I'm running a 3 gear env in Openshift using Wildfly cartridges with scaling enabled.
If I run the following command to create a custom env variable, will it be copied when the app is scaled? :
rhc env set <Variable>=<Value> -a App_Name
According to the developer center [1] you don't need to recreate the variable on app restart, so you should be safe for scaling as well, as it is just another spawned gear.
Related
I'm trying to run a containerized app which is stored in Nexus docker hosted on url 12.23.34.55:8086
I'm trying to run it on my Openshift Cluster, but I'm getting error. Commands I'm using to run
oc create secret docker-registry mysecret --docker-server=http://12.23.34.55/ --docker-username=aditya --docker-password=aditya --docker-email=aditya#example.org
oc secrets link default mysecret --for=pull
My nexus is running on http://12.23.34.55:8081
Now I'm using command to launch in OpenShift using below command.
oc new-app 12.23.34.55:8085/mytestapp:11 --insecure-registry=true
as per $ oc new-app myregistry:5000/example/myimage
https://docs.openshift.com/container-platform/4.1/applications/application_life_cycle_management/creating-new-applications.html
But it does not work, it asks for password and not able to deploy from console too, can anyone help me with exact commmand.
Creating the secret is not enough for OpenShift to be able to pull from the registry. You still need to link that secret as well.
Take a look at the official documentation here:
https://docs.openshift.com/container-platform/4.1/openshift_images/managing_images/using-image-pull-secrets.html#images-allow-pods-to-reference-images-from-secure-registries_using-image-pull-secrets
Okay! I found an answer, so using private registry first we should import image using
oc import name url/imagename:tag
then we can create new app with the same
oc new app name
I have installed Kafka on a local Minikube by using the Helm charts https://github.com/confluentinc/cp-helm-charts following these instructions https://docs.confluent.io/current/installation/installing_cp/cp-helm-charts/docs/index.html like so:
helm install -f kafka_config.yaml confluentinc/cp-helm-charts --name kafka-home-delivery --namespace cust360
The kafka_config.yaml is almost identical to the default yaml, with the one exception being that I scaled it down to 1 server/broker instead of 3 (just because I'm trying to conserve resources on my local minikube; hopefully that's not relevant to my problem).
Also running on Minikube is a MySQL instance. Here's the output of kubectl get pods --namespace myNamespace:
I want to connect MySQL and Kafka, using one of the connectors (like Debezium MySQL CDC, for instance). In the instructions, it says:
Install your connector
Use the Confluent Hub client to install this
connector with:
confluent-hub install debezium/debezium-connector-mysql:0.9.2
Sounds good, except 1) I don't know which pod to run this command on, 2) None of the pods seem to have a confluent-hub command available.
Questions:
Does confluent-hub not come installed via those Helm charts?
Do I have to install confluent-hub myself?
If so, which pod do I have to install it on?
Ideally this should be configurable as part of the helm script, but unfortunately it is not as of now. One way to work around this is to build a new Docker from Confluent's Kafka Connect Docker image. Download the connector manually and extract the contents into a folder. Copy the contents of this to a path in the container. Something like below.
Contents of Dockerfile
FROM confluentinc/cp-kafka-connect:5.2.1
COPY <connector-directory> /usr/share/java
/usr/share/java is the default location where Kafka Connect looks for plugins. You could also use different location and provide the new location (plugin.path) during your helm installation.
Build this image and host it somewhere accessible. You will also have to provide/override the image and tag details during the helm installation.
Here is the path to the values.yaml file. You can find the image and plugin.path values here.
Just an add-on to Jegan's comment above: https://stackoverflow.com/a/56049585/6002912
You can choose to do the Dockerfile below. Recommended.
FROM confluentinc/cp-server-connect-operator:5.4.0.0
RUN confluent-hub install --no-prompt debezium/debezium-connector-postgresql:1.0.0
Or you can use a Docker's multi-stage build instead.
FROM confluentinc/cp-server-connect-operator:5.4.0.0
COPY --from=debezium/connect:1.0 \
/kafka/connect/debezium-connector-postgres/ \
/usr/share/confluent-hub-components/debezium-connector-postgres/
This will help you to save time on getting the right jar files for your plugins like debezium-connector-postgres.
From Confluent documentation: https://docs.confluent.io/current/connect/managing/extending.html#create-a-docker-image-containing-c-hub-connectors
The Kafka Connect pod should already have the confluent-hub installed. It is that pod you should run the commands on.
The cp kafka connect pod has 2 containers, one of them is a cp-kafka-connect-server container.That container has confluent-hub installed.You can login into that container and run your connector commands there.To login into that container, run the following command:
kubectl exec -it {pod-name} -c cp-kafka-connect-server -- /bin/bash
As of latest version of chart, this can be achieved using customEnv.CUSTOM_SCRIPT_PATH
See README.md
Script can be passed as a secret and mounted as a volume
I am trying to deploy a simple node.js application with the new Kubernetes support in Bluemix. When I run the container I made, I get a ImagePullBackOff error, which means it can't pull down the image.
NAME READY STATUS RESTARTS AGE
hello-node-2399519400-6m8dz 0/1 ImagePullBackOff 0 13m
My Docker image uses the node.js base image.
FROM node:6.9.2
EXPOSE 8080
COPY server.js .
CMD node server.js
I deployed using:
docker build -t hello-node:v1 .
kubectl run hello-node --image=hello-node:v1 --port=8080
I am thinking that Bluemix can't pull down the node.js image, but I am not certain.
I see the docker build of the image, and I'm presuming that you're using the kubectl with the exported cluster config (bx cs cluster-config ...), so that it's targetting your cluster.
Did you tag and push that image from your local docker into the bluemix registry, or to another remote registry that would be accessible from the container service? (My apologies if this is obvious - just didn't see the step there to tag and push it to a registry that would be available).
I had to first push the image to Bluemix with:
docker build -t registry.ng.bluemix.net/namespace/hello-node:1
docker push registry.ng.bluemix.net/namespace/hello-node:1
kubectl run hello-node-deployment --image=registry.ng.bluemix.net/namespace/hello-node:1
I have a scalable Python 2.7 app on OpenShift and I'm getting this 503 error.
I checked some answers that might work but they say to rhc into the app and change the Haproxy configurations, but I don't have a clue on how to do it.
Can someone help me please?
1) Install rhc: https://developers.openshift.com/en/managing-client-tools.html and read https://blog.openshift.com/how-haproxy-scales-openshift-apps/
2) Run $ rhc setup for the initial configuration of the tool and check https://developers.openshift.com/en/managing-log-files.html#accessing-logs-via-ssh for viewing haproxy logs
3) Run rhc ssh --app yourapp, once inside, cd haproxy/conf and change your haproxy.cfg appropriately
I edited haproxy.cfg:
option httpchk OPTIONS * HTTP/1.1\r\nHost:\ {{ my app link }}
It’s working now.
I want to set the -Djboss.server.default.config env variable in my JBoss AS 7 cartridge.
I have tried using the action hook as follows
export _JAVA_OPTS=$_JAVA_OPTS"-Djboss.server.default.config=standalone-custom.xml"
and the file name is pre_start_jboss-as7.
This env is not set in JBoss. I tried restarting JBoss as well but still no luck.
I also tried from command prompt using rhc set-env command but still no luck.
Can anyone help me in setting this environment variable to my JBoss AS7 cartridge??
You can create a file in your gear path ~/jbosseap/env/ with name JAVA_OPTS_EXT
and put the env variable -Djboss.server.default.config in to this file
then when the jboss gear start, it will add this env after your JAVA_OPTS
As far i know, when you have your local git copy of the repository of your application, in that directory structure, there is an standalone.xml which is the one that JBoss loads in your Openshift gear; have you tried to work with that file instead?