docker-cplex

IBM ILOG CPLEX deployment with Docker. The demo Java code to use the CPLEX through Concert API Technology. This will end up the embedding use on CPLEX runtime component.

On Local Development

• Download and install IBM ILOG CPLEX Studio
• On macOS: (other platform, adjust the path)

cd src
javac -cp .:/Applications/CPLEX_Studio128/cplex/lib/cplex.jar HelloCplex.java
java -Djava.library.path=/Applications/CPLEX_Studio128/cplex/bin/x86-64_osx -cp .:/Applications/CPLEX_Studio128/cplex/lib/cplex.jar HelloCplex

Press CTRL+C to terminate

• Example output as follow:

Tried aggregator 1 time.
LP Presolve eliminated 1 rows and 3 columns.
All rows and columns eliminated.
Presolve time = 0.00 sec. (0.00 ticks)
Solution is: Optimal
Objective Value: 0.0

Tried aggregator 1 time.
No LP presolve or aggregator reductions.
Presolve time = 0.00 sec. (0.00 ticks)

Iteration log . . .
Iteration:     1   Dual objective     =             0.600000
Solution is: Optimal
Objective Value: 0.6599999999999999

Solutions:
	x: 3.0
	y: 2.0

Reduced cost of x: 0.0
Reduced cost of y: 0.0

Dual of cons01: 0.0017500000000000003
Dual of cons02: -0.0
Dual of cons03: 0.0014999999999999996

On Docker Deployment

Build CPLEX JRE Docker Image

• The docker container image will be Debian based openjdk:8-jre.

• Copy the downloaded CPLEX Linux installer cplex_studio128.linux-x86-64.bin to the same location with cplex/Dockerfile.

  tree cplex
  cplex
  ├── Dockerfile
  ├── cplex_studio128.linux-x86-64.bin
  └── response.properties  
  

• Build the image:

  cd cplex
  docker image build -t cplex:12.8 -t cplex:12.8.0 .
  docker images|grep cplex
  cplex    12.8       3b473e7d9ec3        About a minute ago   3.43GB
  cplex    12.8.0     3b473e7d9ec3        About a minute ago   3.43GB
  

• (Optional) Publish to private docker image registry:

  docker tag cplex:12.8 docker-image-registry.com/namespace/cplex:12.8
  docker tag cplex:12.8.0 docker-image-registry.com/namespace/cplex:12.8.0
  
  docker push docker-image-registry.com/namespace/cplex:12.8
  docker push docker-image-registry.com/namespace/cplex:12.8.0
  

Build Sample Java App

• Make sure to compile the HelloCplex.java. This is on macOS. Otherwise adjust the classpath.

  javac -cp .:/Applications/CPLEX_Studio128/cplex/lib/cplex.jar src/HelloCplex.java
  

• Once ready, build the docker image.

  docker build -t dev_tusk .
  

• Then run the container using the image.

  docker run -it --rm --name tusk dev_tusk
  

• Open another terminal and observe into the container.

  docker images dev_tusk
  docker exec -it tusk bash
  ls -l
  ls -l /opt/ibm/ILOG/CPLEX_Studio128/
  ls -l /opt/ibm/ILOG/CPLEX_Studio128/cplex/lib/
  ls -l /opt/ibm/ILOG/CPLEX_Studio128/cplex/bin/x86-64_linux/
  
  java -Djava.library.path=/opt/ibm/ILOG/CPLEX_Studio128/cplex/bin/x86-64_linux -cp .:/opt/ibm/ILOG/CPLEX_Studio128/cplex/lib/cplex.jar HelloCplex
  
  CTRL+C to terminate
  
  exit
  

• To stop the running container:

  CTRL+C in the container running terminal 
  
  Or from the another terminal, enter:
  
      docker stop tusk
  

• Clean up if desire

  docker rm tusk
  docker rmi dev_tusk