[Linux-ha-dev] add wait after login to iscsi RA
Dejan Muhamedagic
dejanmm at fastmail.fm
Wed Jan 16 01:13:23 MST 2008
Hi,
On Wed, Jan 16, 2008 at 02:20:46PM +0900, DAIKI MATSUDA wrote:
> Hi, All.
>
> I test the iscsi RA on the environment RHEL 5.1 iscsi initiator with
> heartbeat and CentOS 5.1 iscsi target. But they sometime do odd
> behaviour that not to mount file system. Maybe there is little time to
> mount file system after finishing iscsi RA and then Filesystem RA can
> not see scsi device on iscsi. So, I add the wait option to iscsi RA
> after login to iscsi target.
This RA was tested with both ietd of SLES10 and a dedicated file
server (more than 500 CTS runs). It did happen once that udev was
a bit slow on generating links, but I've never seen that disk
didn't immediately show up. Which version of ietd is on CentOS
5.1? Is there anything in the system logs? Did you apply all
fixes/upgrades?
BTW, the sequence of events on start is:
iscsiadm -m discovery ...
iscsiadm -m node ...
iscsiadm -m session ... | grep ...
i.e. before we return the session is checked.
As for the wait option, I'd rather have this resolved in another
way, if at all possible.
Thanks,
Dejan
> test log
> [root at domu4 ~]# iscsiadm -m discovery -t sendtargets -p 172.17.246.129
> && iscsiadm -m node -T iqn.2008-01.xxx:G01_V00 -p 172.17.246.129 -l
> && fdisk -l
> 172.17.246.129:3260,1 iqn.2008-01.jxxx:G01_V00
> Login session [iface: default, target: iqn.2008-01.xxx:G01_V00,
> portal: 172.17.246.129,3260]
>
> Disk /dev/xvda: 4194 MB, 4194304000 bytes
> 255 heads, 63 sectors/track, 509 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
> Device Boot Start End Blocks Id System
> /dev/xvda1 * 1 13 104391 83 Linux
> /dev/xvda2 14 509 3984120 8e Linux LVM
> [root at domu4 ~]# fdisk -l
>
> Disk /dev/xvda: 4194 MB, 4194304000 bytes
> 255 heads, 63 sectors/track, 509 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
>
> Device Boot Start End Blocks Id System
> /dev/xvda1 * 1 13 104391 83 Linux
> /dev/xvda2 14 509 3984120 8e Linux LVM
>
> Disk /dev/sda: 25.8 GB, 25803358208 bytes
> 64 heads, 32 sectors/track, 24608 cylinders
> Units = cylinders of 2048 * 512 = 1048576 bytes
>
> Device Boot Start End Blocks Id System
> /dev/sda1 1 24608 25198576 83 Linux
>
>
> Regards
> MATSUDA, Daiki
> <cib generated="false" admin_epoch="0" epoch="1" have_quorum="true" ignore_dtd="false" num_peers="0" cib_feature_revision="2.0" num_updates="40" cib-last-written="Wed Jan 16 13:44:18 2008" ccm_transition="1">
> <configuration>
> <crm_config>
> <cluster_property_set id="cib-bootstrap-options">
> <attributes>
> <nvpair id="cib-bootstrap-options-dc-version" name="dc-version" value="2.1.3-node: b143f7c497816922783be3294320414fc5d99f76"/>
> <nvpair id="cib-bootstrap-options-symmetric-cluster" name="symmetric-cluster" value="true"/>
> <nvpair id="cib-bootstrap-options-no-quorum-policy" name="no-quorum-policy" value="ignore"/>
> <nvpair id="stonith-enabled" name="stonith-enabled" value="true"/>
> </attributes>
> </cluster_property_set>
> </crm_config>
> <nodes>
> <node id="730963bf-4f18-4664-a4c4-19579517e73d" uname="domu4" type="normal"/>
> <node id="456fe75d-2190-4612-8f00-d4885b87eec8" uname="domu1" type="normal"/>
> </nodes>
> <resources>
> <group id="gr1">
> <primitive id="iscsi" class="ocf" type="iscsi" provider="heartbeat">
> <operations>
> <op id="iscsi:start" name="start" timeout="60s"/>
> <op id="iscsi:monitor" name="monitor" start_delay="30s" interval="15s" on_fail="fence"/>
> </operations>
> <instance_attributes id="iscsi:attrs">
> <attributes>
> <nvpair id="iscsi:portal" name="portal" value="172.17.246.129"/>
> <nvpair id="iscsi:target" name="target" value="iqn.2008-01.xxx:G01_V00"/>
> <nvpair id="iscsi:start_wait" name="start_wait" value="5"/>
> </attributes>
> </instance_attributes>
> </primitive>
> <primitive id="Filesystem" class="ocf" type="Filesystem" provider="heartbeat">
> <operations>
> <op id="Filesystem:monitor" name="monitor" start_delay="30s" interval="20s" on_fail="fence"/>
> </operations>
> <instance_attributes id="Filesystem:attrs">
> <attributes>
> <nvpair id="Filesystem:device" name="device" value="/dev/sda1"/>
> <nvpair id="Filesystem:directory" name="directory" value="/share"/>
> <nvpair id="Filesystem:fstype" name="fstype" value="ext3"/>
> </attributes>
> </instance_attributes>
> </primitive>
> <primitive id="ipaddr" class="ocf" type="IPaddr" provider="heartbeat">
> <operations>
> <op id="ipaddr:monitor" name="monitor" start_delay="30s" interval="25s" on_fail="fence"/>
> </operations>
> <instance_attributes id="ia_ipaddr">
> <attributes>
> <nvpair id="ia_ipaddr_ip" name="ip" value="172.17.246.10"/>
> <nvpair id="ia_ipaddr_nic" name="nic" value="eth0"/>
> <nvpair id="ia_ipaddr_netmask" name="netmask" value="16"/>
> </attributes>
> </instance_attributes>
> </primitive>
> <primitive id="apache" class="ocf" type="apache" provider="heartbeat">
> <operations>
> <op id="apache:monitor" name="monitor" start_delay="30s" interval="10s" on_fail="fence"/>
> </operations>
> <instance_attributes id="ia_apache">
> <attributes>
> <nvpair id="ia_apache_configfile" name="configfile" value="/share/httpd.conf"/>
> </attributes>
> </instance_attributes>
> </primitive>
> </group>
> <primitive id="kill_domu1" class="stonith" type="external/ssh" provider="heartbeat">
> <instance_attributes id="kill_domu1:attrs">
> <attributes>
> <nvpair id="kill_domu1:hostlist" name="hostlist" value="domu1"/>
> </attributes>
> </instance_attributes>
> </primitive>
> </resources>
> <constraints>
> <rsc_location id="rloc_gr1" rsc="gr1">
> <rule id="rloc_domu1:rule1" score="INFINITY">
> <expression id="rlocl_domu1:rule1:expr1" attribute="#uname" operation="eq" value="domu1"/>
> </rule>
> <rule id="rloc_domu1:rule2" score="0">
> <expression id="rlocl_domu1:rule2:expr1" attribute="#uname" operation="ne" value="domu1"/>
> </rule>
> </rsc_location>
> <rsc_location id="rloc_domu4" rsc="kill_domu1">
> <rule id="rloc_domu4:rule1" score="INFINITY">
> <expression id="rlocl_domu4:rule1:expr1" attribute="#uname" operation="eq" value="domu4"/>
> </rule>
> <rule id="rloc_domu4:rule2" score="-INFINITY">
> <expression id="rlocl_domu4:rule2:expr1" attribute="#uname" operation="ne" value="domu4"/>
> </rule>
> </rsc_location>
> </constraints>
> </configuration>
> </cib>
> --- iscsi.orig 2008-01-11 09:20:33.000000000 +0900
> +++ iscsi 2008-01-11 09:20:03.000000000 +0900
> @@ -32,6 +32,7 @@
> # OCF_RESKEY_target: the iSCSI target (required)
> # OCF_RESKEY_iscsiadm: iscsiadm program path (optional)
> # OCF_RESKEY_discovery_type: discovery type (optional; default: sendtargets)
> +# OCF_RESKEY_start_wait: the wait time after iscsi service started (optional; should be the decimal integer and unit is second)
> #
> # Initialization:
>
> @@ -256,6 +257,10 @@
> *) ;;
> esac
> if iscsi_status; then
> + if [ -n $OCF_RESKEY_start_wait ] ; then
> + ocf_log info "iscsi RA waits for $OCF_RESKEY_start_wait sec."
> + sleep $OCF_RESKEY_start_wait
> + fi
> return $OCF_SUCCESS
> else
> return $OCF_ERR_GENERIC
> _______________________________________________________
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