How to install VTN Coordinator?
After executing db_setup, you have encountered the error "Failed to setup database"?
The error could be due to the below reasons * Access Restriction
The user who owns /usr/local/vtn/ directory and installs VTN coordinator, can only start db_setup. Example :
The directory should appear as below (assuming the user as "vtn"):
# ls -l /usr/local/
drwxr-xr-x. 12 vtn vtn 4096 Mar 14 21:53 vtn
If the user doesnot own /usr/local/vtn/ then, please run the below command (assuming the username as vtn),
chown -R vtn:vtn /usr/local/vtn- Postgres not Present
1. In case of Fedora/CentOS/RHEL, please check if /usr/pgsql/<version> directory is present and also ensure the commands initdb, createdb,pg_ctl,psql are working. If, not please re-install postgres packages 2. In case of Ubuntu, check if /usr/lib/postgres/<version> directory is present and check for the commands as in the previous step.
- Not enough space to create tables
Please check df -k and ensure enough free space is available.
- If the above steps do not solve the problem, please refer to the log file for the exact problem
/usr/local/vtn/var/dbm/unc_setup_db.log for the exact error.
What are the things to check after vtn_start?
- list of coordinator processes
- Run the below command ensure the Coordinator daemons are running.
Command: /usr/local/vtn/bin/unc_dmctl status
Name Type IPC Channel PID
----------- ----------- -------------- ------
drvodcd DRIVER drvodcd 15972
lgcnwd LOGICAL lgcnwd 16010
phynwd PHYSICAL phynwd 15996- Issue the curl command to fetch version and ensure the process is able to respond.
How to debug a startup failure? The following activities take place in order during startup * Database server is started after setting virtual memory to required value,Any database startup errors will be reflected in any of the below logs.
/usr/local/vtn/var/dbm/unc_db_script.log.
/usr/local/vtn/var/db/pg_log/postgresql-*.log (the pattern will have the date)- uncd daemon is kicked off, The daemon in turn kicks off the rest of the daemons.
Any uncd startup failures will be reflected in /usr/local/vtn/var/uncd/uncd_start.err.
