salut
exista o masina cu centos pe care ruleaza niste vps-uri.
aleator si destul de frecvent masinile virtuale mor.
sunt cateva care au comportamentul asta (mereu aceleasi), si cateva care
nu fac probleme.
singura diferenta dintre ele pare a fi incarcarea, unele fiind foarte
frecate (mail server), cele care nu decedeaza nu prea fac nimic.
de asemenea, comportamentul apare doar in timpul zilei.
una singura decedeaza noaptea si isi revine de la sine dupa ~2 ore.
decedeaza la modul la care anumite servicii nu mai merg, la top toate
procesele arata asa:
top - 12:59:36 up 7 days, 14:27, 1 user, load average: 0.06, 0.02, 0.00
Tasks: 109 total, 1 running, 108 sleeping, 0 stopped, 0 zombie
Cpu0 : 0.6%us, 0.1%sy, 0.0%ni, 98.4%id, 0.6%wa, 0.0%hi, 0.0%si,
0.2%st
Cpu1 : 0.3%us, 0.1%sy, 0.0%ni, 99.5%id, 0.1%wa, 0.0%hi, 0.0%si,
0.0%st
Mem: 531112k total, 467932k used, 63180k free, 33524k buffers
Swap: 1044184k total, 115856k used, 928328k free, 118356k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 25 0 2128 536 512 S 9999 0.1 0:00.40 init
2 root RT 0 0 0 0 S 9999 0.0 0:01.18 migration/0
3 root 34 19 0 0 0 S 9999 0.0 0:00.00 ksoftirqd/0
4 root RT 0 0 0 0 S 9999 0.0 0:00.00 watchdog/0
and so on toate (%CPU 9999)
ma pot da cu ssh pe el, dar nu pot reporni nici un serviciu, nici
reboot, nici poweroff
singura solutie e xm destroy, xm create.
masina gazda este un centos 5.4
- 2.6.18-194.11.1.el5xen #1 SMP Tue Aug 10 19:41:55 EDT 2010 x86_64
x86_64 x86_64 GNU/Linux
- xen-3.4.2-2.el5
- 2x Intel(R) Xeon(TM) CPU 3.00GHz
- Mem: 8387628k total
s-a facut la un mom dat si upgrade de kernel si xen nu s-a remediat nimic.
masinile sunt:
Fedora release 8
2.6.21-2950.fc8xen #1 SMP Tue Oct 23 12:24:34 EDT 2007 i686 i686 i386
GNU/Linux
512 ram
majoritatea au in dmesg in acel moment mesaje de flood pe 110 (dovecot)
cu sending cookies
s-a incercat
acpi=off la bootare
syncookies disabled
nf conntrack marit
fs.file-max marit
valori diverse, insa nici o imbunatatire.
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