From: František Dvořák <valtri@civ.zcu.cz>
Date: Thu, 1 Oct 2015 16:32:42 +0000 (+0200)
Subject: LXC!
X-Git-Tag: v1.0.0~21
X-Git-Url: http://scientific.zcu.cz/git/?a=commitdiff_plain;h=3d7355962b29a50504fcd659123a81445d8afdbd;p=virtualization.git

LXC!
---

diff --git a/lxc.sh b/lxc.sh
new file mode 100755
index 0000000..fbbed84
--- /dev/null
+++ b/lxc.sh
@@ -0,0 +1,200 @@
+#!/bin/sh -e
+
+if [ -z $1 ]; then
+	echo "Usage:"
+	echo
+	echo "$0 cfg_hostname.sh [image | setup | xml | define | start]"
+	echo "$0 cfg_hostname.sh [undefine | delete]"
+	exit 1
+fi
+. ./$1 || exit 1
+
+IMAGE_POOL=/var/lib/lxc
+
+IMAGE_FILE=${IMAGE_POOL}/${FACTER_hostname}
+IMAGE_SOURCE=/var/lib/lxc/debian7-x86_64.tar.gz
+VIRSH_ARGS="-c lxc://"
+
+if [ -z $FACTER_fqdn ]; then
+	echo "ERROR: no facter fqdn settings found"
+	exit 1
+fi
+if [ -z $FACTER_hostname ]; then
+	echo "ERROR: no facter hostname settings found"
+	exit 1
+fi
+
+
+image() {
+	if [ -e ${IMAGE_FILE} ]; then
+		echo "ERROR: image ${IMAGE_FILE} already exists"
+		exit 1
+	fi
+
+    mkdir ${IMAGE_FILE}
+    (cd ${IMAGE_FILE}; tar xzf ${IMAGE_SOURCE})
+}
+
+
+setup() {
+	cd ${IMAGE_FILE} || exit 1
+
+    cp -vp /etc/{resolv.conf,apt/sources.list,krb5.conf} ./etc/
+    echo "pts/0" >> etc/securetty
+
+	echo "${FACTER_hostname}" > etc/hostname
+
+	cat << __EOF__ > etc/network/interfaces
+# This file describes the network interfaces available on your system
+# and how to activate them. For more information, see interfaces(5).
+
+# The loopback network interface
+auto lo
+iface lo inet loopback
+
+__EOF__
+	if [ -n "${FACTER_ipaddress}" ]; then
+		if [ "${FACTER_ipaddress}" = 'dhcp' ]; then
+			cat << __EOF__ >> etc/network/interfaces
+auto eth0
+iface eth0 inet dhcp
+
+__EOF__
+		else
+			cat << __EOF__ >> etc/network/interfaces
+auto eth0
+iface eth0 inet static
+        address $FACTER_ipaddress
+        netmask $FACTER_netmask
+        gateway $FACTER_gw
+
+__EOF__
+		fi
+	fi
+	if [ -n "${FACTER_ipaddress6}" ]; then
+		cat << __EOF__ >> etc/network/interfaces
+iface eth0 inet6 static
+	address ${FACTER_ipaddress6}
+	netmask ${FACTER_netmask6}
+	gateway ${FACTER_gw6}
+
+__EOF__
+	fi
+	
+	if [ ! -d root/.ssh ]; then
+		mkdir -p root/.ssh
+	fi
+	if [ ! -f root/.ssh/authorized_keys -a -f /root/.ssh/authorized_keys ]; then
+		cp -v /root/.ssh/authorized_keys root/.ssh
+	fi
+
+	sed -i etc/inittab -e 's/^#T\(0\)/T\1/'
+    sed -i etc/inittab -e 's/^\([2-5]:\)/#\1/'
+
+	cat >> root/.k5login << __EOF__
+dexter@ADMIN.META
+mulac@ADMIN.META
+salvet@ADMIN.META
+valtri@ADMIN.META
+xparak@ADMIN.META
+__EOF__
+
+  cd
+}
+
+
+xml() {
+	i=1
+	for d in ${DISKS}; do
+		XML_DISK="${XML_DISK}
+    <filesystem type='block' accessmode='passthrough'>
+      <source dev='${d}'/>
+      <target dir='/data/${i}'/>
+    </filesystem>"
+		i=$((i+1))
+	done
+	if [ -n "${XENBR}" ]; then
+		XML_NET="
+    <interface type='bridge'>
+      <source bridge='${XENBR}'/>
+      <mac address='${FACTER_macaddress}'/>
+      <model type='virtio'/>
+    </interface>
+
+"
+	else
+		XML_NET="
+    <interface type='network'>
+      <source network='default'/>
+      <mac address='${FACTER_macaddress}'/>
+      <model type='virtio'/>
+    </interface>
+
+"
+	fi
+	cat << __EOF__ > /tmp/machine.xml
+<domain type='lxc'>
+  <name>${FACTER_hostname}</name>
+  <currentMemory unit='MiB'>${SIZE_MEM}</currentMemory>
+  <memory unit='MiB'>${SIZE_MEM}</memory>
+  <vcpu>${SIZE_CPU}</vcpu>
+  <os>
+    <type arch='x86_64'>exe</type>
+    <init>/sbin/init</init>
+  </os>
+  <features>
+    <privnet/>
+  </features>
+
+  <devices>
+
+    <emulator>/usr/lib/libvirt/libvirt_lxc</emulator>
+
+    <filesystem type='mount' accessmode='passthrough'>
+      <source dir='${IMAGE_FILE}'/>
+      <target dir='/'/>
+    </filesystem>${XML_DISK}
+${XML_NET}
+
+    <console type='pty'>
+      <target type='lxc' port='0'/>
+    </console>
+
+  </devices>
+</domain>
+__EOF__
+}
+
+shift
+actions="$@"
+
+if [ -z "${actions}" ]; then
+	actions='image setup xml define start'
+fi
+
+for action in ${actions}; do case ${action} in
+image) image ;;
+setup) setup ;;
+xml) xml ;;
+define)
+	virsh ${VIRSH_ARGS} define /tmp/machine.xml
+	;;
+start)
+	virsh ${VIRSH_ARGS} start ${FACTER_hostname}
+	echo "INFO: ${FACTER_hostname} started"
+	;;
+stop)
+	virsh ${VIRSH_ARGS} destroy ${FACTER_hostname}
+	echo "INFO: ${FACTER_hostname} destroyed"
+	;;
+undefine)
+	virsh ${VIRSH_ARGS} undefine ${FACTER_hostname}
+	;;
+delete)
+	virsh ${VIRSH_ARGS} undefine ${FACTER_hostname} || :
+	rm -fr ${IMAGE_POOL}/${FACTER_hostname}
+	;;
+esac
+done
+
+echo "INFO: $0 done"