Downloaded the CM GPL Script for Xen from https://www.virtualmin.com/documentation/cloudmin/gpl
Running it I found a couple issues. The script installs xen and xen-libs from the repo chosen but those packages don't exist for CentOS 7 so I changed the script to read xen46 and xen46-libs. The script runs fine up until you hit the firewall section and then the grub loader.
Opening port 10000 on IPtables firewall .. IPtables is not available .. failed ... Configuring GRUB to boot Xen-capable kernel .. GRUB v1 not found on this system! Cloudmin GPL has been successfully installed. However, you will need to reboot to activate the new Xen-capable kernel before any Xen instances can be created. ---
I fixed the grub loader to use the new Xen kernel and then rebooted. Server come up fine. When I try to use the xl command, I get errors.
[root@localhost ~]# xl info xc: error: Could not obtain handle on privileged command interface (2 = No such file or directory): Internal error libxl: error: libxl.c:116:libxl_ctx_alloc: cannot open libxc handle: No such file or directory cannot init xl context
I'm stumped.
Status:
Active
Comments
Submitted by andreychek on Tue, 07/19/2016 - 00:15 Comment #1
Howdy -- hmm, that's an unusual error! Sounds like there's a missing dependency.
I did some Googling, and see other examples of that occurring on CentOS 7, but most of those issues don't have solutions listed.
I'll continue to do some research into that, as we'd certainly like for Xen to work out of the box.
But I wanted to mention in the meantime that I'd highly recommend KVM over Xen if possible. It's far better supported by the various distros in question, but especially so on CentOS.
Problem is that I already have Xen VMs on CentOS 6 so moving to 7 is next. I tried the instructions here: http://xen.crc.id.au/support/guides/install/ with no luck. This is the same repo the gpl script uses. I emailed the package maintainer to see if he has any advice on this.
Submitted by JamieCameron on Tue, 07/19/2016 - 09:34 Comment #3
Can you tell us more about the changes you made to the install script? I'd like to test this out, and maybe include your changes in the official script.
I ended up nuking my script when I wiped the machine clean to start over fresh. I then followed the steps on http://xen.crc.id.au/support/guides/install/ exactly to the T. Lo and behold:
I'll try tinkering with the script again but I can see it would work if modified for all the changes in CentOS 7.
You guys never added back the ability to attach a file to EACH comment so, here is what I have so far for tonight. I have not yet been able to test the changes you make to the virt stuff. The file you check for doesn't seem to exist on CentOS 7 so not sure if that's relevant or not. I'll work more on it tomorrow as I test each piece. I'm no pro like you guys but this script, as it sits will only work on RedHat/CentOS 7 not 6 because the Xen versions differ. With the repo you guys use, for CentOS 6 the package is xen but on CentOS 7 it's xen44, xen45 or xen46. I chose the latest. Xen 4.7 is coming out soon so I'm sure he'll have a xen47 before too long. I need to figure out how to parse those options and grab the latest and install that. There is only one kernel-xen in the CentOS 7 repo so, all good there. I did find an issue with the firewall that I'll need to check too.
Post Edited - See code below
Here's what I have. Time to test if no one else is brave. haha...
#!/bin/sh # cloudmin-gpl-redhat-install.sh # Copyright 2005-2016 Virtualmin, Inc. # # Installs Cloudmin GPL for Xen and all dependencies on a CentOS, RHEL or # Fedora system. # # Contributions from Steffan Cline steffan@hldns.com and Chris Buxton chris.buxton@me.com VER=1.2 OS=`cat /etc/redhat-release | awk '{$1=$1};1'` # Define functions yesno () { while read line; do case $line in y|Y|Yes|YES|yes|yES|yEs|YeS|yeS) return 0 ;; n|N|No|NO|no|nO) return 1 ;; *) printf "\nPlease enter y or n: " ;; esac done } # Ask the user first cat <<EOF ******************************************************************************* * Welcome to the Cloudmin GPL for Xen installer, version $VER * ******************************************************************************* Operating systems supported by this installer are: Fedora Core 3-12 on i386 and x86_64 CentOS and RHEL 3-7 on i386 and x86_64 If $OS is not listed above, this script will fail (and attempting to run it on an unsupported OS is not recommended, or...supported). EOF printf " Continue? (y/n) " if ! yesno then exit fi echo "" # Cleanup old repo files rm -f /etc/yum.repos.d/vm2* /etc/yum.repos.d/cloudmin* # Check for yum echo Checking for yum .. if [ ! -x /usr/bin/yum ]; then echo .. not installed. The Cloudmin installer requires YUM to download packages echo "" exit 1 fi echo .. found OK echo "" # Make sure we have wget echo "Installing wget .." yum install -y wget echo ".. done" echo "" # Check for wget or curl echo "Checking for curl or wget..." if [ -x "/usr/bin/curl" ]; then download="/usr/bin/curl -s " elif [ -x "/usr/bin/wget" ]; then download="/usr/bin/wget -nv -O -" else echo "No web download program available: Please install curl or wget" echo "and try again." exit 1 fi echo "found $download" echo "" # Create Cloudmin licence file echo Creating Cloudmin licence file cat >/etc/server-manager-license <<EOF SerialNumber=GPL LicenseKey=GPL EOF chmod 600 /etc/server-manager-license # Download GPG keys echo Downloading GPG keys for packages .. $download "http://software.virtualmin.com/lib/RPM-GPG-KEY-virtualmin" >/etc/pki/rpm-gpg/RPM-GPG-KEY-virtualmin if [ "$?" != 0 ]; then echo .. download failed exit 1 fi $download "http://software.virtualmin.com/lib/RPM-GPG-KEY-webmin" >/etc/pki/rpm-gpg/RPM-GPG-KEY-webmin if [ "$?" != 0 ]; then echo .. download failed exit 1 fi echo .. done echo "" # Import keys echo Importing GPG keys .. rpm -q gpg-pubkey-a0bdbcf9-42d1d837 || rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-virtualmin rpm -q gpg-pubkey-11f63c51-3c7dc11d || rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-webmin echo .. done echo "" # Setup the YUM repo file echo Creating YUM repository for Cloudmin packages .. cat >/etc/yum.repos.d/cloudmin.repo <<EOF [cloudmin-universal] name=Cloudmin Distribution Neutral baseurl=http://cloudmin.virtualmin.com/gpl/universal/ enabled=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-virtualmin gpgcheck=1 EOF echo .. done echo "" # Enable Xen kernels repo, if on CentOS #yum info kernel-xen >/dev/null 2>&1 #if [ "$?" != 0 ]; then # echo Enabling Xen kernel repo for $OS .. # yum install wget # yum install http://au1.mirror.crc.id.au/repo/kernel-xen-release-latest.noarch.rpm # if [ "$?" != 0 ]; then # echo .. repo install failed # exit 1 # fi # echo .. done # echo "" #fi # YUM install Perl, modules and other dependencies echo Installing required Perl modules using YUM .. yum install -y perl openssl perl-Net-SSLeay vixie-cron bind bind-utils lsof perl-Data-Dumper if [ "$?" != 0 ]; then echo .. install failed exit 1 fi yum install -y perl-JSON yum install -y dhcp yum install -y openssh-clients echo .. done echo "" # YUM install Steven Haigh's Xen repo, Xen, modules and other dependencies # This section will pick the latest verion of Xen available. The repo only has 1 version # of xen for CentOS6/RHEL6. For CentOS7/RHEL7 there are options of xen44, xen45 and xen46 as of 7/20/2016. # xen.x86_64 (4.2) will be chosen for CentOS6/RHEL6 and xen46.x86_64 for CentOS7/RHEL7. If a newer # version of Xen is available such as xen47, it will then be the default for the newer OS. echo Installing required Xen modules using YUM .. xen_installed_version=$(yum list installed xen* | awk '/^xen[[:digit:]]*\.x86_64/{print $1}') xen_latest_version=$(yum list xen* | awk '/^xen[[:digit:]]*\.x86_64/{print $1}' | sort | tail -1) if [[ "$xen_installed_version" == "" ]]; then # do NOT change the order or Xen will fail miserably yum install -y bridge-utils yum install -y http://au1.mirror.crc.id.au/repo/kernel-xen-release-latest.noarch.rpm yum install -y $xen_latest_version yum install -y kernel-xen else echo "You already have the $xen_installed_version package installed. This installer will not overwrite an existing Xen install." fi echo .. done echo "" # disable SELinux echo Disabling SELinux .. sed -i "s/SELINUX=enforcing/SELINUX=disabled/" /etc/sysconfig/selinux /usr/sbin/setenforce 0 echo .. done echo "" # Check for virbrN interfaces echo "Checking for and disabling virbr interfaces .." ifaces=`/sbin/ifconfig -a | grep "^virbr" | cut -d " " -f 1` if [ "$ifaces" != "" ]; then echo ".. need to disable $ifaces .." for iface in $ifaces; do /sbin/ifconfig $iface 0.0.0.0 down done echo ".. done" else echo ".. none found" fi if [ -r /etc/libvirt/qemu/networks/default.xml ]; then cp /etc/libvirt/qemu/networks/default.xml /etc/libvirt/qemu/networks/default.xml.disabled cat /dev/null >/etc/libvirt/qemu/networks/default.xml fi echo "" # YUM install webmin, theme and Cloudmin echo Installing Cloudmin packages using YUM .. yum install -y webmin wbm-server-manager wbt-virtual-server-theme wbt-virtual-server-mobile wbm-security-updates if [ "$?" != 0 ]; then echo .. install failed exit 1 fi mkdir -p /xen echo .. done echo "" # Configure Webmin to use theme echo Configuring Webmin .. grep -v "^preroot=" /etc/webmin/miniserv.conf >/tmp/miniserv.conf.$$ echo preroot=authentic-theme >>/tmp/miniserv.conf.$$ cat /tmp/miniserv.conf.$$ >/etc/webmin/miniserv.conf rm -f /tmp/miniserv.conf.$$ grep -v "^theme=" /etc/webmin/config >/tmp/config.$$ echo theme=authentic-theme >>/tmp/config.$$ cat /tmp/config.$$ >/etc/webmin/config rm -f /tmp/config.$$ /etc/webmin/restart echo .. done echo "" # Setup BIND zone for virtual systems basezone=`hostname -d` if [ "$basezone" = "" ]; then basezone=example.com fi zone="cloudmin.$basezone" echo Creating DNS zone $zone .. /usr/libexec/webmin/server-manager/setup-bind-zone.pl --zone $zone --auto-view if [ "$?" != 0 ]; then echo .. failed else echo xen_zone=$zone >>/etc/webmin/server-manager/config echo xen_zone=$zone >>/etc/webmin/server-manager/this echo .. done fi echo "" # Open Webmin firewall port - default for CentOS6/RHEL6 echo Opening port 10000 on IPtables firewall .. ports="10000 10001 10002 10003 10004 10005 843" /usr/libexec/webmin/firewall/open-ports.pl $ports if [ "$?" != 0 ]; then echo .. failed else echo .. done fi echo "" # Open firewalld ports - default for CentOS7/RHEL7 if [ -x /usr/bin/firewall-cmd ]; then echo Opening port 10000 on Firewalld firewall .. for port in $ports; do /usr/bin/firewall-cmd --add-port=$port/tcp >/dev/null /usr/bin/firewall-cmd --permanent --add-port=$port/tcp >/dev/null done echo .. done echo "" fi # Use Xen kernel # echo Configuring GRUB to boot Xen-capable kernel .. # /usr/libexec/webmin/server-manager/setup-xen-kernel.pl # Not needed since the kernel-xen package already enables the xen kernel echo Setting the OS to always boot the xen kernel... sed -i "s/DEFAULTKERNEL=kernel/DEFAULTKERNEL=kernel-xen/" /etc/sysconfig/kernel echo .. done echo "" # Tell user about need to reboot hostname=`hostname` echo Cloudmin GPL has been successfully installed. However, you will need to echo reboot to activate the new Xen-capable kernel before any Xen instances echo can be created. echo echo Once this is done, you can log into Cloudmin at : echo https://$hostname:10000/ # All done!I would suggest that you add some code that sees no bridges and offers to create one so that a user trying the product can immediately create a new VM with minimal hassle.
Submitted by masterg0g0 on Sat, 07/23/2016 - 10:32 Pro Licensee Comment #8
I agree to steffan, the bridge setup is a pain, if cloudmin has to compete with the likes of proxmox.. you need to make it more user friendly.. some of network wizard like how there is for virtualmin..
I am merely a novice with this but I tried to create the bridge through the webmin interface and had some issues with it locking myself out of the server. I went to the server and changed the files manually and got it up and working.
Has anyone else tested this to see if further refinements are needed?
Submitted by andreychek on Sat, 07/23/2016 - 14:39 Comment #10
This is actually something we're hoping to simplify. We're going to talk about making the bridge setup automatic, as part of a wizard during the setup process.
Any progress with this?
Submitted by andreychek on Tue, 08/09/2016 - 09:18 Comment #12
Sorry, not yet, but it is still on the todo list!
Hopefully this will be merged. I had a couple people try out the product but then had to come back to me for my script. It'll be cool to see what you come up with regarding setting up a bridge to get it immediately ready to start creating VMs.
Has this been applied to the script so you have a working version for download?
Submitted by andreychek on Tue, 09/27/2016 - 09:18 Comment #15
Sorry for the delay!
Simplifying the bridge setup is something we'd like to do, but unfortunately may take some time to complete. That can be tricky to do properly, since it's changing the networking settings of a server, which can cause downtime if not done properly.
In the meantime it would need to be setup manually, sorry!
The bridge part can wait. The script as-is on the site does not work on CentOS 7. The changes I provided create a working environment and everything short of the bridge setup. I provided this work so people don't get put off by a non-working installer. My request is that you merge what I've provided for now.
Submitted by andreychek on Tue, 09/27/2016 - 09:41 Comment #17
Ah, my bad -- I saw the last few comments were in reference to creating a wizard for setting up bridging, and completely overlooked the script you had shared above.
Do you happen to have a diff of yours as compared to the original?
In the meantime I'll follow up with Jamie about including these changes the official script. Thanks!
Submitted by just_me on Tue, 09/27/2016 - 11:06 Comment #18
Bridge setup automatically is something i would endorse too, had myself also locked out once too :-)