CoreDNS¶

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CoreDNS 采集器用于采集 CoreDNS 相关的指标数据。

配置¶

前置条件¶

CoreDNS 配置启用 prometheus 插件

采集器配置¶

主机安装Kubernetes

进入 DataKit 安装目录下的 conf.d/coredns 目录，复制 coredns.conf.sample 并命名为 coredns.conf。示例如下：

[[inputs.prom]]
url = "http://127.0.0.1:9153/metrics"
source = "coredns"
metric_types = ["counter", "gauge"]

## filter metrics by names
metric_name_filter = ["^coredns_(acl|cache|dnssec|forward|grpc|hosts|template|dns)_([a-z_]+)$"]

# measurement_prefix = ""
# measurement_name = "prom"

interval = "10s"

# tags_ignore = [""]

## TLS config
tls_open = false
# tls_ca = "/tmp/ca.crt"
# tls_cert = "/tmp/peer.crt"
# tls_key = "/tmp/peer.key"

## customize metrics
[[inputs.prom.measurements]]
  prefix = "coredns_acl_"
  name = "coredns_acl"

[[inputs.prom.measurements]]
  prefix = "coredns_cache_"
  name = "coredns_cache"

[[inputs.prom.measurements]]
  prefix = "coredns_dnssec_"
  name = "coredns_dnssec"

[[inputs.prom.measurements]]
  prefix = "coredns_forward_"
  name = "coredns_forward"

[[inputs.prom.measurements]]
  prefix = "coredns_grpc_"
  name = "coredns_grpc"

[[inputs.prom.measurements]]
  prefix = "coredns_hosts_"
  name = "coredns_hosts"

[[inputs.prom.measurements]]
  prefix = "coredns_template_"
  name = "coredns_template"

[[inputs.prom.measurements]]
  prefix = "coredns_dns_"
  name = "coredns"

配置好后，重启 DataKit 即可。

目前可以通过 ConfigMap 方式注入采集器配置来开启采集器。

指标¶

`coredns_acl`¶

标签

Tag	Description
`host`	Host name
`instance`	Instance endpoint
`server`	Server responsible for the request.
`zone`	Zone name used for the request/response.

指标列表

Metric	Description	Type	Unit
`allowed_requests_total`	Counter of DNS requests being allowed	float	count
`blocked_requests_total`	Counter of DNS requests being blocked	float	count
`dropped_requests_total`	Counter of DNS requests being dropped	float	count
`filtered_requests_total`	Counter of DNS requests being filtered	float	count

`coredns_cache`¶

标签

Tag	Description
`host`	Host name
`instance`	Instance endpoint
`server`	Server responsible for the request
`type`	Cache type
`zones`	Zone name used for the request/response

指标列表

Metric	Description	Type	Unit
`drops_total`	The number responses that are not cached, because the reply is malformed	float	count
`entries`	The number of elements in the cache	float	count
`evictions_total`	The count of cache evictions	float	count
`hits_total`	The count of cache hits	float	count
`misses_total`	The count of cache misses. Deprecated, derive misses from cache hits/requests counters	float	count
`prefetch_total`	The number of times the cache has prefetched a cached item.	float	count
`requests_total`	The count of cache requests	float	count
`served_stale_total`	The number of requests served from stale cache entries	float	count

`coredns_dnssec`¶

标签

Tag	Description
`host`	Host name
`instance`	Instance endpoint
`server`	Server responsible for the request
`type`	signature

指标列表

Metric	Description	Type	Unit
`cache_entries`	The number of elements in the dnssec cache	float	count
`cache_hits_total`	The count of cache hits	float	count
`cache_misses_total`	The count of cache misses	float	count

`coredns_forward`¶

标签

Tag	Description
`host`	Host name
`instance`	Instance endpoint
`proto`	Transport protocol like `udp`, `tcp`, `tcp-tls`
`rcode`	Upstream returned `RCODE`
`to`	Upstream server

指标列表

Metric	Description	Type	Unit
`conn_cache_hits_total`	Counter of connection cache hits per upstream and protocol	float	count
`conn_cache_misses_total`	Counter of connection cache misses per upstream and protocol	float	count
`healthcheck_broken_total`	Counter of the number of complete failures of the health checks	float	count
`healthcheck_failures_total`	Counter of the number of failed health checks	float	count
`max_concurrent_rejects_total`	Counter of the number of queries rejected because the concurrent queries were at maximum	float	count
`request_duration_seconds`	Histogram of the time each request took	float	s
`requests_total`	Counter of requests made per upstream	float	count
`responses_total`	Counter of responses received per upstream	float	count

`coredns_grpc`¶

标签

Tag	Description
`host`	Host name
`instance`	Instance endpoint
`rcode`	Upstream returned `RCODE`
`to`	Upstream server

指标列表

Metric	Description	Type	Unit
`request_duration_seconds`	Histogram of the time each request took	float	s
`requests_total`	Counter of requests made per upstream	float	count
`responses_total`	Counter of requests made per upstream	float	count

`coredns_hosts`¶

标签

Tag	Description
`host`	Host name
`instance`	Instance endpoint

指标列表

Metric	Description	Type	Unit
`entries`	The combined number of entries in hosts and Corefile	float	count
`reload_timestamp_seconds`	The timestamp of the last reload of hosts file	float	sec

`coredns_template`¶

标签

Tag	Description
`class`	The query class (usually `IN`)
`host`	Host name
`instance`	Instance endpoint
`section`	Section label
`server`	Server responsible for the request
`template`	Template label
`type`	The RR type requested (e.g. `PTR`
`view`	View name
`zone`	Zone name

指标列表

Metric	Description	Type	Unit
`failures_total`	Counter of go template failures	float	count
`matches_total`	Counter of template regex matches	float	count
`rr_failures_total`	Counter of mis-templated RRs	float	count

`coredns`¶

标签

Tag	Description
`goversion`	Golang version
`hash`	Is `sha512`
`host`	Host name
`instance`	Instance endpoint
`name`	Handler name
`plugin`	The name of the plugin that made the write to the client
`proto`	Transport protocol like `udp`, `tcp`, `tcp-tls`
`rcode`	Upstream returned `RCODE`
`revision`	Gitcommit contains the commit where we built CoreDNS from
`server`	Server responsible for the request
`service_kind`	Service kind
`status`	HTTPs status code
`value`	The returned hash value
`version`	CoreDNS version
`view`	View name
`zone`	Zone name used for the request/response

指标列表

Metric	Description	Type	Unit
`autopath_success_total`	Counter of requests that did auto path	float	count
`build_info`	A metric with a constant '1' value labeled by version, revision, and Go version from which CoreDNS was built	float	bool
`dns64_requests_translated_total`	Counter of DNS requests translated by dns64	float	count
`dns_do_requests_total`	Counter of DNS requests with DO bit set per zone	float	count
`dns_https_responses_total`	Counter of DoH responses per server and http status code	float	count
`dns_panics_total`	A metrics that counts the number of panics	float	count
`dns_plugin_enabled`	A metric that indicates whether a plugin is enabled on per server and zone basis	float	bool
`dns_request_duration_seconds`	Histogram of the time (in seconds) each request took per zone	float	s
`dns_request_size_bytes`	Size of the `EDNS0` UDP buffer in bytes (64K for TCP) per zone and protocol	float	B
`dns_requests_total`	Counter of DNS requests made per zone, protocol and family	float	count
`dns_response_size_bytes`	Size of the returned response in bytes	float	B
`dns_responses_total`	Counter of response status codes	float	count
`health_request_duration_seconds`	Histogram of the time (in seconds) each request took	float	s
`health_request_failures_total`	The number of times the health checks failed	float	count
`kubernetes_dns_programming_duration_seconds`	Histogram of the time (in seconds) it took to program a dns instance	float	s
`local_localhost_requests_total`	Counter of localhost. `domain` requests	float	count
`reload_failed_total`	Counter of the number of failed reload attempts	float	count
`reload_version_info`	A metric with a constant '1' value labeled by hash, and value which type of hash generated	float	bool

CoreDNS¶

配置¶

前置条件¶

采集器配置¶

指标¶

coredns_acl¶

coredns_cache¶

coredns_dnssec¶

coredns_forward¶

coredns_grpc¶

coredns_hosts¶

coredns_template¶

coredns¶

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`coredns_acl`¶

`coredns_cache`¶

`coredns_dnssec`¶

`coredns_forward`¶

`coredns_grpc`¶

`coredns_hosts`¶

`coredns_template`¶

`coredns`¶