Discuss April 2006

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318 discussions

device-mapper multipath
by Eric Lee 13 Apr '06

13 Apr '06

I am attempting to get multipath working with device-mapper (CentOS 4.2 and 4.3). It works on EVERY install of mine from RH (also v4.2, 4.3), but the same multipath.conf imported to all my installs of CentOS do not work. Note that I have tested a working 4.2 configuration file from RH on CentOS 4.2 and a working 4.3 configuration (it changed slightly) on CentOS 4.3. Neither worked. Our production systems are RH 4.2 so the 4.2 configuration file is below. Configuration: Promise vTrak 300i iSCSI iscsi-initiator-utils from 4.2/4.3 device-mapper-multipath from 4.2/4.3 Procedure: 1. Configure iscsi.conf and multipath.conf 2. Start iscsi: service iscsi start 3. Start multipath: service multipathd start 4. Make sure no stale paths exist: multipath -F 5. Scan and create paths: multipath -v 3 Below are the relevant configuration files: ======================================================== My iscsi.conf is very simple: DiscoveryAddress=172.16.160.60 ======================================================== >From iscsi-ls, the output is: ******************************************************************************* SFNet iSCSI Driver Version ...4:0.1.11(12-Jan-2005) ==================================================== There are two sessions, this creates two targets: # ls /dev/sd* /dev/sda /dev/sda2 /dev/sda5 /dev/sdb /dev/sdb2 /dev/sdb5 /dev/sda1 /dev/sda3 /dev/sda6 /dev/sdb1 /dev/sdb3 /dev/sdb6 ===================================================== The multipath.conf is as follows: defaults { multipath_tool "/sbin/multipath -v0" udev_dir /dev polling_interval 10 default_selector "round-robin 0" default_path_grouping_policy multibus default_getuid_callout "/sbin/scsi_id -g -u -s /block/%n" default_prio_callout "/bin/true" default_features "0" rr_wmin_io 100 failback immediate } devnode_blacklist { devnode "^(ram|raw|loop|fd|md|dm-|sr|scd|st)[0-9]*" devnode "^hd[a-z][[0-9]*]" devnode "^hda[0-9]*" devnode "^cciss!c[0-9]d[0-9]*[p[0-9]*]" } multipaths { multipath { wwid 222ea000155eadda4 alias stor path_grouping_policy multibus path_checker readsector0 path_selector "round-robin 0" failback immediate } } ================================================== The output from "multipath -v 3" of my CentOS machine is below: load path identifiers cache # # all paths in cache : # 222ea000155eadda4 0:0:0:0 sda 8:0 [ready] Promise /VTrak M300i /2200 222ea000155eadda4 1:0:0:0 sdb 8:16 [ready] Promise /VTrak M300i /2200 dm-0 blacklisted dm-1 blacklisted hda blacklisted hdc blacklisted md0 blacklisted ram0 blacklisted ram10 blacklisted ram11 blacklisted ram12 blacklisted ram13 blacklisted ram14 blacklisted ram15 blacklisted ram1 blacklisted ram2 blacklisted ram3 blacklisted ram4 blacklisted ram5 blacklisted ram6 blacklisted ram7 blacklisted ram8 blacklisted ram9 blacklisted ===== path info sda (mask 0x1f) ===== bus = 1 dev_t = 8:0 size = 3503903232 vendor = Promise product = VTrak M300i rev = 2200 h:b:t:l = 0:0:0:0 tgt_node_name = serial = 000000000000000000000000D46D0E4B486DC672 path checker = readsector0 (internal default) state = 2 getprio = /bin/true (internal default) prio = 0 uid = 222ea000155eadda4 (cache) ===== path info sdb (mask 0x1f) ===== bus = 1 dev_t = 8:16 size = 3503903232 vendor = Promise product = VTrak M300i rev = 2200 h:b:t:l = 1:0:0:0 tgt_node_name = serial = 000000000000000000000000D46D0E4B486DC672 path checker = readsector0 (internal default) state = 2 getprio = /bin/true (internal default) prio = 0 uid = 222ea000155eadda4 (cache) # # all paths : # 222ea000155eadda4 0:0:0:0 sda 8:0 [ready] Promise /VTrak M300i /2200 222ea000155eadda4 1:0:0:0 sdb 8:16 [ready] Promise /VTrak M300i /2200 pgpolicy = multibus (LUN setting) selector = round-robin 0 (LUN setting) features = 0 (internal default) hwhandler = 0 (internal default) rr_weight = 2 (config file default) no_path_retry = -1 (config file default) pg_timeout = NONE (internal default) 0 3290934 multipath 0 0 1 1 round-robin 0 2 1 8:0 100 8:16 100 set ACT_CREATE: map does not exists message stor 0 switch_group 1 create: stor (222ea000155eadda4) [size=1 GB][features="0"][hwhandler="0"] \_ round-robin 0 \_ 0:0:0:0 sda 8:0 [ready] \_ 1:0:0:0 sdb 8:16 [ready] reloading features ^^^^^^^^ Notice the 1GB in the map created. I have read in mailing list posts that 1GB is returned when it is unable to find the size. ================================================== The output from "multipath -v 3" of the working 4.2/4.3 machine is below: hda blacklisted hdc blacklisted md0 blacklisted ram0 blacklisted ram10 blacklisted ram11 blacklisted ram12 blacklisted ram13 blacklisted ram14 blacklisted ram15 blacklisted ram1 blacklisted ram2 blacklisted ram3 blacklisted ram4 blacklisted ram5 blacklisted ram6 blacklisted ram7 blacklisted ram8 blacklisted ram9 blacklisted path sda not found in pathvec ===== path sda ===== bus = 1 dev_t = 8:0 size = 3503903232 vendor = Promise product = VTrak M300i rev = 2200 h:b:t:l = 0:0:0:0 tgt_node_name = serial = 000000000000000000000000D46D0E4B486DC672Ð path checker = readsector0 (internal default) state = 2 getprio = /bin/true (internal default) prio = 0 getuid = /sbin/scsi_id -g -u -s /block/%n (internal default) uid = 222ea000155eadda4 (callout) path sdb not found in pathvec ===== path sdb ===== bus = 1 dev_t = 8:16 size = 3503903232 vendor = Promise product = VTrak M300i rev = 2200 h:b:t:l = 1:0:0:0 tgt_node_name = serial = 000000000000000000000000D46D0E4B486DC672Ð path checker = readsector0 (internal default) state = 2 getprio = /bin/true (internal default) prio = 0 getuid = /sbin/scsi_id -g -u -s /block/%n (internal default) uid = 222ea000155eadda4 (callout) # # all paths : # 222ea000155eadda4 0:0:0:0 sda 8:0 [VTrak M300i ] 222ea000155eadda4 1:0:0:0 sdb 8:16 [VTrak M300i ] pgpolicy = multibus (LUN setting) selector = round-robin 0 (LUN setting) features = 0 (internal default) hwhandler = 0 (internal default) 0 3492951862 multipath 0 0 1 1 round-robin 0 2 1 8:0 1000 8:16 1000 action preset to 0 action set to 4 create: stor (222ea000155eadda4) [size=1 TB][features="0"][hwhandler="0"] \_ round-robin 0 \_ 0:0:0:0 sda 8:0 \_ 1:0:0:0 sdb 8:16 message stor 0 switch_group 1 ^^^^^^^^ it detects the size correctly (it is over 1TB, it seems to do some rounding when it reports it here) ==================================== note the multipath config lines: not working: 0 3290934 multipath 0 0 1 1 round-robin 0 2 1 8:0 100 8:16 100 working: 0 3492951862 multipath 0 0 1 1 round-robin 0 2 1 8:0 1000 8:16 1000 The primary difference is in the 2nd number. That is, according to the multipath wiki, the "target length in 512-bytes blocks" for the multipath device. The one that does not work is smaller by a factor of 1063 (close to 1024, maybe it is using different units?) Has anyone run into any issue of this sort?

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firewall and * suggestions
by Simone 13 Apr '06

13 Apr '06

Hi, I am going to set up an office of 30 employees and since it's the first time I thought I will ask for suggestions (trying to make a CentOS base office :) ). I was planning to re use an old Compaq LPr PII 450, sw mirrored scsi 10000rpm disks, 448Mb RAM, to build a CentOS based firewall and I was wondering if this hardware would be enough to serve 30 clients (I already have a centos firewall serving 8 users on a PC celeron 1,3Ghz machine and top shows average load 0.00). The other service they'll need is filesharing, which will be Samba running on samba Dell PE1800 (although we could use a compaq 1850r PIII 600), while for the phone system I would like to set up Asterisk and I was wondering if anyone has had a good experience with the Xorcom TS-1, which seems a nice cost effective system. Suggestions are very welcome, have a nice day. Simone

2 1

JavaRunTime Install Error
by Mark Sargent 13 Apr '06

13 Apr '06

Hi All, I installed the following from here, http://java.com/en/download/manual.jsp and followed here, http://java.com/en/download/help/5000010500.xml#rpm what am I doing wrong? Also, how does one find where the rpm installed to? whereis or locate or find or is there a rpm option? Cheers Mark Sargent. [coolprogrammer@localhost local]$ sudo /bin/rpm -iv jre-1_5_0_06-linux-i586.rpm Preparing packages for installation... jre-1.5.0_06-fcs [coolprogrammer@localhost local]$ ls Adobe apache2 bin etc games include javarun jre-1_5_0_06-linux-i586.rpm lib libexec man mysql sbin share src [coolprogrammer@localhost local]$ whereis jre-1.5.0_06-fcs jre-1.5: [coolprogrammer@localhost local]$ man rpm [coolprogrammer@localhost local]$ sudo /bin/rpm -i jre-1_5_0_06-linux-i586.rpm package jre-1.5.0_06-fcs is already installed [coolprogrammer@localhost local]$ sudo /bin/rpm -i jre-1.5 error: open of jre-1.5 failed: No such file or directory [coolprogrammer@localhost local]$ sudo /bin/rpm -i jre-1.5.0_06-fcs error: open of jre-1.5.0_06-fcs failed: No such file or directory Ok, I re-checked my steps, [coolprogrammer@localhost local]$ sudo /bin/rpm -i jre* package jre-1.5.0_06-fcs is already installed [coolprogrammer@localhost local]$ sudo /bin/rpm -e jre-1.5.0_06-fcs [coolprogrammer@localhost local]$ sudo /bin/rpm -i jre* [coolprogrammer@localhost local]$ sudo /bin/rpm -iv jre-1_5_0_06-linux-i586.rpm Preparing packages for installation... package jre-1.5.0_06-fcs is already installed [coolprogrammer@localhost local]$ ls Adobe apache2 bin etc games include jre-1_5_0_06-linux-i586.rpm lib libexec man mysql sbin share src

3 3

reinstall packages
by Bowie Bailey 13 Apr '06

13 Apr '06

I have some rpm packages that I built locally. After installing and configuring them, I found a problem that required a source patch. I have rebuilt the rpms, but since they have the same version number as the original, I can't use "yum localupdate" to install them. Is there a clean way to do this with yum, or do I just need to remove the old packages and then install the new ones? -- Bowie

4 3

'partitions not contstrained to drive'???
by Les Mikesell 13 Apr '06

13 Apr '06

I was trying to do a new install on RAID1 and my first drive happened to be partitioned correctly from previous use so I tried the 'clone partions' option in disk druid to create matching ones on the second drive and got this error message: "The source drive has partitions which are not constrained to the drive /dev/sda". What does that mean? -- Les Mikesell lesmikesell(a)gmail.com

1 0

RE: [CentOS] more than one repo with --disablerepo
by Bowie Bailey 13 Apr '06

13 Apr '06

Johnny Hughes wrote: > On Thu, 2006-04-13 at 11:04 -0400, Bowie Bailey wrote: > > > > What I would love to find a way to do is this: > > > > yum --disablerepo=* --enablerepo=csgfs update > > ...and still allow yum to use the base and update repos to satisfy > > dependencies. > > > > What I did instead was this: > > > > yum --disablerepo=* --enablerepo=csgfs check-update > > > > I then grabbed the list, extracted the package names and fed them back > > to "yum update". > > > > The idea was that I wanted to update the csgfs packages and the > > required kernel (and other) packages, but I wanted to hold off on the > > rest of the 4.3 updates. > > yum --disablerepo=* --enablerepo=csgfs --enablerepo=base --enablerepo=updates update I don't think that does what I want. The only packages I want to update are the ones from the csgfs repo and whatever else is needed to fill the requirements of those packages. I don't want to update all the packages from base and updates, just the ones that are needed to update csgfs. -- Bowie

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RE: [CentOS] more than one repo with --disablerepo
by Bowie Bailey 13 Apr '06

13 Apr '06

Rodrigo Barbosa wrote: > > Another interesting trick I use all the time: > > yum --disablerepo=* --enablerepo=dag install XXXX > > That way, all repos will be disabled, and only the one explicitily > listed will be used. What I would love to find a way to do is this: yum --disablerepo=* --enablerepo=csgfs update ...and still allow yum to use the base and update repos to satisfy dependencies. What I did instead was this: yum --disablerepo=* --enablerepo=csgfs check-update I then grabbed the list, extracted the package names and fed them back to "yum update". The idea was that I wanted to update the csgfs packages and the required kernel (and other) packages, but I wanted to hold off on the rest of the 4.3 updates. -- Bowie

2 1

device-mapper multipath
by Eric Lee 13 Apr '06

13 Apr '06

1 0

RE: [CentOS] apache permission problems
by Mike Kercher 13 Apr '06

13 Apr '06

You may need to chmod 755 /home/username Mike > -----Original Message----- > From: centos-bounces(a)centos.org > [mailto:centos-bounces@centos.org] On Behalf Of Nick Smith > Sent: Thursday, April 13, 2006 10:07 AM > To: CentOS mailing list > Subject: Re: [CentOS] apache permission problems > > On 4/13/06, Ignacio Vazquez-Abrams <ivazquez(a)ivazquez.net> wrote: > > On Thu, 2006-04-13 at 10:45 -0400, Nick Smith wrote: > > > any ideas? > > > > http://fedora.redhat.com/docs/selinux-apache-fc3/ > > > > > Im not running selinx or an selinux kernel I turned it off > during install, i did run the system-config-securitylevel > from the command line and the firewall was on, and i turned > if off and still nothing changed.... > _______________________________________________ > CentOS mailing list > CentOS(a)centos.org > http://lists.centos.org/mailman/listinfo/centos >

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Update of CentOS 4.0 to 4.3
by Barry Brimer 13 Apr '06

13 Apr '06

I need to update a CentOS 4.0 system to CentOS 4.3. In my opinion, I should start out with a "yum update yum centos-yumconf" and then follow that with a "yum update". Does anyone have any other input as to what other packages might be needed to be updated with yum and centos-yumconf before the mass upgrade? Thanks, Barry

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Discuss April 2006