Couchbase

Monitor Couchbase Server — bucket operations, memory usage, disk I/O, and replication — using couchbase-exporter. Track the performance and capacity of your Couchbase clusters in xScaler.

Pattern: couchbase-exporter → Prometheus scrape → xScaler remote_write

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Prerequisites

• Couchbase Server 6.5 or later
• Couchbase admin credentials
• xScaler tenant credentials (token + tenant ID)

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Option A — Prometheus Exporter

Run couchbase-exporter as a Docker container pointed at your Couchbase node:

docker run -d \
  -p 9420:9420 \
  -e CB_HOST=localhost \
  -e CB_USER=admin \
  -e CB_PWD=password \
  blakelead/couchbase-exporter

The exporter listens on port 9420. Configure Prometheus to scrape and remote_write:

scrape_configs:
  - job_name: couchbase
    static_configs:
      - targets: ["localhost:9420"]

remote_write:
  - url: https://euw1-01.m.xscalerlabs.com/api/v1/push
    authorization:
      type: Bearer
      credentials: <token>
    headers:
      X-Scope-OrgID: "<tenant-id>"

Option B — Grafana Alloy

prometheus.scrape "couchbase" {
  targets    = [{"__address__" = "localhost:9420"}]
  forward_to = [prometheus.remote_write.xscaler.receiver]
}

prometheus.remote_write "xscaler" {
  endpoint {
    url = "https://euw1-01.m.xscalerlabs.com/api/v1/push"
    authorization {
      type        = "Bearer"
      credentials = "<token>"
    }
    headers = { "X-Scope-OrgID" = "<tenant-id>" }
  }
}

Option C — OpenTelemetry Collector

receivers:
  couchbase:
    endpoint: http://localhost:8091
    username: admin
    password: password
    collection_interval: 30s

processors:
  batch: {}

exporters:
  otlphttp/xscaler:
    endpoint: https://euw1-01.m.xscalerlabs.com
    headers:
      Authorization: "Bearer <token>"
      X-Scope-OrgID: "<tenant-id>"
    compression: gzip

service:
  pipelines:
    metrics:
      receivers: [couchbase]
      processors: [batch]
      exporters: [otlphttp/xscaler]

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Logs

Collect Couchbase server logs including babysitter, error, and info logs. Add the following to your Alloy config:

local.file_match "couchbase_logs" {
  path_targets = [{
    __address__ = "localhost",
    __path__    = "/opt/couchbase/var/lib/couchbase/logs/*.log",
    instance    = constants.hostname,
    job         = "integrations/couchbase",
  }]
}

loki.source.file "couchbase_logs" {
  targets    = local.file_match.couchbase_logs.targets
  forward_to = [loki.write.xscaler.receiver]
}

loki.write "xscaler" {
  endpoint {
    url = "https://euw1-01.l.xscalerlabs.com/api/v1/logs/push"

    http_client_config {
      authorization {
        type        = "Bearer"
        credentials = env("XSCALER_TOKEN")
      }
    }

    headers = { "X-Scope-OrgID" = env("XSCALER_TENANT_ID") }
  }
}

Key metrics

Metric	Description
couchbase_bucket_op_get_total	Total get (read) operations on each bucket
couchbase_bucket_op_set_total	Total set (write) operations on each bucket
couchbase_bucket_mem_used_bytes	Memory currently used by each bucket
couchbase_bucket_disk_write_queue	Number of items waiting to be persisted to disk
couchbase_node_cpu_utilization_rate	CPU utilisation percentage per Couchbase node
couchbase_cluster_ram_used_bytes	Total RAM used across the entire cluster