Tag: docker

opensearch docker-compose

version: '3'
services:
  opensearch-node1:
    image: opensearchproject/opensearch:latest
    container_name: opensearch-node1
    environment:
      - discovery.type=single-node
    ulimits:
      memlock:
        soft: -1
        hard: -1
      nofile:
        soft: 65536
        hard: 65536
    volumes:
      - /opt/opensearch:/usr/share/opensearch/data
    ports:
      - 9200:9200
      - 9600:9600
  opensearch-dashboards:
    image: opensearchproject/opensearch-dashboards:latest
    container_name: opensearch-dashboards
    ports:
      - 5601:5601
    expose:
      - "5601"
    environment:
      OPENSEARCH_HOSTS: '["https://opensearch-node1:9200"]'

more : https://opensearch.org/samples/docker-compose.yml

Enable buildkit in docker and use heredoc feature

Why buildkit?
– Better build logs
– Better build cache

Temp enable buildkit

nginx.Dockerfile

# syntax=docker/dockerfile:1.3-labs
FROM nginx

COPY <<EOF /usr/share/nginx/html/index.html
"hola Duniya"
EOF

DOCKER_BUILDKIT=1 docker build -t here-nginx -f nginx.Dockerfile .

Enable buildkit permanently :

echo "{ "features": { "buildkit": true } }" > /etc/docker/daemon.json


systemctl restart docker

More : https://github.com/moby/buildkit

Introduction to heredocs in Dockerfiles

Mount single file in docker

We can use –mount type=bind parameter to mount single file

docker run  -d -p 9090:9090 --mount type=bind,source=/opt/prometheus/prometheus.yml,target=/etc/prometheus/prometheus.yml prom/prometheus:v2.22.0

Using docker-compose file

version: "3.7"    
services:
  prometheus:
    image: prom/prometheus:v2.22.0
    volumes:
      - type: bind
        source: /opt/prometheus/prometheus.yml
        target: /etc/prometheus/prometheus.yml
    ports:
      - 9090:9090

More : https://stackoverflow.com/questions/42248198/how-to-mount-a-single-file-in-a-volume

https://docs.docker.com/storage/bind-mounts/

ELK on docker-compose

version: '2.2'
services:
  elasticsearch:
    image: docker.elastic.co/elasticsearch/elasticsearch:7.12.0
    container_name: elasticsearch
    environment:
      discovery.type: "single-node"
    volumes:
      - /root/elasticsearch:/usr/share/elasticsearch/data
    ports:
      - 9200:9200

  kibana:
    image: docker.elastic.co/kibana/kibana:7.12.0
    container_name: kibana
    environment:
      elasticsearch.hosts: "elasticsearch:9200"
    ports:
      - 5601:5601

Rabbitmq docker-compose

version: '3'
services:
  rabbitmq:
    image: rabbitmq:3-management
    restart: always
    container_name: rabbitmq
    environment:
      TZ: "Asia/Kolkata"
      RABBITMQ_DEFAULT_USER: username
      RABBITMQ_DEFAULT_PASS: password
    volumes:
      - /opt/rabbitmq/data:/var/lib/rabbitmq
    ports:
      - 5671:5671
      - 5672:5672
      - 15672:15672

Docker command :

dodocker run -d -p 5671:5671 -p 5672:5672 -p 15672:15672 -v /opt/rabbitmq/data:/var/lib/rabbitmq -e RABBITMQ_DEFAULT_USER=user -e RABBITMQ_DEFAULT_PASS=password  -e TZ="Asia/Kolkata" --restart unless-stopped rabbitmq:3-management

Sonatype Nexus3 – Docker compose

version: '3'
services:
  jenkins:
    image: sonatype/nexus3:3.29.0
    user: root:root
    restart: always
    container_name: nexus
    environment:
      TZ: "Asia/Kolkata"
    volumes:
      - /opt/nexus-data:/nexus-data
    ports:
      - 8081:8081

Get admin passwords:

docker exec -it nexus bash

find / -iname admin.*

#OR

docker exec -it nexus  cat /nexus-data/admin.password

More : https://hub.docker.com/r/sonatype/nexus3#user-content-persistent-data