elasticsearch:
    image: joshuar/elasticsearch:1.7.0
    volumes:
      - ./config:/opt/elasticsearch/config
      - ./data:/opt/elasticsearch/data
      - ./logs:/opt/elasticsearch/logs
      - ./plugins:/opt/elasticsearch/plugins

elasticsearch:
    image: joshuar/elasticsearch:1.7.1
    volumes:
      - ./config:/opt/elasticsearch/config
      - ./data:/opt/elasticsearch/data
      - ./logs:/opt/elasticsearch/logs
      - ./plugins:/opt/elasticsearch/plugins

Upgrade version of ES in cluster.
Upgrade version of ES in cluster.
