genext2fs: too big filesystem

Эмбэддэд линуксыг хөрвүүлж, NFS дээр байрлах үндсэн файлын системийг үүсгэх үед

genext2fs: too big filesystem

алдаа өгөх тохиолдол гардаг.

Looking up port of RPC 100003/2 on "ip_addr"

Хэрэв эмбэддэд линукс цөм ачааллаад, үндсэн файлын системийг NFS-р дамжуулан суурилуулж чадахгүй дараахь симптомыг үзүүлээд байвал

Looking up port of RPC 100003/2 on "ip_addr"
Looking up port of RPC 100005/1 on "ip_addr"

name server, firewall-н тохиргоог дараахь файлуудад шалгаарай:

- /etc/resolv.conf (name server)
- /etc/sysconfig/iptables (firewall)

Name server-н хувьд:

nameserver "ip_addr"

firewall-н хувьд:

-A INPUT -m state --state NEW -m tcp -p tcp --dport 111 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 2049 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 4000:4003 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 111 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 2049 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 4000:4003 -j ACCEPT

гэсэн тохиргоо байх ёстой.

Temporary failure in name resolution

When Fedora (10) yum returns "[Errno 4] IOError: Trying other mirror." and prevent to install any rpm package, configure /etc/resolv.conf by specifying nameserver IP address, such as

nameserver 192.168.0.1

Kernel panic: No init found. Try passing init= option to kernel.

Линукс-н цөмийг ачааллах үед гардаг энэ алдааг хэрхэн засах талаар.

1. rootpath is empty in IP-Config during kernel boot. -> Configured DHCP with

option root-path "192.168.0.98:/opt/rootfs.incaip2";

to the file /etc/dhcpd.conf. Did not helped.

2. Embed initrd to kernel. Solved.

Kernel panic: No init found. Try passing init= option to kernel.

Линукс-н цөмийг ачааллах үед гардаг энэ алдааг хэрхэн засах талаар

Setting up the Network File System (NFS) on Fedora 9

Here's a quick post on how to build and setup NFS server on Fedora 9. (Fedora 9 болон түүнээс дээшхи хувилбарын үйлдлийн систем дээр хэрхэн Network File System суулгаж, холбогдох тохируулгыг хийх тухай товч заавар. Зөвхөн өгөгдсөн командуудыг дууриагаад хийхэд хангалттай гэж найдаж байна)

NFS server installation and configuration

Do following as root.

1. Download and install NFS rmp by using yum:

yum -y install nfs-utils rpcbind

2. Configure the server by specifing the shared directories, the IP address(es) of the hosts that have access to the shared directories and their rights (read-only, read+write etc) in the /etc/exports file. For example, /opt/rootfs.incaip2 is NFS share and a host with the IP address 192.168.0.97 can access to this share:

/opt/rootfs.incaip2 *(rw,async,no_root_squash)

or

/opt/rootfs.incaip2 192.168.0.0/24(rw,async,no_root_squash)

or

/opt/rootfs.incaip2 192.168.0.97(rw,async,no_root_squash)

To make this change in effect, invoke:

exportfs -rv

3. Copy files to your NFS share. For example, copy unpacked root file system, /tmp//build/root_filesystem, to the /opt/rootfs.incaip2 directory.
4. In order to prevent hosts from other networks from connecting any of the NFS-related daemons, edit /etc/hosts.deny file as follows:

lockd:ALL
mountd:ALL
rpcbind:ALL
rquotad:ALL
statd:ALL

5. In order to allow only the host with IP address of 192.168.0.97 to connect, add following lines to the /etc/hosts.allow file:

lockd:127.0.0.1,192.168.0.97
mountd:127.0.0.1,192.168.0.97
rpcbind:127.0.0.1,192.168.0.97
rquotad:127.0.0.1,192.168.0.97
statd:127.0.0.1,192.168.0.97

6. Specify fixed IP ports in use of NFS by adding following lines to the /etc/sysconfig/nfs file:

STATD_PORT=4000
LOCKD_TCPPORT=4001
LOCKD_UDPPORT=4001
MOUNTD_PORT=4002
RQUOTAD_PORT=4003

These are suggested ports to be used in NFS-related daemons.

Firewall configuration

7. Configure firewall to allow above selected TCP and UDP ports. To do so edit the /etc/sysconfig/iptables file, so that it contains following settings:

-A INPUT -m state --state NEW -m tcp -p tcp --dport 111 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 2049 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 4000:4003 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 111 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 2049 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 4000:4003 -j ACCEPT

Make sure that these lines must be before COMMIT, otherwise they have no effect.
8. Once the changes are made to the firewall, restart it:

service iptables restart

Starting and verifying NFS services

9. With all of the changes made, the NFS daemons can be started up:

service rpcbind restart
service nfs restart
service nfslock restart

10. To make sure that everything is working properly, the RPC information can be checked by invoking:

rpcinfo -p

The similar information should be displayed as below:

program vers proto port service
100000 4 tcp 111 portmapper
100000 3 tcp 111 portmapper
100000 2 tcp 111 portmapper
100000 4 udp 111 portmapper
100000 3 udp 111 portmapper
100000 2 udp 111 portmapper
100024 1 udp 4000 status
100024 1 tcp 4000 status
100011 1 udp 4003 rquotad
100011 2 udp 4003 rquotad
100011 1 tcp 4003 rquotad
100011 2 tcp 4003 rquotad
100003 2 udp 2049 nfs
100003 3 udp 2049 nfs
100003 4 udp 2049 nfs
100021 1 udp 4001 nlockmgr
100021 3 udp 4001 nlockmgr
100021 4 udp 4001 nlockmgr
100021 1 tcp 4001 nlockmgr
100021 3 tcp 4001 nlockmgr
100021 4 tcp 4001 nlockmgr
100003 2 tcp 2049 nfs
100003 3 tcp 2049 nfs
100003 4 tcp 2049 nfs
100005 1 udp 4002 mountd
100005 1 tcp 4002 mountd
100005 2 udp 4002 mountd
100005 2 tcp 4002 mountd
100005 3 udp 4002 mountd
100005 3 tcp 4002 mountd

11. Verify that the selected directories are exported:

showmount -e

12. In order to verify that the selected TCP and UDP ports are being listened, invoke:

netstat -tauap

13. If everything is OK, make NFS services startable at boot time with following commands:

chkconfig portmap off
chkconfig nfs off
chkconfig nfslock off
chkconfig --level 345 portmap on
chkconfig --level 345 nfs on
chkconfig --level 345 nfslock on

Sources:
1. Setting up a Fedora NFS server
2. Fedora9: Quick NFS Server Howto setup NFS server fedora
3. F9 Network File System (NFS)