Docker is a set of platform as a service (PaaS) products that use OS-level virtualization to deliver software in packages called containers.
Containers are isolated from one another and bundle their own software, libraries and configuration files; they can communicate with each other through well-defined channels. All containers are run by a single operating system kernel and therefore use fewer resources than virtual machines.
 

Docker Review

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25 Questions

1. Format of src for volume/??

docker exec -it /bin/bashDockerfile, 'docker build'for volume give or none if anonymous ;Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you want

2. Other than setting root mysql pwd, how do you set up Mysql container?

Dockerfile, 'docker build'docker exec -it /bin/bashfor volume give or none if anonymous ;Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you want

3. requirements to build a new docker image?

for volume give or none if anonymous ;Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantDockerfile, 'docker build'docker exec -it /bin/bash

4. cmd to run bash in a running container?

docker exec -it /bin/bashfor volume give or none if anonymous ;Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantDockerfile, 'docker build'

5. Root setions in compose file?

for volume give or none if anonymous ;Dockerfile, 'docker build'networks, services, volumes, containers, build,Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you want

6. concept behind host networking?

Dockerfile, 'docker build'Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantContainer listens on 8008, host listens on 8008 too.for volume give or none if anonymous ;

7. Add files to container via Dockerfile?

Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantfor volume give or none if anonymous ;ADD . /thingDockerfile, 'docker build'

8. docker-swarm cmd to create 5 containers for a service?

Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantd-s --replicas 5 -p ?:? --name websvc for volume give or none if anonymous ;Dockerfile, 'docker build'

9. Dockerfile format?

Dockerfile, 'docker build'for volume give or none if anonymous ;FROM MAINTAINER other bits...Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you want

10. option to run docker not interactive?

Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantfor volume give or none if anonymous ;-d (detached)Dockerfile, 'docker build'

11. steps to set up a swarm?

for volume give or none if anonymous ;docker swarm init --advertise-addr ; use output cmd to add workers (IP:2377)Dockerfile, 'docker build'Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you want

12. ratio of containers : hosts

for volume give or none if anonymous ;Dockerfile, 'docker build'Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantno contraints - can have several containers of same image running on same host, d works out networking (overlay)

13. cmd to up copies of image in swam?

Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantdocker service scale web=8for volume give or none if anonymous ;Dockerfile, 'docker build'

14. How to set up own docker hub?

Dockerfile, 'docker build'for volume give or none if anonymous ;Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantinstall a container based on docker registry

15. To create a swarm?

Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantDockerfile, 'docker build'for volume give or none if anonymous ;d swarm init --advertised-address - gives a token

16. rolling update of swarm?

d svc update --image : for volume give or none if anonymous ;Dockerfile, 'docker build'Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you want

17. How to commit an image to a registry/hub?

Dockerfile, 'docker build'for volume give or none if anonymous ;Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantd pull nginx ; d tag nginx registry:8080/nginx ; d push registry:8080/nginx

18. swarm build process

Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantfor volume give or none if anonymous ;Define images to provide services in Dockerfiles ; define system in d-c.yml ; build it.Dockerfile, 'docker build'

19. To drain a swarm host?

Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantfor volume give or none if anonymous ;docker node --availability drainDockerfile, 'docker build'

20. UCP is what?

for volume give or none if anonymous ;Universal control plane - Docker EEEnv vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantDockerfile, 'docker build'

21. what is Kubernetes?

Dockerfile, 'docker build'Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantfor volume give or none if anonymous ;Docker orchestrator (so like swarm??)

22. How to use env vars in application.properties files?

${host}Dockerfile, 'docker build'for volume give or none if anonymous ;Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you want

23. how to convert a container into an image?

for volume give or none if anonymous ;Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you wantDockerfile, 'docker build'docker commit /

24. swarm - managers, workers and leaders?

1 leader (one of the managers). Managers are also workersfor volume give or none if anonymous ;Dockerfile, 'docker build'Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you want

25. CNM

Container network modelDockerfile, 'docker build'for volume give or none if anonymous ;Env vars MYSQL_USER, MYSQL_PASSWORD, MYSQL_DATABASE. Database will be stored in /var/lib/msyql, so put a volume there if you want