-----Original Message----- From: centos-bounces@centos.org [mailto:centos-bounces@centos.org] On Behalf Of Jason Pyeron Sent: Thursday, December 17, 2009 14:37 To: 'CentOS mailing list' Subject: [CentOS] NIS failover
We just updated our configuratiosn to have multiple NIS servers, when we initiated a test of client failover, we were disapointed.
It seemed that the only way to get a filaover was to /etc/init.d/ypbind restart.
It behaves as indicated in http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=508
4845 using
ypbind-1.17.2-13 on Centos 4.5 / Linux xxxxxxxxxxxx 2.6.9-55.0.12.ELsmp #1 SMP Fri Nov 2 12:38:56 EDT 2007 x86_64 x86_64 x86_64 GNU/Linux
http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=4858192
Any advice?
So, avoiding the security flamewars...
It seems that it behaves slightly different than I indicated before.
Snippet of the strace for # ypcat passwd ... mprotect(0x2a9566a000, 4096, PROT_READ) = 0 arch_prctl(ARCH_SET_FS, 0x2a959bde00) = 0 munmap(0x2a9556c000, 33321) = 0 brk(0) = 0x503000 brk(0x524000) = 0x524000 open("/usr/lib/locale/locale-archive", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=48528816, ...}) = 0 mmap(NULL, 48528816, PROT_READ, MAP_PRIVATE, 3, 0) = 0x2a959bf000 close(3) = 0 uname({sys="Linux", node="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", ...}) = 0 open("/var/yp/nicknames", O_RDONLY) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=185, ...}) = 0 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2a98807000 read(3, "passwd\t\tpasswd.byname\ngroup\t\tgro"..., 4096) = 185 read(3, "", 4096) = 0 close(3) = 0 munmap(0x2a98807000, 4096) = 0 open("/var/yp/binding/XXXXXXXXXXXXXXXXXXX.2", O_RDONLY) = 3 pread(3, "\1\0\0\0\300\250\1"\2\315\0\0", 12, 2) = 12 socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) = 4 getpid() = 13062 bind(4, {sa_family=AF_INET, sin_port=htons(942), sin_addr=inet_addr("0.0.0.0")}, 16) = 0 ioctl(4, FIONBIO, [1]) = 0 setsockopt(4, SOL_IP, IP_RECVERR, [1], 4) = 0 fcntl(4, F_SETFD, FD_CLOEXEC) = 0 close(3) = 0 close(4) = 0 socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 3 bind(3, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("0.0.0.0")}, 16) = 0 connect(3, {sa_family=AF_INET, sin_port=htons(111), sin_addr=inet_addr("192.168.1.34")}, 16) = -1 ETIMEDOUT (Connection timed out) close(3) = 0 socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) = 3 bind(3, {sa_family=AF_INET, sin_port=htons(943), sin_addr=inet_addr("0.0.0.0")}, 16) = 0 connect(3, {sa_family=AF_INET, sin_port=htons(111), sin_addr=inet_addr("192.168.1.34")}, 16 <unfinished ...>
Then when I ^C it and run again it has failed over, but otherwise it hangs there for more than 300 seconds.
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