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Planner and the Bloom Builder, where the planner creates tasks for bloom building, and sends the tasks to the builders to process and upload the resulting blocks. Bloom filters are grouped in bloom blocks spanning multiple streams (also known as series) and chunks from a given day. To learn more about how blocks and me... | https://github.com/grafana/loki/blob/main/docs/sources/operations/bloom-filters.md | main | loki | [
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in the Configure section for the [Bloom Gateways][bloom-gateway-cfg]. Refer to the [Enable bloom filters](#enable-bloom-filters) section above for a configuration snippet enabling this feature. ### Gateway sizing and configuration Bloom Gateways use their local file system as a Least Recently Used (LRU) cache for bloom... | https://github.com/grafana/loki/blob/main/docs/sources/operations/bloom-filters.md | main | loki | [
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the following hashes: `hash("foo")`, `hash("foo=bar")`, `hash("c6dj8g" + "foo")` and `hash("c6dj8g" + "foo=bar")`. ## Query sharding Query acceleration does not just happen while processing chunks, but also happens from the query planning phase where the query frontend applies [query sharding](https://lokidex.com/posts... | https://github.com/grafana/loki/blob/main/docs/sources/operations/bloom-filters.md | main | loki | [
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# Enforce rate limits and push request validation Loki will reject requests if they exceed a usage threshold (rate limit error) or if they are invalid (validation error). All occurrences of these errors can be observed using the `loki\_discarded\_samples\_total` and `loki\_discarded\_bytes\_total` metrics. The sections... | https://github.com/grafana/loki/blob/main/docs/sources/operations/request-validation-rate-limits.md | main | loki | [
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is enforced when a tenant reaches their maximum number of active streams. Active streams are held in memory buffers in the ingesters, and if this value becomes sufficiently large then it will cause the ingesters to run out of memory. This value can be modified globally in the [`limits\_config`](/docs/loki//configuratio... | https://github.com/grafana/loki/blob/main/docs/sources/operations/request-validation-rate-limits.md | main | loki | [
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tenant | No | ## `greater\_than\_max\_sample\_age` If the `reject\_old\_samples` config option is set to `true` (it is by default), then samples will be rejected with `reason=greater\_than\_max\_sample\_age` if they are older than the `reject\_old\_samples\_max\_age` value. You should not see samples rejected for `reas... | https://github.com/grafana/loki/blob/main/docs/sources/operations/request-validation-rate-limits.md | main | loki | [
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| Configurable per tenant | Yes | | HTTP status code | `400 Bad Request` | ## `label\_value\_too\_long` If a sample has a label value with a length in bytes greater than Loki has been configured to allow, it will be rejected for the `label\_value\_too\_long` reason. This value can be modified globally in the [`limits\_... | https://github.com/grafana/loki/blob/main/docs/sources/operations/request-validation-rate-limits.md | main | loki | [
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# Manage recording rules Recording rules are queries that run in an interval and produce metrics from logs that can be pushed to a Prometheus compatible backend. Recording rules are evaluated by the `ruler` component. Each `ruler` acts as its own `querier`, in the sense that it executes queries against the store withou... | https://github.com/grafana/loki/blob/main/docs/sources/operations/recording-rules.md | main | loki | [
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Client configuration Remote-write client configuration is fully compatible with [prometheus configuration format](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#remote\_write). ```yaml remote\_write: clients: mimir: url: http://mimir/api/v1/push write\_relabel\_configs: - action: replace targ... | https://github.com/grafana/loki/blob/main/docs/sources/operations/recording-rules.md | main | loki | [
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determine this by alerting on `loki\_ruler\_wal\_appender\_ready < 1`. ### Corrupt WAL If a disk fails or the `ruler` does not terminate correctly, there's a chance one or more tenant WALs can become corrupted. A mechanism exists for automatically repairing the WAL, but this cannot handle every conceivable scenario. In... | https://github.com/grafana/loki/blob/main/docs/sources/operations/recording-rules.md | main | loki | [
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# Manage large volume log streams with automatic stream sharding Automatic stream sharding can keep streams under a `desired\_rate` by adding new labels and values to existing streams. When properly tuned, this can eliminate issues where log producers are rate limited due to the per-stream rate limit. \*\*To enable aut... | https://github.com/grafana/loki/blob/main/docs/sources/operations/automatic-stream-sharding.md | main | loki | [
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are individually reported. - `loki\_rate\_store\_stream\_rate\_bytes`: A histogram of the distribution of stream sizes across all tenants in bytes/second. - `loki\_stream\_sharding\_count`: The total number of times that streams have been sharded. Useful for calculating the sharding rate. | https://github.com/grafana/loki/blob/main/docs/sources/operations/automatic-stream-sharding.md | main | loki | [
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# Troubleshoot Loki operations This guide helps you troubleshoot errors that occur during Loki operations, including configuration issues, storage backend problems, cluster communication failures, and service component errors. These errors are distinct from ingestion (write path) and query (read path) errors covered in... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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the `limits\_config` section or set the command line argument `-validation.allow-structured-metadata=false` and restart Loki. Then proceed to update to schema v13 or newer before re-enabling this config, search for 'Storage Schema' in the docs for the schema update procedure ``` \*\*Cause:\*\* Structured metadata is en... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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target, cannot run backend target with legacy read mode ``` \*\*Cause:\*\* The `backend` target is configured while legacy read mode is enabled. These are incompatible deployment configurations. \*\*Resolution:\*\* - \*\*Disable legacy read mode\*\* if using the `backend` target: ```yaml # Remove or set to false: legac... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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only applies to local filesystem storage. \*\*Resolution:\*\* - \*\*Remove the setting\*\* if using object storage: ```yaml # Remove or set to 0: query\_store\_max\_look\_back\_period: 0 ``` - \*\*Or use filesystem storage\*\* if this setting is needed for local development. \*\*Properties:\*\* - Enforced by: Configura... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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No ### Error: Deletion not available for tenant \*\*Error message:\*\* ```text deletion is not available for this tenant ``` \*\*Cause:\*\* A delete request was submitted for a tenant that does not have deletion enabled. Log deletion must be explicitly enabled per tenant. \*\*Resolution:\*\* - \*\*Enable deletion for t... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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the bucket name as a prefix. This can cause path-style vs virtual-hosted-style URL issues. \*\*Resolution:\*\* - \*\*Remove the bucket name\*\* from the endpoint and configure it separately: ```yaml storage\_config: aws: # Incorrect: # endpoint: my-bucket.s3.amazonaws.com # Correct: endpoint: s3.amazonaws.com bucketnam... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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is not available: ```yaml chunk\_store\_config: chunk\_cache\_config: redis: endpoint: 10.0.0.100:6379 ``` - \*\*Check your DNS configuration\*\* and network settings. \*\*Properties:\*\* - Enforced by: DNS resolution - Retryable: Yes - HTTP status: N/A - Configurable per tenant: No ### Error: Unexpected Redis PING res... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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- s http://compactor:3100/ready ``` - \*\*Verify the compactor address\*\* is correctly configured. Queriers and other components that use the cache generation loader need to reach the compactor: ```yaml compactor: compactor\_address: http://compactor:3100 ``` \*\*Properties:\*\* - Enforced by: Cache generation number ... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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the instance\*\* if tokens are not assigned after startup completes. - \*\*Check KV store connectivity\*\* and health. \*\*Properties:\*\* - Enforced by: Lifecycler readiness check - Retryable: Yes (after tokens are assigned) - HTTP status: 503 Service Unavailable - Configurable per tenant: No ### Error: Error talking ... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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by the [`/ready` health check endpoint](http://localhost:3100/ready) and prevent load balancers from routing traffic to unready instances. ### Error: Application is stopping \*\*Error message:\*\* ```text Application is stopping ``` \*\*Cause:\*\* Loki is shutting down and no longer accepting new requests. This is norm... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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- HTTP status: 503 Service Unavailable - Configurable per tenant: No ### Error: No schedulers connected to frontend worker \*\*Error message:\*\* ```text Query Frontend not ready: not ready: number of schedulers this worker is connected to is 0 ``` \*\*Cause:\*\* The query frontend worker has no active connections to a... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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# 200MB ``` \*\*Properties:\*\* - Enforced by: Distributor push handler - Retryable: No (request must be smaller) - HTTP status: 400 Bad Request - Configurable per tenant: No ## TLS and certificate errors TLS errors occur when Loki or its clients cannot establish secure connections due to certificate issues. ### Error:... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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headless services are configured correctly. \*\*Properties:\*\* - Enforced by: Index gateway client, bloom gateway client DNS discovery loop - Retryable: Yes (DNS may recover) - HTTP status: N/A (connectivity failure) - Configurable per tenant: No ## Scheduler and frontend errors These errors relate to query scheduling... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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- HTTP status: 429 Too Many Requests - Configurable per tenant: Yes ### Error: No frontend address \*\*Error message:\*\* ```text no frontend address ``` \*\*Cause:\*\* The scheduler received a request from a frontend but no frontend address was provided for sending responses back. \*\*Resolution:\*\* - \*\*Check front... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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All chunks in the table have expired - The table was never populated - Data corruption \*\*Resolution:\*\* - \*\*Verify the table should be empty\*\*: ```bash # Check if data exists for the time period logcli query '{job=~".+"}' --from="" --to="" --limit=1 ``` - \*\*If the table is legitimately empty\*\*, manually dele... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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cancel a delete request that is already being processed or has completed processing. \*\*Resolution:\*\* - \*\*Check the status\*\* of the delete request: ```bash curl -s http://compactor:3100/loki/api/v1/delete \ -H "X-Scope-OrgID: my-tenant" | jq ``` - \*\*Submit a new delete request\*\* if you need to delete additio... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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alerting rules must produce vector or scalar results. A plain log-stream expression (one that returns log lines rather than a numeric metric) triggers this error in either rule type. \*\*Resolution:\*\* - \*\*Check the rule expression\*\* returns a vector or scalar: ```yaml # Valid - returns vector: record: my\_metric ... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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configuration field is empty or unset. \*\*Resolution:\*\* - \*\*Configure valid addresses\*\*: ```yaml bloom\_gateway: client: addresses: dns+bloom-gateway:9095 ``` Valid formats: - `dns+hostname:port` - DNS-based discovery - `host1:port,host2:port` - Static list \*\*Properties:\*\* - Enforced by: Configuration valida... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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in parallel and uses a quorum model. If the remaining ingesters meet the minimum success threshold, the overall write succeeds despite this error from a shutting-down ingester. - HTTP status: 500 Internal Server Error - Configurable per tenant: No ### Error: Ingester is stopping or already stopped \*\*Error message:\*\... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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The pattern ingester is configured with a replication factor other than 1. Currently, the pattern ingester only supports a replication factor of 1. \*\*Resolution:\*\* - \*\*Set the replication factor to 1\*\*: ```yaml pattern\_ingester: lifecycler: ring: replication\_factor: 1 ``` \*\*Properties:\*\* - Enforced by: Co... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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(request must be fixed) - HTTP status: 400 Bad Request - Configurable per tenant: No ### Error: Delay for tailing too large \*\*Error message:\*\* ```text delay\_for can't be greater than ``` \*\*Cause:\*\* The `delay\_for` parameter for tailing queries exceeds the maximum allowed value. \*\*Resolution:\*\* - \*\*Reduc... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-operations.md | main | loki | [
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# Troubleshoot log ingestion (WRITE) This guide helps you troubleshoot errors that occur when ingesting logs into Loki and writing logs to storage. When Loki rejects log ingestion requests, it's typically due to exceeding rate limits, violating validation rules, or encountering storage issues. Before you begin, ensure ... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-ingest.md | main | loki | [
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per day of logs you should avoid exceeding 300,000 max global streams per user. {{< /admonition >}} \*\*Properties:\*\* - Enforced by: Ingester - Retryable: Yes - HTTP status: 429 Too Many Requests - Configurable per tenant: Yes ## Validation errors Validation errors occur when log data doesn't meet Loki's requirements... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-ingest.md | main | loki | [
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### Error: `too\_far\_behind` These errors occur when log entries arrive in the wrong chronological order. \*\*Error messages:\*\* - `entry too far behind, entry timestamp is: , oldest acceptable timestamp is: ` \*\*Cause:\*\* Logs are being ingested with timestamps that violate Loki's ordering constraints: - Logs olde... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-ingest.md | main | loki | [
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bytes \*\*Resolution:\*\* \* \*\*Shorten label names\*\* in your log shipping configuration to under the configured limit. You can use abbreviations or shorter descriptive names. \*\*Properties:\*\* - Enforced by: Distributor - Retryable: No - HTTP status: 400 Bad Request - Configurable per tenant: Yes ### Error: `labe... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-ingest.md | main | loki | [
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S3 - Check API keys for cloud storage \* \*\*Monitor storage health\*\*: - Check object storage availability \* \*\*Review storage metrics\*\*: - `loki\_ingester\_chunks\_flushed\_total` - `loki\_ingester\_chunks\_flush\_errors\_total` \* \*\*Increase retries and timeouts\*\*: ```yaml storage\_config: aws: s3: http\_co... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-ingest.md | main | loki | [
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per tenant: No ### Error: Context deadline exceeded \*\*Error message:\*\* `context deadline exceeded` \*\*Cause:\*\* Requests are timing out due to slow response times or network issues. \*\*Default configuration:\*\* - Alloy default timeout: 10 seconds - Loki server timeout: `-server.http-server-write-timeout` (defau... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-ingest.md | main | loki | [
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unavailable (503)` \*\*Cause:\*\* Loki is temporarily unable to handle requests due to high load or maintenance. This can occur when ingesters are unhealthy or the ring is not ready. \*\*Default configuration:\*\* - Ingester ring readiness: Requires minimum healthy ingesters based on replication factor - Distributor: R... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-ingest.md | main | loki | [
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block is lifted) - HTTP status: 260 (custom) or configured status code - Configurable per tenant: Yes ## Troubleshooting workflow Follow this workflow when investigating ingestion issues: \* \*\*Check metrics\*\*: ```promql # See which errors are occurring sum by (reason) (rate(loki\_discarded\_samples\_total[5m])) # I... | https://github.com/grafana/loki/blob/main/docs/sources/operations/troubleshooting/troubleshoot-ingest.md | main | loki | [
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# Ensure query fairness within tenants using actors Loki uses [shuffle sharding](../shuffle-sharding/) to minimize impact across tenants in case of querier failures or misbehaving neighboring tenants. When there are potentially a lot of different actors using the same tenant to query logs, such as users accessing Loki ... | https://github.com/grafana/loki/blob/main/docs/sources/operations/query-fairness/_index.md | main | loki | [
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local queue gets 1/3 and each sub-queue gets 1/3 of their share. As the explained implementation and the header name already suggest, it is possible to enqueue queries several levels deep. To do so, you can construct a path to the sub-queue using the `|` delimiter in the header value, as shown in the following examples... | https://github.com/grafana/loki/blob/main/docs/sources/operations/query-fairness/_index.md | main | loki | [
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# Single binary meta-monitoring Meta monitoring for [monolithic mode](https://grafana.com/docs/loki//get-started/deployment-modes/#monolithic-mode) deployments involves some additional configuration. This approach does not use the Kubernetes Monitoring Helm chart. ## Metrics Configure Alloy or Prometheus to scrape the ... | https://github.com/grafana/loki/blob/main/docs/sources/operations/meta-monitoring/single-binary.md | main | loki | [
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# Deploy Loki meta-monitoring The primary method for collecting and monitoring a Loki cluster is to use the [Kubernetes Monitoring Helm](https://github.com/grafana/k8s-monitoring-helm/) chart. This chart provides a comprehensive monitoring solution for Kubernetes clusters and includes direct integrations for monitoring... | https://github.com/grafana/loki/blob/main/docs/sources/operations/meta-monitoring/deploy.md | main | loki | [
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the necessary configuration. 1. Download the `values.yaml` file from the Kubernetes Monitoring Helm chart repository: ```bash curl -O https://raw.githubusercontent.com/grafana/loki/main/production/helm/meta-monitoring/values.yaml ``` 1. Open the `values.yaml` file in a text editor of your choosing and add the Prometheu... | https://github.com/grafana/loki/blob/main/docs/sources/operations/meta-monitoring/deploy.md | main | loki | [
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# Install dashboards, alerts, and recording rules Loki is instrumented to expose metrics about itself via the `/metrics` endpoint, designed to be scraped by Prometheus. Each Loki release includes a mixin. The Loki mixin provides a set of Grafana dashboards, Prometheus recording rules and alerts for monitoring Loki. To ... | https://github.com/grafana/loki/blob/main/docs/sources/operations/meta-monitoring/mixins.md | main | loki | [
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Loki Monitoring dashboard folder. To view the dashboards in Grafana: 1. Select \*\*Dashboards\*\* in your Grafana instance. 1. Select \*\*Loki Monitoring\*\*, or the folder where you uploaded the imported dashboards. 1. Select any file in the folder to view the dashboard. ### Add alerts and recording rules to Prometheu... | https://github.com/grafana/loki/blob/main/docs/sources/operations/meta-monitoring/mixins.md | main | loki | [
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# Key metrics for monitoring Loki Loki exposes many metrics, and each component behaves differently under load. This page focuses on the highest-signal metrics for detecting negative trends early. {{< admonition type="note" >}} The example queries on this page are PromQL. Run them against the Prometheus-compatible data... | https://github.com/grafana/loki/blob/main/docs/sources/operations/meta-monitoring/metrics.md | main | loki | [
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0.0431... | 0.169455 |
`loki\_objstore\_bucket\_operation\_failures\_total` - `loki\_objstore\_bucket\_operation\_duration\_seconds` Example queries: ```promql sum by (operation) (rate(loki\_objstore\_bucket\_operation\_failures\_total{cluster="$cluster", namespace="$namespace"}[$\_\_rate\_interval])) ``` ```promql histogram\_quantile(0.99, ... | https://github.com/grafana/loki/blob/main/docs/sources/operations/meta-monitoring/metrics.md | main | loki | [
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# Loki meta-monitoring As part of your Loki implementation, you will also want to monitor your Loki cluster. As a best practice, you should collect data about Loki in a separate instance of Loki, Prometheus, and Grafana. For example, send your Loki cluster data to a [Grafana Cloud account](https://grafana.com/products/... | https://github.com/grafana/loki/blob/main/docs/sources/operations/meta-monitoring/_index.md | main | loki | [
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Metric Name | Metric Type | Description | | ---------------------------------- | ----------- | ----------------------------------------------------------------------- | | `loki\_internal\_log\_messages\_total` | Counter | Total number of log messages created by Loki itself. | | `loki\_request\_duration\_seconds` | Hist... | https://github.com/grafana/loki/blob/main/docs/sources/operations/meta-monitoring/_index.md | main | loki | [
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severity or above. Valid levels: [debug, # info, warn, error] # CLI flag: -log.level [log\_level: | default = "info"] ``` | https://github.com/grafana/loki/blob/main/docs/sources/operations/meta-monitoring/_index.md | main | loki | [
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# Log retention Retention in Grafana Loki is achieved through the [Compactor](#compactor). By default the `compactor.retention-enabled` flag is not set, so the logs sent to Loki live forever. {{< admonition type="note" >}} If you have a lifecycle policy configured on the object store, please ensure that it is longer th... | https://github.com/grafana/loki/blob/main/docs/sources/operations/storage/retention.md | main | loki | [
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requires a 24h index period. {{< /admonition >}} `retention\_enabled` should be set to true. Without this, the Compactor will only compact tables. `delete\_request\_store` should be set to configure the store for delete requests. This is required when retention is enabled. `working\_directory` is the directory where ma... | https://github.com/grafana/loki/blob/main/docs/sources/operations/storage/retention.md | main | loki | [
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this tenant the global retention period of `744h`, since there is no override specified. - All tenants except `29` and `30`: - Streams that have the namespace label `dev` will have a retention period of `24h` hours. - Streams except those with the namespace label `dev` will have the retention period of `744h`. {{< admo... | https://github.com/grafana/loki/blob/main/docs/sources/operations/storage/retention.md | main | loki | [
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# Single Store TSDB (tsdb) Starting with Loki v2.8, TSDB is the recommended Loki index. It is heavily inspired by the Prometheus's TSDB [sub-project](https://github.com/prometheus/prometheus/tree/main/tsdb). This new index is more efficient, faster, and more scalable. It also resides in object storage like the boltdb-s... | https://github.com/grafana/loki/blob/main/docs/sources/operations/storage/tsdb.md | main | loki | [
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# Introduction {{< admonition type="caution" >}} Compactor horizontal scaling is an experimental feature. Use it with caution in your production environments. {{< /admonition >}} Grafana Loki saw a major improvement in its operational complexity and cost-effectiveness with the introduction of object-storage-based index... | https://github.com/grafana/loki/blob/main/docs/sources/operations/storage/compactor-horizontal-scaling.md | main | loki | [
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to Job Builder. Also notifies about failed jobs after running out of retries. ### Working of Worker mode Workers connect to the Main Compactor via gRPC to fetch and execute jobs, returning results on the same gRPC stream. It uses `compactor\_grpc\_address` under the [common config](https://grafana.com/docs/loki//config... | https://github.com/grafana/loki/blob/main/docs/sources/operations/storage/compactor-horizontal-scaling.md | main | loki | [
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# Write Ahead Log Ingesters temporarily store data in memory. In the event of a crash, there could be data loss. The Write Ahead Log (WAL) helps fill this gap in reliability. The WAL in Grafana Loki records incoming data and stores it on the local file system in order to guarantee persistence of acknowledged data in th... | https://github.com/grafana/loki/blob/main/docs/sources/operations/storage/wal.md | main | loki | [
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pressure during WAL replays, allowing a WAL many times larger than available memory to be replayed. This is provided to minimize reconciliation time after very bad situations, i.e. an outage, and will likely not impact regular operations/rollouts \_at all\_. We suggest setting this to a high percentage (~75%) of availa... | https://github.com/grafana/loki/blob/main/docs/sources/operations/storage/wal.md | main | loki | [
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on. Much of this stems from immutable fields on the specification. For example, if one wants to start using the WAL with single store Loki and wants separate volume mounts for the WAL and the TSDB, you may see immutability errors when attempting updates the Kubernetes StatefulSets. In this case, try `kubectl -n delete ... | https://github.com/grafana/loki/blob/main/docs/sources/operations/storage/wal.md | main | loki | [
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# Log entry deletion Grafana Loki supports the deletion of log entries from a specified stream. Log entries that fall within a specified time window and match an optional line filter are those that will be deleted. Log entry deletion is supported \_only\_ when TSDB is configured as the index store. The compactor compon... | https://github.com/grafana/loki/blob/main/docs/sources/operations/storage/logs-deletion.md | main | loki | [
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# Manage storage You can read a high level overview of Loki storage [here](https://grafana.com/docs/loki//configure/storage/) Grafana Loki needs to store two different types of data: \*\*chunks\*\* and \*\*indexes\*\*. When using Accelerated Search (experimental), then a third data type is used: \*\*bloom blocks\*\*. L... | https://github.com/grafana/loki/blob/main/docs/sources/operations/storage/_index.md | main | loki | [
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# Filesystem object store The filesystem object store is the easiest to get started with Grafana Loki but there are some pros/cons to this approach. Very simply it stores all the objects (chunks) in the specified directory: ```yaml storage\_config: filesystem: directory: /tmp/loki/ ``` A folder is created for every ten... | https://github.com/grafana/loki/blob/main/docs/sources/operations/storage/filesystem.md | main | loki | [
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# Storage schema To support iterations over the storage layer contents, Loki has a configurable storage schema. The schema is defined to apply over periods of time. A `from` value marks the starting point of that schema. The schema is active until another entry defines a new schema with a new `from` date.  section. {{< /admonition >}} The Loki Deployment UI is a web-based user interface that allo... | https://github.com/grafana/loki/blob/main/docs/sources/operations/loki-ui/_index.md | main | loki | [
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will also include any unique identifiers such as pod hashes or zone information. - \*\*Target\*\*: The target is classifies the type of component the node is. This can be a distributor, ingester, querier, etc. - \*\*Version\*\*: The version of the component. This is based upon the container image tag. - \*\*Build Date\... | https://github.com/grafana/loki/blob/main/docs/sources/operations/loki-ui/_index.md | main | loki | [
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feature is coming soon. {{< /admonition >}} ### Analyze Labels Analyze Labels page allows you to analyze label distribution across your log streams within a given tenant and timerange. This feature is useful for understanding label cardinality. The tool can be broken down into three sections: 1. \*\*Analyze Labels\*\*:... | https://github.com/grafana/loki/blob/main/docs/sources/operations/loki-ui/_index.md | main | loki | [
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# Governance This document describes the rules and governance of the project. It is meant to be followed by all the developers of the project and the Loki community. Common terminology used in this governance document are listed below: - \*\*Team members\*\*: Any members of the private [team mailing list][team]. - \*\*... | https://github.com/grafana/loki/blob/main/docs/sources/community/governance.md | main | loki | [
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- Li Guozhong - [liguozhong](https://github.com/liguozhong) ([Alibaba Cloud](https://alibabacloud.com/)) - Michel Hollands - [michelhollands](https://github.com/michelhollands) ([Grafana Labs](/)) - Owen Diehl - [owen-d](https://github.com/owen-d) ([Grafana Labs](/)) - Periklis Tsirakidis - [periklis](https://github.co... | https://github.com/grafana/loki/blob/main/docs/sources/community/governance.md | main | loki | [
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limited to [team members](#team-members). ### Consensus The default decision making mechanism for the Loki project is [rough][rough] consensus. This means that any decision on technical issues is considered supported by the [team][team] as long as nobody objects or the objection has been considered but not necessarily ... | https://github.com/grafana/loki/blob/main/docs/sources/community/governance.md | main | loki | [
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team membership. - added to the projects with commit rights. - added to the [team mailing list][team]. ### Offboarding The ex-member is - removed from the list of [team members](#team-members). Ideally by sending a PR of their own, at least approving said PR. In case of forced removal, no approval is needed. - removed ... | https://github.com/grafana/loki/blob/main/docs/sources/community/governance.md | main | loki | [
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# Contacting the Loki Team For questions regarding Loki: - Ask a question in the `#loki` channel of our [Slack](https://slack.grafana.com/) community - Open source Loki users are welcome to post technical questions on the Grafana Labs Community Forums under the Grafana Loki category at [community.grafana.com](https://c... | https://github.com/grafana/loki/blob/main/docs/sources/community/getting-in-touch.md | main | loki | [
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# Contributing to Loki For the full contribution guide, see [CONTRIBUTING.md](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) in the root of the repository. ## Building Clone the repository and use `make` to build: ```bash git clone https://github.com/grafana/loki.git cd loki ``` | Command | Output | |---|--... | https://github.com/grafana/loki/blob/main/docs/sources/community/contributing.md | main | loki | [
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# XXXX: Template > \_NOTE: the file should be named `\_DRAFT\_.md` and be placed in the `docs/sources/lids` directory. Once accepted, it will be assigned a LID number and the file will be renamed by the sponsor. > \*\*Remove this section before submitting, and retain the structure of this document.\*\*\_ \*\*Author:\*\... | https://github.com/grafana/loki/blob/main/docs/sources/community/lids/template.md | main | loki | [
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# 0002: Remote Rule Evaluation \*\*Author:\*\* Danny Kopping (danny.kopping@grafana.com) \*\*Date:\*\* 01/2023 \*\*Sponsor(s):\*\* @dannykopping \*\*Type:\*\* Feature \*\*Status:\*\* Accepted \*\*Related issues/PRs:\*\* https://github.com/grafana/mimir/pull/1536 \*\*Thread from [mailing list](https://groups.google.com/... | https://github.com/grafana/loki/blob/main/docs/sources/community/lids/0002-RemoteRuleEvaluation.md | main | loki | [
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groups have more expensive queries than others. Another consequence of this is that rule groups execute sequentially, so expensive queries can cause subsequent rules in the group to be delayed or even missed. Rule groups are evaluated concurrently. Rule-based sharding distributes rules evenly across all available `rule... | https://github.com/grafana/loki/blob/main/docs/sources/community/lids/0002-RemoteRuleEvaluation.md | main | loki | [
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# 0006: Expose Split Logic in API \*\*Author:\*\* Karsten Jeschkies (karsten.jeschkies@grafana.com) \*\*Date:\*\* 03/2025 \*\*Sponsor(s):\*\* @trevorwhitney \*\*Type:\*\* API \*\*Status:\*\* Review \*\*Related issues/PRs:\*\* N/A \*\*Thread from [mailing list](https://groups.google.com/forum/#!forum/lokiproject):\*\* N... | https://github.com/grafana/loki/blob/main/docs/sources/community/lids/0006-api-expose-split.md | main | loki | [
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- Arrow Flight RPC assumes the data is being queried on the first request. Which means all shards are available at the same time. However, the intent of this document is that shards can be queried independently. | https://github.com/grafana/loki/blob/main/docs/sources/community/lids/0006-api-expose-split.md | main | loki | [
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# 0005: Loki mixin configuration improvements \*\*Author:\*\* Alexandre Chouinard (Daazku@gmail.com) \*\*Date:\*\* 03/2025 \*\*Sponsor(s):\*\* N/A \*\*Type:\*\* Feature \*\*Status:\*\* Draft \*\*Related issues/PRs:\*\* - [Issue #15881](https://github.com/grafana/loki/issues/15881) - [Issue #13631](https://github.com/gr... | https://github.com/grafana/loki/blob/main/docs/sources/community/lids/0005-loki-mixin-configuration-improvements.md | main | loki | [
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# 0004: Index Gateway Sharding \*\*Author:\*\* Christian Haudum (christian.haudum@grafana.com) \*\*Date:\*\* 02/2023 \*\*Sponsor(s):\*\* @chaudum @owen-d \*\*Type:\*\* Feature \*\*Status:\*\* Rejected / Not Implemented \*\*Related issues/PRs:\*\* \*\*Thread from [mailing list](https://groups.google.com/forum/#!forum/lo... | https://github.com/grafana/loki/blob/main/docs/sources/community/lids/0004-IndexGatewaySharding.md | main | loki | [
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allows to utilize a certain amount of `n` instances. The amount of shards can be implemented as a per-tenant override setting. This would allow to use different amount of instances for each tenant. However, this approach results in non-deterministic hash keys. ### Proposal 3: Shard by index files In order to answer req... | https://github.com/grafana/loki/blob/main/docs/sources/community/lids/0004-IndexGatewaySharding.md | main | loki | [
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# 0003: Query fairness across users within tenants \*\*Author:\*\* Christian Haudum () \*\*Date:\*\* 02/2023 \*\*Sponsor(s):\*\* @chaudum @owen-d \*\*Type:\*\* Feature \*\*Status:\*\* Accepted \*\*Related issues/PRs:\*\* \*\*Thread from [mailing list](https://groups.google.com/forum/#!forum/lokiproject):\*\* --- ## Bac... | https://github.com/grafana/loki/blob/main/docs/sources/community/lids/0003-QueryFairnessInScheduler.md | main | loki | [
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(that does not exist yet in Loki) leaks into the scheduler domain. \*\*Pros:\*\* \* Relatively simple to to implement \*\*Cons:\*\* \* Not extensible \* Leaks domain knowledge ### Proposal 2: Fully hierarchical scheduler This proposal is similar to \_Proposal 1\_, but with the difference that there are no fixed levels ... | https://github.com/grafana/loki/blob/main/docs/sources/community/lids/0003-QueryFairnessInScheduler.md | main | loki | [
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# 0001: Introducing LIDs \*\*Author:\*\* Danny Kopping (danny.kopping@grafana.com) \*\*Date:\*\* 01/2023 \*\*Sponsor(s):\*\* @dannykopping \*\*Type:\*\* Process \*\*Status:\*\* Accepted \*\*Related issues/PRs:\*\* N/A \*\*Thread from [mailing list](https://groups.google.com/forum/#!forum/lokiproject):\*\* N/A --- ## Ba... | https://github.com/grafana/loki/blob/main/docs/sources/community/lids/0001-Introduction.md | main | loki | [
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# Loki Improvement Documents (LIDs) ## Purpose Loki Improvement Documents (\_LIDs\_) are proposals for modifying Grafana Loki's feature-set and/or processes. These documents serve to promote engagement between the community and maintainers \_before\_ making large changes to Grafana Loki. This ensures that we will only ... | https://github.com/grafana/loki/blob/main/docs/sources/community/lids/_index.md | main | loki | [
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# Releasing Loki Build Image The [`loki-build-image`](https://github.com/grafana/loki/blob/main/loki-build-image) is the Docker image used to run tests and build Grafana Loki binaries in CI. The build and publish process of the image is triggered upon a merge to `main` if any changes were made in the folder `./loki-bui... | https://github.com/grafana/loki/blob/main/docs/sources/community/maintaining/release-loki-build-image.md | main | loki | [
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# Prepare Upgrade guide The upgrade guide records changes that require user attention or interaction to upgrade to specific Loki version from previous versions. ## Before you begin The upgrade guide in Grafana Loki works as follows. We have a `setup/upgrade/\_index.md` file that records upgrade information for all Loki... | https://github.com/grafana/loki/blob/main/docs/sources/community/maintaining/release/prepare-upgrade-guide.md | main | loki | [
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# Prepare Release Releasing Grafana Loki consists of merging a long-running release PR. Two workflows keep these PRs up to date, one for patch releases (which runs on commits to branches matching `release-[0-9]+.[0-9]+.x`) and one for minor releases (which runs on commits to branches matching `k[0-9]+`). These pipeline... | https://github.com/grafana/loki/blob/main/docs/sources/community/maintaining/release/prepare-release.md | main | loki | [
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# Merge Release PR To release Loki, merge the release PR. This PR will have the title `chore(): release `. Here's what the 3.0 release PR looked like.  3.0 was the first major release using this new process, and enforcing conventional commits was relatively new. Going forward the r... | https://github.com/grafana/loki/blob/main/docs/sources/community/maintaining/release/merge-release-pr.md | main | loki | [
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# Backport commits Any PRs or commits not on the release branch that you want to include in the release must be backported to the release branch. ## Before you begin 1. Determine the [VERSION\_PREFIX](../concepts/version/). 2. If the release branch already has all the code changes on it, skip this step. ## Steps 1. Pic... | https://github.com/grafana/loki/blob/main/docs/sources/community/maintaining/release/backport-commits.md | main | loki | [
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