Prometheus scrape

Collect metrics via the Prometheus client

Alias

This component was previously called the prometheus source. Make sure to update your Vector configuration to accommodate the name change:

[sources.my_prometheus_scrape_source]
+type = "prometheus_scrape"
-type = "prometheus"

Configuration

Example configurations

{
  "sources": {
    "my_source_id": {
      "type": "prometheus_scrape",
      "endpoints": [
        "http://localhost:9090/metrics"
      ],
      "scrape_interval_secs": 15,
      "instance_tag": "instance",
      "endpoint_tag": "endpoint",
      "honor_labels": null
    }
  }
}

[sources.my_source_id]
type = "prometheus_scrape"
endpoints = [ "http://localhost:9090/metrics" ]
scrape_interval_secs = 15
instance_tag = "instance"
endpoint_tag = "endpoint"

---
sources:
  my_source_id:
    type: prometheus_scrape
    endpoints:
      - http://localhost:9090/metrics
    scrape_interval_secs: 15
    instance_tag: instance
    endpoint_tag: endpoint
    honor_labels: null

{
  "sources": {
    "my_source_id": {
      "type": "prometheus_scrape",
      "endpoints": [
        "http://localhost:9090/metrics"
      ],
      "scrape_interval_secs": 15,
      "instance_tag": "instance",
      "endpoint_tag": "endpoint",
      "honor_labels": null
    }
  }
}

[sources.my_source_id]
type = "prometheus_scrape"
endpoints = [ "http://localhost:9090/metrics" ]
scrape_interval_secs = 15
instance_tag = "instance"
endpoint_tag = "endpoint"

---
sources:
  my_source_id:
    type: prometheus_scrape
    endpoints:
      - http://localhost:9090/metrics
    scrape_interval_secs: 15
    instance_tag: instance
    endpoint_tag: endpoint
    honor_labels: null
    proxy: null
    tls: null
    auth: null

auth

optional object

Configures the authentication strategy.

auth.password

optional string literal

The basic authentication password.

Examples

"${PROMETHEUS_PASSWORD}"

"password"

auth.strategy

optional string literal enum

The authentication strategy to use.

Enum options

Option	Description
`basic`	The basic authentication strategy.
`bearer`	The bearer token authentication strategy.

Examples

"basic"

"bearer"

auth.token

optional string literal

The token to use for bearer authentication

Examples

"${API_TOKEN}"

"xyz123"

auth.user

optional string literal

The basic authentication user name.

Examples

"${PROMETHEUS_USERNAME}"

"username"

endpoint_tag

common optional string literal

The tag name added to each event representing the scraped instance’s endpoint.

Examples

"endpoint"

endpoints

required [string]

Endpoints to scrape metrics from.

Array string literal

Examples

[
  "http://localhost:9090/metrics"
]

Controls how tag conflicts are handled if the scraped source has tags that Vector would add. If true, Vector will not add the new tag if the scraped metric has the tag already. If false, Vector will rename the conflicting tag by adding exported_ to it. This matches Prometheus’s honor_labels configuration.

default: false

instance_tag

common optional string literal

The tag name added to each event representing the scraped instance’s host:port.

Examples

"instance"

proxy

optional object

Configures an HTTP(S) proxy for Vector to use. By default, the globally configured proxy is used.

proxy.enabled

optional bool

If false the proxy will be disabled.

default: true

proxy.http

optional string literal

The URL to proxy HTTP requests through.

Examples

"http://foo.bar:3128"

proxy.https

optional string literal

The URL to proxy HTTPS requests through.

Examples

"http://foo.bar:3128"

proxy.no_proxy

optional [string]

A list of hosts to avoid proxying. Allowed patterns here include:

Pattern	Example match
Domain names	`example.com` matches requests to `example.com`
Wildcard domains	`.example.com` matches requests to `example.com` and its subdomains
IP addresses	`127.0.0.1` matches requests to 127.0.0.1
CIDR blocks	`192.168.0.0./16` matches requests to any IP addresses in this range
Splat	`*` matches all hosts

scrape_interval_secs

common optional uint

The interval between scrapes, in seconds.

default: 15 (seconds)

tls

optional object

Configures the TLS options for incoming connections.

tls.ca_file

optional string literal

Absolute path to an additional CA certificate file, in DER or PEM format (X.509), or an inline CA certificate in PEM format.

Examples

"/path/to/certificate_authority.crt"

tls.crt_file

optional string literal

Absolute path to a certificate file used to identify this connection, in DER or PEM format (X.509) or PKCS#12, or an inline certificate in PEM format. If this is set and is not a PKCS#12 archive, key_file must also be set.

Examples

"/path/to/host_certificate.crt"

tls.key_file

optional string literal

Absolute path to a private key file used to identify this connection, in DER or PEM format (PKCS#8), or an inline private key in PEM format. If this is set, crt_file must also be set.

Examples

"/path/to/host_certificate.key"

tls.key_pass

optional string literal

Pass phrase used to unlock the encrypted key file. This has no effect unless key_file is set.

Examples

"${KEY_PASS_ENV_VAR}"

"PassWord1"

tls.verify_hostname

optional bool

If true (the default), Vector will validate the configured remote host name against the remote host’s TLS certificate. Do NOT set this to false unless you understand the risks of not verifying the remote hostname.

default: true

Environment variables

HTTPS_PROXY

common optional string literal

The global URL to proxy HTTPS requests through.

If another HTTPS proxy is set in the configuration file or at a component level, this one will be overridden.

The lowercase variant has priority over the uppercase one.

Examples

http://foo.bar:3128

HTTP_PROXY

common optional string literal

The global URL to proxy HTTP requests through.

If another HTTP proxy is set in the configuration file or at a component level, this one will be overridden.

The lowercase variant has priority over the uppercase one.

Examples

http://foo.bar:3128

NO_PROXY

common optional string literal

List of hosts to avoid proxying globally.

Allowed patterns here include:

Pattern	Example match
Domain names	`example.com` matches requests to `example.com`
Wildcard domains	`.example.come` matches requests to `example.com` and its subdomains
IP addresses	`127.0.0.1` matches requests to `127.0.0.1`
CIDR blocks	`192.168.0.0./16` matches requests to any IP addresses in this range
Splat	`*` matches all hosts

If another no_proxy value is set in the configuration file or at a component level, this one is overridden.

The lowercase variant has priority over the uppercase one.

Examples

localhost,.example.com,192.168.0.0./16

http_proxy

common optional string literal

The global URL to proxy HTTP requests through.

If another HTTP proxy is set in the configuration file or at a component level, this one will be overridden.

The lowercase variant has priority over the uppercase one.

Examples

http://foo.bar:3128

https_proxy

common optional string literal

The global URL to proxy HTTPS requests through.

If another HTTPS proxy is set in the configuration file or at a component level, this one will be overridden.

The lowercase variant has priority over the uppercase one.

Examples

http://foo.bar:3128

no_proxy

common optional string literal

List of hosts to avoid proxying globally.

Allowed patterns here include:

Pattern	Example match
Domain names	`example.com` matches requests to `example.com`
Wildcard domains	`.example.come` matches requests to `example.com` and its subdomains
IP addresses	`127.0.0.1` matches requests to `127.0.0.1`
CIDR blocks	`192.168.0.0./16` matches requests to any IP addresses in this range
Splat	`*` matches all hosts

If another no_proxy value is set in the configuration file or at a component level, this one is overridden.

The lowercase variant has priority over the uppercase one.

Examples

localhost,.example.com,192.168.0.0./16

Output

Metrics

counter

A single value that can be incremented or reset to a zero value but not decremented.

* optional

Any tags present on the metric.

endpoint optional

Any endpoint of the scraped instance. Only present if endpoint_tag is set.

instance optional

The host:port of the scraped instance. Only present if instance_tag is set.

gauge

A gauge represents a point-in-time value that can increase and decrease. Vector’s internal gauge type represents changes to that value. Gauges should be used to track fluctuations in values, like current memory or CPU usage.

* optional

Any tags present on the metric.

endpoint optional

Any endpoint of the scraped instance. Only present if endpoint_tag is set.

instance optional

The host:port of the scraped instance. Only present if instance_tag is set.

histogram

gauge

Also called a timer. A histogram samples observations (usually things like request durations or response sizes) and counts them in configurable buckets. It also provides a sum of all observed values.

* optional

Any tags present on the metric.

endpoint optional

Any endpoint of the scraped instance. Only present if endpoint_tag is set.

instance optional

The host:port of the scraped instance. Only present if instance_tag is set.

summary

gauge

Similar to a histogram, a summary samples observations (usually things like request durations and response sizes). While it also provides a total count of observations and a sum of all observed values, it calculates configurable quantiles over a sliding time window.

* optional

Any tags present on the metric.

endpoint optional

Any endpoint of the scraped instance. Only present if endpoint_tag is set.

instance optional

The host:port of the scraped instance. Only present if instance_tag is set.

Telemetry

Metrics

link

component_received_events_total

counter

The number of events accepted by this component either from tagged origins like file and uri, or cumulatively from other origins.

component_id required

The Vector component ID.

component_kind required

The Vector component kind.

component_name required

Deprecated, use component_id instead. The value is the same as component_id.

component_type required

The Vector component type.

container_name optional

The name of the container from which the event originates.

file optional

The file from which the event originates.

host required

The hostname of the system Vector is running on.

mode optional

The connection mode used by the component.

peer_addr optional

The IP from which the event originates.

peer_path optional

The pathname from which the event originates.

pid required

The process ID of the Vector instance.

pod_name optional

The name of the pod from which the event originates.

uri optional

The sanitized URI from which the event originates.

component_sent_event_bytes_total

counter

The total number of event bytes emitted by this component.

component_id required

The Vector component ID.

component_kind required

The Vector component kind.

component_name required

Deprecated, use component_id instead. The value is the same as component_id.

component_type required

The Vector component type.

host required

The hostname of the system Vector is running on.

pid required

The process ID of the Vector instance.

component_sent_events_total

counter

The total number of events emitted by this component.

component_id required

The Vector component ID.

component_kind required

The Vector component kind.

component_name required

Deprecated, use component_id instead. The value is the same as component_id.

component_type required

The Vector component type.

host required

The hostname of the system Vector is running on.

pid required

The process ID of the Vector instance.

events_in_total

counter

The number of events accepted by this component either from tagged origins like file and uri, or cumulatively from other origins. This metric is deprecated and will be removed in a future version. Use component_received_events_total instead.

component_id required

The Vector component ID.

component_kind required

The Vector component kind.

component_name required

Deprecated, use component_id instead. The value is the same as component_id.

component_type required

The Vector component type.

container_name optional

The name of the container from which the event originates.

file optional

The file from which the event originates.

host required

The hostname of the system Vector is running on.

mode optional

The connection mode used by the component.

peer_addr optional

The IP from which the event originates.

peer_path optional

The pathname from which the event originates.

pid required

The process ID of the Vector instance.

pod_name optional

The name of the pod from which the event originates.

uri optional

The sanitized URI from which the event originates.

events_out_total

counter

The total number of events emitted by this component. This metric is deprecated and will be removed in a future version. Use component_sent_events_total instead.

component_id required

The Vector component ID.

component_kind required

The Vector component kind.

component_name required

Deprecated, use component_id instead. The value is the same as component_id.

component_type required

The Vector component type.

host required

The hostname of the system Vector is running on.

pid required

The process ID of the Vector instance.

http_error_response_total

counter

The total number of HTTP error responses for this component.

host required

The hostname of the system Vector is running on.

pid required

The process ID of the Vector instance.

http_request_errors_total

counter

The total number of HTTP request errors for this component.

host required

The hostname of the system Vector is running on.

pid required

The process ID of the Vector instance.

parse_errors_total

counter

The total number of errors parsing metrics for this component.

host required

The hostname of the system Vector is running on.

pid required

The process ID of the Vector instance.

processed_bytes_total

counter

The number of bytes processed by the component.

component_id required

The Vector component ID.

component_kind required

The Vector component kind.

component_name required

Deprecated, use component_id instead. The value is the same as component_id.

component_type required

The Vector component type.

container_name optional

The name of the container from which the bytes originate.

file optional

The file from which the bytes originate.

host required

The hostname of the system Vector is running on.

mode optional

The connection mode used by the component.

peer_addr optional

The IP from which the bytes originate.

peer_path optional

The pathname from which the bytes originate.

pid required

The process ID of the Vector instance.

pod_name optional

The name of the pod from which the bytes originate.

uri optional

The sanitized URI from which the bytes originate.

processed_events_total

counter

The total number of events processed by this component. This metric is deprecated in place of using component_received_events_total and component_sent_events_total metrics.

component_id required

The Vector component ID.

component_kind required

The Vector component kind.

component_name required

Deprecated, use component_id instead. The value is the same as component_id.

component_type required

The Vector component type.

host required

The hostname of the system Vector is running on.

pid required

The process ID of the Vector instance.

request_duration_seconds

histogram

The total request duration in seconds.

host required

The hostname of the system Vector is running on.

pid required

The process ID of the Vector instance.

requests_completed_total

counter

The total number of requests completed by this component.

component_id required

The Vector component ID.

component_kind required

The Vector component kind.

component_name required

Deprecated, use component_id instead. The value is the same as component_id.

component_type required

The Vector component type.

host required

The hostname of the system Vector is running on.

pid required

The process ID of the Vector instance.

How it works

Context

By default, the prometheus_scrape source augments events with helpful context keys.

State

This component is stateless, meaning its behavior is consistent across each input.

Transport Layer Security (TLS)

Vector uses OpenSSL for TLS protocols. You can adjust TLS behavior via the tls.* options.