# Name from extracted data to use for the timestamp. Supported values [none, ssl, sasl]. Here are the different set of fields type available and the fields they include : default includes "ClientIP", "ClientRequestHost", "ClientRequestMethod", "ClientRequestURI", "EdgeEndTimestamp", "EdgeResponseBytes", "EdgeRequestHost", "EdgeResponseStatus", "EdgeStartTimestamp", "RayID", minimal includes all default fields and adds "ZoneID", "ClientSSLProtocol", "ClientRequestProtocol", "ClientRequestPath", "ClientRequestUserAgent", "ClientRequestReferer", "EdgeColoCode", "ClientCountry", "CacheCacheStatus", "CacheResponseStatus", "EdgeResponseContentType, extended includes all minimalfields and adds "ClientSSLCipher", "ClientASN", "ClientIPClass", "CacheResponseBytes", "EdgePathingOp", "EdgePathingSrc", "EdgePathingStatus", "ParentRayID", "WorkerCPUTime", "WorkerStatus", "WorkerSubrequest", "WorkerSubrequestCount", "OriginIP", "OriginResponseStatus", "OriginSSLProtocol", "OriginResponseHTTPExpires", "OriginResponseHTTPLastModified", all includes all extended fields and adds "ClientRequestBytes", "ClientSrcPort", "ClientXRequestedWith", "CacheTieredFill", "EdgeResponseCompressionRatio", "EdgeServerIP", "FirewallMatchesSources", "FirewallMatchesActions", "FirewallMatchesRuleIDs", "OriginResponseBytes", "OriginResponseTime", "ClientDeviceType", "WAFFlags", "WAFMatchedVar", "EdgeColoID". Rewriting labels by parsing the log entry should be done with caution, this could increase the cardinality After enough data has been read into memory, or after a timeout, it flushes the logs to Loki as one batch. rev2023.3.3.43278. I've tried the setup of Promtail with Java SpringBoot applications (which generates logs to file in JSON format by Logstash logback encoder) and it works. (default to 2.2.1). Manage Settings Thanks for contributing an answer to Stack Overflow! # Whether Promtail should pass on the timestamp from the incoming gelf message. (configured via pull_range) repeatedly. To download it just run: After this we can unzip the archive and copy the binary into some other location. ), Forwarding the log stream to a log storage solution. on the log entry that will be sent to Loki. # Does not apply to the plaintext endpoint on `/promtail/api/v1/raw`. Asking for help, clarification, or responding to other answers. non-list parameters the value is set to the specified default. By default Promtail fetches logs with the default set of fields. Here the disadvantage is that you rely on a third party, which means that if you change your login platform, you'll have to update your applications. For example: $ echo 'export PATH=$PATH:~/bin' >> ~/.bashrc. If so, how close was it? What am I doing wrong here in the PlotLegends specification? However, this adds further complexity to the pipeline. of streams created by Promtail. By default, the positions file is stored at /var/log/positions.yaml. This is how you can monitor logs of your applications using Grafana Cloud. one stream, likely with a slightly different labels. # log line received that passed the filter. Defines a counter metric whose value only goes up. Am I doing anything wrong? # TrimPrefix, TrimSuffix, and TrimSpace are available as functions. https://www.udemy.com/course/prometheus/?couponCode=EB3123B9535131F1237F promtail-linux-amd64 -dry-run -config.file ~/etc/promtail.yaml. phase. For example: Echo "Welcome to is it observable". in front of Promtail. There is a limit on how many labels can be applied to a log entry, so dont go too wild or you will encounter the following error: You will also notice that there are several different scrape configs. Labels starting with __ (two underscores) are internal labels. You will be asked to generate an API key. Regardless of where you decided to keep this executable, you might want to add it to your PATH. message framing method. YouTube video: How to collect logs in K8s with Loki and Promtail. Connect and share knowledge within a single location that is structured and easy to search. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Docker service discovery allows retrieving targets from a Docker daemon. # the key in the extracted data while the expression will be the value. # Key is REQUIRED and the name for the label that will be created. Defines a histogram metric whose values are bucketed. GELF messages can be sent uncompressed or compressed with either GZIP or ZLIB. Simon Bonello is founder of Chubby Developer. A tag already exists with the provided branch name. This includes locating applications that emit log lines to files that require monitoring. You can also automatically extract data from your logs to expose them as metrics (like Prometheus). Here you can specify where to store data and how to configure the query (timeout, max duration, etc.). The topics is the list of topics Promtail will subscribe to. a configurable LogQL stream selector. It is typically deployed to any machine that requires monitoring. This is really helpful during troubleshooting. His main area of focus is Business Process Automation, Software Technical Architecture and DevOps technologies. You signed in with another tab or window. Offer expires in hours. When you run it, you can see logs arriving in your terminal. Note: priority label is available as both value and keyword. There are no considerable differences to be aware of as shown and discussed in the video. For all targets discovered directly from the endpoints list (those not additionally inferred Prometheus service discovery mechanism is borrowed by Promtail, but it only currently supports static and Kubernetes service discovery. The scrape_configs contains one or more entries which are all executed for each container in each new pod running In additional to normal template. # Additional labels to assign to the logs. with the cluster state. in the instance. your friends and colleagues. # which is a templated string that references the other values and snippets below this key. Only The latest release can always be found on the projects Github page. As of the time of writing this article, the newest version is 2.3.0. # if the targeted value exactly matches the provided string. Promtail will serialize JSON windows events, adding channel and computer labels from the event received. Its value is set to the from scraped targets, see Pipelines. Promtail. That means # paths (/var/log/journal and /run/log/journal) when empty. Pipeline Docs contains detailed documentation of the pipeline stages. They expect to see your pod name in the "name" label, They set a "job" label which is roughly "your namespace/your job name". This can be used to send NDJSON or plaintext logs. usermod -a -G adm promtail Verify that the user is now in the adm group. Each solution focuses on a different aspect of the problem, including log aggregation. Get Promtail binary zip at the release page. # CA certificate used to validate client certificate. # Describes how to transform logs from targets. # entirely and a default value of localhost will be applied by Promtail. (e.g `sticky`, `roundrobin` or `range`), # Optional authentication configuration with Kafka brokers, # Type is authentication type. With that out of the way, we can start setting up log collection. Post implementation we have strayed quit a bit from the config examples, though the pipeline idea was maintained. default if it was not set during relabeling. Example: If your kubernetes pod has a label "name" set to "foobar" then the scrape_configs section The JSON configuration part: https://grafana.com/docs/loki/latest/clients/promtail/stages/json/. # Allow stale Consul results (see https://www.consul.io/api/features/consistency.html). Once Promtail detects that a line was added it will be passed it through a pipeline, which is a set of stages meant to transform each log line. # The quantity of workers that will pull logs. their appearance in the configuration file. labelkeep actions. Discount $9.99 See the pipeline metric docs for more info on creating metrics from log content. Scrape Configs. Each GELF message received will be encoded in JSON as the log line. They read pod logs from under /var/log/pods/$1/*.log. use .*.*. This example reads entries from a systemd journal: This example starts Promtail as a syslog receiver and can accept syslog entries in Promtail over TCP: The example starts Promtail as a Push receiver and will accept logs from other Promtail instances or the Docker Logging Dirver: Please note the job_name must be provided and must be unique between multiple loki_push_api scrape_configs, it will be used to register metrics. users with thousands of services it can be more efficient to use the Consul API The Docker stage parses the contents of logs from Docker containers, and is defined by name with an empty object: The docker stage will match and parse log lines of this format: Automatically extracting the time into the logs timestamp, stream into a label, and log field into the output, this can be very helpful as docker is wrapping your application log in this way and this will unwrap it for further pipeline processing of just the log content. If omitted, all services, # See https://www.consul.io/api/catalog.html#list-nodes-for-service to know more. therefore delays between messages can occur. # or decrement the metric's value by 1 respectively. # Replacement value against which a regex replace is performed if the. You might also want to change the name from promtail-linux-amd64 to simply promtail. Why did Ukraine abstain from the UNHRC vote on China? Now its the time to do a test run, just to see that everything is working. # evaluated as a JMESPath from the source data. However, in some In this instance certain parts of access log are extracted with regex and used as labels. # the label "__syslog_message_sd_example_99999_test" with the value "yes". The gelf block configures a GELF UDP listener allowing users to push # regular expression matches. Promtail also exposes a second endpoint on /promtail/api/v1/raw which expects newline-delimited log lines. Many of the scrape_configs read labels from __meta_kubernetes_* meta-labels, assign them to intermediate labels Ensure that your Promtail user is in the same group that can read the log files listed in your scope configs __path__ setting. Offer expires in hours. It is used only when authentication type is ssl. serverless setups where many ephemeral log sources want to send to Loki, sending to a Promtail instance with use_incoming_timestamp == false can avoid out-of-order errors and avoid having to use high cardinality labels. Add the user promtail into the systemd-journal group, You can stop the Promtail service at any time by typing, Remote access may be possible if your Promtail server has been running. required for the replace, keep, drop, labelmap,labeldrop and Be quick and share with __metrics_path__ labels are set to the scheme and metrics path of the target Here you will find quite nice documentation about entire process: https://grafana.com/docs/loki/latest/clients/promtail/pipelines/. See below for the configuration options for Kubernetes discovery: Where must be endpoints, service, pod, node, or # PollInterval is the interval at which we're looking if new events are available. I like to keep executables and scripts in ~/bin and all related configuration files in ~/etc. If all promtail instances have different consumer groups, then each record will be broadcast to all promtail instances. The nature of simulating nature: A Q&A with IBM Quantum researcher Dr. Jamie We've added a "Necessary cookies only" option to the cookie consent popup. things to read from like files), and all labels have been correctly set, it will begin tailing (continuously reading the logs from targets). It is usually deployed to every machine that has applications needed to be monitored. rsyslog. When using the Agent API, each running Promtail will only get The Docker stage is just a convenience wrapper for this definition: The CRI stage parses the contents of logs from CRI containers, and is defined by name with an empty object: The CRI stage will match and parse log lines of this format: Automatically extracting the time into the logs timestamp, stream into a label, and the remaining message into the output, this can be very helpful as CRI is wrapping your application log in this way and this will unwrap it for further pipeline processing of just the log content. # Label to which the resulting value is written in a replace action. It is usually deployed to every machine that has applications needed to be monitored. Asking someone to prom is almost as old as prom itself, but as the act of asking grows more and more elaborate the phrase "asking someone to prom" is no longer sufficient. Adding contextual information (pod name, namespace, node name, etc. # Whether Promtail should pass on the timestamp from the incoming syslog message. way to filter services or nodes for a service based on arbitrary labels. # Note that `basic_auth` and `authorization` options are mutually exclusive. # The bookmark contains the current position of the target in XML. cspinetta / docker-compose.yml Created 3 years ago Star 7 Fork 1 Code Revisions 1 Stars 7 Forks 1 Embed Download ZIP Promtail example extracting data from json log Raw docker-compose.yml version: "3.6" services: promtail: image: grafana/promtail:1.4. . The configuration is inherited from Prometheus Docker service discovery. These are the local log files and the systemd journal (on AMD64 machines). # The information to access the Consul Agent API. Catalog API would be too slow or resource intensive. It primarily: Discovers targets Attaches labels to log streams Pushes them to the Loki instance.

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