s2i with docker to test images locally
this document explain how to create docker imges to redhad openshift and test images locally whith only docker
Install docker and configure docker for snap.
you need install docker. I have used snap docker for ubuntu20 but each docker daemaon and client shudl be ok
to work with images stream you need to have it in your dockerd and it is necessary have the capacity to pull images from redhad
create user docker and add your user if you want to avoid sudo docker.
docker login registry.redhat.io
this create a file with credentials tokens from user and pwd this file shud be accesible in ~/.docker
In case of snapcraft this file is located inside of snap and you shuld copy it
cp /home/jordi/snap/docker/471/.docker/config.json /home/jordi/.docker/config.json
install s2i
only download from gith and set the executable in the path
create image from git
it is possible and easyest way to create image
s2i build https://github.com/jordiesc/java-springboot-basic registry.redhat.io/redhat-openjdk-18/openjdk18-openshift jordi:v2 INFO Performing Maven build in /tmp/src INFO Using MAVEN_OPTS -XX:+UseParallelOldGC -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=20 -XX:GCTimeRatio=4 -XX:AdaptiveSizePolicyWeight=90 -XX:MaxMetaspaceSize=100m -XX:+ExitOnOutOfMemoryError INFO Using Apache Maven 3.6.1 (Red Hat 3.6.1-6.3) Maven home: /opt/rh/rh-maven36/root/usr/share/maven Java version: 1.8.0_262, vendor: Oracle Corporation, runtime: /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.262.b10-0.el7_8.x86_64/jre Default locale: en_US, platform encoding: ANSI_X3.4-1968 OS name: "linux", version: "5.4.0-48-generic", arch: "amd64", family: "unix" INFO Running 'mvn -e -Popenshift -DskipTests -Dcom.redhat.xpaas.repo.redhatga -Dfabric8.skip=true --batch-mode -Djava.net.preferIPv4Stack=true -s /tmp/artifacts/configuration/settings.xml -Dmaven.repo.local=/tmp/artifacts/m2 package' [INFO] Error stacktraces are turned on. [INFO] Scanning for projects...
to run the container
❯ docker run -p 8080:8080 jordi:v1 Starting the Java application using /opt/jboss/container/java/run/run-java.sh ... INFO exec java -javaagent:/opt/jboss/container/jolokia/jolokia.jar=config=/opt/jboss/container/jolokia/etc/jolokia.properties -XX:+UseParallelOldGC -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=20 -XX:GCTimeRatio=4 -XX:AdaptiveSizePolicyWeight=90 -XX:MaxMetaspaceSize=100m -XX:+ExitOnOutOfMemoryError -cp "." -jar /deployments/rest-service-0.0.1-SNAPSHOT.jar I> No access restrictor found, access to any MBean is allowed Jolokia: Agent started with URL https://172.17.0.2:8778/jolokia/ . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.3.2.RELEASE)
create from source with maven or from binary
you can build from binary o from source code. you must to specify a folder in both cases
❯ cd java-springboot-basic ❯ ll total 36K -rwxrwxr-x 1 jordi jordi 9,9K sep 26 11:22 mvnw -rw-rw-r-- 1 jordi jordi 6,5K sep 26 11:22 mvnw.cmd -rw-rw-r-- 1 jordi jordi 1,4K sep 26 10:13 pom.xml -rw-rw-r-- 1 jordi jordi 406 sep 26 11:34 README.md drwxrwxr-x 4 jordi jordi 4,0K sep 26 10:14 src drwxrwxr-x 9 jordi jordi 4,0K sep 26 11:09 target ❯ s2i build target registry.redhat.io/redhat-openjdk-18/openjdk18-openshift jordi:v6 INFO S2I source build with plain binaries detected INFO Copying binaries from /tmp/src to /deployments ... rest-service-0.0.1-SNAPSHOT.jar rest-service-0.0.1-SNAPSHOT.jar.original classes/ classes/com/ classes/com/example/ classes/com/example/restservice/ classes/com/example/restservice/Greeting.class classes/com/example/restservice/GreetingController.class classes/com/example/restservice/Headers.class classes/com/example/restservice/RestServiceApplication.class generated-sources/ generated-sources/annotations/ generated-test-sources/ generated-test-sources/test-annotations/ maven-archiver/ maven-archiver/pom.properties maven-status/ maven-status/maven-compiler-plugin/ maven-status/maven-compiler-plugin/compile/ maven-status/maven-compiler-plugin/compile/default-compile/ maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst maven-status/maven-compiler-plugin/testCompile/ maven-status/maven-compiler-plugin/testCompile/default-testCompile/ maven-status/maven-compiler-plugin/testCompile/default-testCompile/createdFiles.lst maven-status/maven-compiler-plugin/testCompile/default-testCompile/inputFiles.lst surefire-reports/ surefire-reports/TEST-com.example.restservice.GreetingControllerTests.xml surefire-reports/com.example.restservice.GreetingControllerTests.txt test-classes/ test-classes/com/ test-classes/com/example/ test-classes/com/example/restservice/ test-classes/com/example/restservice/GreetingControllerTests.class Build completed successfully
alternatively
<LeftMouse>❯ cd java-springboot-basic ❯ ll total 36K -rwxrwxr-x 1 jordi jordi 9,9K sep 26 11:22 mvnw -rw-rw-r-- 1 jordi jordi 6,5K sep 26 11:22 mvnw.cmd -rw-rw-r-- 1 jordi jordi 1,4K sep 26 10:13 pom.xml -rw-rw-r-- 1 jordi jordi 406 sep 26 11:34 README.md drwxrwxr-x 4 jordi jordi 4,0K sep 26 10:14 src drwxrwxr-x 9 jordi jordi 4,0K sep 26 11:09 target ❯ cd .. ❯ s2i build java-springboot-basic registry.redhat.io/redhat-openjdk-18/openjdk18-openshift jordi:v5
from Docker file
export a docker file
s2i generate registry.redhat.io/redhat-openjdk-18/openjdk18-openshift Dockerfile.jordi
create a folder and move the Dockerfile.jordi to this folder and rename it to Dockerfile
below a sampel with the only the jar, this docker file also work with source code with maven
❯ cd s2idocker
❯ tree
.
├── Dockerfile
├── s3i.adoc
└── target
└── rest-service-0.0.1-SNAPSHOT.jar
here the docker file
❯ cat Dockerfile
FROM registry.redhat.io/redhat-openjdk-18/openjdk18-openshift
LABEL "io.openshift.s2i.build.image"="registry.redhat.io/redhat-openjdk-18/openjdk18-openshift" \
"io.openshift.s2i.scripts-url"="image:///usr/local/s2i" \
"io.openshift.s2i.destination"="/tmp"
USER root
# Copying in source code
COPY ./target /tmp/src
#COPY /home/jordi/jordi/repositorios/github/sprign-securty-saml/target /tmp/src
# Change file ownership to the assemble user. Builder image must support chown command.
RUN chown -R 1001:0 /tmp/src
USER 1001
# Assemble script sourced from builder image based on user input or image metadata.
# If this file does not exist in the image, the build will fail.
RUN /usr/local/s2i/assemble
# Run script sourced from builder image based on user input or image metadata.
# If this file does not exist in the image, the build will fail.
CMD /usr/local/s2i/run
build the docker file
docker build . -t jordi:v4
test and run image
❯ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
jordi v4 3f13a7f2bbfc 2 minutes ago 539MB
jordi v3 1dbdc19facc1 33 minutes ago 506MB
jordi v2 3d9fbf5de1db 2 hours ago 555MB
<none> <none> 1e244fb4b7a1 2 hours ago 555MB
jordi v1 dd78eb8ca2c9 2 hours ago 555MB
jordi latest a1064a60f7e6 2 hours ago 555MB
registry.redhat.io/redhat-openjdk-18/openjdk18-openshift latest 46b0b4cf8a00 2 months ago 473MB
hello-world latest bf756fb1ae65 8 months ago 13.3kB
❯ docker run -p 8080:8080 -itd jordi:v4
27e11949e11f9ed432a53804f1ef4ec44dcdd39cc03d0ffcba791a3e508f278f
❯ curl -H "name1: value1" -H "name2: value2" http://localhost:8080/headers
{"host":"localhost:8080","name2":"value2","name1":"value1","user-agent":"curl/7.68.0","accept":"*/*"}%
later
the same but directly in okd, this is the normal scenario https://access.redhat.com/documentation/en-us/openshift_online/3/html-single/using_images/index
