Tutorial - Docker From Scratch [For Spring Developers] - from Vinoth Selvaraj (Udemy)

1. Docker commands
2. Linux commands cheat sheet

• docker-compose build
• OR
• docker-compose up --build -d

To start only certain service we have several opportunities

1. Use command argument
   • docker-compose up mongo -d - starts only mongo service
2. Use profiles
   • docker-compose up -d - only mongo_stack starts
   • docker-compose --profile=app up -d - additionally starts services with profile app

1. Command line:

   • art-vinsguru-spring-docker\job-service> docker build -t artarkatesoft/art-vinsguru-job-service:multistage -f ./Dockerfile-multistage ./../

2. Docker-compose:

   • art-vinsguru-spring-docker\docker-compose\art-vinsguru-docker> docker-compose --profile=multistage-build build

• mvn spring-boot:build-image

Mockserver dashboard

• http://localhost:1080/mockserver/dashboard

1. Start full stack with elastic cluster
   • docker-compose --profile=app --profile=logging-elk up
2. In case of error in Windows
   • max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
   • use commands for Windows
   • wsl -d docker-desktop
   • sysctl -w vm.max_map_count=262144
   • or permanently add vm.max_map_count = 262144 to /etc/sysctl.conf

1. Start full stack with elastic cluster
   • docker-compose --profile=app --profile=logging-elk up -d
2. View filebeat logs

• Exiting: error loading config file: config file ("filebeat.yml") can only be writable by the owner but the permissions are "-rwxrwxrwx" (to fix the permissions use: 'chmod go-w /usr/share/filebeat/filebeat.yml')
• in Windows we can disable the permission checking by adding:
  • command: filebeat -e -strict.perms=false

3. View logs

• localhost: 5601
• Kibana -> Discover ->
• Create index pattern
  • Your index pattern matches 2 sources.
  • Index pattern name: filebeat*
  • Next step
• Select a primary time field for use with the global time filter.
  • @timestamp
  • Create index pattern
• Kibana -> Discover

• Find a trace

• View dependencies (other microservices)

• Find logs of a request by trace_id in Kibana

1. Add index pattern into Kibana
   • Menu → Management → Stack Management →
   • Index Patterns → Create index pattern → zipkin*
2. Discover zipkin data
   • Discover → Change index pattern → zipkin*
   • by traceId
     • i.e. traceId : "13eb59a6cfc10547" (choose one)