sherpaurgen's questions

Im running ubuntu 20.04 on dell r740xd, One of the disk controller seem to present the disk(multipath disks used for openzfs pool) slow while the server is booting. If the server is boot from 'recovery mode'->'resume normal boot' the slow controller disk are detected and imported normally. until now i have tried to add rootdelay=300 option in grub cmdline options by editing file /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="rootdelay=300"
update-grub
update-initramfs -u

However i do not observe any delay and boot gets stuck

If the controller slot is disabled from the bios the server boots normally without using recovery mode(but its not an option).

Im trying to add rootdelay=60 option in grub cmdline options by editing file /etc/default/grub as

GRUB_CMDLINE_LINUX_DEFAULT="rootdelay=300" and also ran update-grub update-initramfs -u however i do not observe any delay after reboot and the root filesystem mounts right away

i can see that the rootdelay=300 is present in cat /proc/cmdline ,is there any thing missing here ?

im using ubuntu 16.04 on esxi-6, the proc/cmdline shows crashkernel is loaded at boottime

BOOT_IMAGE=/boot/vmlinuz-4.15.0-54-generic root=UUID=b12d12f2-cfd9-465d-9b10b12d12f2 ro net.ifnames=0 biosdevname=0 text crashkernel=384M-:128M

there are no memory related errors on dmesg or syslog regarding crashkernel memory allocation ...

  /#kdump-config show
    DUMP_MODE: kdump
    USE_KDUMP: 1
    KDUMP_SYSCTL:  kernel.panic_on_oops=1
    KDUMP_COREDIR: /var/crash
    crashkernel addr: 0x29000000
    /var/lib/kdump/vmlinuz: symbolic link to /boot/vmlinuz-4.15.0-54-generic
    kdump initrd: 
    /var/lib/kdump/initrd.img: symbolic link to /var/lib/kdump/initrd.img-4.15.0-54-generic
    current state: ready to kdump
    kexec command:
    /sbin/kexec -p --command-line="BOOT_IMAGE=/boot/vmlinuz-4.15.0-54-generic root=UUID=b12d12f2-cfd9-465d-9b10-b12d12f2 ro net.ifnames=0 biosdevname=0 text nr_cpus=1 systemd.unit=kdump-tools.service irqpoll nousb ata_piix.prefer_ms_hyperv=0" --initrd=/var/lib/kdump/initrd.img /var/lib/kdump/vmlinuz

i have tried the kdump path to simple ext4 partitoin eg. /dev/sdc1 , nfs share and lvm partition but when the sysrq is triggered the server is frozen where i have to reset/force reboot the server to be back online. the crash storage directory has only one file kexec_cmd with content of kexec command in kdump-config show output.I see that there are some modules that needs to be blacklisted in MS-HyperV is there similar modules that needs to be removed on esxi ?

Thanks

I'm getting close failed error when copying files to nfs share randomly. what could be possible reason ? rsync version 3.1.1

rsync: close failed on "/nfs_share/data/.99865579700_0.gz.LgfpIk": Input/output error (5) rsync error: error in file IO (code 11) at receiver.c(860) [receiver=3.1.1]

Ubuntu 16.04 x64bit kernel 4.4.0 cpu:8 , memory:31G , ZFS is main filesystem and cifs share is mounted

# sudo numactl --hardware
available: 1 nodes (0)
node 0 cpus: 0 1 2 3 4 5 6 7
node 0 size: 32157 MB
node 0 free: 2301 MB
node distances:
node   0 
  0:  10 

cat /proc/meminfo | grep -i huge
AnonHugePages:  13080576 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB

my server freezes randomly with log in syslog(full log see pastebin) i read this article which explains these kind of error and possible resolution here

Jan 15 02:35:01 centrallogserver CRON[55892]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)
Jan 15 02:36:49 centrallogserver kernel: [120146.673901] java: page allocation failure: order:4, mode:0x240c0c0
Jan 15 02:36:49 centrallogserver kernel: [120146.673908] CPU: 7 PID: 52372 Comm: java Tainted: P           O    4.4.0-112-generic #135-Ubuntu
Jan 15 02:36:49 centrallogserver kernel: [120146.673911] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 09/19/2018
Jan 15 02:36:49 centrallogserver kernel: [120146.673915]  0000000000000286 d4f0e41d54eb99fa ffff88038a7cb968 ffffffff813fc233
Jan 15 02:36:49 centrallogserver kernel: [120146.673920]  000000000240c0c0 0000000000000000 ffff88038a7cb9f8 ffffffff8119696a
Jan 15 02:36:49 centrallogserver kernel: [120146.673924]  d4f0e41d00000004 0000000000000004 0000000000000040 ffff880284f12a00
Jan 15 02:36:49 centrallogserver kernel: [120146.673929] Call Trace:
Jan 15 02:36:49 centrallogserver kernel: [120146.673938]  [<ffffffff813fc233>] dump_stack+0x63/0x90
Jan 15 02:36:49 centrallogserver kernel: [120146.673945]  [<ffffffff8119696a>] warn_alloc_failed+0xfa/0x150
Jan 15 02:36:49 centrallogserver kernel: [120146.673952]  [<ffffffff8119a14f>] ? __alloc_pages_direct_compact+0x10f/0x130
Jan 15 02:36:49 centrallogserver kernel: [120146.673959]  [<ffffffff8119a5fd>] __alloc_pages_slowpath.constprop.88+0x48d/0xb00
Jan 15 02:36:49 centrallogserver kernel: [120146.673966]  [<ffffffff8119aef6>] __alloc_pages_nodemask+0x286/0x2a0
Jan 15 02:36:49 centrallogserver kernel: [120146.673975]  [<ffffffff811e483c>] alloc_pages_current+0x8c/0x110
Jan 15 02:36:49 centrallogserver kernel: [120146.673980]  [<ffffffff81198ac9>] alloc_kmem_pages+0x19/0x90
Jan 15 02:36:49 centrallogserver kernel: [120146.673986]  [<ffffffff811b63ce>] kmalloc_order_trace+0x2e/0xe0
Jan 15 02:36:49 centrallogserver kernel: [120146.673993]  [<ffffffff811f10ce>] __kmalloc+0x22e/0x250
Jan 15 02:36:49 centrallogserver kernel: [120146.674053]  [<ffffffffc08e5c51>] smb2_unlock_range+0xa1/0x340 [cifs]
Jan 15 02:36:49 centrallogserver kernel: [120146.674094]  [<ffffffffc08daef1>] ? smb2_add_credits+0xb1/0x250 [cifs]
Jan 15 02:36:49 centrallogserver kernel: [120146.674137]  [<ffffffffc08bd600>] cifs_lock+0xc00/0x12a0 [cifs]
Jan 15 02:36:49 centrallogserver kernel: [120146.674142]  [<ffffffff811f048b>] ? __slab_free+0xcb/0x2c0
Jan 15 02:36:49 centrallogserver kernel: [120146.674147]  [<ffffffff811f048b>] ? __slab_free+0xcb/0x2c0
Jan 15 02:36:49 centrallogserver kernel: [120146.674154]  [<ffffffff8139677e>] ? common_file_perm+0x6e/0x1a0
Jan 15 02:36:49 centrallogserver kernel: [120146.674160]  [<ffffffff81266c6e>] vfs_lock_file+0x1e/0x40
Jan 15 02:36:49 centrallogserver kernel: [120146.674164]  [<ffffffff81266f6b>] do_lock_file_wait+0x5b/0x100
Jan 15 02:36:49 centrallogserver kernel: [120146.674170]  [<ffffffff811efc8a>] ? kmem_cache_alloc+0x1ca/0x1f0
Jan 15 02:36:49 centrallogserver kernel: [120146.674174]  [<ffffffff812651bb>] ? locks_alloc_lock+0x1b/0x70
Jan 15 02:36:49 centrallogserver kernel: [120146.674179]  [<ffffffff81268763>] fcntl_setlk+0x133/0x2c0
Jan 15 02:36:49 centrallogserver kernel: [120146.674186]  [<ffffffff812244c2>] SyS_fcntl+0x3e2/0x5e0
Jan 15 02:36:49 centrallogserver kernel: [120146.674193]  [<ffffffff818457ad>] entry_SYSCALL_64_fastpath+0x2b/0xe7
Jan 15 02:36:49 centrallogserver kernel: [120146.674197] Mem-Info:
Jan 15 02:36:49 centrallogserver kernel: [120146.674207] active_anon:3871678 inactive_anon:544913 isolated_anon:0
Jan 15 02:36:49 centrallogserver kernel: [120146.674207]  active_file:181867 inactive_file:199383 isolated_file:0
Jan 15 02:36:49 centrallogserver kernel: [120146.674207]  unevictable:5021 dirty:138 writeback:0 unstable:0
Jan 15 02:36:49 centrallogserver kernel: [120146.674207]  slab_reclaimable:232459 slab_unreclaimable:1851907
Jan 15 02:36:49 centrallogserver kernel: [120146.674207]  mapped:260688 shmem:6003 pagetables:26155 bounce:0
Jan 15 02:36:49 centrallogserver kernel: [120146.674207]  free:179404 free_pcp:283 free_cma:0
Jan 15 02:36:49 centrallogserver kernel: [120146.674217] Node 0 DMA free:15840kB min:60kB low:72kB high:88kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15988kB managed:15904kB mlocked:0kB dirty:0kB writeback:0kB mapped:0kB shmem:0kB slab_reclaimable:0kB slab_unreclaimable:32kB kernel_stack:0kB pagetables:0kB unstable:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? yes
Jan 15 02:36:49 centrallogserver kernel: [120146.674230] lowmem_reserve[]: 0 2976 32142 32142 32142
Jan 15 02:36:49 centrallogserver kernel: [120146.674236] Node 0 DMA32 free:164924kB min:12132kB low:15164kB high:18196kB active_anon:465040kB inactive_anon:473384kB active_file:15584kB inactive_file:57088kB unevictable:1204kB isolated(anon):0kB isolated(file):0kB present:3129152kB managed:3048416kB mlocked:1204kB dirty:44kB writeback:0kB mapped:45748kB shmem:2908kB slab_reclaimable:146872kB slab_unreclaimable:1350916kB kernel_stack:6624kB pagetables:9124kB unstable:0kB bounce:0kB free_pcp:704kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Jan 15 02:36:49 centrallogserver kernel: [120146.674249] lowmem_reserve[]: 0 0 29165 29165 29165
Jan 15 02:36:49 centrallogserver kernel: [120146.674255] Node 0 Normal free:536852kB min:118872kB low:148588kB high:178308kB active_anon:15021672kB inactive_anon:1706268kB active_file:711884kB inactive_file:740444kB unevictable:18880kB isolated(anon):0kB isolated(file):0kB present:30408704kB managed:29865212kB mlocked:18880kB dirty:508kB writeback:0kB mapped:997004kB shmem:21104kB slab_reclaimable:782964kB slab_unreclaimable:6056680kB kernel_stack:65472kB pagetables:95496kB unstable:0kB bounce:0kB free_pcp:428kB local_pcp:0kB free_cma:0kB writeback_tmp:0kB pages_scanned:0 all_unreclaimable? no
Jan 15 02:36:49 centrallogserver kernel: [120146.674267] lowmem_reserve[]: 0 0 0 0 0
Jan 15 02:36:49 centrallogserver kernel: [120146.674273] Node 0 DMA: 0*4kB 0*8kB 0*16kB 1*32kB (U) 1*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15840kB
Jan 15 02:36:49 centrallogserver kernel: [120146.674291] Node 0 DMA32: 504*4kB (UME) 2593*8kB (UME) 2117*16kB (UE) 3322*32kB (UH) 1*64kB (H) 2*128kB (H) 2*256kB (H) 2*512kB (H) 0*1024kB 0*2048kB 0*4096kB = 164792kB
Jan 15 02:36:49 centrallogserver kernel: [120146.674310] Node 0 Normal: 17501*4kB (UEH) 30839*8kB (UMH) 12373*16kB (UMH) 689*32kB (U) 0*64kB 1*128kB (H) 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 536860kB
Jan 15 02:36:49 centrallogserver kernel: [120146.674329] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Jan 15 02:36:49 centrallogserver kernel: [120146.674333] Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB
Jan 15 02:36:49 centrallogserver kernel: [120146.674335] 408507 total pagecache pages
Jan 15 02:36:49 centrallogserver kernel: [120146.674338] 19222 pages in swap cache
Jan 15 02:36:49 centrallogserver kernel: [120146.674341] Swap cache stats: add 382634, delete 363412, find 121020/166633
Jan 15 02:36:49 centrallogserver kernel: [120146.674344] Free swap  = 3438328kB
Jan 15 02:36:49 centrallogserver kernel: [120146.674346] Total swap = 4194300kB
Jan 15 02:36:49 centrallogserver kernel: [120146.674348] 8388461 pages RAM
Jan 15 02:36:49 centrallogserver kernel: [120146.674351] 0 pages HighMem/MovableOnly
Jan 15 02:36:49 centrallogserver kernel: [120146.674353] 156078 pages reserved
Jan 15 02:36:49 centrallogserver kernel: [120146.674355] 0 pages cma reserved
Jan 15 02:36:49 centrallogserver kernel: [120146.674357] 0 pages hwpoisoned
Jan 15 02:36:49 centrallogserver kernel: [120146.674577] java: page allocation failure: order:4, mode:0x240c0c0
Jan 15 02:36:49 centrallogserver kernel: [120146.674581] CPU: 7 PID: 52372 Comm: java Tainted: P           O    4.4.0-112-generic #135-Ubuntu
Jan 15 02:36:49 centrallogserver kernel: [120146.674585] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 09/19/2018

As possible workaround i have increased the min free bytes from 60MB to 256MB and vfs_cache_pressure=50 Similarly i decreased the zfs_arc_max and zfs_dirty_data_max to 8GB and 128MB respectively but still the problem persists. Please suggest what system tuning could be done to prevent freezing issue one possible way i see is disabling overcommiting so no memory is allocated larger than physical ram

Im using lenevo M5 server which have Gbps ethernet cards, but strangely when i read cat /sys/class/net/eth3/speed it show 100 similarly when using ethtool it show 100Mbps only.The output of dmesg and ethtool are below. Any idea why is that

root@server1:~# dmesg |grep eth1
[ 3.027487] tg3 0000:16:00.1 eth1: Tigon3 [partno(BCM95769) rev 5719001] (PCI Express) MAC address 08:94:ef:5d:81:a2
[ 3.027497] tg3 0000:16:00.1 eth1: attached PHY is 5719C (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[1])
[ 3.027503] tg3 0000:16:00.1 eth1: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] TSOcap[1]
[ 3.027508] tg3 0000:16:00.1 eth1: dma_rwctrl[00000001] dma_mask[64-bit]
[ 28.133071] bond0: Adding slave eth1
[ 28.249876] bond0: Enslaving eth1 as a backup interface with an up link
[ 53.149602] tg3 0000:16:00.1 eth1: Link is up at 100 Mbps, full duplex
[ 53.149620] tg3 0000:16:00.1 eth1: Flow control is off for TX and off for RX
[ 53.149624] tg3 0000:16:00.1 eth1: EEE is disabled

# ethtool eth3

Settings for eth3: 
Supported ports: [ TP ] 
Supported link modes: 10baseT/Half 10baseT/Full 
100baseT/Half 100baseT/Full 
1000baseT/Half 1000baseT/Full 
Supported pause frame use: No 
Supports auto-negotiation: Yes 
Advertised link modes: 100baseT/Full 
Advertised pause frame use: Symmetric 
Advertised auto-negotiation: Yes 
Link partner advertised link modes: 100baseT/Half 100baseT/Full 
1000baseT/Full 
Link partner advertised pause frame use: No 
Link partner advertised auto-negotiation: Yes 
Speed: 100Mb/s 
Duplex: Full 
Port: Twisted Pair 
PHYAD: 2 
Transceiver: internal 
Auto-negotiation: on 
MDI-X: off 
Supports Wake-on: g 
Wake-on: g 
Current message level: 0x000000ff (255) 
drv probe link timer ifdown ifup rx_err tx_err 
Link detected: yes 

When i try to change the speed with ethtool -s eth3 speed 1000 duplex full the "Speed " section is "Unknown" similarly reading(cat) the file /sys/class/net/eth3/speed gives invalid argument.

I have dnsmasq installed on server and it is heavily used.I have following dnsmasq log in the /var/log/syslog when given the signal "SIGUSR1"

Jul 16 13:45:50 server1 dnsmasq[427008]: time 1531748750
Jul 16 13:45:50 server1 dnsmasq[427008]: cache size 10000, 18355/597070 cache insertions re-used unexpired cache entries.
Jul 16 13:45:50 server1 dnsmasq[427008]: queries forwarded 1510313, queries answered locally 15347110
Jul 16 13:45:50 server1 dnsmasq[427008]: queries for authoritative zones 0
Jul 16 13:45:50 server1 dnsmasq[427008]: server 100.1.2.3#53: queries sent 242802, retried or failed 0
Jul 16 13:45:50 server1 dnsmasq[427008]: server 100.2.3.4#53: queries sent 1371704, retried or failed 0

I have set cache size to 10000 which is max allowed value. The application which uses dnsmasq for request also feels slow. How to understand the dnsmasq log and know if these logs represent performance issue due to low cache size ?

Why am I getting "not a proper statistics file" when reading sar log files?

sysstat Version: 11.2.0-1ubuntu0.2

root@sandbox1:/var/log/sysstat# ls -lh

total 4.5K

-rw-r--r-- 1 root root 4.9K Jul 12 06:17 sa12

root@sandbox1:/var/log/sysstat# sar -u -f sa12

Not a proper statistics file

I have multipath configured in ubuntu 14 server but strangely the number of path available for each device is different where the 5TB disk have 4 path and 4TB have 3 path. I have reloaded the multipath service and run rescan-scsi-bus but the output is same but havent rebooted server yet

# multipath -ll
3611112ac0000000000000002018 dm-9 zdata,VV              
size=5.0T features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=130 status=active
  |- 4:0:3:52 sdaa 65:160 active ready running
  |- 4:0:4:52 sdad 65:208 active ready running
  |- 6:0:3:52 sdag 66:0   active ready running
  `- 6:0:4:52 sdaj 66:48  active ready running

378192dab0000000000000002018 dm-6 zdata,VV              
size=4.0T features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='round-robin 0' prio=130 status=active
  |- 4:0:4:50 sdh  8:112  active ready running
  |- 6:0:3:50 sdn  8:208  active ready running
  `- 6:0:4:50 sdt  65:48  active ready running

# ls -l /dev/mapper/
total 0
lrwxrwxrwx 1 root root    7 maj  6 11:37 378192dab0000000000000002018 -> ../dm-1
brw-rw---- 1 root disk 252,2 maj  9 14:07 3611112ac0000000000000002018
brw-rw---- 1 root disk 252,   3 maj  9 14:07 
crw------- 1 root root  10, 236 maj  6 11:35 control
lrwxrwxrwx 1 root root        7 maj  9 14:07 serv1--vg-data -> ../dm-0
lrwxrwxrwx 1 root root        7 jun 13 14:19 serv1--vg-backup1 -> ../dm-8
lrwxrwxrwx 1 root root        8 jun 13 14:32 serv1--vg-web -> ../dm-12

Any idea where to look now ?

I have a pool named test_pool and i can only see it when "zfs import" is run. How can i delete this pool and detach associated device from it ?

   # zpool import
       pool: test_pool
         id: 13538020891587345121
      state: FAULTED
     status: One or more devices contains corrupted data.
     action: The pool cannot be imported due to damaged devices or data.
        The pool may be active on another system, but can be imported using
        the '-f' flag.
       see: http://zfsonlinux.org/msg/ZFS-8000-5E
     config:

        data_pool    FAULTED  corrupted data
          raidz1-1   ONLINE
            sdf      UNAVAIL  corrupted data
            sdg      UNAVAIL  corrupted data
            sdh      UNAVAIL  corrupted data

I have tried # zpool import test_pool -f to import and get it destroyed but get below message

cannot import 'data_pool': one or more devices is currently unavailable

How do i completely disable ubuntu 16.04 lts motd banner that displays package update and dist upgrade available information for. eg.

475 packages can be updated.
0 updates are security updates. 

I have moved these 3 files 90-updates-available, 91-release-upgrade, 98-reboot-requiredand those messages stopped showing up , i want to make sure if this is correct way

my ubuntu 16.04 server occassionaly reboots itself and i dont have a clue why? below is the syslog file content which have keyword named Shutdown

Nov 21 13:51:42 AB-active-server systemd[1]: Created slice User Slice of support.
Nov 21 13:51:42 AB-active-server systemd[1]: Starting User Manager for UID 1000...
Nov 21 13:51:42 AB-active-server systemd[1]: Started Session 1196 of user support.
Nov 21 13:51:42 AB-active-server systemd[18340]: Reached target Sockets.
Nov 21 13:51:42 AB-active-server systemd[18340]: Reached target Paths.
Nov 21 13:51:42 AB-active-server systemd[18340]: Reached target Timers.
Nov 21 13:51:42 AB-active-server systemd[18340]: Reached target Basic System.
Nov 21 13:51:42 AB-active-server systemd[18340]: Reached target Default.
Nov 21 13:51:42 AB-active-server systemd[18340]: Startup finished in 15ms.
Nov 21 13:51:42 AB-active-server systemd[1]: Started User Manager for UID 1000.
Nov 21 13:51:42 AB-active-server console-kit-daemon[21735]: (process:18348): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
Nov 21 13:51:42 AB-active-server console-kit-daemon[21735]: missing action
Nov 21 13:51:44 AB-active-server systemd[1]: Stopping User Manager for UID 1000...
Nov 21 13:51:44 AB-active-server systemd[18340]: Stopped target Default.
Nov 21 13:51:44 AB-active-server systemd[18340]: Reached target Shutdown.
Nov 21 13:51:44 AB-active-server console-kit-daemon[21735]: (process:18386): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
Nov 21 13:51:44 AB-active-server console-kit-daemon[21735]: missing action
Nov 21 13:51:44 AB-active-server console-kit-daemon[21735]: console-kit-daemon[21735]: GLib-CRITICAL: Source ID 739 was not found when attempting to remove it
Nov 21 13:51:44 AB-active-server systemd[18340]: Starting Exit the Session...
Nov 21 13:51:44 AB-active-server console-kit-daemon[21735]: GLib-CRITICAL: Source ID 739 was not found when attempting to remove it
Nov 21 13:51:44 AB-active-server systemd[18340]: Stopped target Basic System.
Nov 21 13:51:44 AB-active-server systemd[18340]: Stopped target Timers.
Nov 21 13:51:44 AB-active-server systemd[18340]: Stopped target Sockets.
Nov 21 13:51:44 AB-active-server systemd[18340]: Stopped target Paths.
Nov 21 13:51:44 AB-active-server systemd[18340]: Received SIGRTMIN+24 from PID 18387 (kill).
Nov 21 13:51:44 AB-active-server systemd[1]: Stopped User Manager for UID 1000.
Nov 21 13:51:44 AB-active-server systemd[1]: Removed slice User Slice of support.

the server's disk partitions have 60%+ storage free and inodes are used 1% only

Memory is 60G and intel Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz

For postfix I can change the binded ip by changing parameter like

smtp_bind_address = 192.168.146.197 in main.cf

How to change the ip address binded by zimbra(server have multi ip's) ?

I'm using office365 mail for my domain Eg. "apples.com". The IP address is blacklisted, i think only the Microsoft support can de-list it from RBL's. Also after looking at the email header it looks like the emails sent are routed through different servers(IP Addresses) internally by office365 and finally delivered to external recipient mailbox.i think it is also same with google apps

Is it possible to monitor blacklists for office365 mail servers ip addresses or the microsoft company will monitor themselves and delist after getting blacklisted after some time ?

I have about 15 emails in deferred queue destined to [email protected] .Below is mailq sample

-Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
0531B51E5501*    1354 Mon May  8 19:15:18  [email protected]
                                         [email protected]

EB01051E83E4*    1333 Tue May  9 22:50:29  [email protected]
                                         [email protected]
...
...
...

i tried to edit /etc/postfix/virtual but it forwards only for new emails and doesnt work in existing emails in deferred queue

Im testing Route53 for failover between two servers on same zone for a domain xyz.com with TTL 60 seconds only. I have also setup the healthchecks for primary server only to monitor the URL http://<primaryIP>:80. The primary and secondary servers both have nginx running with security group open for port 80. when i stop the nginx on primary server the A record is switched to the backup server's IP when i used dig to find A record but I cannot browse the domain xyz.com or ping xyz.com

Im trying to install mongodbserver on ubuntu 14.04LTS with reference to mongodb docs but getting the dpkg related errors

root@c3:~# apt-get install -y mongodb-org
Reading package lists... Done
Building dependency tree       
Reading state information... Done
mongodb-org is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up mongodb-org-server (3.0.12) ...
start: Job failed to start
invoke-rc.d: initscript mongod, action "start" failed.
dpkg: error processing package mongodb-org-server (--configure):
 subprocess installed post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of mongodb-org:
 mongodb-org depends on mongodb-org-server; however:
  Package mongodb-org-server is not configured yet.

dpkg: error processing package mongodb-org (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 mongodb-org-server
 mongodb-org
E: Sub-process /usr/bin/dpkg returned an error code (1)

i did below steps so far:

apt-get purge mongodb-org*
apt-get clean
rm -rf /var/lib/apt/lists/*
apt-get update

Im using zimbra zcs 8.0.0 GA on ubuntu 12.04LTS , is it possible to migrate the settings/mailboxes from old zimbra to "new zimbra server". The new server have ubuntu 14.04.4 x64bit installed with Intel Xeon CPU X3430 @2.40GHz and 15G of ram. I would appreciate any helpful suggestions or links. Thank you

I have bind9 dns server with resursion enabled only for internetwork. It is working normally but for one particular site it fails to provide the answer

"ipay.com.np"

When i do

dig @mydns.server.com ipay.com.np +trace 

it can fetch the answer. But normal dns query without other options does work

dig @mydns.server.com ipay.com.np 

; <<>> DiG 9.9.5-3ubuntu0.8-Ubuntu <<>> @202.94.66.2 ipay.com.np
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached

Update:- now the records for domain ipay.com.np is fetched by my caching dns automagically. I havent done any thing but restarted bind server yesterday and now it works

I have icinga 2.3.11 on ubuntu 14.04.3 inside VirtualBox. Im trying to monitor "https" port 443 for example "https://mail.google.com" here.Below is my snippet from default host.conf file

object Host "mailserver-01" {
    import "generic-host"
    address = "74.125.136.17"    /* ip for mail.google.com */ 
    vars.os = "Linux"
    vars.http_vhosts["http"] = {
        http_uri = "/"
    }
    vars.http_ssl = "1"
    vars.http_warn_time = "5"
    vars.http_critical_time = "10"

    vars.notification["mail"] = {
        groups = [ "icingaadmins" ]
    }
}

Below is snippet from default services.conf file

apply Service "httpS" {
    import "generic-service"
    check_command = "http"
    assign where host.name == "mailserver-01"
}

Although the icingaweb2 dashboard shows OK/green, Im not sure if it is correct way