Docker and the Database Factory

Transcription

1 Docker and the Database Factory or Absolute Beginning Docker for the Oracle Professional Sean

2 About Me 20+ years Oracle DBA, consultant RAC SIG Board Member IOUG Experience Committee Performance, DR, HA, Automation Ultramarathons, climbing, canyoneering

3 Docker And The Database Factory

4 Docker And The Database Factory

5 containers are not virtual machines! Virtual Machines Containers Hypervisor runs on host Docker engine runs on host Guest OS runs within Hypervisor Containers share host kernel Each VM has its own OS Each container shares OS Hypervisor virtualizes hardware Docker engine virtualizes OS Can use any OS on host Bound to host OS Full OS/binary installs large/heavy Containers often small/light

6 Containers are isolated, but share the OS and, where appropriate, binaries and libraries. The result: significantly faster deployment, lower overhead, easier migration, and faster restart.

7 Argumetents against virtual machines

8 Argumetents against virtual machines

9 Argumetents against virtual machines

10 Argumetents against virtual machines

11 Argumetents against virtual machines

12 Argumetents against virtual machines

13 Argumetents against virtual machines

14 Container Advantages Efficient: Containers share host/kernel resources Speed: Minimal containers provision, load, and start quickly Lightweight: Maximize infrastructure capabilities Lower TCO: Less maintenance, higher app density Transportable: Isolated systems easily moved among hosts

15 Container Advantages On Laptop and Local systems: Great for experimenting! Small footprint, low resource demands are ideal Easier to create and destroy than a native install or VM

16 Why Dockerize Databases? Speed Size Convenience Easy to duplicate Easy to automate Portable

17 Make Your DatabIgs S m a l l e r

18 Easy to Automate and Orchestrate

19 Great for running microservices

20 A Basic Oracle Docker Container Host infrastructure Ports/Networking Host OS Volumes Docker software Oracle container Docker image Database software

21 Downloads Download: Docker: Oracle Docker Images: Oracle Database:

22 Oracle on Docker Install, Step by Step Prepare local system ~/docker ~/oradata (optional if persistence is desired) Copy Docker repo to ~/docker/docker-images-master Install Docker

23 Oracle on Docker Install, Step by Step Copy database zip file to: ~/docker/docker-imagesmaster/oracledatabase/dockerfiles/$db_version Available versions: , , Do not unzip!

24 Oracle on Docker Install, Step by Step

25 Oracle on Docker Install, Step by Step Dockerfile Instructions for creating a Docker image Docker Image Prepared set of files ready to be run as a container Docker Container Runtime product of a Docker image Containers are an instantiation of an image Multiple containers can use the same image Containers don t exist unless running

26 Oracle on Docker Install, Step by Step Build an image: cd ~/docker/docker-imagesmaster/oracledatabase/dockerfiles/./builddockerimage.sh -v e Script creates a name of oracle/database:$version

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32 Oracle on Docker Install, Step by Step Create a simple Docker container docker run --name utoug \ -p 1521:1521 \ oracle/database: ee

33 Demonstration

34 Demonstration

35 Docker is Ephemeral Contents of a container exist as long as the container itself Changes to a container are lost when the container is stopped What?! How is this good for databases?

36 Docker and Persistence Create a simple container with persistence: docker run -dit --name utoug \ -p 1521:1521 -p 5500:5500 \ -v ~/oradata:/opt/oracle/oradata \ oracle/database: ee

37 Docker and Persistence Leverage external volumes to provide persistence Docker creates subdirectories for each container (instance) on the volume: ~/oradata/$container_name ~/oradata/dbconfig/$container_name Multiple databases can be served in this way

38 Docker and Persistence When running a container using a volume, Docker checks for existing data If nothing there creates what it needs Else uses what s there

39 Persistence and Portability Separate instance files on volumes Define volume location Copy volume contents to new host Copy/build image Create container, specifying existing volume/location

40 How Do I...

41 How Do I... Stop and Start a Container docker start docker stop List Running Containers List All Containers docker ps -a Remove a Container docker rm Remove an Image docker ps docker rmi

42 How Do I... Connect with SQL*Developer?

43 How Do I... Run OS/shell commands? docker exec utoug lsnrctl status Run OS/shell commands? docker exec utoug $PATH/$filename.sh [$1...]

44 How Do I... Connect to a container s interactive command line? docker exec -ti utoug bash

45 How Do I... Run SQL*Plus natively on the container? docker exec -ti utoug bash sqlplus

46 How Do I... Change the password? cd ~/docker/docker-imagesmaster/oracledatabase/dockerfiles/ docker exec utoug./setpassword.sh manager

47 How Do I... Create a container for APEX? docker run -dit --name apex \ --network=oracle_network \ -e ORACLE_PWD=manager \ -TZ=America/Denver \ -p 32712:1521 -p 5500:5500 \ -v ~/oradata:/opt/oracle/oradata \ -v ~/docker/apex/5.1.4:/tmp/apex-install \ oracle/database: ee

48 References Maria Colgan: Oracle 12c Now Available on Docker Steven Feuerstein: Getting my Oracle 12c Database Release 2 up and running on Mac via Docker

49 Questions?

50 Thank You! Sean

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