Promtail regex example. Provide details and share your research! But avoid ….

Promtail regex example log files from a directory. My solution is somewhat working, except that it does not handle multiline messages which are split by hitting max_lines. The timestamp format you are using in your config looks bit weird, From the docs it should be one of the following. yaml. It's not a good idea to convert something like response_time to a label due to the great increase in cardinality. For example if requestId is found in the log line as a Any Stage is capable of modifying the labels, extracted data, time, and/or entry, though generally a Stage should only modify one of those things to reduce complexity. HI all, I have logs aggregated at /applogs/hostname/app. for example Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Note: For log filtering, you need to configure Loki and Promtail. Basic Regex Query for Log Filtering. The labeldrop stage would drop the label from being sent to Loki, and it would now be part of the log line instead. bashrc Im trying to extract subject as label from mailbox file. - job_name: kubernetes-audit-log static_configs: - targets: - localhost labels: labeldrop regex: filename logging; label; promtail; Share. slowtime\. Stack Overflow. The geoip stage performs a lookup on the ip and populates the following labels:. It uses the exact Hello, i would like to know how to configure multiline configs via helm or just promtail. by detected fields from grafana. Promtail is a logs collector agent that collects, (re)labels and ships logs to Loki. I don't think the regex is expecially complex I'm trying to sort through amazon ALB logs that contain this line: *https://agent\. For example, all of these are valid: expression: \w* expression: '\w*' expression: "\\w*" But these are not: expression: \\w* (only escape backslashes when using double quotes) But the regex is always not working. Then you need a configuration file for promtail in order to create a job for each file and tell promtail how to parse the log file lines. Is my use case feasible with Promtail? Describe the bug I'm using Loki with Promtail and wanted to add pipeline_stages to redact some sensitive information The patterns should work and when the regex is matched, the replace should work. See example below: You cannot use a plain regex approach like that. Path: Copied! Products Open Source Solutions Learn Docs Company; Downloads Contact us Sign in; Create free account Contact us. Hello 👋 Thanks for any help and feedback in advance 🙂 . I will discuss these points more later in the post. Path: Copied! Examples Using log line. About; Products I decided to rip out the pipeline stages from the Promtail config and apply the regex directly on the Loki query: https: Too many labels leads to issues concerning series cardinality. My block is the following : - job_name: crontab pipeline_stages: - regex: expression: "^Subject: The regex_parser operator parses the string-type field selected by parse_from with the given regular expression pattern. conf Promtail is distributed as a binary, in a Docker container, or there is a Helm chart to install it in a Kubernetes cluster. log entry: {timestamp=2019-10- @bio I thin the year and time is wrong in your custom format. 4. Environment: EKS, Kubernetes v1. Hello, regex. My problem: I don't see any labels in my log entries. Example Configurations. {app="nginx-ingress-microk8s-cont Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I have a promtail and docker compose config and setup that works fine but when i try to I little bit confused, I trying for my POC via Docker, collect and read *. yml Some examples please Did you check the official example : Grafana Labs multiline. Regex Syntax. You can try to assign timestamp if and only if the regex parsed successfully by using a match block (not tested): Unlike most stages, the cri stage provides no configuration options and only supports the specific CRI log format. I have managed to convert the given timestamp into a RFC3339 format. ){3}[0 regex. This example of config promtail based on original docker config and show how work with 2 and more sources: Filename for example: my-docker-config. log files, for example line from log: [2024-05-29T09:06:12. example logs are: 09:59:26 Project configuration field `modules` is deprecated in 0. It is also painful to test regex by continuously stopping and restarting the Promtail daemon (I am not a regex pro in all the flavors of regex that are used today, Loki and Promtail understand Go RE2 regex strings). The metrics stage is an action stage that allows for defining and updating metrics based on data from the extracted map. Provide details and share your research! But avoid . The file is written in YAML format, defined by the schema promtail::to_yaml: A function to convert a hash into yaml for the promtail config; Classes promtail. 18. user3045272. Clone via HTTPS Clone using the web URL. Take a look at the Go documentation. yaml file to filter the log lines that contains the word INFO. I am unable to do LogQL queries based on hostname or any type of query based on facility. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I am using a pattern to add tags to different log fields of my nginx ingress. url: I’m using promtail 2. I am running Grafana Enterprise, Loki & Promtail in Ubuntu 18 Virtual Machine. regex. This stage looks for a time field in the extracted map Hi there, I’m using promtail 2. 1. If all your logs are in different format (which sounds like they are), and regex doesn’t get timestamp from all of them, then when you try to assign timestamp to an empty value it may be problematic. Hi @emilechaiban. 13 and will be removed in 0. (?P<ip>((?:[0-9]{1,3}\. Q: Under what scenario should I use regex in the promtail pipeline if the pattern parser does the same but better, just missing the conceptual part (s)? Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. 0. Schema I was able to get this working using positive lookahead with the following regex, but it throws an error in Promtail. file flag at the command line. yaml) which contains information on the Promtail server, where Hope it helps. Parse the field message with a regular expression. I have read the docs for promtail and doing pipelines and I cannot make heads nor tails of it. Commented Mar 29, 2021 at 15:01. But the regex is always not working. grpc_listen_port: 0. LGTM+ Stack. cri: Extract data by parsing the log line Because of how YAML treats backslashes in double-quoted strings, note that all backslashes in a regex expression must be escaped when using double quotes. I want to filter log lines with labeling using regex. ([^. I tried timestamp stage with location field but it looks like that this field does nothing. The example starts Promtail as a Push receiver and will accept logs from other Promtail instances or the Docker Logging Driver: yaml Copy. so I came up with this pattern to match the other log and drop it ^(?!. keep: Drop targets for which regex does not match the concatenated source_labels. Products. The logfmt parsing stage reads logfmt log lines and extracts the data into labels. Only the static labels are available. Then any combination of other stages follow to use the data in the extracted map. Please use the `scan` field instead. Like in the example above, the __syslog_message_hostname field from the journal was transformed into a label called host through relabel_configs. _stages: - json: expressions: userAgent: userAgent - drop: source: "userAgent" regex: ". 9. Return all log lines for the job varlog {job="varlogs"} In this example you can see the requestId label had a 24653 different values out of 24979 streams it was found in, this is bad!!. In order to get this system attached to Loki my idea is to have a configuration that drops anything per default except lines that match a Regex ruleset. The 'labels' Promtail pipeline stage. You signed out in another tab or window. Examples include promtail Sample of defining within a profile Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Named capture groups in the regex support adding data into the extracted map. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Hello! I am trying to parse some log data created by a command line tool for debugging purposes. A special property _entry will also be used to replace the original log line. Every Grafana Loki release includes binaries for Promtail which can be found on the Releases page as part of the release assets. Assuming value of level is warn. Install the binary. This section is a collection of all stages Promtail supports in a Pipeline. Typical pipelines will start with a regex or json stage to extract data from the log line. *uptimerobot. That means the actual payload (log line) pushed to my qryn You signed in with another tab or window. For the given pipeline: yaml Copy - json: expressions: stream: stream - labels: stream: Given the following log line: match: # LogQL stream selector and line filter expressions. selector: <string> # Names the pipeline. I want to send only the ERROR log. The only thing I found is the drop Stage but this is the opposite I want. If regex does not match, no replacement takes place. Promtail runs as a background service and will monitor the log files and extract any newly appended log entries from those log files. You switched accounts on another tab or window. 000+0300 I currently have a functioning Go RE2 regex pattern that trims a given string by removing skip: do not change the timestamp and keep the time when the log entry has been scraped by Promtail; Examples. Promtail allows you to write powerful and complex pipelines that can transform your logs prior to export to your Loki instances. I want to display some of this data in my Grafana dashboard and for that I am using Promtail to read logs from the file, pre-process it and send it to Loki. Configuring Promtail Promtail is configured in a YAML file (usually referred to as config. What about making the default to “drop” and then when explicitly defining action: we keep those logs. Hello, i would like to know how to configure multiline configs via helm or just promtail. Good Luck The positions file helps Promtail continue reading from where it left off in the case of the Promtail instance restarting. Remove a part of a log in Loki. asked . I tried all combinations, but I am not able to see the labels in Grafana. promtail's main interface. Improve this answer. Hello , I am writing Promtail syslog receiver of (Pfsense)Openvpn logs and normalize them into lables the log line example as follows below including my Promtail config, i managed to get most of my desired data into labels, The 'metrics' Promtail pipeline stage. Add a If you use Loki as your log aggregation system, then you're likely familiar with Promtail, the agent that ships your local logs to a private Grafana instance or Grafana Cloud. Promtail has been configured to use basic In other words, I would like to use a conditional on this variable within regex. This endpoint returns 200 when Promtail is up and running, and there’s at least one working target I want Promtail to discard logs that contain the word "connection". Make sure you are in same dir as The 'labeldrop' Promtail pipeline stage. On the test server, I have set tenant_id before installing and connecting Promtail from the second server, and even stopped that instance alltogether. Whatever the order between regex and multiline, i never succeed to extract the subject or at least to send it to loki from promtail I checked regex on regexp101 with go regexp and it’s working fine. The regex stage parses the log line and ip is extracted. Everything else should be discarded. This is a perfect example of something which should not be a label, requestId should be removed as a label and instead filter expressions should be used to query logs for a specific requestId. *) to catch everything from the source label, and since there is only one group we use the replacement as ${1}-randomtext and use that value to apply it as the value of the given target_label which The 'logfmt' Promtail pipeline stage. Using regex to only return some of the Loki Label values. * You can test it by yourself, it only matches any other line but ERROR. 2: 4048: February 17, 2023 Tinkering with Loki, Promtail, Grafana, Prometheus, Nginx and Dnsmasq - dnsmasq. Learn more about clone URLs Loki uses Promtail to aggregate logs. Share Copy sharable link for this gist. See the instructions here. Where possible, use PromQL label filtering before applying regex, narrowing down the dataset to reduce the regex workload. It uses the exact same service discovery as Prometheus and support similar methods for labeling, transforming, and filtering logs before their ingestion to Loki. Hi! I’m trying to use Pipelines to define a timestamp from logs that are presented in a . Here is a summary of the components of a layout string. I try many configurantions, but don't parse the timestamp or other labels. CRI specifies log lines as space-delimited values with the following components: time: The timestamp string of the log; stream: Either stdout or stderr; flags: CRI flags including F or P; log: The contents of the log line; No whitespace is permitted between the components. yaml) which contains information on the Promtail server, where positions are stored, and how to scrape logs from files. 2] [Third Message 1. Here is the query I use in Loki + referer field to look only the domian request. 1. This is my configuration: This pipeline takes the current value of level and app from the extracted map and a new key output_msg will be added to extracted map with evaluated template. Furthermore, every attempt has finished with my Promtail docker failing to start up :o(The following is the contents of my YAML file. I can view the logs in Loki. 14. Promtail pipeline stages. Attached are the sample log lines and confing info from Promtail. ]+)\. http_listen_port: 9080. I am mounting this NFS volume on my promtail nodes, and using static_config to scrape the file. Promtail features an embedded web server exposing a web console at / and the following API endpoints: GET /ready. 8443515; extra: {"user": "marco"}; The second stage will parse the value of extra from the extracted data as JSON and append the following key-value pairs to the set of extracted data:. Follow edited Sep 21, 2023 at 14:33 . A new key output_msg will be added to extracted map with value warn static_labels only allows adding a static label to the label set, i. See Relabeling for more information. net. # Determines how to parse the time string. For the given pipeline: yaml Copy - logfmt: mapping: timestamp: time app: The 'drop' Promtail pipeline stage. Each combination of labels will create a new log stream and this will fragment the data store. This example pipeline drops any log Promtail is an agent which reads log files and sends streams of log data to the centralised Loki instances along with a set of labels. Install using APT or RPM package manager. Rather, it is using the timestamp where Promtail pushed said log to Loki. *' The middle part is usually a team name like voldort, dev, cryon, etc. You can do dry run as below to verify the promtail config is parsing the labels & timestamp properly. Commented Mar 29, 2021 at 14:36 @WiktorStribiżew is there any workaround for that in Prometheus? – Hidayat Rzayev. The regex stage is a parsing stage that parses a log line using a regular expression. . 7 and I have a specific use case with promtail. All. Grafana Loki. All interactions should be with this class. regex. I’d like to have logs labelled with hostname and app. Configuration File Reference To specify which configuration file to load, pass the --config. It is built specifically for Loki — an instance of Promtail will run on each Kubernetes node. server: When Promtail receives syslog messages, it brings in all header fields, parsed from the received message, prefixed with __syslog_ as internal labels. The promtail module is intended to install and configure Grafana's promtail tool for shipping logs to Loki. Parsing stages: docker: Extract data by parsing the log line using the standard Docker format. In Loki, I want to filter the data based on the parsed values. *" Share. When defined, creates an additional label in # the pipeline_duration_seconds histogram, where the value is # concatenated with job_name using an underscore. But i am not able to parse them in promtail, meaning the labels are not getting generated server: http_listen_port: 9080 Skip to main content Hello Community, I have a legacy system which generates enormous amounts of logs. 110. 132 - - Regex string not start with sub-string for Kubernetes Ingress. But I have to admit that my current For example, a PfSense log, I want to see the full message and then be able to break it down by the various fields <Pass/Block>, Is there a way to grab the log message in promtail so that I could apply the regex strictly to that, or would it have to be applied to the FULL log? system Closed December 4, 2024, 6:34pm The first stage would create the following key-value pairs in the set of extracted data: output: log message\n; stream: stderr; timestamp: 2019-04-30T02:12:41. Prometheus should be configured to scrape Promtail to be able to retrieve the metrics configured by this Hello, i would like to know how to configure multiline configs via helm or just promtail. – Wiktor Stribiżew. I browsed a lot of examples on line, and none of them seem to work when I include it in my Promtail YAML file. I'm having some challenges with coercing my log lines in a certain format. *"} I want to ship logs from promtail to loki and visualize in grafana. Do you mean we need to write a regex for each one to match and then we negate it for the drop? That would typically be very long regex. Objective/Intro I’m trying to achieve multiline logging on a container (docker) based installation (kubernetes cluster) using loki and promtail through helm charts. Log Lines Example: [Test Message 1. The docs have some examples regex | Grafana Loki documentation The second issue you might have is your timestamp doesn’t have time zone info in it, you should explicitly set the time zone in the timestamp stage to make sure The Result: When we want to relabel one of the source the prometheus internal labels, __address__ which will be the given target including the port, then we apply regex: (. e you cannot use the value of other labels. Not covered: Deployment of the Promtail container. Example: http_requests_total{job="nginx", path=~"^/api. What’s the best way to handle path with wildcards? scrape_configs: - I am using log4js to log data to a file in my app. I am new to Promtail. These are my log lines: [DEBUG]: Starting the application [PROCESS]: Trying a division [WARNING]: dividing by zero(0) might I am using this code part in my promtail-config. It may also be common to see the use of match at The log example: 10. API. Configuration: - Promtail. Reload to refresh your session. 9-eks-d1db3c; @adityacs This is a log message for example I had acheived this using grok patterns in logstash, but i’ve no idea how this can be done with promtail or loki. Each element shows by example the formatting of an element of the reference time. Once extracted the log entries will be Hi andrejshapal, sorry for the problem. I can't seem to sort this out and get the behavior that I would like. This operator makes use of Go regular expression. Jellyfin's server Promtail setup looks like following: Install Promtail Binary and Start as a Service LogQL LogQL Table of contents Video Lecture Description Log Stream Selectors Operators Examples Filter Expressions Operators Examples regex does not match; Examples. log I have relabel setup as below, I get “**” as label hostname and “*” as label logname. It extracts all log data and forwards the content to Loki. 10:00:47 ℹ jib → Configuring provider 10:00:47 jib → Provider configured 10:00:47 jib → Provider ready Configuring Promtail Promtail is configured in a YAML file (usually referred to as config. Here is an example of my logs: In the meantime, I have setup another Promtail instance on my other server, which is running nginx reverse proxy and jellyfin media player. *ERROR). For example, if the extracted map contained app with a value of loki, this pipeline would change its value to LOKI. I'd like to define a static label for loki called "hostname" where hostname is a value taken from the log line. Follow answered Feb You signed in with another tab or window. Asking for help, clarification, or responding to other answers. I would like to interpret the time as local timezone. The unpack parser parses a JSON log line, unpacking all embedded labels from Promtail’s pack stage. Regex, Grafana Loki, Promtail: Parsing a timestamp from logs using regex. 2: 4048: February 17, 2023 Loki only displays the first line of multi-line logs, cutting off the remaining lines. this is my promtail configuration scrape_configs: - job_name: system static_configs: - targets: - localhost Describe the bug Given a nginx log with date & time with missing timezone information. Can use # pre-defined formats by name: [ANSIC UnixDate RubyDate RFC822 # RFC822Z RFC850 RFC1123 RFC1123Z RFC3339 RFC3339Nano Unix # UnixMs UnixUs UnixNs]. This is the relevant portion of my promtail conf: I have a probleam to parse a json log with promtail, please, can somebody help me please. However, when parsing it through Promtail, it appears to be parsed but not being used as the displayed timestamp. scrape_configs: - job_name: drupal static_configs: - labels: job: "drupal Help Using Promtail template to change regex detection group to required value . Path: Copied! Products Open Source Solutions Learn Docs Company; Regex match a line. For example, perhaps you want to use a regex to extract your I try to configure a promtail that tails a log where different servers write. NET, Rust. yml Some examples please. I tried the following promtail config, label names are slightly different but with this config the loki data source does not generate the label from regex. Then the extracted ip value is given as source to geoip stage. 3] - [Hi Everyone. Loki uses Promtail to aggregate logs. My objective is to transform the free-form ones to the same logfmt as the others, independent of any other labeling. I made this change only to allow us to be able to use the regex stage in promtail, and this suggestion looked like a way to make it work (at least it works for my use case, but I'm only using regex). Below is the snippet of my Promtail configuration: Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. For example if you are running Promtail in Kubernetes then each container in a single pod will usually I have already 3 Promtails with labels working properly, I tried the same example on this machine which belongs to Skip to main content. The first stage would append the value of thekubernetes_pod_name label into the beginning of the log line. csv file. pipeline_stages: - match: selector: '{env="myenv"}' I have a promtail configuration to scrape all . The 'drop' Promtail pipeline stage. metrics. Promtail has access to the log folder of the host machine. so I came up with this pattern to match the other log and drop it I am using pipeline stages to extract labels from each log line. log. 1] [ 32] [Second Message 1. Schema Promtail is configured in a YAML file (usually referred to as config. filename: /tmp/positions. For example, using | unpack with the log line: json Copy Example with regex and multiple names. I'm running one promtail instance on several log files, of which some are logfmt and others are free-form. Since you already have a relabel_configs section maybe you can generate the OriginId directly from the relabeling step? Something like: - source_labels: ['__journal__machine_id', '__journal__hostname', '__journal_syslog_identifier'] separator: '_' Yes we can use regex to get http code and request time. I have some log examples as shown: event,1107,0deba616-9f81-488f-81c1-af4a01040347,,,,,83cd55a9-95bf-4eb5-a221-af4900c Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Rename a Prometheus label by using a regex against a metric name Hot Network Questions How to make i3 aware of altered PATH configuration set in . Note that created metrics are not pushed to Loki and are instead exposed via Promtail’s /metrics endpoint. user: marco; Using a JMESPath Literal I run this component in docker and mount the user data volume from my openhab docker container into the promtail container (in the /logs folder in promtail container). Read the details here. yaml Copy - timestamp: source: time format: RFC3339Nano. Improve this question. Now it seems that the tpl change creates this conflict with the template stage which itself uses Go template syntax. Examples. Since I may have 10 to 20 hostnames and a dozen of apps, I set _ _ path _ _ to /applogs/**/*. Embed Embed this gist in your website. How much of the example you have shown is constant, and how much is variable from one ocurrence to the next? For example, does every instance start with “sgrvrthf”? Labels are used to index logs in Loki. wseyt gpcl pteb tpleg plrwdjf nxubbi zvmwuiu jojbin wisuegr bpgrgyfs