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Grafana Loki Logs

Log Streaming to Grafana Cloud​

Following the general pattern for log streaming from applications running on CloudFlow, in this guide we give specifics for Grafana Loki.

Obtain the following information from your instance of Grafana Cloud:

Deployment​

The following deployment will run the Fluentd log forwarder in your CloudFlow project, gathering logs from other pods in that same project.

grafana-loki-deployment.yaml
apiVersion: v1
kind: Service
metadata:
  labels:
    app: fluentd
    section.io/logstream-destination: "true"
  name: fluentd
  namespace: default
spec:
  ports:
  - name: fluentdudp
    port: 5160
    protocol: UDP
    targetPort: 5160
  selector:
    app: fluentd
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: fluentd
  namespace: default
  labels:
    app: fluentd
spec:
  replicas: 1
  selector:
    matchLabels:
      app: fluentd
  template:
    metadata:
      labels:
        app: fluentd
        section.io/logstream-collect: "false"
    spec:
      containers:
      - name: fluentd
        image: grafana/fluent-plugin-loki:master
        imagePullPolicy: Always
        resources:
          requests:
            memory: ".5Gi"
            cpu: "500m"
          limits:
            memory: ".5Gi"
            cpu: "500m"
        volumeMounts:
        - name: config
          mountPath: /fluentd/etc/fluent.conf
          readOnly: true
          subPath: fluent.conf
      volumes:
      - name: config
        configMap:
          name: fluent-conf
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: fluent-conf
  namespace: default
data:
  fluent.conf: |-
    <source>
      @type udp
      tag udpsource
      <parse>
        @type json
      </parse>
      port 5160
      message_length_limit 1MB
    </source>


    <match udpsource>
      @type loki
      url GRAFANA_LOGGING_ENDPOINT
      username GRAFANA_METRICS_INSTANCE_ID
      password GRAFANA_API_KEY
      extra_labels {"env":"prod"}
    </match>

Apply the above resources with kubectl apply -f grafana-loki-deployment.yaml into the same project where the pods to be logged are running.

View Logs in Grafana Loki​

Login to your Grafana Cloud account in order to see your logs.