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[root@node2 ~]# cat /proc/version Linux version 2.6.32-220.el6.x86_64 (mockbuild@x86-004.build.bos.redhat.com) (gcc version 4.4.5 20110214 (Red Hat 4.4.5-6) (GCC) ) #1 SMP Wed Nov 9 08:03:13 EST 2011[root@node2 ~]#最近碰到了点小麻烦，修改了/etc/iscsi/iscsid.conf里面的timeout参数，但是重启iscsi确不能使之生效。

修改过的配置文件与当前生效参数：[root@node2 iscsi]# grep -i timeout /etc/iscsi/iscsid.conf  | grep -v '#'node.session.timeo.replacement_timeout = 2node.conn[0].timeo.login_timeout = 2node.conn[0].timeo.logout_timeout = 2node.conn[0].timeo.noop_out_timeout = 2node.session.err_timeo.abort_timeout = 2node.session.err_timeo.lu_reset_timeout = 2node.session.err_timeo.tgt_reset_timeout = 2[root@node2 iscsi]# iscsiadm -m session -P3 | grep -i timeout Timeouts: Recovery Timeout: 120 Target Reset Timeout: 30 LUN Reset Timeout: 30 Abort Timeout: 15 Timeouts: Recovery Timeout: 120 Target Reset Timeout: 30 LUN Reset Timeout: 30 Abort Timeout: 15[root@node2 iscsi]# iscsiadm -m node -T iqn.2012-04.com.example.cluster20:clusterstorage | grep timeoutnode.session.timeo.replacement_timeout = 120node.session.err_timeo.abort_timeout = 15node.session.err_timeo.lu_reset_timeout = 30node.session.err_timeo.tgt_reset_timeout = 30node.session.err_timeo.host_reset_timeout = 60node.conn[0].timeo.logout_timeout = 15node.conn[0].timeo.login_timeout = 15node.conn[0].timeo.auth_timeout = 45node.conn[0].timeo.noop_out_timeout = 5node.session.timeo.replacement_timeout = 120node.session.err_timeo.abort_timeout = 15node.session.err_timeo.lu_reset_timeout = 30node.session.err_timeo.tgt_reset_timeout = 30node.session.err_timeo.host_reset_timeout = 60node.conn[0].timeo.logout_timeout = 15node.conn[0].timeo.login_timeout = 15node.conn[0].timeo.auth_timeout = 45node.conn[0].timeo.noop_out_timeout = 5重启iscsi依然不能使修改生效：[root@node2 iscsi]# /etc/init.d/iscsi restartStopping iscsi:                                            [  OK  ]Starting iscsi:                                            [  OK  ][root@node2 iscsi]# iscsiadm -m session -P3 | grep -i timeout Timeouts: Recovery Timeout: 120 Target Reset Timeout: 30 LUN Reset Timeout: 30 Abort Timeout: 15 Timeouts: Recovery Timeout: 120 Target Reset Timeout: 30 LUN Reset Timeout: 30 Abort Timeout: 15[root@node2 iscsi]# iscsiadm -m node -T iqn.2012-04.com.example.cluster20:clusterstorage | grep timeoutnode.session.timeo.replacement_timeout = 120node.session.err_timeo.abort_timeout = 15node.session.err_timeo.lu_reset_timeout = 30node.session.err_timeo.tgt_reset_timeout = 30node.session.err_timeo.host_reset_timeout = 60node.conn[0].timeo.logout_timeout = 15node.conn[0].timeo.login_timeout = 15node.conn[0].timeo.auth_timeout = 45node.conn[0].timeo.noop_out_timeout = 5node.session.timeo.replacement_timeout = 120node.session.err_timeo.abort_timeout = 15node.session.err_timeo.lu_reset_timeout = 30node.session.err_timeo.tgt_reset_timeout = 30node.session.err_timeo.host_reset_timeout = 60node.conn[0].timeo.logout_timeout = 15node.conn[0].timeo.login_timeout = 15node.conn[0].timeo.auth_timeout = 45node.conn[0].timeo.noop_out_timeout = 5原来客户端配置文件iscsid.conf的参数只在discovery的时候才被读取，如果没在discovery之前改好配置文件，要使配置文件里的参数生效就只能重新discovery一遍了。

删除discovery并重新discovery，这里一个target之所以有两个portal是因为启用了多路径multipath：[root@node2 iscsi]# iscsiadm -m discovery -P3 SENDTARGETS:DiscoveryAddress: 172.18.20.4,3260Target: iqn.2012-04.com.example.cluster20:clusterstorage Portal: 172.18.20.4:3260,1 Iface Name: defaultDiscoveryAddress: 172.19.20.4,3260Target: iqn.2012-04.com.example.cluster20:clusterstorage Portal: 172.19.20.4:3260,1 Iface Name: defaultDiscoveryAddress: 172.17.20.4,3260iSNS:No targets found.STATIC:No targets found.FIRMWARE:No targets found.[root@node2 iscsi]# iscsiadm -m discovery -p 172.18.20.4 -o delete[root@node2 iscsi]# iscsiadm -m discovery -p 172.19.20.4 -o delete[root@node2 iscsi]# iscsiadm -m discovery -P3 SENDTARGETS:DiscoveryAddress: 172.17.20.4,3260iSNS:No targets found.STATIC:No targets found.FIRMWARE:No targets found.[root@node2 iscsi]# iscsiadm -m discovery -p 172.17.20.4 -o delete  #这个是没有target的portal，为了整洁一起删掉[root@node2 iscsi]# iscsiadm -m discovery -P3 SENDTARGETS:No targets found.iSNS:No targets found.STATIC:No targets found.FIRMWARE:No targets found.[root@node2 iscsi]# iscsiadm -m discovery -t sendtargets -p 172.18.20.4172.18.20.4:3260,1 iqn.2012-04.com.example.cluster20:clusterstorage[root@node2 iscsi]# iscsiadm -m discovery -t sendtargets -p 172.19.20.4172.19.20.4:3260,1 iqn.2012-04.com.example.cluster20:clusterstorage[root@node2 iscsi]# iscsiadm -m discovery -P3 SENDTARGETS:DiscoveryAddress: 172.18.20.4,3260Target: iqn.2012-04.com.example.cluster20:clusterstorage Portal: 172.18.20.4:3260,1 Iface Name: defaultDiscoveryAddress: 172.19.20.4,3260Target: iqn.2012-04.com.example.cluster20:clusterstorage Portal: 172.19.20.4:3260,1 Iface Name: defaultiSNS:No targets found.STATIC:No targets found.FIRMWARE:No targets found.[root@node2 iscsi]# iscsiadm -m node -T iqn.2012-04.com.example.cluster20:clusterstorage -lnode列出的参数已经生效了，但是session参数还是没变，原因是session没有重新login：[root@node2 iscsi]# iscsiadm -m session -P3 | grep -i timeout Timeouts: Recovery Timeout: 120 Target Reset Timeout: 30 LUN Reset Timeout: 30 Abort Timeout: 15 Timeouts: Recovery Timeout: 120 Target Reset Timeout: 30 LUN Reset Timeout: 30 Abort Timeout: 15[root@node2 iscsi]# iscsiadm -m node -T iqn.2012-04.com.example.cluster20:clusterstorage | grep timeoutnode.session.timeo.replacement_timeout = 2node.session.err_timeo.abort_timeout = 2node.session.err_timeo.lu_reset_timeout = 2node.session.err_timeo.tgt_reset_timeout = 2node.session.err_timeo.host_reset_timeout = 60node.conn[0].timeo.logout_timeout = 2node.conn[0].timeo.login_timeout = 2node.conn[0].timeo.auth_timeout = 45node.conn[0].timeo.noop_out_timeout = 2node.session.timeo.replacement_timeout = 2node.session.err_timeo.abort_timeout = 2node.session.err_timeo.lu_reset_timeout = 2node.session.err_timeo.tgt_reset_timeout = 2node.session.err_timeo.host_reset_timeout = 60node.conn[0].timeo.logout_timeout = 2node.conn[0].timeo.login_timeout = 2node.conn[0].timeo.auth_timeout = 45node.conn[0].timeo.noop_out_timeout = 2session重新login后，参数也生效了：[root@node2 iscsi]# iscsiadm -m session -P0tcp: [7] 172.19.20.4:3260,1 iqn.2012-04.com.example.cluster20:clusterstoragetcp: [8] 172.18.20.4:3260,1 iqn.2012-04.com.example.cluster20:clusterstorage[root@node2 iscsi]# iscsiadm -m node -T iqn.2012-04.com.example.cluster20:clusterstorage -uLogging out of session [sid: 7, target: iqn.2012-04.com.example.cluster20:clusterstorage, portal: 172.19.20.4,3260]Logging out of session [sid: 8, target: iqn.2012-04.com.example.cluster20:clusterstorage, portal: 172.18.20.4,3260]Logout of [sid: 7, target: iqn.2012-04.com.example.cluster20:clusterstorage, portal: 172.19.20.4,3260] successful.Logout of [sid: 8, target: iqn.2012-04.com.example.cluster20:clusterstorage, portal: 172.18.20.4,3260] successful.[root@node2 iscsi]# iscsiadm -m session -P0iscsiadm: No active sessions.[root@node2 iscsi]# iscsiadm -m node -T iqn.2012-04.com.example.cluster20:clusterstorage -lLogging in to [iface: default, target: iqn.2012-04.com.example.cluster20:clusterstorage, portal: 172.19.20.4,3260] (multiple)Logging in to [iface: default, target: iqn.2012-04.com.example.cluster20:clusterstorage, portal: 172.18.20.4,3260] (multiple)Login to [iface: default, target: iqn.2012-04.com.example.cluster20:clusterstorage, portal: 172.19.20.4,3260] successful.Login to [iface: default, target: iqn.2012-04.com.example.cluster20:clusterstorage, portal: 172.18.20.4,3260] successful.[root@node2 iscsi]# iscsiadm -m session -P0tcp: [10] 172.18.20.4:3260,1 iqn.2012-04.com.example.cluster20:clusterstoragetcp: [9] 172.19.20.4:3260,1 iqn.2012-04.com.example.cluster20:clusterstorage[root@node2 iscsi]# iscsiadm -m session -P3 | grep -i timeout Timeouts: Recovery Timeout: 2 Target Reset Timeout: 2 LUN Reset Timeout: 2 Abort Timeout: 2 Timeouts: Recovery Timeout: 2 Target Reset Timeout: 2 LUN Reset Timeout: 2 Abort Timeout: 2[root@node2 iscsi]# iscsiadm -m node -T iqn.2012-04.com.example.cluster20:clusterstorage | grep timeoutnode.session.timeo.replacement_timeout = 2node.session.err_timeo.abort_timeout = 2node.session.err_timeo.lu_reset_timeout = 2node.session.err_timeo.tgt_reset_timeout = 2node.session.err_timeo.host_reset_timeout = 60node.conn[0].timeo.logout_timeout = 2node.conn[0].timeo.login_timeout = 2node.conn[0].timeo.auth_timeout = 45node.conn[0].timeo.noop_out_timeout = 2node.session.timeo.replacement_timeout = 2node.session.err_timeo.abort_timeout = 2node.session.err_timeo.lu_reset_timeout = 2node.session.err_timeo.tgt_reset_timeout = 2node.session.err_timeo.host_reset_timeout = 60node.conn[0].timeo.logout_timeout = 2node.conn[0].timeo.login_timeout = 2node.conn[0].timeo.auth_timeout = 45node.conn[0].timeo.noop_out_timeout = 2[root@node2 iscsi]# 单独命令列表：

grep -i timeout /etc/iscsi/iscsid.conf  | grep -v '#'iscsiadm -m session -P3 | grep -i timeoutiscsiadm -m node -T iqn.2012-04.com.example.cluster20:clusterstorage | grep timeout/etc/init.d/iscsi restartiscsiadm -m session -P3 | grep -i timeoutiscsiadm -m node -T iqn.2012-04.com.example.cluster20:clusterstorage | grep timeoutiscsiadm -m discovery -P3 iscsiadm -m discovery -p 172.18.20.4 -o deleteiscsiadm -m discovery -p 172.19.20.4 -o deleteiscsiadm -m discovery -P3 iscsiadm -m discovery -t sendtargets -p 172.18.20.4iscsiadm -m discovery -t sendtargets -p 172.19.20.4iscsiadm -m discovery -P3 iscsiadm -m session -P0iscsiadm -m node -T iqn.2012-04.com.example.cluster20:clusterstorage -uiscsiadm -m session -P0iscsiadm -m node -T iqn.2012-04.com.example.cluster20:clusterstorage -liscsiadm -m session -P0iscsiadm -m session -P3 | grep -i timeoutiscsiadm -m node -T iqn.2012-04.com.example.cluster20:clusterstorage | grep timeout

REF：

1. Timeout settings not working?

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