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slow performance on company production server I need help
by Christopher Wensink 22 Apr '20

22 Apr '20

Hello Everyone, Since rebooting my Centos 6.10 Openvz server "daisy" yesterday, I am getting horrible system performance. /var/log/messages is full of HDIO_GET_IDENTITY failed for /dev/sdb. The latest entries look like this: Apr 22 08:51:32 daisy kernel: [141224.655699] CT: 1005: stopped Apr 22 08:55:04 daisy ata_id[21513]: HDIO_GET_IDENTITY failed for '/dev/sdb' Apr 22 09:00:05 daisy ata_id[21584]: HDIO_GET_IDENTITY failed for '/dev/sdb' Apr 22 09:05:02 daisy ata_id[21644]: HDIO_GET_IDENTITY failed for '/dev/sdb' Apr 22 09:10:01 daisy ata_id[22282]: HDIO_GET_IDENTITY failed for '/dev/sdb' Apr 22 09:11:49 daisy kernel: [142441.721065] INFO: task hdparm:22246 blocked for more than 120 seconds. Apr 22 09:11:49 daisy kernel: [142441.721083] Not tainted 2.6.32-042stab142.1 #1 Apr 22 09:11:49 daisy kernel: [142441.721093] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Apr 22 09:11:49 daisy kernel: [142441.721109] hdparm D ffff88000c778300 0 22246 20845 0 0x00000080 Apr 22 09:11:49 daisy kernel: [142441.721115] ffff88006654bcb8 0000000000000086 ffffffff8114f130 ffff88002821fa40 Apr 22 09:11:49 daisy kernel: [142441.721121] ffff88000004d238 ffff88006654bd70 ffff88006654bc88 ffffea00016ab7c0 Apr 22 09:11:49 daisy kernel: [142441.721125] ffff88011a707000 ffff880028321168 000000000001b7ea 0000816be9b3faa2 Apr 22 09:11:49 daisy kernel: [142441.721130] Call Trace: Apr 22 09:11:49 daisy kernel: [142441.721139] [<ffffffff8114f130>] ? sync_page+0x0/0x50 Apr 22 09:11:49 daisy kernel: [142441.721144] [<ffffffff8107c851>] ? update_curr+0xe1/0x1f0 Apr 22 09:11:49 daisy kernel: [142441.721149] [<ffffffff81566c55>] schedule_timeout+0x215/0x2f0 Apr 22 09:11:49 daisy kernel: [142441.721155] [<ffffffff81067432>] ? check_preempt_curr+0x82/0xa0 Apr 22 09:11:49 daisy kernel: [142441.721159] [<ffffffff815669b4>] wait_for_completion+0xe4/0x120 Apr 22 09:11:49 daisy kernel: [142441.721162] [<ffffffff81071ce0>] ? default_wake_function+0x0/0x20 Apr 22 09:11:49 daisy kernel: [142441.721167] [<ffffffff815694db>] ? _spin_unlock_bh+0x1b/0x20 Apr 22 09:11:49 daisy kernel: [142441.721172] [<ffffffff811f98d8>] sync_inodes_sb_ub+0xa8/0x1d0 Apr 22 09:11:49 daisy kernel: [142441.721176] [<ffffffff8114fa6f>] ? filemap_fdatawait+0x2f/0x40 Apr 22 09:11:49 daisy kernel: [142441.721181] [<ffffffff81200f85>] __sync_filesystem+0x95/0xa0 Apr 22 09:11:49 daisy kernel: [142441.721184] [<ffffffff8120151d>] sync_filesystems+0x30d/0x350 Apr 22 09:11:49 daisy kernel: [142441.721188] [<ffffffff812016e5>] sys_sync+0x155/0x1a0 Apr 22 09:11:49 daisy kernel: [142441.721192] [<ffffffff81571424>] system_call_fastpath+0x22/0x3a Apr 22 09:13:49 daisy kernel: [142561.721069] INFO: task hdparm:22246 blocked for more than 120 seconds. Apr 22 09:13:49 daisy kernel: [142561.721087] Not tainted 2.6.32-042stab142.1 #1 Apr 22 09:13:49 daisy kernel: [142561.721096] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Apr 22 09:13:49 daisy kernel: [142561.721112] hdparm D ffff88000c778300 0 22246 20845 0 0x00000080 Apr 22 09:13:49 daisy kernel: [142561.721118] ffff88006654bcb8 0000000000000086 ffffffff8114f130 ffff88002821fa40 Apr 22 09:13:49 daisy kernel: [142561.721123] ffff88000004d238 ffff88006654bd70 ffff88006654bc88 ffffea00016ab7c0 Apr 22 09:13:49 daisy kernel: [142561.721128] ffff88011a707000 ffff880028321168 000000000001b7ea 0000816be9b3faa2 Apr 22 09:13:49 daisy kernel: [142561.721133] Call Trace: Apr 22 09:13:49 daisy kernel: [142561.721142] [<ffffffff8114f130>] ? sync_page+0x0/0x50 Apr 22 09:13:49 daisy kernel: [142561.721148] [<ffffffff8107c851>] ? update_curr+0xe1/0x1f0 Apr 22 09:13:49 daisy kernel: [142561.721153] [<ffffffff81566c55>] schedule_timeout+0x215/0x2f0 Apr 22 09:13:49 daisy kernel: [142561.721158] [<ffffffff81067432>] ? check_preempt_curr+0x82/0xa0 Apr 22 09:13:49 daisy kernel: [142561.721162] [<ffffffff815669b4>] wait_for_completion+0xe4/0x120 Apr 22 09:13:49 daisy kernel: [142561.721166] [<ffffffff81071ce0>] ? default_wake_function+0x0/0x20 Apr 22 09:13:49 daisy kernel: [142561.721170] [<ffffffff815694db>] ? _spin_unlock_bh+0x1b/0x20 Apr 22 09:13:49 daisy kernel: [142561.721176] [<ffffffff811f98d8>] sync_inodes_sb_ub+0xa8/0x1d0 Apr 22 09:13:49 daisy kernel: [142561.721180] [<ffffffff8114fa6f>] ? filemap_fdatawait+0x2f/0x40 Apr 22 09:13:49 daisy kernel: [142561.721184] [<ffffffff81200f85>] __sync_filesystem+0x95/0xa0 Apr 22 09:13:49 daisy kernel: [142561.721188] [<ffffffff8120151d>] sync_filesystems+0x30d/0x350 Apr 22 09:13:49 daisy kernel: [142561.721192] [<ffffffff812016e5>] sys_sync+0x155/0x1a0 Apr 22 09:13:49 daisy kernel: [142561.721196] [<ffffffff81571424>] system_call_fastpath+0x22/0x3a Apr 22 09:15:06 daisy ata_id[22299]: HDIO_GET_IDENTITY failed for '/dev/sdb' Apr 22 09:15:49 daisy kernel: [142681.721085] INFO: task hdparm:22246 blocked for more than 120 seconds. Apr 22 09:15:49 daisy kernel: [142681.721104] Not tainted 2.6.32-042stab142.1 #1 Apr 22 09:15:49 daisy kernel: [142681.721113] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Apr 22 09:15:49 daisy kernel: [142681.721129] hdparm D ffff88000c778300 0 22246 20845 0 0x00000080 Apr 22 09:15:49 daisy kernel: [142681.721136] ffff88006654bcb8 0000000000000086 ffffffff8114f130 ffff88002821fa40 Apr 22 09:15:49 daisy kernel: [142681.721141] ffff88000004d238 ffff88006654bd70 ffff88006654bc88 ffffea00016ab7c0 Apr 22 09:15:49 daisy kernel: [142681.721146] ffff88011a707000 ffff880028321168 000000000001b7ea 0000816be9b3faa2 Apr 22 09:15:49 daisy kernel: [142681.721150] Call Trace: Apr 22 09:15:49 daisy kernel: [142681.721160] [<ffffffff8114f130>] ? sync_page+0x0/0x50 Apr 22 09:15:49 daisy kernel: [142681.721166] [<ffffffff8107c851>] ? update_curr+0xe1/0x1f0 Apr 22 09:15:49 daisy kernel: [142681.721172] [<ffffffff81566c55>] schedule_timeout+0x215/0x2f0 Apr 22 09:15:49 daisy kernel: [142681.721178] [<ffffffff81067432>] ? check_preempt_curr+0x82/0xa0 Apr 22 09:15:49 daisy kernel: [142681.721182] [<ffffffff815669b4>] wait_for_completion+0xe4/0x120 Apr 22 09:15:49 daisy kernel: [142681.721185] [<ffffffff81071ce0>] ? default_wake_function+0x0/0x20 Apr 22 09:15:49 daisy kernel: [142681.721190] [<ffffffff815694db>] ? _spin_unlock_bh+0x1b/0x20 Apr 22 09:15:49 daisy kernel: [142681.721196] [<ffffffff811f98d8>] sync_inodes_sb_ub+0xa8/0x1d0 Apr 22 09:15:49 daisy kernel: [142681.721200] [<ffffffff8114fa6f>] ? filemap_fdatawait+0x2f/0x40 Apr 22 09:15:49 daisy kernel: [142681.721204] [<ffffffff81200f85>] __sync_filesystem+0x95/0xa0 Apr 22 09:15:49 daisy kernel: [142681.721208] [<ffffffff8120151d>] sync_filesystems+0x30d/0x350 Apr 22 09:15:49 daisy kernel: [142681.721212] [<ffffffff812016e5>] sys_sync+0x155/0x1a0 Apr 22 09:15:49 daisy kernel: [142681.721217] [<ffffffff81571424>] system_call_fastpath+0x22/0x3a Apr 22 09:17:49 daisy kernel: [142801.721064] INFO: task hdparm:22246 blocked for more than 120 seconds. Apr 22 09:17:49 daisy kernel: [142801.721082] Not tainted 2.6.32-042stab142.1 #1 Apr 22 09:17:49 daisy kernel: [142801.721091] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Apr 22 09:17:49 daisy kernel: [142801.721107] hdparm D ffff88000c778300 0 22246 20845 0 0x00000080 Apr 22 09:17:49 daisy kernel: [142801.721114] ffff88006654bcb8 0000000000000086 ffffffff8114f130 ffff88002821fa40 Apr 22 09:17:49 daisy kernel: [142801.721119] ffff88000004d238 ffff88006654bd70 ffff88006654bc88 ffffea00016ab7c0 Apr 22 09:17:49 daisy kernel: [142801.721124] ffff88011a707000 ffff880028321168 000000000001b7ea 0000816be9b3faa2 Apr 22 09:17:49 daisy kernel: [142801.721128] Call Trace: Apr 22 09:17:49 daisy kernel: [142801.721137] [<ffffffff8114f130>] ? sync_page+0x0/0x50 Apr 22 09:17:49 daisy kernel: [142801.721143] [<ffffffff8107c851>] ? update_curr+0xe1/0x1f0 Apr 22 09:17:49 daisy kernel: [142801.721149] [<ffffffff81566c55>] schedule_timeout+0x215/0x2f0 Apr 22 09:17:49 daisy kernel: [142801.721154] [<ffffffff81067432>] ? check_preempt_curr+0x82/0xa0 Apr 22 09:17:49 daisy kernel: [142801.721158] [<ffffffff815669b4>] wait_for_completion+0xe4/0x120 Apr 22 09:17:49 daisy kernel: [142801.721162] [<ffffffff81071ce0>] ? default_wake_function+0x0/0x20 Apr 22 09:17:49 daisy kernel: [142801.721166] [<ffffffff815694db>] ? _spin_unlock_bh+0x1b/0x20 Apr 22 09:17:49 daisy kernel: [142801.721172] [<ffffffff811f98d8>] sync_inodes_sb_ub+0xa8/0x1d0 Apr 22 09:17:49 daisy kernel: [142801.721176] [<ffffffff8114fa6f>] ? filemap_fdatawait+0x2f/0x40 Apr 22 09:17:49 daisy kernel: [142801.721180] [<ffffffff81200f85>] __sync_filesystem+0x95/0xa0 Apr 22 09:17:49 daisy kernel: [142801.721184] [<ffffffff8120151d>] sync_filesystems+0x30d/0x350 Apr 22 09:17:49 daisy kernel: [142801.721188] [<ffffffff812016e5>] sys_sync+0x155/0x1a0 Apr 22 09:17:49 daisy kernel: [142801.721192] [<ffffffff81571424>] system_call_fastpath+0x22/0x3a Apr 22 09:20:01 daisy ata_id[22405]: HDIO_GET_IDENTITY failed for '/dev/sdb' Apr 22 09:21:49 daisy kernel: [143041.721494] INFO: task hdparm:22246 blocked for more than 120 seconds. Apr 22 09:21:49 daisy kernel: [143041.721512] Not tainted 2.6.32-042stab142.1 #1 Apr 22 09:21:49 daisy kernel: [143041.721522] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Apr 22 09:21:49 daisy kernel: [143041.721691] hdparm D ffff88000c778300 0 22246 20845 0 0x00000080 Apr 22 09:21:49 daisy kernel: [143041.721697] ffff88006654bcc8 0000000000000086 ffff88006654bc58 ffffffff810098af Apr 22 09:21:49 daisy kernel: [143041.721702] ffff880028200000 000000001a42f238 ffff8800110101c0 ffff88011a42f200 Apr 22 09:21:49 daisy kernel: [143041.721706] ffff88006654bc68 ffffffff8107bbfe ffff8800110101c0 0000000000000000 Apr 22 09:21:49 daisy kernel: [143041.721711] Call Trace: Apr 22 09:21:49 daisy kernel: [143041.721720] [<ffffffff810098af>] ? __switch_to+0x16f/0x470 Apr 22 09:21:49 daisy kernel: [143041.721726] [<ffffffff8107bbfe>] ? finish_task_switch+0xce/0x120 Apr 22 09:21:49 daisy kernel: [143041.721730] [<ffffffff8107c851>] ? update_curr+0xe1/0x1f0 Apr 22 09:21:49 daisy kernel: [143041.721735] [<ffffffff81566c55>] schedule_timeout+0x215/0x2f0 Apr 22 09:21:49 daisy kernel: [143041.721739] [<ffffffff815669b4>] wait_for_completion+0xe4/0x120 Apr 22 09:21:49 daisy kernel: [143041.721743] [<ffffffff81071ce0>] ? default_wake_function+0x0/0x20 Apr 22 09:21:49 daisy kernel: [143041.721747] [<ffffffff815694db>] ? _spin_unlock_bh+0x1b/0x20 Apr 22 09:21:49 daisy kernel: [143041.721753] [<ffffffff811f9773>] writeback_inodes_sb_nr_ub+0x83/0xb0 Apr 22 09:21:49 daisy kernel: [143041.721757] [<ffffffff811f9806>] writeback_inodes_sb_ub+0x46/0x50 Apr 22 09:21:49 daisy kernel: [143041.721762] [<ffffffff81200f38>] __sync_filesystem+0x48/0xa0 Apr 22 09:21:49 daisy kernel: [143041.721765] [<ffffffff8120151d>] sync_filesystems+0x30d/0x350 Apr 22 09:21:49 daisy kernel: [143041.721769] [<ffffffff812016d8>] sys_sync+0x148/0x1a0 Apr 22 09:21:49 daisy kernel: [143041.721773] [<ffffffff81571424>] system_call_fastpath+0x22/0x3a Apr 22 09:23:49 daisy kernel: [143161.721064] INFO: task hdparm:22246 blocked for more than 120 seconds. Apr 22 09:23:49 daisy kernel: [143161.721169] Not tainted 2.6.32-042stab142.1 #1 Apr 22 09:23:49 daisy kernel: [143161.721259] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Apr 22 09:23:49 daisy kernel: [143161.721430] hdparm D ffff88000c778300 0 22246 20845 0 0x00000080 Apr 22 09:23:49 daisy kernel: [143161.721437] ffff88006654bcc8 0000000000000086 ffff88006654bc58 ffffffff810098af Apr 22 09:23:49 daisy kernel: [143161.721442] ffff880028200000 000000001a42f238 ffff8800110101c0 ffff88011a42f200 Apr 22 09:23:49 daisy kernel: [143161.721447] ffff88006654bc68 ffffffff8107bbfe ffff8800110101c0 0000000000000000 Apr 22 09:23:49 daisy kernel: [143161.721451] Call Trace: Apr 22 09:23:49 daisy kernel: [143161.721460] [<ffffffff810098af>] ? __switch_to+0x16f/0x470 Apr 22 09:23:49 daisy kernel: [143161.721466] [<ffffffff8107bbfe>] ? finish_task_switch+0xce/0x120 Apr 22 09:23:49 daisy kernel: [143161.721470] [<ffffffff8107c851>] ? update_curr+0xe1/0x1f0 Apr 22 09:23:49 daisy kernel: [143161.721475] [<ffffffff81566c55>] schedule_timeout+0x215/0x2f0 Apr 22 09:23:49 daisy kernel: [143161.721479] [<ffffffff815669b4>] wait_for_completion+0xe4/0x120 Apr 22 09:23:49 daisy kernel: [143161.721483] [<ffffffff81071ce0>] ? default_wake_function+0x0/0x20 Apr 22 09:23:49 daisy kernel: [143161.721487] [<ffffffff815694db>] ? _spin_unlock_bh+0x1b/0x20 Apr 22 09:23:49 daisy kernel: [143161.721493] [<ffffffff811f9773>] writeback_inodes_sb_nr_ub+0x83/0xb0 Apr 22 09:23:49 daisy kernel: [143161.721498] [<ffffffff811f9806>] writeback_inodes_sb_ub+0x46/0x50 Apr 22 09:23:49 daisy kernel: [143161.721502] [<ffffffff81200f38>] __sync_filesystem+0x48/0xa0 Apr 22 09:23:49 daisy kernel: [143161.721506] [<ffffffff8120151d>] sync_filesystems+0x30d/0x350 Apr 22 09:23:49 daisy kernel: [143161.721510] [<ffffffff812016d8>] sys_sync+0x148/0x1a0 Apr 22 09:23:49 daisy kernel: [143161.721514] [<ffffffff81571424>] system_call_fastpath+0x22/0x3a Apr 22 09:25:02 daisy ata_id[22445]: HDIO_GET_IDENTITY failed for '/dev/sdb' Apr 22 09:25:49 daisy kernel: [143281.721066] INFO: task hdparm:22246 blocked for more than 120 seconds. Apr 22 09:25:49 daisy kernel: [143281.721159] Not tainted 2.6.32-042stab142.1 #1 Apr 22 09:25:49 daisy kernel: [143281.721244] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Apr 22 09:25:49 daisy kernel: [143281.721408] hdparm D ffff88000c778300 0 22246 20845 0 0x00000080 Apr 22 09:25:49 daisy kernel: [143281.721415] ffff88006654bcc8 0000000000000086 ffff88006654bc58 ffffffff810098af Apr 22 09:25:49 daisy kernel: [143281.721420] ffff880028200000 000000001a42f238 ffff8800110101c0 ffff88011a42f200 Apr 22 09:25:49 daisy kernel: [143281.721424] ffff88006654bc68 ffffffff8107bbfe ffff8800110101c0 0000000000000000 Apr 22 09:25:49 daisy kernel: [143281.721429] Call Trace: Apr 22 09:25:49 daisy kernel: [143281.721438] [<ffffffff810098af>] ? __switch_to+0x16f/0x470 Apr 22 09:25:49 daisy kernel: [143281.721444] [<ffffffff8107bbfe>] ? finish_task_switch+0xce/0x120 Apr 22 09:25:49 daisy kernel: [143281.721448] [<ffffffff8107c851>] ? update_curr+0xe1/0x1f0 Apr 22 09:25:49 daisy kernel: [143281.721453] [<ffffffff81566c55>] schedule_timeout+0x215/0x2f0 Apr 22 09:25:49 daisy kernel: [143281.721457] [<ffffffff815669b4>] wait_for_completion+0xe4/0x120 Apr 22 09:25:49 daisy kernel: [143281.721461] [<ffffffff81071ce0>] ? default_wake_function+0x0/0x20 Apr 22 09:25:49 daisy kernel: [143281.721465] [<ffffffff815694db>] ? _spin_unlock_bh+0x1b/0x20 Apr 22 09:25:49 daisy kernel: [143281.721471] [<ffffffff811f9773>] writeback_inodes_sb_nr_ub+0x83/0xb0 Apr 22 09:25:49 daisy kernel: [143281.721476] [<ffffffff811f9806>] writeback_inodes_sb_ub+0x46/0x50 Apr 22 09:25:49 daisy kernel: [143281.721480] [<ffffffff81200f38>] __sync_filesystem+0x48/0xa0 Apr 22 09:25:49 daisy kernel: [143281.721484] [<ffffffff8120151d>] sync_filesystems+0x30d/0x350 Apr 22 09:25:49 daisy kernel: [143281.721487] [<ffffffff812016d8>] sys_sync+0x148/0x1a0 Apr 22 09:25:49 daisy kernel: [143281.721492] [<ffffffff81571424>] system_call_fastpath+0x22/0x3a Apr 22 09:27:49 daisy kernel: [143401.721072] INFO: task hdparm:22246 blocked for more than 120 seconds. Apr 22 09:27:49 daisy kernel: [143401.721165] Not tainted 2.6.32-042stab142.1 #1 Apr 22 09:27:49 daisy kernel: [143401.721253] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Apr 22 09:27:49 daisy kernel: [143401.721421] hdparm D ffff88000c778300 0 22246 20845 0 0x00000080 Apr 22 09:27:49 daisy kernel: [143401.721427] ffff88006654bcc8 0000000000000086 ffff88006654bc58 ffffffff810098af Apr 22 09:27:49 daisy kernel: [143401.721432] ffff880028200000 000000001a42f238 ffff8800110101c0 ffff88011a42f200 Apr 22 09:27:49 daisy kernel: [143401.721436] ffff88006654bc68 ffffffff8107bbfe ffff8800110101c0 0000000000000000 Apr 22 09:27:49 daisy kernel: [143401.721441] Call Trace: Apr 22 09:27:49 daisy kernel: [143401.721450] [<ffffffff810098af>] ? __switch_to+0x16f/0x470 Apr 22 09:27:49 daisy kernel: [143401.721456] [<ffffffff8107bbfe>] ? finish_task_switch+0xce/0x120 Apr 22 09:27:49 daisy kernel: [143401.721460] [<ffffffff8107c851>] ? update_curr+0xe1/0x1f0 Apr 22 09:27:49 daisy kernel: [143401.721465] [<ffffffff81566c55>] schedule_timeout+0x215/0x2f0 Apr 22 09:27:49 daisy kernel: [143401.721469] [<ffffffff815669b4>] wait_for_completion+0xe4/0x120 Apr 22 09:27:49 daisy kernel: [143401.721473] [<ffffffff81071ce0>] ? default_wake_function+0x0/0x20 Apr 22 09:27:49 daisy kernel: [143401.721477] [<ffffffff815694db>] ? _spin_unlock_bh+0x1b/0x20 Apr 22 09:27:49 daisy kernel: [143401.721483] [<ffffffff811f9773>] writeback_inodes_sb_nr_ub+0x83/0xb0 Apr 22 09:27:49 daisy kernel: [143401.721487] [<ffffffff811f9806>] writeback_inodes_sb_ub+0x46/0x50 Apr 22 09:27:49 daisy kernel: [143401.721492] [<ffffffff81200f38>] __sync_filesystem+0x48/0xa0 Apr 22 09:27:49 daisy kernel: [143401.721495] [<ffffffff8120151d>] sync_filesystems+0x30d/0x350 Apr 22 09:27:49 daisy kernel: [143401.721499] [<ffffffff812016d8>] sys_sync+0x148/0x1a0 Apr 22 09:27:49 daisy kernel: [143401.721503] [<ffffffff81571424>] system_call_fastpath+0x22/0x3a Apr 22 09:29:49 daisy kernel: [143521.721059] INFO: task hdparm:22246 blocked for more than 120 seconds. Apr 22 09:29:49 daisy kernel: [143521.721158] Not tainted 2.6.32-042stab142.1 #1 Apr 22 09:29:49 daisy kernel: [143521.721245] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Apr 22 09:29:49 daisy kernel: [143521.721415] hdparm D ffff88000c778300 0 22246 20845 0 0x00000084 Apr 22 09:29:49 daisy kernel: [143521.721421] ffff88006654bcc8 0000000000000086 ffff88006654bc58 ffffffff810098af Apr 22 09:29:49 daisy kernel: [143521.721426] ffff880028200000 000000001a42f238 ffff8800110101c0 ffff88011a42f200 Apr 22 09:29:49 daisy kernel: [143521.721431] ffff88006654bc68 ffffffff8107bbfe ffff8800110101c0 0000000000000000 Apr 22 09:29:49 daisy kernel: [143521.721436] Call Trace: Apr 22 09:29:49 daisy kernel: [143521.721445] [<ffffffff810098af>] ? __switch_to+0x16f/0x470 Apr 22 09:29:49 daisy kernel: [143521.721451] [<ffffffff8107bbfe>] ? finish_task_switch+0xce/0x120 Apr 22 09:29:49 daisy kernel: [143521.721455] [<ffffffff8107c851>] ? update_curr+0xe1/0x1f0 Apr 22 09:29:49 daisy kernel: [143521.721460] [<ffffffff81566c55>] schedule_timeout+0x215/0x2f0 Apr 22 09:29:49 daisy kernel: [143521.721465] [<ffffffff815669b4>] wait_for_completion+0xe4/0x120 Apr 22 09:29:49 daisy kernel: [143521.721469] [<ffffffff81071ce0>] ? default_wake_function+0x0/0x20 Apr 22 09:29:49 daisy kernel: [143521.721473] [<ffffffff815694db>] ? _spin_unlock_bh+0x1b/0x20 Apr 22 09:29:49 daisy kernel: [143521.721479] [<ffffffff811f9773>] writeback_inodes_sb_nr_ub+0x83/0xb0 Apr 22 09:29:49 daisy kernel: [143521.721483] [<ffffffff811f9806>] writeback_inodes_sb_ub+0x46/0x50 Apr 22 09:29:49 daisy kernel: [143521.721487] [<ffffffff81200f38>] __sync_filesystem+0x48/0xa0 Apr 22 09:29:49 daisy kernel: [143521.721491] [<ffffffff8120151d>] sync_filesystems+0x30d/0x350 Apr 22 09:29:49 daisy kernel: [143521.721495] [<ffffffff812016d8>] sys_sync+0x148/0x1a0 Apr 22 09:29:49 daisy kernel: [143521.721499] [<ffffffff81571424>] system_call_fastpath+0x22/0x3a Apr 22 09:30:04 daisy ata_id[22489]: HDIO_GET_IDENTITY failed for '/dev/sdb' ------------------ I tried running hdparm -tT /dev/sda, but after waiting 5+ minutes for any command output I cancelled it. I am rsyncing the data from this system over to another system now, clearly something is wrong, but I can't tell what. The system is an older AMD Opteron 180 processor (dual core) 4 GB ram, RAID controller with RAID 5 set up with 4x 4TB Western Digital Drives. I rebooted the system day before yesterday, and that's when the timeout messages started pouring into the log. when I run tw_cli /c8 show, all four drives say they are ok [root@daisy cron.daily]# tw_cli /c8 show Unit UnitType Status %RCmpl %V/I/M Stripe Size(GB) Cache AVrfy ------------------------------------------------------------------------------ u0 RAID-5 OK - - 256K 11175.8 Ri ON VPort Status Unit Size Type Phy Encl-Slot Model ------------------------------------------------------------------------------ p0 OK u0 3.63 TB SATA 0 - WDC WD4005FZBX-00K5 p1 OK u0 3.63 TB SATA 1 - WDC WD4005FZBX-00K5 p2 OK u0 3.63 TB SATA 2 - WDC WD4005FZBX-00K5 p3 OK u0 3.63 TB SATA 3 - WDC WD4005FZBX-00K5 Logical Volumes appear active: [root@daisy cron.daily]# lvscan ACTIVE '/dev/vg_daisy/lv_root' [10.89 TiB] inherit ACTIVE '/dev/vg_daisy/lv_swap' [3.88 GiB] inherit ACTIVE '/dev/vg_daisy/lv_home' [20.00 GiB] inherit [root@daisy cron.daily]# [root@daisy cron.daily]# lvmdiskscan /dev/ram0 [ 16.00 MiB] /dev/root [ 10.89 TiB] /dev/ram1 [ 16.00 MiB] /dev/sda1 [ 2.82 TiB] /dev/vg_daisy/lv_swap [ 3.88 GiB] /dev/ram2 [ 16.00 MiB] /dev/vg_daisy/lv_home [ 20.00 GiB] /dev/ram3 [ 16.00 MiB] /dev/sda3 [ 842.87 GiB] /dev/ram4 [ 16.00 MiB] /dev/ram5 [ 16.00 MiB] /dev/ram6 [ 16.00 MiB] /dev/ram7 [ 16.00 MiB] /dev/ram8 [ 16.00 MiB] /dev/ram9 [ 16.00 MiB] /dev/ram10 [ 16.00 MiB] /dev/ram11 [ 16.00 MiB] /dev/ram12 [ 16.00 MiB] /dev/ram13 [ 16.00 MiB] /dev/ram14 [ 16.00 MiB] /dev/ram15 [ 16.00 MiB] /dev/sdb1 [ 1.82 TiB] LVM physical volume /dev/sdc1 [ 500.00 MiB] /dev/sdc2 [ 4.00 TiB] LVM physical volume /dev/sdd1 [ 4.00 TiB] LVM physical volume /dev/sde1 [ 2.91 TiB] LVM physical volume 3 disks 19 partitions 0 LVM physical volume whole disks 4 LVM physical volumes [root@daisy cron.daily]# grub.conf: [root@daisy grub]# cat grub.conf # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/mapper/vg_daisy-lv_root # initrd /initrd-[generic-]version.img #boot=/dev/sdb default=0 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title OpenVZ (2.6.32-042stab142.1) root (hd0,0) kernel /vmlinuz-2.6.32-042stab142.1 ro root=/dev/mapper/vg_daisy-lv_root rd_NO_LUKS rd_LVM_LV=vg_daisy/lv_swap LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=vg_daisy/lv_root KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /initramfs-2.6.32-042stab142.1.img title OpenVZ (2.6.32-042stab141.3) root (hd0,0) kernel /vmlinuz-2.6.32-042stab141.3 ro root=/dev/mapper/vg_daisy-lv_root rd_NO_LUKS rd_LVM_LV=vg_daisy/lv_swap LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=vg_daisy/lv_root KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /initramfs-2.6.32-042stab141.3.img title OpenVZ (2.6.32-042stab140.4) root (hd0,0) kernel /vmlinuz-2.6.32-042stab140.4 ro root=/dev/mapper/vg_daisy-lv_root rd_NO_LUKS rd_LVM_LV=vg_daisy/lv_swap LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=vg_daisy/lv_root KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /initramfs-2.6.32-042stab140.4.img title OpenVZ (2.6.32-042stab140.1) root (hd0,0) kernel /vmlinuz-2.6.32-042stab140.1 ro root=/dev/mapper/vg_daisy-lv_root rd_NO_LUKS rd_LVM_LV=vg_daisy/lv_swap LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=vg_daisy/lv_root KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /initramfs-2.6.32-042stab140.1.img title OpenVZ (2.6.32-042stab139.1) root (hd0,0) kernel /vmlinuz-2.6.32-042stab139.1 ro root=/dev/mapper/vg_daisy-lv_root rd_NO_LUKS rd_LVM_LV=vg_daisy/lv_swap LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=vg_daisy/lv_root KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /initramfs-2.6.32-042stab139.1.img title CentOS 6 (2.6.32-754.el6.x86_64) root (hd0,0) kernel /vmlinuz-2.6.32-754.el6.x86_64 ro root=/dev/mapper/vg_daisy-lv_root rd_NO_LUKS rd_LVM_LV=vg_daisy/lv_swap LANG=en_US.UTF-8 rd_NO_MD SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=vg_daisy/lv_root KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet initrd /initramfs-2.6.32-754.el6.x86_64.img ------------- Top is not showing anything out of the ordinary: ---------- [root@daisy grub]# top - 09:41:57 up 1 day, 16:04, 3 users, load average: 5.89, 5.83, 5.43 Tasks: 369 total, 1 running, 368 sleeping, 0 stopped, 0 zombie Cpu(s): 0.2%us, 1.2%sy, 0.0%ni, 25.0%id, 73.5%wa, 0.0%hi, 0.2%si, 0.0%st Mem: 3894628k total, 3861280k used, 33348k free, 95608k buffers Swap: 4063228k total, 34888k used, 4028340k free, 3139272k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1266 root 20 0 0 0 0 D 1.0 0.0 12:27.75 flush-253:0 21041 1153 20 0 3188 1840 1012 D 0.7 0.0 0:00.72 imap 21599 97 20 0 5160 1940 1568 S 0.7 0.0 0:01.06 imap-login 22636 root 20 0 15272 1524 964 R 0.7 0.0 0:00.06 top 1977 root 20 0 2096 644 360 S 0.3 0.0 0:27.92 dovecot 22528 97 20 0 5160 2044 1672 S 0.3 0.1 0:00.35 imap-login 22578 1155 20 0 2904 1528 940 D 0.3 0.0 0:00.22 imap 1 root 20 0 19236 268 136 S 0.0 0.0 0:00.68 init 2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd 3 root RT 0 0 0 0 S 0.0 0.0 0:00.04 migration/0 4 root 20 0 0 0 0 S 0.0 0.0 0:01.88 ksoftirqd/0 5 root RT 0 0 0 0 S 0.0 0.0 0:00.00 stopper/0 6 root RT 0 0 0 0 S 0.0 0.0 0:00.19 watchdog/0 7 root RT 0 0 0 0 S 0.0 0.0 0:00.07 migration/1 8 root RT 0 0 0 0 S 0.0 0.0 0:00.00 stopper/1 9 root 20 0 0 0 0 S 0.0 0.0 0:03.17 ksoftirqd/1 10 root RT 0 0 0 0 S 0.0 0.0 0:00.20 watchdog/1 11 root 20 0 0 0 0 S 0.0 0.0 0:07.23 events/0 12 root 20 0 0 0 0 S 0.0 0.0 0:08.55 events/1 13 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events/0 14 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events/1 15 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events_long/0 16 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events_long/1 17 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events_power_ef 18 root 20 0 0 0 0 S 0.0 0.0 0:00.00 events_power_ef 19 root 20 0 0 0 0 S 0.0 0.0 0:00.00 cgroup 20 root 20 0 0 0 0 S 0.0 0.0 0:00.00 khelper 21 root 20 0 0 0 0 S 0.0 0.0 0:00.01 netns 22 root 20 0 0 0 0 S 0.0 0.0 0:00.00 async/mgr 23 root 20 0 0 0 0 S 0.0 0.0 0:00.00 pm 24 root 20 0 0 0 0 S 0.0 0.0 0:00.29 sync_supers ------------ This is a company production mail server, and I can't find the solution, I need help, as soon as someone is able, thank you!

5 7

nodejs version 14
by Jerry Geis 22 Apr '20

22 Apr '20

Hi All, I was following the instructions for installing nodejs version 14. https://github.com/nodesource/distributions First thing was: curl -sL https://rpm.nodesource.com/setup_14.x | bash - After that : yum -y install nodejs ---> Package nodejs.x86_64 2:12.16.2-1nodesource will be installed --> Finished Dependency Resolution You can see its installing the OLD Version 12. not the 14. ??? Why ? (this errors actually) My repo looks correct for Version 14 not 12.. more /etc/yum.repos.d/nodesource-el7.repo [nodesource] name=Node.js Packages for Enterprise Linux 7 - $basearch baseurl=https://rpm.nodesource.com/pub_14.x/el/7/$basearch failovermethod=priority enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/NODESOURCE-GPG-SIGNING-KEY-EL [nodesource-source] name=Node.js for Enterprise Linux 7 - $basearch - Source baseurl=https://rpm.nodesource.com/pub_14.x/el/7/SRPMS failovermethod=priority enabled=0 gpgkey=file:///etc/pki/rpm-gpg/NODESOURCE-GPG-SIGNING-KEY-EL gpgcheck=1 Thoughts ? did I do something wrong ? Jerry

2 1

CentOOS 8 and libuv
by Adrian van Bloois 20 Apr '20

20 Apr '20

Hi all, Why is libuv-devel missing in CentOS-8? The rpm for libuv is preset but libuv-devel is not there. Adrian -- Adri P. van Bloois "Elegance is not a dispensable luxury but a factor that decides between success and failure." Edsger W. Dijkstra

3 2

running app panel overflows
by Michael Hennebry 19 Apr '20

19 Apr '20

I'm running Centos 7 with gnome. After 32 running applications, the panel at the bottom overflows. There seems to be no scrolling mechanism. How if at all can I see the overflow? -- Michael hennebry(a)web.cs.ndsu.NoDak.edu "Sorry but your password must contain an uppercase letter, a number, a haiku, a gang sign, a heiroglyph, and the blood of a virgin." -- someeecards

2 1

Re: [CentOS] [Off topic] sending mail from Comcast was: Sendmail not working
by Jason Pyeron 19 Apr '20

19 Apr '20

> -----Original Message----- > From: Tim Evans > Sent: Sunday, April 19, 2020 12:50 PM > > On 4/19/20 12:38 PM, S.Bob wrote: > > > > On 4/19/20 10:36 AM, Tim Evans wrote: > >> On 4/19/20 12:28 PM, S.Bob wrote: > >>> All; > >>> > >>> > >>> I installed sendmail via yum, but if I test it like this: > >>> > >>> > >> > >>> The original message was received at Sun, 19 Apr 2020 10:02:56 -0600 > >>> from localhost [127.0.0.1] > >>> > >>> ----- The following addresses had permanent fatal errors ----- > >>> <sbob(a)quadratum-braccas.com> > >>> (reason: 554 5.7.1 Service unavailable; Client host > >>> [50.243.150.81] blocked using xbl.spamhaus.org.rbl.local; > >>> https://www.spamhaus > >>> .org/query/ip/50.243.150.81) > >> > >> Is 50.243.150.81 your system's IP address? If so, as this shows, that > >> IP is on spamhaus' blacklist of addresses. Thus, your sendmail is > >> working fine. Problem is elsewhere. > >> > >> anything I can do to fix it? > > Assuming this is your IP address, visit https://www.spamhaus.org/lookup/ > and request that it be removed from the blacklisted IP's. > > However, looking at the headers from your message, it appears Comcast > may be your ISP, and this 50.243.150.81 IP address appears to be a > Comcast address, so you may need to contact Comcast tech support for > help in getting the blacklist designation removed. There are a few situations here. 1. You are a business customer with a static IP, and are entitled to send/receive SMTP by your ISP (Comcast) 2. You are a business/residential customer who is allowed to send (not likely allowed to receive) SMTP and you have a domain elsewhere to receive replies to your email 3. You are a business/residential customer who is NOT allowed to send SMTP except for your ISP (Comcast) provided email. Only you would know which on for sure is you, but it is very likely #3. The advice provided previously is for case #1 - contact Comcast and inform them that your contracted services are not working because of .... and you will need to beable to work with them on testing and suggesting fixes. They have a dedicated support phone number (which they provided you if you are actually a #1 type customer - e.g. gigabit pro, metro Ethernet, etc.) In case you are a #2 or #3 type customer, you may want to use a smart host configuration - e.g. define('SMART_HOST','[smtp.comcast.net]') . For postfix, use relayhost = [smtp.comcast.net] . Now when you send mail to that relay it will relay it. This is provided you are entitled to have your email relayed - contact Xfinity customer service for help there. If using this relay does not work, please post the exchange starting with the HELO (check your maillog or do it by hand with telnet). -- Jason Pyeron | Architect PD Inc | 10 w 24th St | Baltimore, MD | .com: jpyeron(a)pdinc.us tel : 202-741-9397

5 15

Sendmail not working
by S.Bob 19 Apr '20

19 Apr '20

All; I installed sendmail via yum, but if I test it like this: echo "Subject: sendmail test" | sendmail sbob(a)quadratum-braccas.com I get a local mail on the server with this every time: Message 1: From MAILER-DAEMON(a)kdb-bugs.example.com Sun Apr 19 10:15:00 2020 Return-Path: <MAILER-DAEMON(a)kdb-bugs.example.com> Date: Sun, 19 Apr 2020 10:15:00 -0600 From: Mail Delivery Subsystem <MAILER-DAEMON(a)kdb-bugs.example.com> To: <root(a)kdb-bugs.example.com> Content-Type: multipart/report; report-type=delivery-status; boundary="03JGF0ni013558.1587312900/kdb-bugs.example.com" Subject: Returned mail: see transcript for details Auto-Submitted: auto-generated (failure) Status: R Part 1: The original message was received at Sun, 19 Apr 2020 10:02:56 -0600 from localhost [127.0.0.1] ----- The following addresses had permanent fatal errors ----- <sbob(a)quadratum-braccas.com> (reason: 554 5.7.1 Service unavailable; Client host [50.243.150.81] blocked using xbl.spamhaus.org.rbl.local; https://www.spamhaus .org/query/ip/50.243.150.81) ----- Transcript of session follows ----- ... while talking to in1-smtp.messagingengine.com.: >>> RCPT To:<sbob(a)quadratum-braccas.com> <<< 554 5.7.1 Service unavailable; Client host [50.243.150.81] blocked using xbl.spamhaus.org.rbl.local; https://www.spamhaus.org/quer y/ip/50.243.150.81 554 5.0.0 Service unavailable >>> DATA <<< 421 4.4.2 mx5.messagingengine.com Error: timeout exceeded ... while talking to in2-smtp.messagingengine.com.: >>> DATA <<< 421 4.4.2 wmx2.messagingengine.com Error: timeout exceeded Thanks in advance If it helps, here is my sendmail.mc file: [root@kdb-bugs ~]# cat /etc/mail/sendmail.mc divert(-1)dnl dnl # dnl # This is the sendmail macro config file for m4. If you make changes to dnl # /etc/mail/sendmail.mc, you will need to regenerate the dnl # /etc/mail/sendmail.cf file by confirming that the sendmail-cf package is dnl # installed and then performing a dnl # dnl # /etc/mail/make dnl # include(`/usr/share/sendmail-cf/m4/cf.m4')dnl VERSIONID(`setup for linux')dnl OSTYPE(`linux')dnl dnl # dnl # Do not advertize sendmail version. dnl # dnl define(`confSMTP_LOGIN_MSG', `$j Sendmail; $b')dnl dnl # dnl # default logging level is 9, you might want to set it higher to dnl # debug the configuration dnl # dnl define(`confLOG_LEVEL', `9')dnl dnl # dnl # Uncomment and edit the following line if your outgoing mail needs to dnl # be sent out through an external mail server: dnl # dnl define(`SMART_HOST', `smtp.your.provider')dnl dnl # define(`confDEF_USER_ID', ``8:12'')dnl dnl define(`confAUTO_REBUILD')dnl define(`confTO_CONNECT', `1m')dnl define(`confTRY_NULL_MX_LIST', `True')dnl define(`confDONT_PROBE_INTERFACES', `True')dnl define(`PROCMAIL_MAILER_PATH', `/usr/bin/procmail')dnl define(`ALIAS_FILE', `/etc/aliases')dnl define(`STATUS_FILE', `/var/log/mail/statistics')dnl define(`UUCP_MAILER_MAX', `2000000')dnl define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl define(`confAUTH_OPTIONS', `A')dnl dnl # dnl # The following allows relaying if the user authenticates, and disallows dnl # plaintext authentication (PLAIN/LOGIN) on non-TLS links dnl # dnl define(`confAUTH_OPTIONS', `A p')dnl dnl # dnl # PLAIN is the preferred plaintext authentication method and used by dnl # Mozilla Mail and Evolution, though Outlook Express and other MUAs do dnl # use LOGIN. Other mechanisms should be used if the connection is not dnl # guaranteed secure. dnl # Please remember that saslauthd needs to be running for AUTH. dnl # dnl TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl dnl define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl dnl # dnl # Rudimentary information on creating certificates for sendmail TLS: dnl # cd /etc/pki/tls/certs; make sendmail.pem dnl # Complete usage: dnl # make -C /etc/pki/tls/certs usage dnl # dnl define(`confCACERT_PATH', `/etc/pki/tls/certs')dnl dnl define(`confCACERT', `/etc/pki/tls/certs/ca-bundle.crt')dnl dnl define(`confSERVER_CERT', `/etc/pki/tls/certs/sendmail.pem')dnl dnl define(`confSERVER_KEY', `/etc/pki/tls/certs/sendmail.pem')dnl dnl # dnl # This allows sendmail to use a keyfile that is shared with OpenLDAP's dnl # slapd, which requires the file to be readble by group ldap dnl # dnl define(`confDONT_BLAME_SENDMAIL', `groupreadablekeyfile')dnl dnl # dnl define(`confTO_QUEUEWARN', `4h')dnl dnl define(`confTO_QUEUERETURN', `5d')dnl dnl define(`confQUEUE_LA', `12')dnl dnl define(`confREFUSE_LA', `18')dnl define(`confTO_IDENT', `0')dnl dnl # If you're operating in a DSCP/RFC-4594 environment with QoS dnl define(`confINET_QOS', `AF11')dnl dnl FEATURE(delay_checks)dnl FEATURE(`no_default_msa', `dnl')dnl FEATURE(`smrsh', `/usr/sbin/smrsh')dnl FEATURE(`mailertable', `hash -o /etc/mail/mailertable.db')dnl FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable.db')dnl FEATURE(redirect)dnl FEATURE(always_add_domain)dnl FEATURE(use_cw_file)dnl FEATURE(use_ct_file)dnl dnl # dnl # The following limits the number of processes sendmail can fork to accept dnl # incoming messages or process its message queues to 20.) sendmail refuses dnl # to accept connections once it has reached its quota of child processes. dnl # dnl define(`confMAX_DAEMON_CHILDREN', `20')dnl dnl # dnl # Limits the number of new connections per second. This caps the overhead dnl # incurred due to forking new sendmail processes. May be useful against dnl # DoS attacks or barrages of spam. (As mentioned below, a per-IP address dnl # limit would be useful but is not available as an option at this writing.) dnl # dnl define(`confCONNECTION_RATE_THROTTLE', `3')dnl dnl # dnl # The -t option will retry delivery if e.g. the user runs over his quota. dnl # FEATURE(local_procmail, `', `procmail -t -Y -a $h -d $u')dnl FEATURE(`access_db', `hash -T<TMPF> -o /etc/mail/access.db')dnl FEATURE(`blacklist_recipients')dnl EXPOSED_USER(`root')dnl dnl # dnl # For using Cyrus-IMAPd as POP3/IMAP server through LMTP delivery uncomment dnl # the following 2 definitions and activate below in the MAILER section the dnl # cyrusv2 mailer. dnl # dnl define(`confLOCAL_MAILER', `cyrusv2')dnl dnl define(`CYRUSV2_MAILER_ARGS', `FILE /var/lib/imap/socket/lmtp')dnl dnl # dnl # The following causes sendmail to only listen on the IPv4 loopback address dnl # 127.0.0.1 and not on any other network devices. Remove the loopback dnl # address restriction to accept email from the internet or intranet. dnl # DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl dnl # dnl # The following causes sendmail to additionally listen to port 587 for dnl # mail from MUAs that authenticate. Roaming users who can't reach their dnl # preferred sendmail daemon due to port 25 being blocked or redirected find dnl # this useful. dnl # dnl DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl dnl # dnl # The following causes sendmail to additionally listen to port 465, but dnl # starting immediately in TLS mode upon connecting. Port 25 or 587 followed dnl # by STARTTLS is preferred, but roaming clients using Outlook Express can't dnl # do STARTTLS on ports other than 25. Mozilla Mail can ONLY use STARTTLS dnl # and doesn't support the deprecated smtps; Evolution <1.1.1 uses smtps dnl # when SSL is enabled-- STARTTLS support is available in version 1.1.1. dnl # dnl # For this to work your OpenSSL certificates must be configured. dnl # dnl DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl dnl # dnl # The following causes sendmail to additionally listen on the IPv6 loopback dnl # device. Remove the loopback address restriction listen to the network. dnl # dnl DAEMON_OPTIONS(`port=smtp,Addr=::1, Name=MTA-v6, Family=inet6')dnl dnl # dnl # enable both ipv6 and ipv4 in sendmail: dnl # dnl DAEMON_OPTIONS(`Name=MTA-v4, Family=inet, Name=MTA-v6, Family=inet6') dnl # dnl # We strongly recommend not accepting unresolvable domains if you want to dnl # protect yourself from spam. However, the laptop and users on computers dnl # that do not have 24x7 DNS do need this. dnl # FEATURE(`accept_unresolvable_domains')dnl dnl # dnl FEATURE(`relay_based_on_MX')dnl dnl # dnl # Also accept email sent to "localhost.localdomain" as local email. dnl # LOCAL_DOMAIN(`localhost.localdomain')dnl dnl # dnl # The following example makes mail from this host and any additional dnl # specified domains appear to be sent from mydomain.com dnl # dnl MASQUERADE_AS(`mydomain.com')dnl dnl # dnl # masquerade not just the headers, but the envelope as well dnl # dnl FEATURE(masquerade_envelope)dnl dnl # dnl # masquerade not just @mydomainalias.com, but @*.mydomainalias.com as well dnl # dnl FEATURE(masquerade_entire_domain)dnl dnl # dnl MASQUERADE_DOMAIN(localhost)dnl dnl MASQUERADE_DOMAIN(localhost.localdomain)dnl dnl MASQUERADE_DOMAIN(mydomainalias.com)dnl dnl MASQUERADE_DOMAIN(mydomain.lan)dnl MAILER(smtp)dnl MAILER(procmail)dnl dnl MAILER(cyrusv2)dnl -- `When you say "I wrote a program that crashed Windows", people just stare at you blankly and say "Hey, I got those with the system, *for free*".' (By Linus Torvalds)

5 7

Netfilter fails to filter traffic from a netblock?
by Jeffrey Walton 19 Apr '20

19 Apr '20

Hi Everyone, We rent a CentOS 7 VM from GoDaddy. We received a warning about excessive cpu usage, and a threat to cancel our service. We tracked it down to Apache and someone hammering our web server. The offending host is 59.64.129.175. To err on the side of caution we attempted to block the entire netblock. According to whois data, that's 59.64.128.0-59.64.159.255. iptables -A INPUT -s 59.64.128.0/19 -p TCP -j DROP After reboot cpu usage is still high and access_log still shows useless requests from the host: 59.64.129.175 - - [19/Apr/2020:08:53:53 -0400] "GET /w/index.php?title=Special:WhatLinksHere&limit=50& printable=yes HTTP/1.1" 301 311 I seem to be missing something. That's not surprising since I am not a server administrator. How do I filter the unwanted traffic from the netblock? Thanks in advance.

6 11

CentO 8 and nftables default policy
by Alessandro Baggi 19 Apr '20

19 Apr '20

Hi list, I'm studying nftables. I'm using CentOS 8.1 (Gnome) and I disabled firewalld. I noticed that a default policy is created with tables and chains probably for firewalld. So I created a .nft script where I stored my rules with a flush for previous ruleset, then saved on /etc/sysconfig/nftables.conf and the enabled nftables service. Running the script with nft -f script.nft all work as expected but when rebooting, running nft list ruleset I find my rules and the default policy (chains and tables) that I would not have in my configuration. My nftables.conf contains only my ruleset. For example, running nft list tables I found several default tables like: table ip filter table ip6 filter table bridge filter table ip nat table ip mangle So probably there is something that is applying its policy but I ignore what is. Can someone point me in the right direction? Thank you in advance.

2 3

Strangeness on X11 screen capture
by Jerry Geis 19 Apr '20

19 Apr '20

Hi all, I am running CentOS 7 on a NUC5CPYB. Intel video: 00:02.0 VGA compatible controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Integrated Graphics Controller (rev 35) When I take a screen shot I get "different" things. I use: export DISPLAY=:0.0 /usr/bin/xwd -silent -root -out screen; convert screen screen.png I tried import also for the screen capture and its the same random images. Granted the images are all things I have showing previously - but most times its not what is showing now. I have verified the Intel driver is loaded: [ 19.009] (II) LoadModule: "intel" [ 19.010] (II) Loading /usr/lib64/xorg/modules/drivers/intel_drv.so [ 19.012] (II) Module intel: vendor="X.Org Foundation" [ 19.012] compiled for 1.20.1, module version = 2.99.917 [ 19.012] Module class: X.Org Video Driver [ 19.012] ABI class: X.Org Video Driver, version 24.0 [ 19.012] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets: i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G, 915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM, Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33, GM45, 4 Series, G45/G43, Q45/Q43, G41, B43 [ 19.015] (II) intel: Driver for Intel(R) HD Graphics [ 19.015] (II) intel: Driver for Intel(R) Iris(TM) Graphics [ 19.015] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics [ 19.015] (++) using VT number 1 [ 19.016] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20181204 [ 19.018] (--) intel(0): Integrated Graphics Chipset: Intel(R) HD Graphics [ 19.019] (--) intel(0): CPU: x86-64, sse2, sse3, ssse3, sse4.1, sse4.2; using a maximum of 2 threads [ 19.019] (II) intel(0): Creating default Display subsection in Screen section "Default Screen Section" for depth/fbbpp 24/32 [ 19.019] (==) intel(0): Depth 24, (--) framebuffer bpp 32 [ 19.019] (==) intel(0): RGB weight 888 [ 19.019] (==) intel(0): Default visual is TrueColor [ 19.023] (II) intel(0): Output DP1 has no monitor section [ 19.024] (II) intel(0): Enabled output DP1 [ 19.024] (II) intel(0): Output HDMI1 has no monitor section [ 19.025] (II) intel(0): Enabled output HDMI1 [ 19.025] (II) intel(0): Output DP2 has no monitor section [ 19.026] (II) intel(0): Enabled output DP2 [ 19.026] (II) intel(0): Output HDMI2 has no monitor section [ 19.027] (II) intel(0): Enabled output HDMI2 [ 19.027] (--) intel(0): Using a maximum size of 256x256 for hardware cursors [ 19.027] (II) intel(0): Output VIRTUAL1 has no monitor section [ 19.027] (II) intel(0): Enabled output VIRTUAL1 [ 19.028] (--) intel(0): Output HDMI2 using initial mode 1920x1080 on pipe 2 What can be doing this ? How do I track it down? Thanks, Jerry

2 2

CentOS 8 and xhost
by Jerry Geis 18 Apr '20

18 Apr '20

I am trying to run 'xhost +' on CentOS 8 (such that I can grab a screen shot) but its not letting me. On boot of X I run the "xhost +" then later with SSH into hte box - I run export DISPLAY=:0.0 gnome-screenshot -f jj.png and I get the cannot open display message. This works on the older CentOS 7. What is the magic for C8? Thanks, Jerry

3 4

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