flexibility. CoreDNS is licensed under the Apache License Version 2, and completely open source.
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Go to Resources under the Infrastructure tab to check if your resources are onboarded and the metrics are collected.
Metrics
| OpsRamp Metric | Metric Display Name | Unit | Description |
|---|---|---|---|
| kube_coredns_response_code_count | CoreDNS Response Code Rate | Rate of response status codes | |
| kube_coredns_cache_hits | Cache Hits Rate | Rate of cache hits | |
| kube_coredns_cache_misses | Cache Misses Rate | Rate of cache misses | |
| kube_coredns_cache_size | Cache Size | Number of elements in the cache | |
| kube_coredns_dns_request_count | DNS Requests Rate Per Protocol | Rate of DNS requests made per zone, protocol and family | |
| kube_coredns_dns_request_type_count | DNS Requests Rate Per Type | Rate of DNS requests per type, per zone | |
| kube_coredns_dns_request_duration_seconds | Average Request Time | seconds | Average time taken by each request |
| kube_coredns_forward_request_duration_seconds | Average Forward Request Time | seconds | Average time taken by each forward request |
| kube_coredns_forward_request_count | Upstream Request Rate | Rate of requests made per upstream | |
| kube_coredns_forward_response_rcode_count | RCODEs Upstream Rate | Rate of RCODEs per upstream | |
| kube_coredns_forward_healthcheck_failure_count | Failed Health Checks Number | Number of failed health checks per upstream | |
| kube_coredns_forward_healthcheck_broken_count | Health Checks Broken Counter | Count of when all upstreams are unhealthy | |
| kube_coredns_forward_max_concurrent_reject_count | Max Conccurrent Rejects Rate | Count of the number of queries rejected because the number of concurrent queries were at maximum | |
| kube_coredns_health_request_duration_seconds | Average Health Endpoint Duration | seconds | Average duration to process a HTTP query to the local /health endpoint |
| kube_coredns_dns_request_size | Average Request Size | bytes | Average size of the request |
| kube_coredns_dns_response_size | Average Response Size | bytes | Average size of the response |
| kube_coredns_panic_count | Panic Rate | Rate of panics | |
| kube_coredns_go_gc_duration_seconds | Average GC Invocation Durations | seconds | Average of the GC invocation durations |
| kube_coredns_go_gc_duration_seconds_quantile | GC Invocation Durations Quantiles | Quantile | GC invocation durations Quantiles |
| kube_coredns_go_goroutines | GORoutines Count | Number of goroutines that currently exist | |
| kube_coredns_go_memstats_alloc_bytes | GO Bytes Allocated And In Use | bytes | Number of bytes allocated and still in use |
| kube_coredns_go_memstats_alloc_bytes_total | Total GO Bytes Allocated | bytes | Total number of bytes allocated, even if free |
| kube_coredns_go_memstats_buck_hash_sys_bytes | Bytes Used By Profiling Bucket Hash Table | bytes | Number of bytes used by the profiling bucket hash table |
| kube_coredns_go_memstats_frees_total | Total GO Frees | Total number of frees | |
| kube_coredns_go_memstats_gc_cpu_fraction | GO CPU Time Used By GC | Fraction of this program's available CPU time used by the GC since the program started | |
| kube_coredns_go_memstats_gc_sys_bytes | GO Bytes Used By GC | bytes | Number of bytes used for garbage collection system metadata |
| kube_coredns_go_memstats_heap_alloc_bytes | GO Heap Bytes Allocated | bytes | Number of heap bytes allocated and still in use |
| kube_coredns_go_memstats_heap_idle_bytes | GO Heap Idle Bytes | bytes | Number of heap bytes waiting to be used |
| kube_coredns_go_memstats_heap_inuse_bytes | GO Heap Bytes In Use | bytes | Number of heap bytes that are in use |
| kube_coredns_go_memstats_heap_objects | GO Allocated Heap Objects | Number of allocated objects | |
| kube_coredns_go_memstats_heap_released_bytes | GO Heap Bytes Released | Number of heap bytes released to Operating System | |
| kube_coredns_go_memstats_heap_sys_bytes | GO Heap Bytes Obtained | Number of heap bytes obtained from system | |
| kube_coredns_go_memstats_last_gc_time_seconds | GO GC Seconds Since UNIX Epoch | seconds | Number of seconds since 1970 of last garbage collection |
| kube_coredns_go_memstats_lookups_total | GO Pointer Lookups Rate | Rate of number of pointer lookups | |
| kube_coredns_go_memstats_mallocs_total | GO Malloc Rate | Rate of mallocs | |
| kube_coredns_go_memstats_mcache_inuse_bytes | GO Bytes Used MCache | bytes | Number of bytes in use by mcache structures |
| kube_coredns_go_memstats_mcache_sys_bytes | GO MCache System Bytes | bytes | Number of bytes used for mcache structures obtained from system |
| kube_coredns_go_memstats_mspan_inuse_bytes | GO Bytes Used MSpan | bytes | Number of bytes in use by mspan structures |
| kube_coredns_go_memstats_mspan_sys_bytes | GO MSpan System Bytes | bytes | Number of bytes used for mspan structures obtained from system |
| kube_coredns_go_memstats_next_gc_bytes | GO Next GC Bytes | bytes | Number of heap bytes when next garbage collection will take place |
| kube_coredns_go_memstats_other_sys_bytes | GO Other System Allocations | bytes | Number of bytes used for other system allocations |
| kube_coredns_go_memstats_stack_inuse_bytes | GO Bytes Used Stack Allocator | bytes | Number of bytes in use by the stack allocator |
| kube_coredns_go_memstats_stack_sys_bytes | GO Stack Allocator System Bytes | bytes | Number of bytes obtained from system for stack allocator |
| kube_coredns_go_memstats_sys_bytes | GO System Bytes | bytes | Number of bytes obtained from system |
| kube_coredns_go_threads | GO Threads | Number of OS threads created | |
| kube_coredns_plugin_enabled | CoreDNS Plugins Enabled | Indicates whether a plugin is enabled on per server and zone basis | |
| kube_coredns_process_cpu_seconds_total | Process CPU Rate | seconds | Rate of user and system CPU time spent |
| kube_coredns_process_max_fds | Process Max Open File Descriptors | Maximum number of open file descriptors | |
| kube_coredns_process_open_fds | Process Open File Descriptors | Number of open file descriptors | |
| kube_coredns_process_resident_memory_bytes | Process Resident Memory | bytes | Size of Resident memory |
| kube_coredns_process_virtual_memory_bytes | Process Virtual Memory | bytes | Size of virtual memory |