fips: Modified the postStart lifecycle hook to reference to sha256

Author: shudeshp

kustomize/components/clairpgupgrade/base/clair-pg-old.deployment.yaml

@@ -57,3 +57,18 @@ spec:
             requests:
               cpu: 500m
               memory: 2Gi
+          lifecycle:
+            postStart:
+              exec:
+                command: ["/bin/sh", "-c", "
+                  until pg_isready; do
+                    echo 'Waiting for PostgreSQL to start...';
+                    sleep 2;
+                  done;
+                  echo 'password_encryption = scram-sha-256' >> $PGDATA/postgresql.conf;
+                  echo 'host all all 0.0.0.0/0 scram-sha-256' >> $PGDATA/pg_hba.conf;
+                  pg_ctl reload;
+                  psql -c \"ALTER SYSTEM SET password_encryption TO 'scram-sha-256';\";
+                  psql -c \"SELECT pg_reload_conf();\";
+                  psql -c \"ALTER USER postgres WITH PASSWORD 'postgres';\"
+                "]