VmMrtSrv06

VmMrtSrv06 is a xen domain built in Maretec xen server composed of a 20GB LV and a temporarily device made of a dvd iso.

Objective/Function

This domain is meant to become a dedicated OpenDAP/Thredds/LAS and ftp server.

Architecture

Logs/notes

Creation

From the maretec user at the MrtXnSrv, 192.168.20.125:

Create a new LV and a new domain

> sudo lvcreate -n vmmrtsrv06 -L 20G dados01
> cd /home/maretec/xen_configs
/home/maretec/xen_configs> sudo /usr/sbin/xm new -F vmmrtsrv06-1.0.cfg
> sudo /usr/sbin/xm start vmmrtsrv06
> sudo /usr/sbin/xm sched-credit -d VMMMRTSRV06 -w 256 -c 150
> sudo /usr/sbin/xm sched-credit
sched-credit> Name                                ID Weight  Cap
Domain-0                             0    256    0
VMMRTSRV02                          17    256    0
VMMRTSRV03                                256    0
VMMRTSRV04                          19    256    0
VMMRTSRV05                          33    256    0
VMMRTSRV06                          36    256  150

let's add a data LV as a new PV in the domain

> sudo /sbin/lvcreate -n vmmrtsrv06-data -L 50G dados01
> sudo /usr/sbin/xm block-attach VMMRTSRV06 phy:/dev/mapper/dados01-vmmrtsrv06--data hdb:disk w
> sudo /usr/sbin/xm reboot VMMRTSRV06

Accessing the domain via a console with VNC

Access the domain with a VNC client, such as <goto>TightVNC</goto>. The domain console access port with VNC is 192.168.20.125:5903. If running from the live cd, then proceed to install the distro. If the distro is already installed and you're not running from the live cd, then the linux distro is already installed and you can check the network ip so you can ssh. Open a new terminal and type the > ifconfig command. Read the ip number. In this case we have 192.168.20.136. Then you can proceed to configure your new domain.

Configuration

From the user user at the VmMrtSrv06, 192.168.20.136:

Update your distro

> sudo yum update

Enable sshd

> su
> vim /etc/ssh/sshd_config
sshd_config> #PermitRootLogin yes
sshd_config> PermitRootLogin no
> service sshd start
> service sshd status
> chkconfig --level 345 sshd on
> chkconfig | grep sshd

and httpd

> service httpd start
> service httpd status
> chkconfig --level 345 httpd on
> chkconfig | grep httpd

Add a new PV, a new VG and new LVs

> pvcreate /dev/sdb
> pvscan
> vgcreate -p 4 -v data /dev/sdb
> vgscan
> lvcreate -n opendap -L 40G data
> lvcreate -n ftp -L 5G data
> lvcreate -n http -L 1G data

Create filesystems and mount them

> mkfs -t ext2 /dev/data/opendap
> mkfs -t ext2 /dev/data/ftp
> mkfs -t ext2 /dev/data/http
> mkdir /opendap
> mkdir /http
> mkdir /ftp
> vim /etc/fstab
fstab> /dev/data/opendap       /opendap                ext2    defaults        0 0
fstab> /dev/data/http          /http                   ext2    defaults        0 0
fstab> /dev/data/ftp           /ftp                    ext2    defaults        0 0
> mount -a
> df

Configure the firewall

> vim /etc/sysconfig/iptables
iptables> -A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT
iptables> -A INPUT -m state --state NEW -m tcp -p tcp --dport 8080 -j ACCEPT
> /etc/init.d/iptables restart
> netstat -tulpn

From the X environment, open up the System-->Administration-->Firewall. Then open up the ports 22(ssh), 21(ftp), 80(http), 443(https) and 8080(tomcat).

Maintenance

None done yet...

Changing the bridging between the LAN and the DMZ

To be done...

Troubleshooting

• The mouse in VNC won't work!
• > sudo yum update on the client maching, then reboot.