Maintenance script: Created page with " == Installation of a dCache Headnode == This page details the installation of a quick backup of the dCache headnode and will become the page that details the installation ..."

2015-08-26T12:28:40Z

Created page with " == Installation of a dCache Headnode == This page details the installation of a quick backup of the dCache headnode and will become the page that details the installation ..."

New page

== Installation of a dCache Headnode ==

This page details the installation of a quick backup of the dCache headnode and will become the page that details the installation of the new, still to be installed, headnode.

=== Re-installing the old maite ===

On re-installing the old maite, a number of problems were encountered after the machine was installed with the "dCache headnode" template from quattor. 
In the rest of the document, all the backups that were taken are located in : '''jefke.wn:/storage/userbackup/<something>'''

==== Missing config files and symbolic links ====
Make sure the following symbolic links are present:

<pre>
ln -s /opt/pnfs/bin/pnfs /etc/init.d/pnfs
ln -s /opt/d-cache/bin/dcache-core /etc/init.d/dcache-core
ln -s /opt/d-cache/bin/dcache-srm /etc/init.d/dcache-srm
ln -s /pnfs/fs /pnfs/ftpBase
ln -s /pnfs/fs/usr /pnfs/iihe
</pre>

Copy all the config files from the backup at '''/storage/userbackup/Maite_Config/config_dCache.tar.gz'''
<pre>
mv /opt/d-cache /opt/d-cache_orig
</pre>
and untar the file.

==== Restore the backup of the database ====
First, just applying the quattor templates did not result in anything working. these are the manual tweaks that are necessary: 
Copy the latest backup of the pnfs database from '''/storage/userbackup/Maite_Db_backup'''. You need

<pre>
<something>pnfsdb.tar
full_<something>
</pre>
untar pnfsdb.tar to /opt/pnfsdb 
import the pnfsdb into the newly created DB as the user postgres:

<pre>
su - postgres
zcat <path to gzipped full dump> | psql postgres
</pre>
Now verify with the ssh interface to dcache that the DB has been restored.

==== Miscellaneous configuration ====
Backup script for the pnfs database:

<pre>
vi /etc/cron.daily/backup_postgres.sh
</pre>
and add:

<pre>
dest=/var/postgres-backup/full_<tt>date '+%s'</tt>
tar cvf ${dest}-pnfsdb.tar /opt/pnfsdb
echo "doing pg_dumpall"
su - postgres -c "pg_dumpall | gzip > $dest.gz"
echo "done"
scp ${dest}-pnfsdb.tar jefke.wn:/storage/userbackup/Maite_Db_backup
scp $dest.gz jefke.wn:/storage/userbackup/Maite_Db_backup
find /var/postgres-backup -mtime +30 | xargs rm
ssh -qx jefke.wn "find /storage/userbackup/Maite_Db_backup -mtime +30 | xargs rm"
</pre>

Make sure /var/postgres-backup/ exists and is writable by the user postgres. 
copy the file '''/storage/userbackup/Maite_Config/damadori.tar''' and untar it in '''/root'''

==== fire up dcache ====

<pre>
ncm-ncd --co dcache
/opt/d-cache/bin/dcache start
</pre>

{{TracNotice|{{PAGENAME}}}}

InstalldCacheHeadnode - Revision history

Maintenance script: Created page with " == Installation of a dCache Headnode == This page details the installation of a quick backup of the dCache headnode and will become the page that details the installation ..."