snapshot of https://github.com/mattermost/mattermost.git (master, 2026-09-16; blobs > 131072B omitted)

docs/site/static/files/samples/loki/loki-config.yaml

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+# Grafana Loki configuration for Mattermost log aggregation
+# This is a production-ready config for a single-instance deployment
+# colocated with an existing Grafana/Prometheus monitoring server.
+#
+# Install location: /opt/loki/loki-config.yaml
+# Data directory:   /opt/loki/data/
+
+auth_enabled: false
+
+server:
+  http_listen_port: 3100
+  grpc_listen_port: 9095
+  log_level: info
+
+common:
+  instance_addr: 127.0.0.1
+  path_prefix: /opt/loki/data
+  storage:
+    filesystem:
+      chunks_directory: /opt/loki/data/chunks
+      rules_directory: /opt/loki/data/rules
+  replication_factor: 1
+  ring:
+    kvstore:
+      store: inmemory
+
+# ---------------------------------------------------------------------------
+# Retention settings
+# ---------------------------------------------------------------------------
+# Loki requires retention to be specified in hours (h). The default here
+# is 14 days. To change it, update retention_period below.
+#
+# Common values:
+#   336h   = 14 days  (default)
+#   720h   = 30 days
+#   2160h  = 90 days
+#   8760h  = 365 days
+# ---------------------------------------------------------------------------
+limits_config:
+  retention_period: 336h          # 14 days (336 hours) — adjust as needed
+  metric_aggregation_enabled: true
+  allow_structured_metadata: true
+
+compactor:
+  working_directory: /opt/loki/data/compactor
+  compaction_interval: 10m
+  retention_enabled: true         # must be true for retention_period to apply
+  retention_delete_delay: 2h
+  retention_delete_worker_count: 150
+  delete_request_store: filesystem
+
+schema_config:
+  configs:
+    - from: "2024-01-01"
+      store: tsdb
+      object_store: filesystem
+      schema: v13
+      index:
+        prefix: index_
+        period: 24h
+
+query_range:
+  results_cache:
+    cache:
+      embedded_cache:
+        enabled: true
+        max_size_mb: 100
+
+ruler:
+  alertmanager_url: http://localhost:9093
+
+frontend:
+  encoding: protobuf

docs/site/static/files/samples/loki/otel-collector-config-mattermost.yaml

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+# OpenTelemetry Collector configuration for Mattermost log collection
+
+receivers:
+  filelog/mattermost:
+    include: [ /opt/mattermost/logs/mattermost.log ]
+    start_at: beginning
+    operators:
+      - type: json_parser
+
+processors:
+  batch:
+    send_batch_size: 10000
+    timeout: 10s
+
+  resource:
+    attributes:
+      - key: host.name
+        value: "<HOSTNAME>"
+        action: upsert
+      - key: service.instance.id
+        value: "<HOSTNAME>"
+        action: upsert
+      - key: service.name
+        value: "<SERVICE_NAME>"
+        action: upsert
+
+  transform/severity:
+    log_statements:
+      - context: log
+        statements:
+          - set(log.severity_text, log.attributes["level"]) where log.attributes["level"] != nil
+          - set(log.severity_number, 9) where log.attributes["level"] == "info"
+          - set(log.severity_number, 13) where log.attributes["level"] == "warn" or log.attributes["level"] == "warning"
+          - set(log.severity_number, 17) where log.attributes["level"] == "error"
+
+exporters:
+  otlp_http/loki:
+    endpoint: "http://<LOKI_HOST>:3100/otlp"
+    tls:
+      insecure: true
+
+service:
+  telemetry:
+    logs:
+      level: "info"
+  pipelines:
+    logs/mattermost:
+      receivers: [ filelog/mattermost ]
+      processors: [ resource, transform/severity, batch ]
+      exporters: [ otlp_http/loki ]

docs/site/static/files/samples/loki/otel-collector-config-postgres.yaml

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+# OpenTelemetry Collector configuration for PostgreSQL log collection
+
+receivers:
+  filelog/postgres:
+    include: [ /var/log/postgresql/*.json ]
+    start_at: beginning
+    operators:
+      - type: json_parser
+
+processors:
+  batch:
+    send_batch_size: 10000
+    timeout: 10s
+
+  resource:
+    attributes:
+      - key: host.name
+        value: "<HOSTNAME>"
+        action: upsert
+      - key: service.instance.id
+        value: "<HOSTNAME>"
+        action: upsert
+      - key: service.name
+        value: "<SERVICE_NAME>"
+        action: upsert
+
+  transform/severity:
+    log_statements:
+      - context: log
+        statements:
+          - set(log.severity_text, log.attributes["error_severity"]) where log.attributes["error_severity"] != nil
+          - set(log.severity_number, 9) where log.attributes["error_severity"] == "LOG" or log.attributes["error_severity"] == "DETAIL" or log.attributes["error_severity"] == "STATEMENT"
+          - set(log.severity_number, 13) where log.attributes["error_severity"] == "WARNING"
+          - set(log.severity_number, 17) where log.attributes["error_severity"] == "ERROR" or log.attributes["error_severity"] == "FATAL" or log.attributes["error_severity"] == "PANIC"
+
+exporters:
+  otlp_http/loki:
+    endpoint: "http://<LOKI_HOST>:3100/otlp"
+    tls:
+      insecure: true
+
+service:
+  telemetry:
+    logs:
+      level: "info"
+  pipelines:
+    logs/postgres:
+      receivers: [ filelog/postgres ]
+      processors: [ resource, transform/severity, batch ]
+      exporters: [ otlp_http/loki ]