dracut.module: Update the module's script.

Support separated run between fluent-bit and metadata-collect-agent.
Add date for beginning and end.

dracut.module/90metadata-collect/collect.sh

@@ -5,6 +5,13 @@
 source $NEWROOT/etc/rapid.space/get-network.sh
 sed -i "s/%WENDELIN_REFERENCE%/$(cat $NEWROOT/etc/rapid.space/wendelin_reference)/g" /etc/flb.conf
 
-/sbin/metadata-collect-agent $NEWROOT/usr/bin /sbin/fluent-bit /etc/libfluentbit_wendelin.so /etc/flb.conf /var/log/metadata_collect.log
-rm /var/log/metadata_collect.log
-/sbin/metadata-collect-agent $NEWROOT/usr/sbin /sbin/fluent-bit /etc/libfluentbit_wendelin.so /etc/flb.conf /var/log/metadata_collect.log
+log_file=/var/log/metadata_collect.log
+/sbin/fluent-bit -e /etc/libfluentbit_wendelin.so -c /etc/flb.conf &
+flb_pid=$!
+
+echo "{beginning_date: \"$(date)\"}" >> $log_file
+/sbin/metadata-collect-agent $NEWROOT/usr/bin $log_file
+/sbin/metadata-collect-agent $NEWROOT/usr/sbin $log_file
+echo "{end_date: \"$(date)\", end_marker: \"fluentbit_end\"}" >> $log_file
+
+waid $flb_pid