Add TNS Names Configuration

docker/oracle-observer/Dockerfile

@@ -53,9 +53,11 @@ RUN rm -rf /opt/aws
 
 USER oracle:oinstall
 
+COPY configure_tnsnames.sh /home/oracle/configure_tnsnames.sh
+RUN  chmod u+x /home/oracle/configure_tnsnames.sh
 COPY dummyfile.txt /opt/response.txt
 
 EXPOSE 8080
 
 # Dummy command to keep container running during development
-CMD ["/bin/bash","-c","while true; do cat /opt/response.txt | nc -l -p 8080; done"]
+CMD ["/bin/bash","-c","/home/oracle/configure_tnsnames.sh; while true; do cat /opt/response.txt | nc -l -p 8080; done"]

docker/oracle-observer/configure_tnsnames.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+
+. ~/.bash_profile
+
+# Check if required environment variables are set
+if [ -z "$PRIMARYDB_HOSTNAME" ]; then
+  echo "Error: PRIMARYDB_HOSTNAME is not set."
+  exit 1
+fi
+
+if [ -z "$DATABASE_PORT" ]; then
+  echo "Error: DATABASE_PORT is not set."
+  exit 1
+fi
+
+if [ -z "$DATABASE_NAME" ]; then
+  echo "Error: DATABASE_NAME is not set."
+  exit 1
+fi
+
+# Treat standby database environment variables as "none" if not set
+STANDBYDB1_HOSTNAME=${STANDBYDB1_HOSTNAME:-none}
+STANDBYDB2_HOSTNAME=${STANDBYDB2_HOSTNAME:-none}
+
+# Path to tnsnames.ora file
+tnsnames_file="${ORACLE_HOME}/network/admin/tnsnames.ora"
+
+# Create the tnsnames.ora file
+cat <<EOL > "$tnsnames_file"
+$DATABASE_NAME =
+  (DESCRIPTION =
+    (ADDRESS = (PROTOCOL = TCP)(HOST = $PRIMARYDB_HOSTNAME)(PORT = $DATABASE_PORT))
+    (CONNECT_DATA =
+      (SERVICE_NAME = $DATABASE_NAME)
+    )
+  )
+EOL
+
+# Add standby databases if they exist
+if [ "$STANDBYDB1_HOSTNAME" != "none" ]; then
+  cat <<EOL >> "$tnsnames_file"
+${DATABASE_NAME}S1 =
+  (DESCRIPTION =
+    (ADDRESS = (PROTOCOL = TCP)(HOST = $STANDBYDB1_HOSTNAME)(PORT = $DATABASE_PORT))
+    (CONNECT_DATA =
+      (SERVICE_NAME = ${DATABASE_NAME}S1)
+    )
+  )
+EOL
+fi
+
+if [ "$STANDBYDB2_HOSTNAME" != "none" ]; then
+  cat <<EOL >> "$tnsnames_file"
+${DATABASE_NAME}S2 =
+  (DESCRIPTION =
+    (ADDRESS = (PROTOCOL = TCP)(HOST = $STANDBYDB2_HOSTNAME)(PORT = $DATABASE_PORT))
+    (CONNECT_DATA =
+      (SERVICE_NAME = ${DATABASE_NAME}S2)
+    )
+  )
+EOL
+fi