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installer: Inject stamp file /etc/coreos-legacy-installer-initramfs #1389

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Merged
openshift-merge-robot merged 1 commit into from
Apr 27, 2020
Merged

installer: Inject stamp file /etc/coreos-legacy-installer-initramfs #1389

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49 changes: 33 additions & 16 deletions src/cmd-buildextend-installer
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Original file line number Diff line number Diff line change
Expand Up @@ -119,6 +119,22 @@ os.mkdir(tmpisoisolinux)
initrd_ignition_padding = 256 * 1024


def generate_initramfs_stampfile(tmpdir, destpath, stampname):
# Create a compressed CPIO archive that can be appended to an initramfs,
# with a single empty file. This is used to differentiate between
# types of initramfs.
with tempfile.TemporaryDirectory(prefix='initramfs', dir=tmpdir) as tmproot:
stamppath = os.path.join(tmproot, stampname)
os.makedirs(os.path.dirname(stamppath), exist_ok=True)
open(stamppath, 'w').close()
run_verbose(['cpio', '-o', '-H', 'newc', '-R', 'root:root',
'--quiet', '--reproducible', '--force-local',
'-D', tmproot, '-O', destpath + '.tmp'],
input=stampname.encode())
run_verbose(['gzip', destpath + '.tmp'])
os.rename(destpath + '.tmp.gz', destpath)


def generate_iso():
# convention for kernel and initramfs names
kernel_img = 'vmlinuz'
Expand Down Expand Up @@ -150,22 +166,14 @@ def generate_iso():
os.chmod(os.path.join(tmpisoimages, file), 0o755)

initramfs = os.path.join(tmpisoimages, 'initramfs.img')
live_initramfs_cpio = None
initramfs_cpio_ext = None
if is_live:
# This stamp file denotes we're in a "live" initramfs
live_initramfs_cpio = os.path.join(tmpdir, 'live-stamp-initramfs')
with tempfile.TemporaryDirectory(prefix='live-initramfs', dir=tmpdir) as livetmpd:
live_initramfs_stamp_path = 'etc/coreos-live-initramfs'
live_initramfs_stamp = os.path.join(livetmpd, live_initramfs_stamp_path)
os.makedirs(os.path.dirname(live_initramfs_stamp), exist_ok=True)
with open(live_initramfs_stamp, 'w') as f:
pass
run_verbose(['cpio', '-o', '-H', 'newc', '-R', 'root:root',
'--quiet', '--reproducible', '--force-local',
'-D', livetmpd, '-O', live_initramfs_cpio],
input=live_initramfs_stamp_path.encode())
run_verbose(['gzip', live_initramfs_cpio])
live_initramfs_cpio = live_initramfs_cpio + '.gz'
initramfs_cpio_ext = os.path.join(tmpdir, 'live-stamp-initramfs')
generate_initramfs_stampfile(tmpdir, initramfs_cpio_ext, 'etc/coreos-live-initramfs')
elif image_type == 'installer':
initramfs_cpio_ext = os.path.join(tmpdir, 'legacy-stamp-initramfs')
generate_initramfs_stampfile(tmpdir, initramfs_cpio_ext, 'etc/coreos-legacy-installer-initramfs')
if is_fulliso:
tmp_initramfs = os.path.join(tmpdir, 'initramfs')

Expand All @@ -186,7 +194,7 @@ def generate_iso():
with open(tmp_initramfs, 'wb') as fdst:
with open(initramfs, 'rb') as fsrc:
shutil.copyfileobj(fsrc, fdst)
with open(live_initramfs_cpio, 'rb') as fsrc:
with open(initramfs_cpio_ext, 'rb') as fsrc:
shutil.copyfileobj(fsrc, fdst)
fdst.write(bytes(initrd_ignition_padding))
os.rename(tmp_initramfs, initramfs)
Expand All @@ -211,13 +219,22 @@ def generate_iso():
with open(tmp_initramfs, 'wb') as fdst:
with open(initramfs, 'rb') as fsrc:
shutil.copyfileobj(fsrc, fdst)
with open(live_initramfs_cpio, 'rb') as fsrc:
with open(initramfs_cpio_ext, 'rb') as fsrc:
shutil.copyfileobj(fsrc, fdst)
with open(tmp_cpio + '.gz', 'rb') as fsrc:
shutil.copyfileobj(fsrc, fdst)
fdst.write(bytes(initrd_ignition_padding))
os.rename(tmp_initramfs, initramfs)
os.unlink(tmp_squashfs)
elif image_type == 'installer':
tmp_initramfs = os.path.join(tmpdir, 'initramfs')
# And this one just includes the stamp file
with open(tmp_initramfs, 'wb') as fdst:
with open(initramfs, 'rb') as fsrc:
shutil.copyfileobj(fsrc, fdst)
with open(initramfs_cpio_ext, 'rb') as fsrc:
shutil.copyfileobj(fsrc, fdst)
os.rename(tmp_initramfs, initramfs)

# Read and filter kernel arguments for substituting into ISO bootloader
result = run_verbose(['/usr/lib/coreos-assembler/gf-get-kargs',
Expand Down