builder: run/schedule a SELinux relabel if needed

If the guest uses SELinux, then make sure to run a relabel (or at least
schedule one) after the image build: this way the template is
relabelled, or at least it will do that at the next boot, without the
need for the user to ask for a relabel.

This just covers the case of building a new image with no additional
operations on it though.

builder/website/centos.sh

@@ -96,4 +96,6 @@ virt-install \
     --nographics \
     --noreboot
 
+DO_RELABEL=1
+
 source $(dirname "$0")/compress.sh $output

builder/website/compress.sh

@@ -20,10 +20,25 @@
 
 output=$1
 
+relabel_args=()
+
+if [ -n "$DO_RELABEL" ]; then
+    os_arch=$(uname -m)
+    guest_arch=$(virt-inspector -a "$output" | virt-inspector --xpath "string(/operatingsystems/operatingsystem/arch)")
+
+    if [ "$os_arch" = "$guest_arch" ] || [ "$os_arch" = "x86_64" -a "$guest_arch" = "i386" ]; then
+        # this is what --selinux-relabel should really do, but do it ourselves
+        # in the meanwhile -- see RHBZ#1089100.
+        relabel_args+=(--run-command "setfiles /etc/selinux/targeted/contexts/files/file_contexts /")
+    else
+        relabel_args+=(--selinux-relabel)
+    fi
+fi
+
 # Sysprep (removes logfiles and so on).
 # Note this also touches /.autorelabel so the further installation
 # changes that we make will be labelled properly at first boot.
-virt-sysprep -a $output
+virt-sysprep -a $output "${relabel_args[@]}"
 
 # Sparsify.
 mv $output $output.old

builder/website/fedora-aarch64.sh

@@ -103,4 +103,6 @@ virt-install \
 cp $vars $output-nvram
 xz --best $output-nvram
 
+DO_RELABEL=1
+
 source $(dirname "$0")/compress.sh $output

builder/website/fedora-armv7l.sh

@@ -92,4 +92,6 @@ virt-install \
     --nographics \
     --noreboot
 
+DO_RELABEL=1
+
 source $(dirname "$0")/compress.sh $output

builder/website/fedora-i686.sh

@@ -100,4 +100,6 @@ virt-install \
     --nographics \
     --noreboot
 
+DO_RELABEL=1
+
 source $(dirname "$0")/compress.sh $output

builder/website/fedora-ppc64.sh

@@ -92,4 +92,6 @@ virt-install \
     --nographics \
     --noreboot
 
+DO_RELABEL=1
+
 source $(dirname "$0")/compress.sh $output

builder/website/fedora-ppc64le.sh

@@ -92,4 +92,6 @@ virt-install \
     --nographics \
     --noreboot
 
+DO_RELABEL=1
+
 source $(dirname "$0")/compress.sh $output

builder/website/fedora.sh

@@ -100,4 +100,6 @@ virt-install \
     --nographics \
     --noreboot
 
+DO_RELABEL=1
+
 source $(dirname "$0")/compress.sh $output

builder/website/rhel-aarch64.sh

@@ -159,4 +159,6 @@ cp $vars $output-nvram
 guestfish --rw -a $output -m $guestroot \
   upload $yum /etc/yum.repos.d/download.devel.redhat.com.repo
 
+DO_RELABEL=1
+
 source $(dirname "$0")/compress.sh $output

builder/website/rhel-ppc64.sh

@@ -140,4 +140,6 @@ virt-install \
 guestfish --rw -a $output -m $guestroot \
   upload $yum /etc/yum.repos.d/download.devel.redhat.com.repo
 
+DO_RELABEL=1
+
 source $(dirname "$0")/compress.sh $output

builder/website/rhel-ppc64le.sh

@@ -140,4 +140,6 @@ virt-install \
 guestfish --rw -a $output -m $guestroot \
   upload $yum /etc/yum.repos.d/download.devel.redhat.com.repo
 
+DO_RELABEL=1
+
 source $(dirname "$0")/compress.sh $output

builder/website/rhel.sh

@@ -225,4 +225,6 @@ guestfish --rw -a $output -m $guestroot \
   upload $yum /etc/yum.repos.d/download.devel.redhat.com.repo
 fi
 
+DO_RELABEL=1
+
 source $(dirname "$0")/compress.sh $output

builder/website/scientificlinux.sh

@@ -86,4 +86,6 @@ virt-install \
     --nographics \
     --noreboot
 
+DO_RELABEL=1
+
 source $(dirname "$0")/compress.sh $output