OpenShift 2

Question 1

Two type of bc triggers

Answer 1

Image change triggers
Webhook triggers

Question 2

How do you view the triggers associated with a build configuration

Answer 2

oc describe bc/name

Question 3

Add an image change trigger to a build

Answer 3

oc set triggers bc/name –from-image=project/image:tag

Question 4

How do you remove an image change trigger from a bc

Answer 4

oc set triggers bc/name –from-image=project/image:tag –remove

Question 5

Add a webhook to a bc

Answer 5

oc set triggers bc/name –from-gitlab

oc set triggers bc/name –from-github

oc set triggers bc/name –from-bitbucket

Question 6

Remove a webhook from a bc

Answer 6

oc set triggers bc/name –from-gitlab –remove

oc set triggers bc/name –from-github –remove

oc set triggers bc/name –from-bitbucket –remove

Question 7

What are the two types of post commit hooks?

Answer 7

Command: A executed using the exec system call.

Shell script: Runs a build hook with the /bin/sh -ic command

Question 8

Create a command post-commit build hook

Answer 8

oc set build-hook bc/name –post-commit \
–command – bundle exec rake test –verbose

Question 9

Create a shell script post-commit build hook

Answer 9

oc set build-hook bc/name –post-commit \
–script=”curl http://api.com/user/${USER}”

Question 10

How do you tell S2I where to find its mandatory scripts (run, assemble)

Answer 10

Set io.openshift.s2i.scripts-url as label in the builder image

Question 11

Ways to customize the s2i script:

Answer 11

1) override the default S2I scripts by providing your own S2I scripts in the .s2i/bin
2) create a wrapper script that invokes the default scripts, and then adds the necessary customization before or after the invocation

Question 12

using skopeo how do you determine the location of the s2i script for rhscl/php-73-rhel7 S2I builder image

Answer 12

skopeo inspect
docker://myregistry.com/rhscl/php-73-rhel7 | grep io.openshift.s2i.scripts-url

Question 13

Command for skafolding s2i builder image

Answer 13

s2i create image_name directory

Question 14

How do yous pecify the maven repo URL when creating an app?

Answer 14

–build-env MAVEN_MIRROR_URL=${URL}

Question 15

How to specify a build env variable?

Answer 15

–build-env ENV_VAR_NAME=VALUE

Do not put a space after the environment variable ENV_VAR_NAME=VALUE. The environment variable follows the NAME=VALUE format.

Question 16

Types of post commit build hookds

Answer 16

1. Command
2. Shell script

Question 17

Set a command as post commit build hook

Answer 17

oc set build-hook bc/name –post-commit –command – bundle exec rake test –verbose

Question 18

Set a post commit build hook using the shell approach

Answer 18

oc set build-hook bc/name –post-commit \ –script=”curl http://api.com/user/${USER}”

Question 19

Start a build called hook and display logs

Answer 19

oc start-build hook -F

Question 20

Where do you put your s2i customizations

Answer 20

In your project under .s2i/bin

Question 21

How do you invoke the s2i run script during customization?

Answer 21

exec /usr/libexec/s2i/run

You must use exec to ensure that the default run script still runs with process ID 1.

Question 22

Create app from template stored in local file

Answer 22

oc new-app –file mytemplate.yaml -p PARAM1=value1

Question 23

Apply values to a template and store the result in a local file

Answer 23

oc process -f mytemplate.yaml -p PARAM1=value1 > myresourcelist.yaml

Question 24

list only parameters defined by a template

Answer 24

oc process -f mytemplate.yaml –parameters

Question 25

Print the list of env variable in a bc

Answer 25

oc set env bc/hook –list