Difference between revisions of "Vnx-rootfsfedora"

Latest revision as of 00:07, 3 November 2016

How to create a KVM Fedora root filesystem for VNX

Follow this procedure to create a KVM Fedora based root filesystem for VNX. The procedure has been tested with Fedora 24, 20, 18, 16 and 14.

Basic installation

Create the filesystem disk image:

qemu-img create -f qcow2 vnx_rootfs_kvm_fedora.qcow2 20G

Get Fedora installation DVD (use the complete DVD; do not use the Live version, as it seems the installation wizard does not include the customization menu). For example:

wget ftp://ftp.rediris.es/mirror/fedora/16/Fedora/i386/iso/Fedora-16-i386-DVD.iso
cp Fedora-16-i386-DVD.iso /almacen/iso

Create the virtual machine with:

vnx --create-rootfs vnx_rootfs_kvm_fedora.qcow2 --install-media /almacen/iso/Fedora-16-i386-DVD.iso --mem 768M

Note: add "--arch x86_64" option for 64 bits virtual machines

Follow the Fedora installation assistant. At some point, you will have to choose among different system profiles: desktop, web server, minimal, etc.
Enable login on the first serial line:

Fedora 18, 20 and 24:

Edit /etc/default/grub and add:

GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyS0,115200n8  net.ifnames=0 biosdevname=0"
GRUB_TERMINAL="serial"
GRUB_SERIAL_COMMAND="serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1"

And afterwards execute:

grub2-mkconfig -o /boot/grub2/grub.cfg

Fedora 16. Execute this command:

ln -s /usr/lib/systemd/system/getty@.service   /etc/systemd/system/getty.target.wants/getty@ttyS0.service

Fedora 14. Create a file named /etc/init/serial-ttyS0.conf with the following content:

#This service maintains a getty on /dev/ttyS0.
start on stopped rc RUNLEVEL=[2345]
stop on starting runlevel [016]
respawn
exec /sbin/agetty /dev/ttyS0 9600 vt100-nav

And add ttyS0 to /etc/securetty file if you want to login root on that console:

echo "ttyS0" >> /etc/securetty

Finally, delete the net udev rules file and halt the system:

rm /etc/udev/rules.d/70-persistent-net.rules
halt -p

Configuration

Restart the system with the following command:

vnx --modify-rootfs vnx_rootfs_kvm_fedora.qcow2 --update-aced --mem 768M

Note: ignore the errors "timeout waiting for response on VM socket". 768M are needed if you are installing a root filesystem with desktop interface Note: add "--arch x86_64" option for 64 bits virtual machines

Access the system through the text console to easy the copy-paste of commands:

virsh console vnx_rootfs_kvm_fedora.qcow2

Check that you have network connectivity. Maybe you have to activate the network interface by hand:

dhclient eth0

Note: use "ip link show" to know which network interface to use.

Update the system and install additional packages

yum update
yum install perl perl-XML-LibXML perl-NetAddr-IP acpid udisks perl-Sys-Syslog xterm

Note: if yum fails, check that the network is working. Maybe you will have to manually execute "dhclient eth0", at least in the case of a minimal installation.

Install VNX autoconfiguration daemon:

mount /dev/sdb /mnt/
perl /mnt/vnxaced-lf/install_vnxaced

Disable Network Manager to avoid problems with autoconfiguration daemon

systemctl stop NetworkManager.service 
systemctl disable NetworkManager.service
systemctl enable network.service

If you have chosen a "minimum installation", activate network services (they are disabled by default):

chkconfig --level 3 network on

Optionally:

Install other services needed, for example, an apache server:

yum install httpd
chkconfig httpd off  # if you want to avoid automatic start of apache server

Or, if using a "minumum installation", install network utilities:

yum install telnet wget openssh-clients

If you want automatic login, just edit /etc/gdm/custom.conf and add the following lines:

AutomaticLoginEnable=true
AutomaticLogin=vnx

Disable the firewall. Firewall is enabled by default; that could be problematic for testing purpose systems. If desired, disable it graphically in "System|Administration|Firewall" option, or using the following command from the command line:

# Fedora 18
chkconfig firewalld off

# Fedora 16 & 14
chkconfig iptables off
chkconfig ip6tables off

Change grub timeout to 0 by editing /etc/default/grub file and setting:

GRUB_TIMEOUT=0

and executing:

grub2-mkconfig -o /boot/grub2/grub.cfg

Disable screensaver if using a GUI.

Create a file /etc/vnx_rootfs_version to store version number and informacion about modification. For example:

VER=v0.25
OS=Fedora 18
DESC=Basic Fedora 18 root-filesystem without GUI

Finally, stop the virtual machine with:

vnx_halt

vnx_halt

/etc/vnx_rootfs_version file

Installing additional software

To install additional software or to modify your root file system, you just have to:

Start a virtual machine from it:

vnx --modify-rootfs vnx_rootfs_kvm_fedora.qcow2

Check network connectivity. Maybe you have to activate the network interface by hand:

dhclient eth1

Note: use "ip link show" to know which network interface to use.

Do the modifications you want.
Finally, halt the system using:

vnx_halt

Updating VNXACED

You can automatically update the VNXACE daemon with the following command:

vnx --modify-rootfs vnx_rootfs_kvm_fedora.qcow2 --update-aced -y

If VNXACE daemon is not updated automatically, you can do it manually by accessing the virtual machine console and type:

mount /dev/sdb /mnt/
perl /mnt/vnxaced-lf/install_vnxaced

@@ Line 1: / Line 1: @@
-{{Title|How to create a Fedora root filesystem for VNX}}
+{{Title|How to create a KVM Fedora root filesystem for VNX}}
-(being updated...do not use...)
+Follow this procedure to create a KVM Fedora based root filesystem for VNX. The procedure has been tested with Fedora 24, 20, 18, 16 and 14.
-Follow this procedure to create a fedora based root filesystem for VNX. The procedure has been tested with Fedora 16 and 14.
 == Basic installation ==
 <ul>
 <li>Create the filesystem disk image:</li>
-  qemu-img create -f qcow2 vnx_rootfs_kvm_fedora.qcow2 8GB
+  qemu-img create -f qcow2 vnx_rootfs_kvm_fedora.qcow2 20G
 <li>Get Fedora installation DVD (use the complete DVD; do not use the Live version, as it seems the installation wizard does not include the customization menu). For example:</li>
   wget ftp://ftp.rediris.es/mirror/fedora/16/Fedora/i386/iso/Fedora-16-i386-DVD.iso
   cp Fedora-16-i386-DVD.iso /almacen/iso
 <li>Create the virtual machine with:</li>
-  vnx --create-rootfs vnx_rootfs_kvm_fedora.qcow2 --install-media /almacen/iso/Fedora-16-i686-Live-Desktop.iso --mem 768M
+  vnx --create-rootfs vnx_rootfs_kvm_fedora.qcow2 --install-media /almacen/iso/Fedora-16-i386-DVD.iso --mem 768M
+Note: add '''"--arch x86_64"''' option for 64 bits virtual machines
 <li>Follow the Fedora installation assistant. At some point, you will have to choose among different system profiles: desktop, web server, minimal, etc.</li>
 <li>Enable login on the first serial line:</li>
 <ul>
+<li>Fedora 18, 20 and 24:</li>
+<ul>
+<li>Edit /etc/default/grub and add:</li>
+<pre>
+GRUB_CMDLINE_LINUX_DEFAULT="console=tty0 console=ttyS0,115200n8  net.ifnames=0 biosdevname=0"
+GRUB_TERMINAL="serial"
+GRUB_SERIAL_COMMAND="serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1"
+</pre>
+<li>And afterwards execute:</li>
+ grub2-mkconfig -o /boot/grub2/grub.cfg
+</ul>
 <li>Fedora 16. Execute this command:</li>
   ln -s /usr/lib/systemd/system/getty@.service   /etc/systemd/system/getty.target.wants/getty@ttyS0.service
@@ Line 27: / Line 37: @@
 And add ttyS0 to /etc/securetty file if you want to login root on that console:
   echo "ttyS0" >> /etc/securetty
 </ul>
 <li>Finally, delete the net udev rules file and halt the system:</li>
@@ Line 39: / Line 48: @@
   vnx --modify-rootfs vnx_rootfs_kvm_fedora.qcow2 --update-aced --mem 768M
 Note: ignore the errors "timeout waiting for response on VM socket". 768M are needed if you are installing a root filesystem with desktop interface
+Note: add '''"--arch x86_64"''' option for 64 bits virtual machines
 <li>Access the system through the text console to easy the copy-paste of commands:</li>
   virsh console vnx_rootfs_kvm_fedora.qcow2
@@ Line 46: / Line 56: @@
 <li>Update the system and install additional packages</li>
   yum update
-  yum install perl perl-XML-DOM acpid udisks
+  yum install perl perl-XML-LibXML perl-NetAddr-IP acpid udisks perl-Sys-Syslog xterm
 Note: if yum fails, check that the network is working. Maybe you will have to manually execute "dhclient eth0", at least in the case of a minimal installation.
 <li>Install VNX autoconfiguration daemon:</li>
   mount /dev/sdb /mnt/
   perl /mnt/vnxaced-lf/install_vnxaced
+<li>Disable Network Manager to avoid problems with autoconfiguration daemon</li>
+ systemctl stop NetworkManager.service
+ systemctl disable NetworkManager.service
+ systemctl enable network.service
 <!--ul>
 <li>From the host execute:</li>
@@ Line 72: / Line 86: @@
   AutomaticLogin=vnx
 <li>Disable the firewall. Firewall is enabled by default; that could be problematic for testing purpose systems. If desired, disable it graphically in "System|Administration|Firewall" option, or using the following command from the command line:</li>
+ # Fedora 18
+ chkconfig firewalld off
+ # Fedora 16 & 14
   chkconfig iptables off
   chkconfig ip6tables off
+<li>Change grub timeout to 0 by editing /etc/default/grub file and setting:</li>
+ GRUB_TIMEOUT=0
+and executing:
+ grub2-mkconfig -o /boot/grub2/grub.cfg
+<li>Disable screensaver if using a GUI.</li>
 </ul>
 <li>Create a file /etc/vnx_rootfs_version to store version number and informacion about modification. For example:</li>
 <pre>
-VER=v0.24
+VER=v0.25
-OS=Fedora 16
+OS=Fedora 18
-DESC=Basic Fedora 16 root-filesystem without GUI
+DESC=Basic Fedora 18 root-filesystem without GUI
 </pre>
 <li>Finally, stop the virtual machine with:</li>
@@ Line 87: / Line 110: @@
 == Installing additional software ==
-To install additional software or modify your root filesystem, you just have to start it as described above and make the operations required on the filesystem.
+To install additional software or to modify your root file system, you just have to:
-* Start the virtual machine (directly using virsh or the vnx_modify_rootfs utility):
+<ul>
-  /usr/share/vnx/bin/vnx_modify_rootfs rootfs_fedora.xml
+<li>Start a virtual machine from it:</li>
-* Install the software:
+ vnx --modify-rootfs vnx_rootfs_kvm_fedora.qcow2
-  yum install ...
+<li>Check network connectivity. Maybe you have to activate the network interface by hand:</li>
-* Stop the machine with:
+  dhclient eth1
+Note: use "ip link show" to know which network interface to use.
+<li>Do the modifications you want.</li>
+<li>Finally, halt the system using:</li>
   vnx_halt
+</ul>
+== Updating VNXACED ==
+You can automatically update the VNXACE daemon with the following command:
+ vnx --modify-rootfs vnx_rootfs_kvm_fedora.qcow2 --update-aced -y
+If VNXACE daemon is not updated automatically, you can do it manually by accessing the virtual machine console and type:
+ mount /dev/sdb /mnt/
+ perl /mnt/vnxaced-lf/install_vnxaced
 == Known problems ==

Difference between revisions of "Vnx-rootfsfedora"

Latest revision as of 00:07, 3 November 2016

Contents

Basic installation

Configuration

Installing additional software

Updating VNXACED

Known problems

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