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pgbouncer-docker

A docker container running a configurable pgbouncer. Optimized for running Kubernetes on GKE with Cloud SQL Postgres.

Dockerhub: https://hub.docker.com/r/handshake/pgbouncer/

Configuration

DB_USER

The database username

DB_PASSWORD

The database password

DB_HOST

The IP or host of the database. If using cloud sql proxy, this will most likely be 127.0.0.1.

DB_PORT

The IP or host of the database. If using cloud sql proxy, this will most likely be 5432, or the port you pass into the Cloud SQL command args.

Usage in GKE

To use with GKE, run this container alongside the cloudsql-docker/gce-proxy. Your configuration might look something like below

---
apiVersion: v1
kind: ConfigMap
metadata:
  name: pgbouncer-configs
data:
  DB_HOST: "127.0.0.1"
  DB_PORT: "5432"
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: pgbouncer
  labels:
    tier: database
spec:
  replicas: 1
  minReadySeconds: 20
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1
  template:
    metadata:
      labels:
        tier: database
    spec:
      containers:
        - image: handshake/pgbouncer:0.1.2
          name: pgbouncer
          ports:
            - containerPort: 6432
              protocol: TCP
          envFrom:
            - configMapRef:
                name: pgbouncer-configs
          readinessProbe:
            tcpSocket:
              port: 6432
            initialDelaySeconds: 5
            periodSeconds: 10
          livenessProbe:
            tcpSocket:
              port: 6432
            initialDelaySeconds: 15
            periodSeconds: 20
          resources:
            requests:
              cpu: 100m
              memory: 300m
        - image: gcr.io/cloudsql-docker/gce-proxy:1.11    # Gcloud SQL Proxy
          name: cloudsql-proxy
          command:
            - /cloud_sql_proxy
            - --dir=/cloudsql
            - -instances=$(DATABASE_INSTANCE_NAMES)
            - -credential_file=/secrets/cloudsql_credentials.json
          ports:
            - containerPort: 5432
              protocol: TCP
          volumeMounts:
            - name: cloudsql-credentials
              mountPath: /secrets/cloudsql
              readOnly: true
            - name: cloudsql
              mountPath: /cloudsql
      volumes:
        - name: cloudsql-credentials
          secret:
            secretName: cloudsql-credentials
        - name: cloudsql
          emptyDir:
---
apiVersion: v1
kind: Service
metadata:
  name: pgbouncer-service
spec:
  type: NodePort
  ports:
  - name: pgbouncer-service-port
    protocol: TCP
    port: 6432
    targetPort: 6432
    nodePort: 0
  selector:
    tier: database

Inspiration

This container takes inspiration from https://github.com/heroku/heroku-buildpack-pgbouncer and https://github.com/guizmaii/pgbouncer. Thanks to both!