We are running the OpenLiberty Operator using images from icr.io/appcafe/open-liberty on RedHat Openshift and would like to mount the following files from a ConfigMap:

• /opt/ol/wlp/usr/servers/defaultServer/configDropins/overrides/additional-server.xml
• /opt/ol/wlp/usr/servers/defaultServer/jvm.options

We'd like to add these mounts so that we can depoly the application on different environments using different settings (for example HeapSize etc.) or add for example a trace statement for problem detection without having to rebuild the container.

However when we add these mounts the startup of the pod fail with the following error (when mounting jvm.options):

/opt/ol/helpers/runtime/docker-server.sh: line 47: /config/configDropins/defaults/keystore.xml: No such file or directory

and right, /config/configDropins/defaults does not exist in this case (but exists if we remove the mount)!

- or -

when mounting additional-server-xml

/opt/ol/helpers/runtime/docker-server.sh: line 80: /config/configDropins/overrides/truststore.xml: Read-only file system

So - any idea how we can achieve this to get the jvm.options (and an additional server.xml) mounted?

Thanks a lot in advance for any hints, Hermann

> so that we can depoly the application on different environments using different settings (for example HeapSize etc.) or add for example a trace statement for problem detection without having to rebuild the container

Some of this you can also accomplish with environment variables, e.g. the JVM_ARGS Liberty environment variable for JVM settings.

> would like to mount the following files from a ConfigMap

How are you doing this? I've had success with something like the following as an example:

In your current directory, create a local file named tracefromstartup.xml with the following contents and replace with your desired trace specification:

<?xml version="1.0" encoding="UTF-8"?><server>  <logging traceSpecification="*=info" maxFileSize="100" maxFiles="10" /></server>

Create a ConfigMap entry based on the local file:

oc create configmap tracefromstartup --from-file tracefromstartup.xml

Edit the relevant Liberty Operator managed application. In the spec section, add or edit a volumes section that mounts the ConfigMap and a volumeMounts section that places the file into the container; for example:

spec:  volumes:  - name: tracefromstartup    configMap:      name: tracefromstartup  volumeMounts:  - name: tracefromstartup    mountPath: /config/configDropins/overrides/tracefromstartup.xml    subPath: tracefromstartup.xml

We are running the OpenLiberty Operator using images from icr.io/appcafe/open-liberty on RedHat Openshift and would like to mount the following files from a ConfigMap:

• /opt/ol/wlp/usr/servers/defaultServer/configDropins/overrides/additional-server.xml
• /opt/ol/wlp/usr/servers/defaultServer/jvm.options

We'd like to add these mounts so that we can depoly the application on different environments using different settings (for example HeapSize etc.) or add for example a trace statement for problem detection without having to rebuild the container.

However when we add these mounts the startup of the pod fail with the following error (when mounting jvm.options):

/opt/ol/helpers/runtime/docker-server.sh: line 47: /config/configDropins/defaults/keystore.xml: No such file or directory

and right, /config/configDropins/defaults does not exist in this case (but exists if we remove the mount)!

- or -

when mounting additional-server-xml

/opt/ol/helpers/runtime/docker-server.sh: line 80: /config/configDropins/overrides/truststore.xml: Read-only file system

So - any idea how we can achieve this to get the jvm.options (and an additional server.xml) mounted?

Thanks a lot in advance for any hints, Hermann

Thanks a lot for the link with the Java Options.

Regarding the mount of the server.xml that's exactly the way I'm doing it as well. Create a ConfigMap and provide a volume and volumeMount in the manifest (standard K8S procedure) however I'm not sure about the subPath element. Need to check

> so that we can depoly the application on different environments using different settings (for example HeapSize etc.) or add for example a trace statement for problem detection without having to rebuild the container

Some of this you can also accomplish with environment variables, e.g. the JVM_ARGS Liberty environment variable for JVM settings.

> would like to mount the following files from a ConfigMap

How are you doing this? I've had success with something like the following as an example:

In your current directory, create a local file named tracefromstartup.xml with the following contents and replace with your desired trace specification:

<?xml version="1.0" encoding="UTF-8"?><server>  <logging traceSpecification="*=info" maxFileSize="100" maxFiles="10" /></server>

Create a ConfigMap entry based on the local file:

oc create configmap tracefromstartup --from-file tracefromstartup.xml

Edit the relevant Liberty Operator managed application. In the spec section, add or edit a volumes section that mounts the ConfigMap and a volumeMounts section that places the file into the container; for example:

spec:  volumes:  - name: tracefromstartup    configMap:      name: tracefromstartup  volumeMounts:  - name: tracefromstartup    mountPath: /config/configDropins/overrides/tracefromstartup.xml    subPath: tracefromstartup.xml

We are running the OpenLiberty Operator using images from icr.io/appcafe/open-liberty on RedHat Openshift and would like to mount the following files from a ConfigMap:

• /opt/ol/wlp/usr/servers/defaultServer/configDropins/overrides/additional-server.xml
• /opt/ol/wlp/usr/servers/defaultServer/jvm.options

We'd like to add these mounts so that we can depoly the application on different environments using different settings (for example HeapSize etc.) or add for example a trace statement for problem detection without having to rebuild the container.

However when we add these mounts the startup of the pod fail with the following error (when mounting jvm.options):

/opt/ol/helpers/runtime/docker-server.sh: line 47: /config/configDropins/defaults/keystore.xml: No such file or directory

and right, /config/configDropins/defaults does not exist in this case (but exists if we remove the mount)!

- or -

when mounting additional-server-xml

/opt/ol/helpers/runtime/docker-server.sh: line 80: /config/configDropins/overrides/truststore.xml: Read-only file system

So - any idea how we can achieve this to get the jvm.options (and an additional server.xml) mounted?

Thanks a lot in advance for any hints, Hermann