Hi,
31.10.2008 11:35, Isabel Bermejo wrote:
> Hi
>
> Yes, the script I made works correctly. It dumps the database to a file
> /tmp/fifofile.
Which should be a FIFO you create in the run before job script... but
that's already implemented, I think.
> What I want to do is to backup MySQL database using bacula and fifo. I know
> that is easy to dump first the database to a file and then backup that file
> (I've tried this way and it works correctly), but I have not enough space to
> dump a high database to a file. I read in Bacula manual that I can configure
> the Bacula Storage defining a Device Resource with fifo. As I can read from
> manual:
>
> "In addition to a tape device name or a directory name, Bacula will accept
> the name of a FIFO. If a FIFO device is specified for a backup operation,
> you must have a program that reads what Bacula writes into the FIFO...with
> the RunBeforeJob directive." And then I can see an example of a fifo device
> resource
Well, that is from the SD documentation. You need the FileSet manual
here...
> So I configured a job with RunBeforeJob option specifying a script which
> dumps the database to a fifofile. Then I create a new FileSet with
> readfifo=yes because this option, "If enabled, tells the Client to read the
> data on a backup and write the data on a restore to any FIFO (pipe) that is
> explicitly mentioned in the FileSet. In this case, you must have a program
> already running that writes into the FIFO for a backup or reads from the
> FIFO on a restore". Moreover, I create a Storage named FifoStorage, that is
> configured in Storage daemon.
>
> I'm not sure if I'm doing things right, but I'm gonna explain you what is my
> intention: When I run a backupMySQL, the scripts initiates the dump to a
> fifofile while the client reads that file backing up the database whitout
> using extra space.
>
> Now, my question is: Do you mean that I have to define the fifo only in one
> of the resource? Which will be a correct configuration? I'm confused about
> all the documents I've read
Where do you want your data to end up? If on tape or on disk, you
don't need a FIFO in the SD configuration.
If you want to send the volume file somewhere else, e.g. across the
network to a remote storage server, a FIFO might be the right choice.
In such a case, you'd need to know a lot about how Bacula works, so
you wouldn't ask this question :-)
What you want is to read the client's data from a FIFO - that has no
impact on the SD setup.
Arno
> Thank you
> ISABEL
>
>
> -----Mensaje original-----
> De: Arno Lehmann [mailto:al AT its-lehmann DOT de]
> Enviado el: viernes, 31 de octubre de 2008 11:04
> Para: bacula-users AT lists.sourceforge DOT net
> Asunto: Re: [Bacula-users] Storage daemon didn't accept Device
> "FifoStorage"
>
>
> Hi,
>
> 31.10.2008 10:27, Isabel Bermejo wrote:
>> Hi
>> I'm trying to backup MySQL database using bacula and a FifoStorage. First
> I
>> configure a script named "backwithfifo" which dumps the database.
>>
>> #!/bin/sh
>> #
>> exec > /dev/null
>> SCRIPTDIR=/usr/bin
>> mkfifo /tmp/tmpfifo
>> cd $SCRIPTDIR
>> ./mysqldump -h localhost -u root -pclipper iesa > /tmp/tmpfifo
>> res=$?
>> if (test $res -ne 0) then
>> logger -t mysql -isd ERROR Dump done with errors. Exit status $res
>> else
>> logger -t mysql -isd OK Dump done with no errors. Exit status $res
>> fi
>
> I assume this works correctly.
>
>> Then I modify Bacula files to run the backup, using the script, to a
>> fifofile.
>>
>> In Bacula-Director file:
>> Job {
>> Name = "BackupMySQL"
>> Type = Backup
>> Client = client-fd
>> FileSet = "MySQLdb"
>> Schedule = "WeeklyCycleAfterBackup"
>> Storage = FifoStorage
>> Messages = Standard
>> Pool = MySQLPool
>> RunBeforeJob = "/etc/bacula/MyScripts/backwithfifo" #this is the script
>> which dumps the database to a fifofile
>> Write Bootstrap = "/var/lib/bacula/BackupMySQL.bsr"
>>
>> FileSet {
>> Name = "MySQLdb"
>> Include {
>> Options {
>> signature = MD5
>> readfifo = yes
>> }
>> File = /tmp/fifofiles
>> }
>> }
>>
>> Storage {
>> Name = FifoStorage
>> Address = xxx.xxx.xxx.xxx
>> SDPort = 9103
>> Password = "password"
>> Device = FifoStorage
>> Media Type = Fifo
>> }
>>
>> In Bacula-Storage file:
>> Device {
>> Name = FifoStorage
>> Media Type = Fifo
>> Archive Device = /tmp/fifofiles
>
> This is probably not what you want - the FIFO is read by the FD and
> you've already set that up above.
>
> Here, you need a normal storage device - either a tape drive or a disk
> directory where the volumes will be written to. The SD doesn't need to
> know anything about the FIFO setup.
>
>> Label Media = yes
>> Random Access = no
>> AutomaticMount = no
>> RemovableMedia = no
>> MaximumOpenWait = 60
>> AlwaysOpen = no
>
> Those settings also look like you tried to set up a FIFO for storage -
> you can do that, but is is in no way related to the FIFO where the
> backed up data comes from.
>
> You'd need a FIFO created on the SD, which would direct its output
> somewhere else.
>
> You probably should simply try this with a regular disk-based storage
> first.
>
> Arno
>
>> }
>>
>> When I run the backup job, it results on an error:
>>
>> 31-Oct 10:08 client-dir: RunBefore: mysql[28164]: Volcado realizado
>> correctamente.Exit status 0
>> 31-Oct 10:08 client-dir: No prior Full backup Job record found.
>> 31-Oct 10:08 client-dir: No prior or suitable Full backup found. Doing
> FULL
>> backup.
>> 31-Oct 10:08 client-dir: Start Backup JobId 10063,
>> Job=BackupMySQL.2008-10-31_10.07.42
>> 31-Oct 10:08 client-sd: BackupMySQL.2008-10-31_10.07.42 Fatal error:
>> Archive "FifoStorage" requested by DIR could not be opened or does
> not
>> exist.
>> 31-Oct 10:08 client-dir: BackupMySQL.2008-10-31_10.07.42 Fatal error:
>> Storage daemon didn't accept Device "FifoStorage" because:
>> 3925 Device "FifoStorage" could not be opened or does not exist.
>> 31-Oct 10:08 client-dir: BackupMySQL.2008-10-31_10.07.42 Error: Bacula
>> 1.36.3 (22Apr05): 31-Oct-2008 10:08:26
>> JobId: 10063
>> Job: BackupMySQL.2008-10-31_10.07.42
>> Backup Level: Full (upgraded from Incremental)
>> Client: client-fd
>> FileSet: "MySQLdb" 2008-10-31 09:59:45
>> Pool: "MySQLPool"
>> Storage: "FifoStorage"
>> Start time: 31-Oct-2008 10:07:44
>> End time: 31-Oct-2008 10:08:26
>> FD Files Written: 0
>> SD Files Written: 0
>> FD Bytes Written: 0
>> SD Bytes Written: 0
>> Rate: 0.0 KB/s
>> Software Compression: None
>> Volume name(s):
>> Volume Session Id: 2
>> Volume Session Time: 1225443462
>> Last Volume Bytes: 0
>> Non-fatal FD errors: 0
>> SD Errors: 0
>> FD termination status:
>> SD termination status:
>> Termination: *** Backup Error ***
>>
>> As you can see, the error is "Storage daemon didn't accept Device
>> FifoStorage because could not be opened or does not exist". I can see the
>> file fifofile in /tmp/fifofile and I can do a cat but the Storage Daemon
>> seems can't open the file. I don't know how to configure a backup job for
> a
>> database using fifo. Can anyone tell me where is the error?
>>
>> Thanks a lot
>> ISABEL
>>
>>
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>
> --
> Arno Lehmann
> IT-Service Lehmann
> Sandstr. 6, 49080 Osnabrück
> www.its-lehmann.de
>
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