ClassNotFoundException org.postgresql.Driver when connecting with database for Guacamole - postgresql

Question

I'm trying to deploy Guacamole on a Kubernetes cluster. Firstly I've had problems with the particular Authentication type 10 not supported issue. According to this issue ticket on their jira page it's already fixed on their GitHub repo but has to be released yet.
So #Stavros Kois in the comments pointed out to me that they're using a temporary solution till the next release of Guacamole. I've copied the two scripts: 3-temp-hack and 4-temp-hack from their file and used it in my own deployment.
The deployment file is looking like this:
apiVersion: v1
kind: Service
metadata:
name: guacamole
namespace: $NAMESPACE
labels:
app: guacamole
spec:
ports:
- name: http
port: 80
targetPort: 8080
selector:
app: guacamole
type: ClusterIP
---
apiVersion: v1
kind: Service
metadata:
name: guacd
namespace: $NAMESPACE
labels:
app: guacamole
spec:
ports:
- name: http
port: 4822
targetPort: 4822
selector:
app: guacamole
type: ClusterIP
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: guacamole
namespace: $NAMESPACE
labels:
app: guacamole
spec:
replicas: 1
selector:
matchLabels:
app: guacamole
template:
metadata:
labels:
app: guacamole
spec:
containers:
- name: guacd
image: docker.io/guacamole/guacd:$GUACAMOLE_GUACD_VERSION
env:
- name: GUACD_LOG_LEVEL
value: "debug"
ports:
- containerPort: 4822
securityContext:
runAsUser: 1000
runAsGroup: 1000
allowPrivilegeEscalation: false
readOnlyRootFilesystem: true
- name: guacamole
image: docker.io/guacamole/guacamole:$GUACAMOLE_GUACAMOLE_VERSION
env:
- name: GUACD_HOSTNAME
value: "localhost"
- name: GUACD_PORT
value: "4822"
- name: POSTGRES_HOSTNAME
value: "database-url.nl"
- name: POSTGRES_PORT
value: "5432"
- name: POSTGRES_DATABASE
value: "guacamole"
- name: POSTGRES_USER
value: "guacamole_admin"
- name: POSTGRES_PASSWORD
value: "guacamoleadmin"
- name: HOME
value: "/home/guacamole"
- name: LOGBACK_LEVEL
value: "debug"
ports:
- name: http
containerPort: 8080
- name: https
containerPort: 8443
securityContext:
runAsUser: 1001
runAsGroup: 1001
allowPrivilegeEscalation: false
runAsNonRoot: true
# TEMPORARY WORKAROUND UNTIL GUACAMOLE RELEASE AN IMAGE WITH THE UPDATED DRIVER
volumeMounts:
- name: temphackalso
mountPath: "/opt/guacamole/postgresql"
volumes:
- name: temphack
persistentVolumeClaim:
claimName: temphack
- name: temphackalso
persistentVolumeClaim:
claimName: temphackalso
# TEMPORARY WORKAROUND UNTIL GUACAMOLE RELEASE AN IMAGE WITH THE UPDATED DRIVER
# https://issues.apache.org/jira/browse/GUACAMOLE-1433
# https://github.com/apache/guacamole-client/pull/655
initContainers:
- name: temp-hack-1
image: docker.io/guacamole/guacamole:$GUACAMOLE_GUACAMOLE_VERSION
securityContext:
runAsUser: 1001
runAsGroup: 1001
volumeMounts:
- name: temphack
mountPath: "/opt/guacamole/postgresql-hack"
command: ["/bin/sh", "-c"]
args:
- |-
echo "Checking postgresql driver version..."
if [ -e /opt/guacamole/postgresql/postgresql-42.2.24.jre7.jar ]; then
echo "Version found is correct."
exit 0
else
echo "Old version found. Will try to download a known-to-work version."
echo "Downloading (postgresql-42.2.24.jre7.jar)..."
curl -L "https://jdbc.postgresql.org/download/postgresql-42.2.24.jre7.jar" >"/opt/guacamole/postgresql-hack/postgresql-42.2.24.jre7.jar"
if [ -e /opt/guacamole/postgresql-hack/postgresql-42.2.24.jre7.jar ]; then
echo "Downloaded successfully!"
cp -r /opt/guacamole/postgresql/* /opt/guacamole/postgresql-hack/
if [ -e /opt/guacamole/postgresql-hack/postgresql-9.4-1201.jdbc41.jar ]; then
echo "Removing old version... (postgresql-9.4-1201.jdbc41.jar)"
rm "/opt/guacamole/postgresql-hack/postgresql-9.4-1201.jdbc41.jar"
if [ $? -eq 0 ]; then
echo "Removed successfully!"
else
echo "Failed to remove."
exit 1
fi
fi
else
echo "Failed to download."
exit 1
fi
fi
- name: temp-hack-2
image: docker.io/guacamole/guacamole:$GUACAMOLE_GUACAMOLE_VERSION
securityContext:
runAsUser: 1001
runAsGroup: 1001
volumeMounts:
- name: temphack
mountPath: "/opt/guacamole/postgresql-hack"
- name: temphackalso
mountPath: "/opt/guacamole/postgresql"
command: ["/bin/sh", "-c"]
args:
- |-
echo "Copying postgres driver into the final destination."
cp -r /opt/guacamole/postgresql-hack/* /opt/guacamole/postgresql/
if [ -e /opt/guacamole/postgresql/postgresql-42.2.24.jre7.jar ]; then
echo "Driver copied successfully!"
else
echo "Failed to copy the driver"
fi
So I've successfully copied the correct postgresql driver. The following commands returns the correct driver as expected: ls -lah /opt/guacamole/postgresql =
drwxrwxrwx 4 root root 4.0K Jul 28 15:46 .
drwxr-xr-x 1 root root 184 Dec 29 2021 ..
-rw-r--r-- 1 guacamole guacamole 5.9M Jul 28 17:06 guacamole-auth-jdbc-postgresql-1.4.0.jar
drwx------ 2 root root 16K Jul 28 15:45 lost+found
-rw-r--r-- 1 guacamole guacamole 0 Jan 1 1970 postgresql-42.2.24.jre7.jar
drwxr-xr-x 3 guacamole guacamole 4.0K Jul 28 15:46 schema
And: ls -lah /home/guacamole/.guacamole/lib =
drwxr-xr-x 2 guacamole guacamole 41 Jul 28 17:06 .
drwxr-xr-x 4 guacamole guacamole 82 Jul 28 17:06 ..
lrwxrwxrwx 1 guacamole guacamole 53 Jul 28 17:06 postgresql-42.2.24.jre7.jar -> /opt/guacamole/postgresql/postgresql-42.2.24.jre7.jar
But still getting the ClassNotFoundException org.postgresql.Driver. Anybody ideas?