Babar Zahoor: 2010

DRBD module version: 8.2.6 userland version: 8.3.2 preferably kernel and userland Version Problem

Steps to cop up with this problem.

[root@ha1 ~]# yum remove kmod-drbd82
Loaded plugins: fastestmirror
Setting up Remove Process
Resolving Dependencies
--> Running transaction check
---> Package kmod-drbd82.x86_64 0:8.2.6-2 set to be erased
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================================
Package                        Arch                      Version                    Repository                    Size
========================================================================================================================
Removing:
kmod-drbd82                    x86_64                    8.2.6-2                    installed                    2.8 M

Transaction Summary
========================================================================================================================
Install      0 Package(s)
Update       0 Package(s)
Remove       1 Package(s)

Is this ok [y/N]: y
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Erasing        : kmod-drbd82                                                                                      1/1

Removed:
kmod-drbd82.x86_64 0:8.2.6-2

Complete!
[root@ha1 ~]# yum install drbd83 kmod-drbd83
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* addons: mirror.eshk.hk
* base: mirror.eshk.hk
* centosplus: mirror.eshk.hk
* contrib: mirror.eshk.hk
* extras: mirror.eshk.hk
* updates: centosb2.centos.org
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package drbd83.x86_64 0:8.3.2-6.el5_3 set to be updated
---> Package kmod-drbd83.x86_64 0:8.3.2-6.el5_3 set to be installed
--> Finished Dependency Resolution

Dependencies Resolved

========================================================================================================================
Package                       Arch                     Version                          Repository                Size
========================================================================================================================
Installing:
drbd83                        x86_64                   8.3.2-6.el5_3                    extras                   210 k
kmod-drbd83                   x86_64                   8.3.2-6.el5_3                    extras                   122 k

Transaction Summary
========================================================================================================================
Install      2 Package(s)
Update       0 Package(s)
Remove       0 Package(s)

Total download size: 331 k
Is this ok [y/N]: y
Downloading Packages:
(1/2): kmod-drbd83-8.3.2-6.el5_3.x86_64.rpm                                                      | 122 kB     00:02
(2/2): drbd83-8.3.2-6.el5_3.x86_64.rpm                                                           | 210 kB     00:07
------------------------------------------------------------------------------------------------------------------------
Total                                                                                    30 kB/s | 331 kB     00:11
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
Installing     : drbd83                                                                                           1/2
Installing     : kmod-drbd83                                                                                      2/2

Installed:
drbd83.x86_64 0:8.3.2-6.el5_3                            kmod-drbd83.x86_64 0:8.3.2-6.el5_3

Complete!
[root@ha1 ~]#

Wriiten by Babar Zahoor

Dated:12-01-2010

Pupose: Configuration of DNS (Bind) server in chroot environment.

OS CentOS 5.4 X86_64

-------------------------------------
Please Install the bind packages
-------------------------------------

[root@ns1 ~]# yum install bind bind-utils bind-*
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* addons: virror.hanoilug.org
* extras: ftp.hostrino.com
* updates: ftp.hostrino.com
addons

| 951 B 00:00
extras

| 1.1 kB 00:00
ftp

| 2.1 kB 00:00
updates

| 1.9 kB 00:00
updates/primary_db

| 444 kB 00:00
Setting up Install Process
Package 30:bind-9.3.6-4.P1.el5_4.1.x86_64 already installed and latest version
Package 30:bind-utils-9.3.6-4.P1.el5_4.1.x86_64 already installed and latest version
Package 30:bind-sdb-9.3.6-4.P1.el5_4.1.x86_64 already installed and latest version
Package 30:bind-chroot-9.3.6-4.P1.el5_4.1.x86_64 already installed and latest version
Package 30:bind-devel-9.3.6-4.P1.el5_4.1.x86_64 already installed and latest version
Package 30:bind-devel-9.3.6-4.P1.el5_4.1.i386 already installed and latest version
Package 30:bind-libs-9.3.6-4.P1.el5_4.1.x86_64 already installed and latest version
Package 30:bind-libs-9.3.6-4.P1.el5_4.1.i386 already installed and latest version
Package 30:bind-9.3.6-4.P1.el5_4.1.x86_64 already installed and latest version
Package 30:bind-utils-9.3.6-4.P1.el5_4.1.x86_64 already installed and latest version
Package 30:bind-libbind-devel-9.3.6-4.P1.el5_4.1.x86_64 already installed and latest version
Package 30:bind-libbind-devel-9.3.6-4.P1.el5_4.1.i386 already installed and latest version
Nothing to do

----------------------------------------------
Please Configure Static IP and Default Gateway
----------------------------------------------

[root@ns1 ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=static
IPADDR=192.168.1.100
NETMASK=255.255.255.0
ONBOOT=yes
HWADDR=00:16:36:73:7e:4f

wq!

[root@ns1 ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:16:36:73:7E:4F
inet addr:192.168.1.100 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::216:36ff:fe73:7e4f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1641 errors:0 dropped:0 overruns:0 frame:0
TX packets:950 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:192907 (188.3 KiB) TX bytes:117111 (114.3 KiB)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:105 errors:0 dropped:0 overruns:0 frame:0
TX packets:105 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:10213 (9.9 KiB) TX bytes:10213 (9.9 KiB)

[root@ns1 ~]#
[root@ns1 ~]# vi /etc/sysconfig/network
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=dns.companydns.org
GATEWAY=192.168.1.1

wq!

--------------------------------------------------------------------------------------------------------------------
Now we are going to configure the named service please copy the files content and modify with your network settings
--------------------------------------------------------------------------------------------------------------------

[root@ns1 ~]#
[root@ns1 ~]# cd /var/named/chroot/
[root@ns1 chroot]# ll
total 24
drwxr-x--- 2 root named 4096 Dec 1 00:00 dev
drwxr-x--- 2 root named 4096 Jan 4 04:42 etc
dr-xr-xr-x 85 root root 0 Jan 11 22:41 proc
drwxr-x--- 6 root named 4096 Dec 1 00:00 var
[root@ns1 chroot]#

-------------------------------
Now create zone file named.conf
-------------------------------

[root@ns1 chroot]# vi etc/named.conf

options
{
directory "/var/named"; // the default
dump-file "data/cache_dump.db";
statistics-file "data/named_stats.txt";
memstatistics-file "data/named_mem_stats.txt";

};

zone "." IN {
type hint;
file "named.root";
};

zone "localhost" IN {
type master;
file "localhost.fwd";
allow-update { none; };
};

zone "0.0.127.in-addr.arpa" IN {
type master;
file "localhost.rev";
allow-update { none; };
};

zone "companydns.org" IN {
type master;
file "companydns.org.fwd";
allow-update { none; };
};

zone "1.168.192.in-addr.arpa" IN {
type master;
file "companydns.org.rev";
allow-update { none; };
};

wq!

[root@ns1 chroot]# cd var/named

[root@ns1 named]#

--------------------------
Now create named.root file
--------------------------

[root@ns1 named]#

First We confiure named.root file for root dns

[root@ns1 named]# vi named.root
. 6D IN NS A.ROOT-SERVERS.NET.
. 6D IN NS B.ROOT-SERVERS.NET.
. 6D IN NS C.ROOT-SERVERS.NET.
. 6D IN NS D.ROOT-SERVERS.NET.
. 6D IN NS E.ROOT-SERVERS.NET.
. 6D IN NS F.ROOT-SERVERS.NET.
. 6D IN NS G.ROOT-SERVERS.NET.
. 6D IN NS H.ROOT-SERVERS.NET.
. 6D IN NS I.ROOT-SERVERS.NET.
. 6D IN NS J.ROOT-SERVERS.NET.
. 6D IN NS K.ROOT-SERVERS.NET.
. 6D IN NS L.ROOT-SERVERS.NET.
. 6D IN NS M.ROOT-SERVERS.NET.
A.ROOT-SERVERS.NET. 6D IN A 198.41.0.4
B.ROOT-SERVERS.NET. 6D IN A 192.228.79.201
C.ROOT-SERVERS.NET. 6D IN A 192.33.4.12
D.ROOT-SERVERS.NET. 6D IN A 128.8.10.90
E.ROOT-SERVERS.NET. 6D IN A 192.203.230.10
F.ROOT-SERVERS.NET. 6D IN A 192.5.5.241
G.ROOT-SERVERS.NET. 6D IN A 192.112.36.4
H.ROOT-SERVERS.NET. 6D IN A 128.63.2.53
I.ROOT-SERVERS.NET. 6D IN A 192.36.148.17
J.ROOT-SERVERS.NET. 6D IN A 192.58.128.30
K.ROOT-SERVERS.NET. 6D IN A 193.0.14.129
L.ROOT-SERVERS.NET. 6D IN A 199.7.83.42
M.ROOT-SERVERS.NET. 6D IN A 202.12.27.33

wq!

----------------------------------------------------------------------------------------------------------------------------------
Now create zone db files one by one localhost.fwd and the localhost.rev are must then your network zone files forward and reverse
----------------------------------------------------------------------------------------------------------------------------------

[root@ns1 named]# vi localhost.fwd
$ORIGIN localhost.
$TTL 86400
@ IN SOA ns1.companydns.org. hostmaster.companydns.org. (
20100104 ; Serial number
3H ; Refresh 1 day
15M ; Retry 2 hours
1W ; Expire 41.67 days
1D ) ; Minimum TTL 2 days

@ IN NS dns.companydns.org.

localhost. IN A 127.0.0.1

wq! ##### Save the file after copying the content from here. #####

[root@ns1 named]# vi localhost.rev
$ORIGIN 0.0.127.in-addr.arpa.
$TTL 86400
@ IN SOA ns1.companydns.org. hostmaster.companydns.org. (
20100104 ; Serial number
3H ; Refresh 1 day
15M ; Retry 2 hours
1W ; Expire 41.67 days
1D ) ; Minimum TTL 2 days

@ IN NS ns1.companydns.org.

1.0.0.127.in-addr.arpa. IN PTR localhost.

wq!

[root@ns1 named]# vi companydns.org.fwd
$ORIGIN companydns.org.
$TTL 86400
@ IN SOA ns1.companydns.org. hostmaster.companydns.org. (
20100104 ; Serial number
3H ; Refresh 1 day
15M ; Retry 2 hours
1W ; Expire 41.67 days
1D ) ; Minimum TTL 2 days

@ IN NS ns1.companydns.org.

ns1.companydns.org. IN A 192.168.1.100
ftp.companydns.org. IN A 192.168.1.101
www.companydns.org. IN A 192.168.1.102
client3.companydns.org. IN A 192.168.1.103
client4.companydns.org. IN A 192.168.1.104

wq!

[root@ns1 named]# vi companydns.org.rev
$ORIGIN 1.168.192.in-addr.arpa.
$TTL 86400
@ IN SOA ns1.companydns.org. root.companydns.org. (
20100104 ; Serial number
3H ; Refresh 1 day
15M ; Retry 2 hours
1W ; Expire 41.67 days
1D ) ; Minimum TTL 2 days

@ IN NS ns1.companydns.org.

100.1.168.192.in-addr.arpa. IN PTR ns1.companydns.org.
101.1.168.192.in-addr.arpa. IN PTR ftp.companydns.org.
102.1.168.192.in-addr.arpa. IN PTR www.companydns.org.
103.1.168.192.in-addr.arpa. IN PTR client1.companydns.org.
104.1.168.192.in-addr.arpa. IN PTR clinet2.companydns.org.

wq!

[root@ns1 ~]# vi /etc/resolv.conf
search companydns.org
nameserver 192.168.1.100

wq!

-----------------------------------------------------------------
Configuration has been done now start "/etc/init.d/named" service
-----------------------------------------------------------------

[root@ns1 ~]# /etc/init.d/named start
Starting named: [ OK ]
[root@ns1 ~]# dig yahoo.com

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.1 <<>> yahoo.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46559
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 7, ADDITIONAL: 2

;; QUESTION SECTION:
;yahoo.com. IN A

;; ANSWER SECTION:
yahoo.com. 21600 IN A 209.191.93.53
yahoo.com. 21600 IN A 69.147.114.224
yahoo.com. 21600 IN A 209.131.36.159

;; AUTHORITY SECTION:
yahoo.com. 172800 IN NS ns1.yahoo.com.
yahoo.com. 172800 IN NS ns2.yahoo.com.
yahoo.com. 172800 IN NS ns3.yahoo.com.
yahoo.com. 172800 IN NS ns4.yahoo.com.
yahoo.com. 172800 IN NS ns5.yahoo.com.
yahoo.com. 172800 IN NS ns6.yahoo.com.
yahoo.com. 172800 IN NS ns8.yahoo.com.

;; ADDITIONAL SECTION:
ns6.yahoo.com. 172800 IN A 202.43.223.170
ns8.yahoo.com. 172800 IN A 202.165.104.22

;; Query time: 643 msec
;; SERVER: 192.168.1.100#53(192.168.1.100)
;; WHEN: Tue Jan 12 03:01:01 2010
;; MSG SIZE rcvd: 233

[root@ns1 ~]#

--------------------------------------------------
Now please open ports for named server for network
--------------------------------------------------

[root@ns1 ~]# iptables -A INPUT -p tcp -m multiport --dport 53,953 -j ACCEPT
[root@ns1 ~]# iptables -A INPUT -p udp -m multiport --dport 53,953 -j ACCEPT
[root@ns1 ~]#
[root@ns1 ~]# /etc/init.d/iptables save
Saving firewall rules to /etc/sysconfig/iptables: [ OK ]
[root@ns1 ~]#
[root@ns1 ~]# dig ns1.companydns.org

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.1 <<>> ns1.companydns.org
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29732
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;ns1.companydns.org. IN A

;; ANSWER SECTION:
ns1.companydns.org. 86400 IN A 192.168.1.100

;; AUTHORITY SECTION:
companydns.org. 86400 IN NS ns1.companydns.org.

;; Query time: 1 msec
;; SERVER: 192.168.1.100#53(192.168.1.100)
;; WHEN: Tue Jan 12 03:13:33 2010
;; MSG SIZE rcvd: 66

[root@ns1 ~]#
[root@ns1 ~]# dig www.companydns.org

; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.1 <<>> www.companydns.org
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10800
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1

;; QUESTION SECTION:
;www.companydns.org. IN A

;; ANSWER SECTION:
www.companydns.org. 86400 IN A 192.168.1.102

;; AUTHORITY SECTION:
companydns.org. 86400 IN NS ns1.companydns.org.

;; ADDITIONAL SECTION:
ns1.companydns.org. 86400 IN A 192.168.1.100

;; Query time: 1 msec
;; SERVER: 192.168.1.100#53(192.168.1.100)
;; WHEN: Tue Jan 12 03:14:09 2010
;; MSG SIZE rcvd: 86

[root@ns1 ~]#

ALLHAMDULILLAH We have configured proper bind server on CentOS 5.4

Note:Please install bind packages and then copy the files text from this configuration and paste to your server.
Also modify the settings as per your network machine names and their IP's.

Babar Zahoor

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