mount with compression flags during install instead of compressing later

alpine-make-vm-image

@@ -216,7 +216,7 @@ fs_progs_pkg() {
 # Binds the directory $1 at the mountpoint $2 and sets propagation to private.
 mount_bind() {
 	mkdir -p "$2"
-	mount --bind "$1" "$2"
+	mount -o noatime$COMPRESSFLAGS --bind "$1" "$2"
 	mount --make-private "$2"
 }
 
@@ -361,6 +361,12 @@ done
 
 export ROOTFS
 
+COMPRESSFLAGS=
+if [ "$ROOTFS" = 'btrfs' ]; then
+		COMPRESSFLAGS=',compress=zstd'
+fi
+export COMPRESSFLAGS
+
 case "$ALPINE_BRANCH" in
 	[0-9]*) ALPINE_BRANCH="v$ALPINE_BRANCH";;
 esac
@@ -481,12 +487,6 @@ fi
 #-----------------------------------------------------------------------
 einfo 'Setting up extlinux bootloader'
 
-COMPRESSFLAGS=
-if [ "$ROOTFS" = 'btrfs' ]; then
-		COMPRESSFLAGS=',compress=zstd'
-fi
-export COMPRESSFLAGS
-
 _apk add --root . --no-scripts syslinux
 setup_extlinux . "UUID=$root_uuid" "$ROOTFS" "$KERNEL_FLAVOR" "$SERIAL_PORT"
 

example/configure.sh

@@ -46,9 +46,5 @@ step 'Creating authorized_keys for root'
 mkdir -p /root/.ssh/
 echo "$SSHPUBKEY" >> /root/.ssh/authorized_keys
 
-if [ "$ROOTFS" = 'btrfs' ]; then
-	step 'Compressing btrfs'
-	btrfs filesystem defragment -r -czstd /
-fi