org.postgresql.util.PSQLException: The connection attempt failed

I am using Postgres with liquibase and running in a Kubernetes cluster, I am getting connection attempt failed.
It is not showing any other details for the error.

below is my YAML file.
Please let me know if anyone has any idea
Thanks

apiVersion: v1
metadata:
  name: changelog-config-testrepo-suffix-pipeline-pr-11-52z
data:
  changelog.xml: |
    <?xml version="1.0" encoding="UTF-8"?>
    <databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog"
                        xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext"
                        xmlns:pro="http://www.liquibase.org/xml/ns/pro"
                        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                        xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog   http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd   http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd   http://www.liquibase.org/xml/ns/pro http://www.liquibase.org/xml/ns/pro/liquibase-pro-latest.xsd"
                        logicalFilePath="changelog.xml">
       <changeSet author="akansha" id="TEST-RDS">
          <createTable schemaName="RM" tableName="PHONE_NUMBER_MOVE">
             <column name="ID" type="NUMBER">
                <constraints primaryKey="true"/>
             </column>
          </createTable>
       </changeSet>
    </databaseChangeLog>
kind: ConfigMap
---
apiVersion: batch/v1
kind: Job
metadata:
  name: liquibase-testrepo-suffix-pipeline-pr-11-52z
  labels:
    app: liquibase
    tag: liquibase-testrepo-suffix-pipeline-pr-11-52z
spec:
  backoffLimit: 1
  ttlSecondsAfterFinished: 60
  activeDeadlineSeconds: 700
  template:
    metadata:
      labels:
        app: liquibase
    spec:
      volumes:
      - name: changelog-config
        configMap:
          name: changelog-config-testrepo-suffix-pipeline-pr-11-52z
      imagePullSecrets:
      - name: dtr-access
      restartPolicy: Never
      containers:
      - name: liquibase
        command:
        - /liquibase/liquibase
        env:
        - name: USERNAME
          value: postgres
        - name: PASSWORD
          value: postgres
        - name: COMMAND
          value: update
        args:
        - --url=jdbc:postgresql://<rds-postgres>:5432/database-1?user=postgres&password=postgres
        - --username=$(USERNAME)
        - --password=$(PASSWORD)
        - --classpath=/liquibase/lib/postgresql.jar
        - --changeLogFile=/liquibase/db/changelog/changelog.xml
        - $(COMMAND)
        image: <dtr-path>/liquibase:3.8.9
        volumeMounts:
        - name: changelog-config
          mountPath: /liquibase/db/changelog