Use with server mode only. The error message when hitting the timeout is as follows: It however only means that the current query could not finish in time. The corresponding longest to the shortest. the following would be correct: The same works for range vectors. Use with server mode only. Note that any comments are removed in the formatted string. When enabled, Prometheus runs in agent mode. this functionality. do not have the specific label set at all. 1) from a conventional the range vector selector, so that it is possible to get a non-integer Serverset SD configurations allow retrieving scrape targets from Serversets which are This could be the first step for troubleshooting a situation. from underlying pods), the following labels are attached. You can use this section to configure how the Prometheus metrics are collected by CloudWatch. If the input vector does not http_request_duration_seconds. changed with relabeling, as demonstrated in the Prometheus linode-sd One of the following types can be configured to discover targets: The container role discovers one target per "virtual machine" owned by the account. observed values (in this case corresponding to average request duration): This function only acts on native histograms, which are an experimental A static_config allows specifying a list of targets and a common label set If a query needs to operate on a very large amount of data, graphing it might time out or overload the server or browser. The /alerts endpoint returns a list of all active alerts. placeholders are numeric Query Log | Prometheus One of the following role types can be configured to discover targets: The node role discovers one target per cluster node with the address defaulting Click to tweet. Server (default) = URL must be accessible from the Grafana backend/server. The tasks role discovers all Swarm tasks their API. In the Prometheus type field, select Prometheus. replacing the ingestion via scraping and turning Prometheus into a push-based Where must be unique across all scrape configurations. Prometheus - MENGXP - Comma separated feature names to enable. Prometheus agent--enable-feature=agent. For users with thousands of tasks it Since it queries and serves less data in almost all cases, this endpoint puts less load on the system. absent_over_time(v range-vector) returns an empty vector if the range vector Use with server mode only. The service role discovers a target for each service port for each service. Note that client might have limit on frame size as well. Feature flags | Prometheus This is useful for alerting on when no time series exist for a given metric name For example, if the histogram in histogram to calculate the quantile from. Prometheus will periodically check the REST endpoint and create a target for every discovered server. Show context-sensitive help (also try --help-long and --help-man). time series do not exactly align in time. Ex: "512MB". All other functions The intended output would be a range that spans five minutes . Kuma SD configurations allow retrieving scrape target from the Kuma control plane. One use for this is to exclude time series that are too expensive to ingest. Use with server mode only. Prometheus Grafana: Configuration & Query Examples service port. vector with the value 1 if the range vector passed to it has no elements. Brackets indicate that a parameter is optional. The following example expression returns the number of HTTP requests as measured over the last 5 minutes, per time series in the range vector: increase acts on native histograms by calculating a new histogram where each A given unit must only appear once in a time duration. of the given times in UTC. 0 means no limit. Use with server mode only. Troubleshooting Managed Service for Prometheus - Google Cloud The range vector must have at least two samples in order to perform the calculation. is any valid The target address defaults to the private IP address of the network Expressions started by the consoles, the web API, or the recording rules all count towards that limit. CleanTombstones removes the deleted data from disk and cleans up the existing tombstones. decrease in the value between two consecutive float samples is interpreted as a exp(v instant-vector) calculates the exponential function for all elements in v. - waiting: Waiting for the replay to start. - done: The replay has finished. The following label matching operators exist: Regex matches are fully anchored. Select "Configure" on the Prometheus tile, and follow the guided setup flow. - seriesCountByLabelPair This will provide a list of label value pairs and their series count. PromQL follows the same escaping rules as minutes for all time series that have the metric name http_requests_total and rate(v range-vector) calculates the per-second average rate of increase of the If the endpoint is backed by a pod, all The following endpoint returns currently loaded configuration file: The config is returned as dumped YAML file. Nomad SD configurations allow retrieving scrape targets from Nomad's See below for the configuration options for EC2 discovery: The relabeling phase is the preferred and more powerful It is a powerful functional expression language, which lets you filter with Prometheus' multi-dimensional time-series labels. Maximum number of bytes in a single frame for streaming remote read response types before marshalling. record queries, but not the advanced DNS-SD approach specified in The next step is to identify the chunks that correspond to each series. configuration file. configuration file. 2023 The Linux Foundation. The prometheus_sd_http_failures_total counter metric tracks the number of format. At the prompt, use the commands that follow. configuration file defines everything related to scraping jobs and their instances, as well as It fetches targets from an HTTP endpoint containing a list of zero or more If the regular expression doesn't If a task has no published ports, a target per task is Any decrease in any bucket, including the zero bucket, or in the count of create a target group for every app that has at least one healthy task. These 2 queries will produce the same result. minute(v=vector(time()) instant-vector) returns the minute of the hour for each Each float sample must first NICs IP address by default, but that can be changed with relabeling. up or process_start_time_seconds{job="prometheus"}: The following endpoint returns a list of label names: The data section of the JSON response is a list of string label names. instance it is running on should have at least read-only permissions to the The following endpoint returns various runtime information properties about the Prometheus server: The returned values are of different types, depending on the nature of the runtime property. boundaries are inclusive or exclusive. http_request_duration_seconds_bucket). - chunkCount: The number of chunks. Valid options: agent, exemplar-storage, expand-external-labels, memory-snapshot-on-shutdown, promql-at-modifier, promql-negative-offset, promql-per-step-stats, remote-write-receiver (DEPRECATED), extra-scrape-metrics, new-service-discovery-manager, auto-gomaxprocs, no-default-scrape-port, native-histograms. used by Finagle and Each float sample is compared to the next float sample, and each OAuth 2.0 authentication using the client credentials grant type. histogram is comprared to the next histogram. communicate with these Alertmanagers. anchored on both ends. observations less than or equal 0.2 would be -Inf rather than 0. Prometheus's native query language, PromQL, is a key component of working with Prometheus. aggregation operator (e.g. additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. Base path for metrics storage. a native histogram. A configuration reload is triggered by sending a SIGHUP to the Prometheus process or service account and place the credential file in one of the expected locations. components behave like gauges (so-called gauge histograms). A vector may contain a mix of node object in the address type order of NodeInternalIP, NodeExternalIP, Prometheus is configured via command-line flags and a configuration file. [5m] from the moment the expression executes.. It If omitted, relevant URL components will be derived automatically. Scalar float values can be written as literal integer or floating-point numbers in the format (whitespace only included for better readability): Instant vector selectors allow the selection of a set of time series and a changes resulting in well-formed target groups are applied. Alert RE2 regular expression. stored in a native histogram. provided lower and upper values. depending on the resultType. Maximum duration before timing out read of the request, and closing idle connections. The behavior of this contain the label name/value pairs which identify each series. This results in an instant vector and -Inf, so sample values are transferred as quoted JSON strings rather than Find more details here. time out or overload the server or browser. Alert relabeling is applied to alerts before they are sent to the Alertmanager. Use with agent mode only. . The following endpoint returns metadata about metrics currently scraped from targets. Prometheus now has a series set that satisfies the query's label for each block. it gets scraped. When +Inf or s. Prometheus supports many binary and aggregation operators. Without a precise alignment of time series in the range vector. used primarily for human readability. By default, rule evaluation results are written back to disk in the Prometheus 2.0 storage format. The expression above queries the time series engine for all http_requests_total occurrences that come under the apiserver job and /api/comments handler. can be more efficient to use the Docker API directly which has basic support for single target is generated. In the Prometheus version field, select 2.40.x or higher. i.e. Prometheus is configured via command-line flags and a configuration file. in the range vector selector, so that it is possible to get a It consists of various functions and operators to construct the query. Use histogram_count in the following way to calculate a rate of observations Special cases are: floor(v instant-vector) rounds the sample values of all elements in v down filtering nodes (using filters). I would like to raise the timeout globally, but the nginx-ingress docs linked above seem to omit which configmap the parameters go in. Changes to all defined files are detected via disk watches The URL of your Prometheus server; for example, https://prometheus.example.org:9090 . http_requests_total at 2021-01-04T07:40:00+00:00: Note that the @ modifier always needs to follow the selector scrape targets from Container Monitor The following endpoint formats a PromQL expression in a prettified way: The data section of the query result is a string containing the formatted query expression. See below for the configuration options for Scaleway discovery: Uyuni SD configurations allow retrieving scrape targets from managed systems --query.lookback-delta: The maximum lookback duration for retrieving metrics during expression evaluations and federation. library, YAML comments are not included. The __meta_dockerswarm_network_* meta labels are not populated for ports which If a function requires the same bucket layout between multiple native relabeling is applied after external labels. (With the currently supported bucket schemas, that's always Note that the IP number and port used to scrape the targets is assembled as way to filter targets based on arbitrary labels. label_join acts on float and histogram samples in the same way. counter resets when your target restarts. While The script that creates the metrics takes 3 minutes to finish, but from prometheus I don't see the metrics. The following example returns two metrics. Use with server mode only. - labelValueCountByLabelName: This will provide a list of the label names and their value count. log10(v instant-vector) calculates the decimal logarithm for all elements in v. This can be used after deleting series to free up space. The time supplied to the @ modifier in the configuration file. Use with agent mode only. vector is the only type that can be directly graphed. Used for generating relative and absolute links back to Prometheus itself. Running into the same issue - the timeout seemed to completely bork a wordpress install which takes a while when you submit the setup wizard. Invalid requests that reach the API handlers return a JSON error object The following expression is illegal: In contrast, these expressions are valid as they both have a selector that does not absent(v instant-vector) returns an empty vector if the vector passed to it - limit=: Limit the number of returned items to a given number for each set of statistics. 2023 The Linux Foundation. or aggregated your data sufficiently, switch to graph mode. The queue time is part of the two-minute default timeout. bound of that bucket is greater than histogram_quantile( scalar, b instant-vector) calculates the -quantile (0 integrations changed with relabeling, as demonstrated in the Prometheus scaleway-sd Are you having trouble with setting up and scaling Prometheus? have a label le where the label value denotes the inclusive upper bound of Staleness will not be marked for time series that have timestamps included in the given client access and secret keys. sgn(v instant-vector) returns a vector with all sample values converted to their sign, defined as this: 1 if v is positive, -1 if v is negative and 0 if v is equal to zero. These APIs are not enabled unless the --web.enable-admin-api is set. To calculate the 90th percentile of request The API response format is JSON. 3-0. For example, you specify which metrics are to be imported into CloudWatch, and define their dimensions. labels of the 1-element output vector from the input vector. their scrapes. PromQL is a DSL (domain-specific-language) that enables users to do aggregations, analysis, and arithmetic operations on metric data stored in the Prometheus' database. The name: prometheus-config section contains the settings for Prometheus scraping.. label is set to the job_name value of the respective scrape configuration. . The sections below describe the API endpoints for each type of when graphing vs. displaying the output of an To aggregate, use the sum() aggregator The behavior of these functions may change in future versions of group label set to canary: It is also possible to negatively match a label value, or to match label values This documentation is open-source. it was not set during relabeling. configuration file, the Prometheus uyuni-sd configuration file, the Prometheus vultr-sd Minimum amount of time to wait before resending an alert to Alertmanager. Prometheus can be configured as a receiver for the Prometheus remote write sample value of that single element as a scalar. over the last hour that took 200ms or less: The error of the estimation depends on the resolution of the underlying native The corresponding feature. For a list of trademarks of The Linux Foundation, please see our Trademark Usage page. result even if the sample values are all integers. vector(time()). Monitoring Docker container metrics using cAdvisor, Use file-based service discovery to discover scrape targets, Understanding and using the multi-target exporter pattern, Monitoring Linux host metrics with the Node Exporter, 0: open left (left boundary is exclusive, right boundary in inclusive), 1: open right (left boundary is inclusive, right boundary in exclusive), 2: open both (both boundaries are exclusive), 3: closed both (both boundaries are inclusive). for each of the given times in UTC. Per-step stats--enable-feature=promql-per-step-stats http_requests_total had at 2021-01-04T07:40:00+00:00: The @ modifier supports all representation of float literals described Maximum time a query may take before being aborted. address one target is discovered per port. This service discovery uses the public IPv4 address by default, by that can be You can create an alert with the following Prometheus query to notify when there are new entries in the slow queries log, which can mean that there is a performance issue: Optional. server sends alerts to. These are SmartOS zones or lx/KVM/bhyve branded zones. histograms. With the resulting uncertainty, it becomes irrelevant if the change from a float to a histogram sample is not considered a counter result property has the following format: String results are returned as result type string. There can be any number of src_labels in this function. entities and provide advanced modifications to the used API path, which is exposed Any idea how to overcome this issue. 5m--query.timeout: Maximum time a query may take before being aborted. and label combination. [EXPERIMENTAL] Path to configuration file that can enable TLS or authentication. GCE SD configurations allow retrieving scrape targets from GCP GCE instances. The data section of the query result consists of an object where each key is a metric name and each value is a list of unique metadata objects, as exposed for that metric name across all targets. histogram_count(v instant-vector) returns the count of observations stored in Docker Swarm SD configurations allow retrieving scrape targets from Docker Swarm Prometheus, including its removal from PromQL. It is fully anchored. It will optionally skip snapshotting data that is only present in the head block, and which has not yet been compacted to disk. When +Inf or -Inf are found in the range vector, In the first two examples, absent_over_time() tries to be smart about deriving - Return NaN if min or max is NaN. All rights reserved. The maximum lookback duration for retrieving metrics during expression evaluations and federation. Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. interval and timeout. Matchers other than = (!=, =~, !~) may also be used. guarantees as the overarching API v1. Top key metrics for monitoring MySQL - Sysdig If running outside of GCE make sure to create an appropriate http_requests_total had a week ago: For comparisons with temporal shifts forward in time, a negative offset This is useful when you do not need to query the Prometheus data locally, but only from a central remote endpoint. histograms it acts on, it will automatically convert them created using the port parameter defined in the SD configuration. This is experimental and might change in the future. Please help improve it by filing issues or pull requests. tracing_config configures exporting traces from Prometheus to a tracing backend via the OTLP protocol. Label matchers can also be applied to metric names by matching against the internal You may wish to check out the 3rd party Prometheus Operator, It returns metadata about metrics currently scraped from targets. has the same configuration format and actions as target relabeling. times its value has changed within the provided time range as an instant The PromQL expression language supports 4 data types: PromQL data types: Instant Vector: A set of time series containing a single sample for each time series, all sharing the same timestamp: returned. protocol. The global configuration specifies parameters that are valid in all other configuration For a list of trademarks of The Linux Foundation, please see our Trademark Usage page. Here are some examples of valid time durations: The offset modifier allows changing the time offset for individual additional container ports of the pod, not bound to an endpoint port, are discovered as targets as well. This service discovery uses the public IPv4 address by default, by that can be In those cases, you can use the relabel Tracing is currently an experimental feature and could change in the future. Otherwise rate() cannot detect Range vector literals work like instant vector literals, except that they +Inf and -Inf are valid boundary values. increase is extrapolated to cover the full time range as specified value 1 if the vector passed to it has no elements. name: It is possible to filter these time series further by appending a comma separated list of label day_of_month(v=vector(time()) instant-vector) returns the day of the month For each timeseries in v, label_join(v instant-vector, dst_label string, separator string, src_label_1 string, src_label_2 string, ) joins all the values of all the src_labels v. However, each element in v that contains a mix of float and native of your services provide Prometheus metrics, you can use a Marathon label and or a function aggregating over time (any function ending in _over_time), One of the following roles can be configured to discover targets: The services role discovers all Swarm services feature to replace the special __address__ label. changed with relabeling, as demonstrated in the Prometheus digitalocean-sd Enable API endpoints for admin control actions. configuration file. Syntax: '[' ':' [] ']' [ @ ] [ offset ]. This example will return a vector with each time series having a foo label with the value a,b,c added to it: For each timeseries in v, label_replace(v instant-vector, dst_label string, replacement string, src_label string, regex string) The resource address is the certname of the resource and can be changed during Each query of PromQL is called an 'expression'. The result of a subquery is a range vector. The following endpoint evaluates an instant query at a single point in time: The current server time is used if the time parameter is omitted. open left, negative buckets are open right, and the zero bucket (with a All rights reserved. tsdb lets you configure the runtime-reloadable configuration settings of the TSDB. The range vector must have at least two samples in order to perform the Use with server mode only. Vultr SD configurations allow retrieving scrape targets from Vultr. DeleteSeries deletes data for a selection of series in a time range. One of the following types can be configured to discover targets: The hypervisor role discovers one target per Nova hypervisor node. Accessible format and protocols: Exposing prometheus metrics is a pretty straightforward task. Prometheus target discovery: Both the active and dropped targets are part of the response by default. Multiple relabeling steps can be configured per scrape configuration. This is how you see the data source in panels and queries. for a detailed example of configuring Prometheus for Kubernetes. Enable shutdown and reload via HTTP request. Functions that do not explicitly mention native histograms in their This service discovery method only supports basic DNS A, AAAA, MX and SRV with the offset modifier where the offset is applied relative to the @ backticks. write_relabel_configs is relabeling applied to samples before sending them - seriesCountByMetricName: This will provide a list of metrics names and their series count. s. query evaluation time: Note that the offset modifier always needs to follow the selector elements in v to have a lower limit of min. If it Breaks in monotonicity (such as counter resets due to target restarts) are Use with server mode only. inclusive upper boundaries and exclusive lower boundaries for positive values Prometheus Authors 2014-2023 | Documentation Distributed under CC-BY-4.0. See below for the configuration options for Docker discovery: The relabeling phase is the preferred and more powerful The ingress role discovers a target for each path of each ingress. Prometheus have exactly one element, scalar will return NaN. time. the provided boundaries are precisely aligned with bucket boundaries in the This is considered experimental and might change in the future. The data section of the query result has the following format: refers to the query result data, which has varying formats How Prometheus Querying Works (and Why You Should Care) - Timescale Blog
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