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[db_migrator]Do DB migration for buffer pool size change on Mellanox …
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…platform (#833)

* do DB migration for buffer pool size change with new SDK version

* fix review comments
enhace migration fail case

* make migrator can work with warm reboot case

* ehnahce the logic to cover more corner case
simplify the way to generate new buffer configuration.

* remove code to get info from config_db.json since it's not necessary
3800 platform need special buffer configuration
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@keboliu
keboliu committed Mar 20, 2020
1 parent 9a94955 commit 07dc201
Showing 1 changed file with 115 additions and 3 deletions.
118 changes: 115 additions & 3 deletions scripts/db_migrator.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,10 @@
import argparse
import syslog
from swsssdk import ConfigDBConnector
import sonic_device_util
import os
import subprocess
import json


SYSLOG_IDENTIFIER = 'db_migrator'
Expand Down Expand Up @@ -35,7 +39,7 @@ def __init__(self, socket=None):
none-zero values.
build: sequentially increase within a minor version domain.
"""
self.CURRENT_VERSION = 'version_1_0_2'
self.CURRENT_VERSION = 'version_1_0_3'

self.TABLE_NAME = 'VERSIONS'
self.TABLE_KEY = 'DATABASE'
Expand Down Expand Up @@ -96,6 +100,100 @@ def migrate_interface_table(self):
self.configDB.set_entry(table, key[0], data[key])
if_db.append(key[0])

def mlnx_migrate_buffer_pool_size(self):
"""
On Mellanox platform the buffer pool size changed since
version with new SDK 4.3.3052, SONiC to SONiC update
from version with old SDK will be broken without migration.
This migration is specifically for Mellanox platform.
"""
# Buffer pools defined in version 1_0_2
buffer_pools = ['ingress_lossless_pool', 'egress_lossless_pool', 'ingress_lossy_pool', 'egress_lossy_pool']

# Old default buffer pool values on Mellanox platform
spc1_t0_default_value = [{'ingress_lossless_pool': '4194304'}, {'egress_lossless_pool': '16777152'}, {'ingress_lossy_pool': '7340032'}, {'egress_lossy_pool': '7340032'}]
spc1_t1_default_value = [{'ingress_lossless_pool': '2097152'}, {'egress_lossless_pool': '16777152'}, {'ingress_lossy_pool': '5242880'}, {'egress_lossy_pool': '5242880'}]
spc2_t0_default_value = [{'ingress_lossless_pool': '8224768'}, {'egress_lossless_pool': '35966016'}, {'ingress_lossy_pool': '8224768'}, {'egress_lossy_pool': '8224768'}]
spc2_t1_default_value = [{'ingress_lossless_pool': '12042240'}, {'egress_lossless_pool': '35966016'}, {'ingress_lossy_pool': '12042240'}, {'egress_lossy_pool': '12042240'}]

# New default buffer pool configuration on Mellanox platform
spc1_t0_default_config = {"ingress_lossless_pool": { "size": "5029836", "type": "ingress", "mode": "dynamic" },
"ingress_lossy_pool": { "size": "5029836", "type": "ingress", "mode": "dynamic" },
"egress_lossless_pool": { "size": "14024599", "type": "egress", "mode": "dynamic" },
"egress_lossy_pool": {"size": "5029836", "type": "egress", "mode": "dynamic" } }
spc1_t1_default_config = {"ingress_lossless_pool": { "size": "2097100", "type": "ingress", "mode": "dynamic" },
"ingress_lossy_pool": { "size": "2097100", "type": "ingress", "mode": "dynamic" },
"egress_lossless_pool": { "size": "14024599", "type": "egress", "mode": "dynamic" },
"egress_lossy_pool": {"size": "2097100", "type": "egress", "mode": "dynamic" } }
spc2_t0_default_config = {"ingress_lossless_pool": { "size": "14983147", "type": "ingress", "mode": "dynamic" },
"ingress_lossy_pool": { "size": "14983147", "type": "ingress", "mode": "dynamic" },
"egress_lossless_pool": { "size": "34340822", "type": "egress", "mode": "dynamic" },
"egress_lossy_pool": {"size": "14983147", "type": "egress", "mode": "dynamic" } }
spc2_t1_default_config = {"ingress_lossless_pool": { "size": "9158635", "type": "ingress", "mode": "dynamic" },
"ingress_lossy_pool": { "size": "9158635", "type": "ingress", "mode": "dynamic" },
"egress_lossless_pool": { "size": "34340822", "type": "egress", "mode": "dynamic" },
"egress_lossy_pool": {"size": "9158635", "type": "egress", "mode": "dynamic" } }
# 3800 platform has gearbox installed so the buffer pool size is different with other Spectrum2 platform
spc2_3800_t0_default_config = {"ingress_lossless_pool": { "size": "28196784", "type": "ingress", "mode": "dynamic" },
"ingress_lossy_pool": { "size": "28196784", "type": "ingress", "mode": "dynamic" },
"egress_lossless_pool": { "size": "34340832", "type": "egress", "mode": "dynamic" },
"egress_lossy_pool": {"size": "28196784", "type": "egress", "mode": "dynamic" } }
spc2_3800_t1_default_config = {"ingress_lossless_pool": { "size": "17891280", "type": "ingress", "mode": "dynamic" },
"ingress_lossy_pool": { "size": "17891280", "type": "ingress", "mode": "dynamic" },
"egress_lossless_pool": { "size": "34340832", "type": "egress", "mode": "dynamic" },
"egress_lossy_pool": {"size": "17891280", "type": "egress", "mode": "dynamic" } }

# Try to get related info from DB
buffer_pool_conf = {}
device_data = self.configDB.get_table('DEVICE_METADATA')
if 'localhost' in device_data.keys():
hwsku = device_data['localhost']['hwsku']
platform = device_data['localhost']['platform']
else:
log_error("Trying to get DEVICE_METADATA from DB but doesn't exist, skip migration")
return False
buffer_pool_conf = self.configDB.get_table('BUFFER_POOL')

# Get current buffer pool configuration, only migrate configuration which
# with default values, if it's not default, leave it as is.
pool_size_in_db_list = []
pools_in_db = buffer_pool_conf.keys()

# Buffer pool numbers is different with default, don't need migrate
if len(pools_in_db) != len(buffer_pools):
return True

# If some buffer pool is not default ones, don't need migrate
for buffer_pool in buffer_pools:
if buffer_pool not in pools_in_db:
return True
pool_size_in_db_list.append({buffer_pool: buffer_pool_conf[buffer_pool]['size']})

# To check if the buffer pool size is equal to old default values
new_buffer_pool_conf = None
if pool_size_in_db_list == spc1_t0_default_value:
new_buffer_pool_conf = spc1_t0_default_config
elif pool_size_in_db_list == spc1_t1_default_value:
new_buffer_pool_conf = spc1_t1_default_config
elif pool_size_in_db_list == spc2_t0_default_value:
if platform == 'x86_64-mlnx_msn3800-r0':
new_buffer_pool_conf = spc2_3800_t0_default_config
else:
new_buffer_pool_conf = spc2_t0_default_config
elif pool_size_in_db_list == spc2_t1_default_value:
if platform == 'x86_64-mlnx_msn3800-r0':
new_buffer_pool_conf = spc2_3800_t1_default_config
else:
new_buffer_pool_conf = spc2_t1_default_config
else:
# It's not using default buffer pool configuration, no migration needed.
log_info("buffer pool size is not old default value, no need to migrate")
return True
# Migrate old buffer conf to latest.
for pool in buffer_pools:
self.configDB.set_entry('BUFFER_POOL', pool, new_buffer_pool_conf[pool])
log_info("Successfully migrate mlnx buffer pool size to the latest.")
return True

def version_unknown(self):
"""
Expand Down Expand Up @@ -127,13 +225,27 @@ def version_1_0_1(self):

self.migrate_interface_table()
self.set_version('version_1_0_2')
return None
return 'version_1_0_2'

def version_1_0_2(self):
"""
Current latest version. Nothing to do here.
Version 1_0_2.
"""
log_info('Handling version_1_0_2')
# Check ASIC type, if Mellanox platform then need DB migration
version_info = sonic_device_util.get_sonic_version_info()
if version_info['asic_type'] == "mellanox":
if self.mlnx_migrate_buffer_pool_size():
self.set_version('version_1_0_3')
else:
self.set_version('version_1_0_3')
return None

def version_1_0_3(self):
"""
Current latest version. Nothing to do here.
"""
log_info('Handling version_1_0_3')

return None

Expand Down

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