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Better handle cleanups and fix chroot bug

This commit is contained in:
Joshua Boniface 2022-10-05 17:21:30 -04:00
parent 4df70cf086
commit e3f96ac87e
1 changed files with 76 additions and 48 deletions
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124
api-daemon/pvcapid/vmbuilder.py
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@ -137,11 +137,11 @@ def chroot(destination):
os.fchdir(fake_root)
yield
except Exception:
pass
raise
finally:
os.fchdir(real_root)
os.chroot(".")
os.fchdir(fake_root)
os.fchdir(real_root)
os.close(fake_root)
os.close(real_root)
del fake_root
@ -554,6 +554,46 @@ def create_vm(
print("Chroot environment prepared successfully")
def general_cleanup():
print("Running upper cleanup steps")
try:
# Unmount bind-mounted devfs on the chroot
retcode, stdout, stderr = pvc_common.run_os_command(
f"umount {temp_dir}/dev"
)
# Unmount bind-mounted runfs on the chroot
retcode, stdout, stderr = pvc_common.run_os_command(
f"umount {temp_dir}/run"
)
# Unmount bind-mounted sysfs on the chroot
retcode, stdout, stderr = pvc_common.run_os_command(
f"umount {temp_dir}/sys"
)
# Unmount bind-mounted tmpfs on the chroot
retcode, stdout, stderr = pvc_common.run_os_command(
f"umount {temp_dir}/tmp"
)
# Unmount bind-mounted rootfs on the chroot
retcode, stdout, stderr = pvc_common.run_os_command(f"umount {temp_dir}")
except Exception as e:
# We don't care about fails during cleanup, log and continue
print(f"Suberror during general cleanup unmounts: {e}")
try:
# Remove the temp_dir
os.rmdir(temp_dir)
except Exception as e:
# We don't care about fails during cleanup, log and continue
print(f"Suberror during general cleanup directory removal: {e}")
try:
# Remote temporary script (don't fail if not removed)
os.remove(script_file)
except Exception as e:
# We don't care about fails during cleanup, log and continue
print(f"Suberror during general cleanup script removal: {e}")
# Phase 4 - script: setup()
# * Run pre-setup steps
self.update_state(
@ -568,8 +608,12 @@ def create_vm(
print("Running script setup() step")
with chroot(temp_dir):
vm_builder.setup()
try:
with chroot(temp_dir):
vm_builder.setup()
except Exception as e:
general_cleanup()
raise ProvisioningError(f"Error in setup(): {e}")
# Phase 5 - script: create()
# * Prepare the libvirt XML defintion for the VM
@ -586,9 +630,14 @@ def create_vm(
if define_vm:
print("Running script create() step")
with chroot(temp_dir):
vm_schema = vm_builder.create()
print("Generated VM schema:\n{}\n".format(vm_schema))
try:
with chroot(temp_dir):
vm_schema = vm_builder.create()
except Exception as e:
general_cleanup()
raise ProvisioningError(f"Error in create(): {e}")
print("Generated VM schema:\n{}\n".format(vm_schema))
print("Defining VM on cluster")
node_limit = vm_data["system_details"]["node_limit"]
@ -627,8 +676,12 @@ def create_vm(
print("Running script prepare() step")
with chroot(temp_dir):
vm_builder.prepare()
try:
with chroot(temp_dir):
vm_builder.prepare()
except Exception as e:
general_cleanup()
raise ProvisioningError(f"Error in prepare(): {e}")
# Phase 7 - script: install()
# * Run installation with arguments
@ -644,8 +697,12 @@ def create_vm(
print("Running script install() step")
with chroot(temp_dir):
vm_builder.install()
try:
with chroot(temp_dir):
vm_builder.install()
except Exception as e:
general_cleanup()
raise ProvisioningError(f"Error in install(): {e}")
# Phase 8 - script: cleanup()
# * Run cleanup steps
@ -661,8 +718,12 @@ def create_vm(
print("Running script cleanup() step")
with chroot(temp_dir):
vm_builder.cleanup()
try:
with chroot(temp_dir):
vm_builder.cleanup()
except Exception as e:
general_cleanup()
raise ProvisioningError(f"Error in cleanup(): {e}")
# Phase 9 - general cleanup
# * Clean up the chroot from earlier
@ -671,45 +732,12 @@ def create_vm(
meta={
"current": 9,
"total": 10,
"status": "Running upper cleanup steps",
"status": "Running general cleanup steps",
},
)
time.sleep(1)
print("Running upper cleanup steps")
# Remote temporary script (don't fail if not removed)
if not os.remove(script_file):
print(f"Failed to delete temporary script file '{script_file}'.")
# Unmount bind-mounted devfs on the chroot
retcode, stdout, stderr = pvc_common.run_os_command(f"umount {temp_dir}/dev")
if retcode:
raise ProvisioningError(f"Failed to unmount devfs from chroot: {stderr}")
# Unmount bind-mounted runfs on the chroot
retcode, stdout, stderr = pvc_common.run_os_command(f"umount {temp_dir}/run")
if retcode:
raise ProvisioningError(f"Failed to unmount runfs from chroot: {stderr}")
# Unmount bind-mounted sysfs on the chroot
retcode, stdout, stderr = pvc_common.run_os_command(f"umount {temp_dir}/sys")
if retcode:
raise ProvisioningError(f"Failed to unmount sysfs from chroot: {stderr}")
# Unmount bind-mounted tmpfs on the chroot
retcode, stdout, stderr = pvc_common.run_os_command(f"umount {temp_dir}/tmp")
if retcode:
raise ProvisioningError(f"Failed to unmount tmpfs from chroot: {stderr}")
# Unmount bind-mounted rootfs on the chroot
retcode, stdout, stderr = pvc_common.run_os_command(f"umount {temp_dir}")
if retcode:
raise ProvisioningError(f"Failed to unmount rootfs from chroot: {stderr}")
# Remove the temp_dir
if not os.rmdir(temp_dir):
print(f"Failed to delete temporary chroot directory '{temp_dir}'.")
general_cleanup()
# Phase 10 - startup
# * Start the VM in the PVC cluster