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Add fstrim to disk and filesystem image creation 

Tests show that it may reduce disk usage a bit vs. just doing the
fallocate --dig-holes.
This commit is contained in:
Brian C. Lane 2021-09-24 12:04:14 -07:00
parent bd9197c76e
commit a3810024ac
1 changed files with 13 additions and 3 deletions
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16
src/pylorax/installer.py
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@ -416,12 +416,17 @@ def novirt_install(opts, disk_img, disk_size, cancel_func=None, tar_img=None):
setfiles_args = ["-e", "/proc", "-e", "/sys",
"/etc/selinux/targeted/contexts/files/file_contexts", "/"]
execWithRedirect("sync", ["-f", dirinstall_path])
if "--dirinstall" in args:
# setfiles may not be available, warn instead of fail
try:
execWithRedirect("setfiles", setfiles_args, root=dirinstall_path)
except (subprocess.CalledProcessError, OSError) as e:
log.warning("Running setfiles on install tree failed: %s", str(e))
if os.path.exists(disk_img):
execWithRedirect("du", ["-B", "1", disk_img])
execWithRedirect("fstrim", ["-v", dirinstall_path])
else:
with PartitionMount(disk_img) as img_mount:
if img_mount and img_mount.mount_dir:
@ -432,7 +437,10 @@ def novirt_install(opts, disk_img, disk_size, cancel_func=None, tar_img=None):
# For image installs, run fstrim to discard unused blocks. This way
# unused blocks do not need to be allocated for sparse image types
execWithRedirect("fstrim", [img_mount.mount_dir])
execWithRedirect("du", ["-B", "1", disk_img])
execWithRedirect("fstrim", ["-v", img_mount.mount_dir])
if os.path.exists(disk_img):
execWithRedirect("du", ["-B", "1", disk_img])
except (subprocess.CalledProcessError, OSError) as e:
log.error("Running anaconda failed: %s", e)
@ -524,8 +532,10 @@ def novirt_install(opts, disk_img, disk_size, cancel_func=None, tar_img=None):
if rc:
raise InstallError("novirt_install mktar failed: rc=%s" % rc)
else:
# For raw disk images, use fallocate to deallocate unused space
execWithRedirect("fallocate", ["--dig-holes", disk_img], raise_err=True)
# Examine the image for sections that can be made sparse
execWithRedirect("du", ["-B", "1", disk_img])
execWithRedirect("fallocate", ["--dig-holes", "-v", disk_img], raise_err=True)
execWithRedirect("du", ["-B", "1", disk_img])
# For make_tar_disk, wrap the result in a tar file, and remove the original disk image.
if opts.make_tar_disk: