两个服务器可以通过NFS共享相同的ocfs2 FS吗？

Question

问题是:我有两个服务器将FS挂载为ocfs2：

root [server01]% mount | grep ocfs2
ocfs2_dlmfs on /dlm type ocfs2_dlmfs (rw)
/dev/sddlmam1 on /share type ocfs2 (rw,_netdev,datavolume,heartbeat=local)

和

root [server02]% mount | grep ocfs2
ocfs2_dlmfs on /dlm type ocfs2_dlmfs (rw)
/dev/sddlmam1 on /share type ocfs2 (rw,_netdev,datavolume,heartbeat=local)

两者都通过NFS协议共享这个FS：

root [server01]% cat /etc/exports 
/share *(rw,sync,no_root_squash)

和

root [server02]% cat /etc/exports 
/share *(rw,sync,no_root_squash)

OCFS2的配置看起来很好：

root [server01]% cat  /etc/ocfs2/cluster.conf
cluster:
    node_count = 2
    name = ocfs2

node:
    number = 0
    cluster = ocfs2
    ip_port = 7778
    ip_address = 10.1.1.2
    name = server01

node:
    number = 1
    cluster = ocfs2
    ip_port = 7778
    ip_address = 10.1.1.3
    name = server02


root [server02]% cat  /etc/ocfs2/cluster.conf 

cluster:
    node_count = 2
    name = ocfs2

node:
    number = 0
    cluster = ocfs2
    ip_port = 7778
    ip_address = 10.1.1.2
    name = server01

node:
    number = 1
    cluster = ocfs2
    ip_port = 7778
    ip_address = 10.1.1.3
    name = server02

这些服务器是集群和平衡的：

root [client01]% nslookup servercluster
Server:     10.108.1.1
Address:    10.108.1.1#53

servercluster.domain.com    canonical name = servercluster.domain.com.
Name:   servercluster.domain.com
Address: 10.1.1.2
Name:   servercluster.domain.com
Address: 10.1.1.3
Name:   servercluster.domain.com
Address: 10.1.1.4

root [client01]% mount | grep servercluster
servercluster:/share on /share type nfs4 (rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=10.1.1.5,local_lock=none,addr=10.1.1.2)

和

root [client02]% nslookup servercluster
Server:     10.108.1.1
Address:    10.108.1.1#53

servercluster.domain.com    canonical name = servercluster.domain.com.
Name:   servercluster.domain.com
Address: 10.1.1.2
Name:   servercluster.domain.com
Address: 10.1.1.3
Name:   servercluster.domain.com
Address: 10.1.1.4

root [client02]% mount | grep servercluster
servercluster:/share on /share type nfs4 (rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=10.1.1.6,local_lock=none,addr=10.1.1.3)

server01遇到了一些故障，并报告了NFS错误：

dracut.log

Info: Not stripping '/tmp/initramfs.6SdU0W/lib/modules/3.8.13-118.16.4.el6uek.x86_64/kernel/fs/nfsd/nfsd.ko', because module signature appended.

电文：

Dec  8 02:18:19 server01 kernel: NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
Dec  8 02:18:19 server01 kernel: NFSD: starting 90-second grace period (net ffffffff81983940)

我的问题是:这些错误是否可能是由两个不同的服务器通过NFS共享相同的FS而产生的？

Answer 1

底层的OCFS2文件系统不应该有任何损坏，因为它处理锁定本身。

显然，两个NFS服务器之间没有任何协调，因此您可能会遇到这样的情况:一个客户端向现有文件发送更新，而另一个客户端同时执行相同的操作--通常第二个客户端的数据将立即覆盖第一个客户端的更新，可能会出现延迟，因为文件将在第一个客户端写入时暂时打开--但至少您不应该看到任何实际的损坏。