Remove CentOS-specific code and assets

CentOS stemcells are no longer built, so this drops dead stages,
assets, and code paths. Also removes the default_su_directive
override (already removed on ubuntu-noble), which silently overrode
the correct 'su root syslog' set globally in ubuntu-logrotate.conf.

Author: neddp

bosh-stemcell/lib/shellout_types/service.rb

@@ -27,7 +27,7 @@ def check_service_enabled(runlevel)
       stdout, stderr, status = @chroot.run("cat", "/etc/*release")
       raise stderr.to_s if status != 0
 
-      raise "Cannot determine Linux distribution: #{stdout}" unless /Ubuntu|CentOS|openSUSE/.match?(stdout)
+      raise "Cannot determine Linux distribution: #{stdout}" unless /Ubuntu|openSUSE/.match?(stdout)
 
       check_is_enabled_systemctl
     end

bosh-stemcell/spec/support/stemcell_shared_examples.rb

@@ -160,13 +160,5 @@
         end
       end
     end
-
-    describe "default su directive" do
-      describe file("/etc/logrotate.d/default_su_directive") do
-        it "does `su root root` after any leading comments" do
-          expect(subject.content).to match(/\A(#.*\n)*su root root\Z/)
-        end
-      end
-    end
   end
 end

stemcell_builder/stages/bosh_audit_centos/apply.sh

@@ -37,15 +37,15 @@ add_on_exit "umount ${image_mount_point}"
 # == Guide to variables in this script (all paths are defined relative to the real root dir, not the chroot)
 
 # work: the base working directory outside the chroot
-#      eg: /mnt/stemcells/aws/xen/centos/work/work
+#      eg: /mnt/stemcells/aws/xen/ubuntu/work/work
 # disk_image: path to the stemcell disk image
-#      eg: /mnt/stemcells/aws/xen/centos/work/work/aws-xen-centos.raw
+#      eg: /mnt/stemcells/aws/xen/ubuntu/work/work/aws-xen-ubuntu.raw
 # device: path to the loopback devide mapped to the entire disk image
 #      eg: /dev/loop0
 # loopback_dev: device node mapped to the main partition in disk_image
 #      eg: /dev/mapper/loop0p1
 # image_mount_point: place where loopback_dev is mounted as a filesystem
-#      eg: /mnt/stemcells/aws/xen/centos/work/work/mnt
+#      eg: /mnt/stemcells/aws/xen/ubuntu/work/work/mnt
 
 # Generate random password
 random_password=$(tr -dc A-Za-z0-9_ < /dev/urandom | head -c 16)

stemcell_builder/stages/image_install_grub/apply.sh

@@ -38,17 +38,17 @@ add_on_exit "umount ${image_mount_point}/boot/efi"
 # == Guide to variables in this script (all paths are defined relative to the real root dir, not the chroot)
 
 # work: the base working directory outside the chroot
-#      eg: /mnt/stemcells/aws/xen/centos/work/work
+#      eg: /mnt/stemcells/aws/xen/ubuntu/work/work
 # disk_image: path to the stemcell disk image
-#      eg: /mnt/stemcells/aws/xen/centos/work/work/aws-xen-centos.raw
+#      eg: /mnt/stemcells/aws/xen/ubuntu/work/work/aws-xen-ubuntu.raw
 # device: path to the loopback devide mapped to the entire disk image
 #      eg: /dev/loop0
 # loopback_efi_dev: device node mapped to the EFI boot ("/boot/efi") partition in disk_image
 #      eg: /dev/mapper/loop0p1
 # loopback_root_dev: device node mapped to the root partition ("/") in disk_image
 #      eg: /dev/mapper/loop0p2
 # image_mount_point: place where loopback_dev is mounted as a filesystem
-#      eg: /mnt/stemcells/aws/xen/centos/work/work/mnt
+#      eg: /mnt/stemcells/aws/xen/ubuntu/work/work/mnt
 
 # Generate random password
 random_password=$(tr -dc A-Za-z0-9_ < /dev/urandom | head -c 16)

stemcell_builder/stages/image_install_grub_efi/apply.sh

@@ -42,15 +42,15 @@ add_on_exit "umount ${image_mount_point}/boot"
 # == Guide to variables in this script (all paths are defined relative to the real root dir, not the chroot)
 
 # work: the base working directory outside the chroot
-#      eg: /mnt/stemcells/aws/xen/centos/work/work
+#      eg: /mnt/stemcells/aws/xen/ubuntu/work/work
 # disk_image: path to the stemcell disk image
-#      eg: /mnt/stemcells/aws/xen/centos/work/work/aws-xen-centos.raw
+#      eg: /mnt/stemcells/aws/xen/ubuntu/work/work/aws-xen-ubuntu.raw
 # device: path to the loopback devide mapped to the entire disk image
 #      eg: /dev/loop0
 # loopback_dev: device node mapped to the main partition in disk_image
 #      eg: /dev/mapper/loop0p1
 # image_mount_point: place where loopback_dev is mounted as a filesystem
-#      eg: /mnt/stemcells/aws/xen/centos/work/work/mnt
+#      eg: /mnt/stemcells/aws/xen/ubuntu/work/work/mnt
 
 # Generate random password
 random_password=$(tr -dc A-Za-z0-9_ < /dev/urandom | head -c 16)

stemcell_builder/stages/image_install_grub_softlayer_two_partitions/apply.sh

@@ -32,15 +32,10 @@ install_logrotate_cron_script() {
   sed -i -e 's/^\s*\(\/usr\/sbin\/logrotate\)\b/nice -n 19 ionice -c3 \1/' "$chroot/usr/bin/logrotate-cron"
 }
 
-install_default_su_directive() {
-  cp -f "$assets_dir/default_su_directive" "$chroot/etc/logrotate.d/default_su_directive"
-}
-
 install_logrotate_conf
 install_setup_logrotate_script
 seed_default_logrotate_cronjob
 install_logrotate_cron_script
-install_default_su_directive
 
 ## TODO: either remove /etc/logrotate.d/{wtmp,btmp}
 ## or remove it from logrotate.conf and copy over the default created wtmp,btmp files