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upgrade: restore original config after upgrade

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Signed-off-by: Michal Mielewczyk <michal.mielewczyk@intel.com>
This commit is contained in:
Michal Mielewczyk 2020-06-08 08:14:21 -04:00
parent f0594dce3a
commit 165fcae798
1 changed files with 44 additions and 8 deletions
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52
utils/upgrade
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@ -10,6 +10,7 @@ import argparse
import subprocess
import os
from pathlib import Path
from shutil import copy
import opencas
from upgrade_utils import (
@ -30,6 +31,7 @@ from upgrade_utils import (
LOG_FILE = "/var/log/opencas-upgrade/upgrade.log"
COMPILATION_LOG = "/var/log/opencas-upgrade/build.log"
INIT_CONFIG_FILE_TMP_PATH = "/tmp/opencas_upgrade_backup.conf"
CAS_CACHE_KEY = "CAS Cache Kernel Module"
CAS_DISK_KEY = "CAS Disk Kernel Module"
@ -76,6 +78,14 @@ class InitUpgrade(UpgradeState):
if len(active_devices["core_pool"]) != 0:
return Failure("Incomplete configuration. Run casadm -L to review CAS state!")
if os.path.isfile(opencas.cas_config.default_location):
try:
copy(opencas.cas_config.default_location, INIT_CONFIG_FILE_TMP_PATH)
except IOError:
return Failure("Could not save init config file backup")
else:
logging.info("Init config file not found")
return Success()
@ -101,6 +111,25 @@ class BuildCas(UpgradeState):
return Success()
class RestoreInitConfig(UpgradeState):
log = "Restore original init config file"
def do_work(self):
if not os.path.isfile(INIT_CONFIG_FILE_TMP_PATH):
logging.warning("Init config backup file not found")
return Success()
try:
copy(INIT_CONFIG_FILE_TMP_PATH, opencas.cas_config.default_location)
except IOError:
logging.error(f"Failed to restore original init config file from "
f"{INIT_CONFIG_FILE_TMP_PATH}. Configuration has to be restored manually.")
return Failure()
os.remove(INIT_CONFIG_FILE_TMP_PATH)
return Success()
class InstallCas(UpgradeState):
log = "Installing new Open CAS files"
@ -309,15 +338,21 @@ class UpgradeStateMachine(StateMachine):
+------+------+ fail | | |
|InsertNew +--------+ | |
+------+------+ | | |
| | | |
v v | |
+------+------+ +------+--------+ | |
|InstallCas | |InsertInstalled| | |
+------+------+ +------+--------+ | |
| | | |
v | | |
+------+------+ fail | | |
|InstallCas +--------+ | |
+------+------+ v | |
| +------+--------+ | |
| |InsertInstalled| | |
v +------+--------+ | |
+------+------+ | | |
|RestoreSched +<-------+----------+ |
|RestoreConfig+<-------+ | |
+------+------+ | |
| | |
v | |
+------+------+ | |
|RestoreSched +<------------------+ |
+------+------+ v
| +------+---+
+---------------------->+ END |
@ -335,8 +370,9 @@ class UpgradeStateMachine(StateMachine):
DropCaches: {Success: DryRun, Failure: RestoreCoreSchedulers},
DryRun: {Success: InsertNewModule, Failure: InsertInstalledModule},
InsertNewModule: {Success: InstallCas, Failure: InsertInstalledModule},
InstallCas: {Success: RestoreCoreSchedulers, Failure: InsertInstalledModule},
InsertInstalledModule: {"default": RestoreCoreSchedulers},
InstallCas: {Success: RestoreInitConfig, Failure: InsertInstalledModule},
InsertInstalledModule: {"default": RestoreInitConfig},
RestoreInitConfig: {"default": RestoreCoreSchedulers},
RestoreCoreSchedulers: {"default": None},
"default": None,
}