Bring back support for xen,lxc and qemu

The packages to install are now attributes.

Change-Id: I84ce8ba5960bfaf93b9b239631499e9f6ba56aae

attributes/default.rb

@@ -223,6 +223,9 @@ when "fedora", "redhat", "centos", "suse" # :pragma-foodcritic: ~FC024 - won't f
   if platform == "suse"
     default["openstack"]["compute"]["platform"]["common_packages"] = ["openstack-nova"]
     default["openstack"]["compute"]["ceilometer"]["api"]["auth"]["cache_dir"] = "/var/cache/ceilometer"
+    default["openstack"]["compute"]["platform"]["kvm_packages"] = ["kvm"]
+    default["openstack"]["compute"]["platform"]["xen_packages"] = ["kernel-xen", "xen", "xen-tools"]
+    default["openstack"]["compute"]["platform"]["lxc_packages"] = ["lxc"]
   end
 
 when "ubuntu"

recipes/libvirt.rb

@@ -26,6 +26,85 @@ platform_options["libvirt_packages"].each do |pkg|
   end
 end
 
+def set_boot_kernel_and_trigger_reboot(flavor='default')
+  # only default and xen flavor is supported by this helper right now
+  default_boot, current_default = 0, nil
+
+  # parse menu.lst, to find boot index for selected flavor
+  File.open('/boot/grub/menu.lst') do |f|
+    f.lines.each do |line|
+      current_default = line.scan(/\d/).first.to_i if line.start_with?('default')
+
+      if line.start_with?('title')
+        if flavor.eql?('xen')
+          # found boot index
+          break if line.include?('Xen')
+        else
+          # take first kernel as default, unless we are searching for xen
+          # kernel
+          break
+        end
+        default_boot += 1
+      end
+    end
+  end
+
+  # change default option for /boot/grub/menu.lst
+  unless current_default.eql?(default_boot)
+    puts "changed grub default to #{default_boot}"
+    %x[sed -i -e "s;^default.*;default #{default_boot};" /boot/grub/menu.lst]
+  end
+
+  # trigger reboot through reboot_handler, if kernel-$flavor is not yet
+  # running
+  unless %x[uname -r].include?(flavor)
+    node.run_state["reboot"] = true
+  end
+end
+
+# on suse nova-compute don't depends on any virtualization mechanism
+case node["platform"]
+when "suse"
+  case node["openstack"]["compute"]["libvirt"]["virt_type"]
+  when "kvm"
+    node["openstack"]["compute"]["platform"]["kvm_packages"].each do |pkg|
+      package pkg do
+        action :install
+      end
+    end
+    execute "loading kvm modules" do
+      command "grep -q vmx /proc/cpuinfo && /sbin/modprobe kvm-intel; grep -q svm /proc/cpuinfo && /sbin/modprobe kvm-amd; /sbin/modprobe vhost-net"
+    end
+    # NOTE(saschpe): Allow switching from XEN to KVM:
+    set_boot_kernel_and_trigger_reboot
+
+  when "xen"
+    node["openstack"]["compute"]["platform"]["xen_packages"].each do |pkg|
+      package pkg do
+        action :install
+      end
+    end
+    set_boot_kernel_and_trigger_reboot('xen')
+
+  when "qemu"
+    node["openstack"]["compute"]["platform"]["kvm_packages"].each do |pkg|
+      package pkg do
+        action :install
+      end
+    end
+
+  when "lxc"
+    node["openstack"]["compute"]["platform"]["lxc_packages"].each do |pkg|
+      package pkg do
+        action :install
+      end
+    end
+    service "boot.cgroup" do
+      action [:enable, :start]
+    end
+  end
+end
+
 group node["openstack"]["compute"]["libvirt"]["group"] do
   append true
   members [node["openstack"]["compute"]["group"]]

spec/libvirt-opensuse_spec.rb

@@ -0,0 +1,88 @@
+require "spec_helper"
+
+describe "openstack-compute::libvirt" do
+  describe "suse" do
+    before do
+      compute_stubs
+      @chef_run = ::ChefSpec::ChefRunner.new ::OPENSUSE_OPTS
+      @chef_run.converge "openstack-compute::libvirt"
+    end
+
+    it "installs libvirt packages" do
+      expect(@chef_run).to install_package "libvirt"
+    end
+
+    it "starts libvirt" do
+      expect(@chef_run).to start_service "libvirtd"
+    end
+
+    it "starts libvirt on boot" do
+      expect(@chef_run).to set_service_to_start_on_boot "libvirtd"
+    end
+
+    describe "libvirtd" do
+      before do
+        @file = @chef_run.template "/etc/sysconfig/libvirtd"
+      end
+
+      it "has proper owner" do
+        expect(@file).to be_owned_by "root", "root"
+      end
+
+      it "has proper modes" do
+        expect(sprintf("%o", @file.mode)).to eq "644"
+      end
+
+      it "template contents" do
+        pending "TODO: implement"
+      end
+
+      it "notifies libvirt-bin restart" do
+        expect(@file).to notify "service[libvirt-bin]", :restart
+      end
+    end
+
+    it "installs kvm packages" do
+      expect(@chef_run).to install_package "kvm"
+    end
+
+    it "installs qemu packages" do
+      chef_run = ::ChefSpec::ChefRunner.new ::OPENSUSE_OPTS do |node|
+        node.set["openstack"]["compute"]["libvirt"]["virt_type"] = "qemu"
+      end
+      chef_run.converge "openstack-compute::libvirt"
+      expect(chef_run).to install_package "kvm"
+    end
+
+    it "installs xen packages" do
+      chef_run = ::ChefSpec::ChefRunner.new ::OPENSUSE_OPTS do |node|
+        node.set["openstack"]["compute"]["libvirt"]["virt_type"] = "xen"
+      end
+      chef_run.converge "openstack-compute::libvirt"
+      ["kernel-xen", "xen", "xen-tools"].each do |pkg|
+        expect(chef_run).to install_package pkg
+      end
+    end
+
+    describe "lxc" do
+      before do
+        @chef_run_lxc = ::ChefSpec::ChefRunner.new ::OPENSUSE_OPTS do |node|
+          node.set["openstack"]["compute"]["libvirt"]["virt_type"] = "lxc"
+        end
+        @chef_run_lxc.converge "openstack-compute::libvirt"
+      end
+
+      it "installs packages" do
+        expect(@chef_run_lxc).to install_package "lxc"
+      end
+
+      it "starts boot.cgroupslxc" do
+        expect(@chef_run_lxc).to start_service "boot.cgroup"
+      end
+
+      it "starts boot.cgroups on boot" do
+        expect(@chef_run_lxc).to set_service_to_start_on_boot "boot.cgroup"
+      end
+    end
+  end
+end

spec/spec_helper.rb

@@ -1,6 +1,11 @@
 require "chefspec"
 
 ::LOG_LEVEL = :fatal
+::OPENSUSE_OPTS = {
+  :platform  => "opensuse",
+  :version   => "12.3",
+  :log_level => ::LOG_LEVEL
+}
 ::REDHAT_OPTS = {
   :platform  => "redhat",
   :version   => "6.3",