OpenStack版本升级之Swift

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Swift升级的一般流程
　　Swift升级的一般流程见参考文档，摘抄如下：

As always, a production Swift cluster can be upgraded live, with no downtime for clients. The normal upgrade path is:
Stop the background processes
Upgrade the packages
Reload the processes (eg swift-init object reload)
Start the background processes
A normal upgrade process will upgrade one storage server in one zone (a "canary node") to check if any unforseen issue arise.
After than node is upgraded, upgrade the other storage nodes in that zone. Next, upgrade each of the remaining zones in turn.
Finally, upgrade each of your proxy servers (one at time).

F版对依赖库的变化
　　F版对依赖库的变化主要是添加了一个新的依赖python-swiftclient，另外放宽Webob的版本要求为>=1.0.8,<1.3，详情如下：

[ugyn@localhost swift]$ git diff origin/stable/essex:tools/pip-requires origin/stable/folsom:tools/pip-requires > diff
[ugyn@localhost swift]$ cat diff
diff --git a/origin/stable/essex:tools/pip-requires b/origin/stable/folsom:tools/pip-requires
index f9ea5f2..28bc426 100644
--- a/origin/stable/essex:tools/pip-requires
+++ b/origin/stable/folsom:tools/pip-requires
@@ -1,4 +1,4 @@
-WebOb==1.0.8
+WebOb>=1.0.8,<1.3
configobj==4.7.1
eventlet==0.9.15
greenlet==0.3.1
@@ -6,3 +6,6 @@ netifaces==0.6
pastedeploy==1.3.3
simplejson==2.0.9
xattr==0.4
+
+# Install python-swiftclient from git
+https://github.com/openstack/python-swiftclient/zipball/master#egg=python-swiftclient

升级存储节点
　　停止现有服务，并备份配置文件

[iyunv@store1 update_swift]# ../swift-helper stop
Signal object-server  pid: 4016  signal: 15
object-server (4016) appears to have stopped
Signal object-replicator  pid: 4032  signal: 15
object-replicator (4032) appears to have stopped
Signal object-updater  pid: 4059  signal: 15
object-updater (4059) appears to have stopped
Signal object-auditor  pid: 4068  signal: 15
object-auditor (4068) appears to have stopped
Signal container-server  pid: 4090  signal: 15
container-server (4090) appears to have stopped
Signal container-replicator  pid: 4109  signal: 15
container-replicator (4109) appears to have stopped
Signal container-updater  pid: 4115  signal: 15
container-updater (4115) appears to have stopped
Signal container-auditor  pid: 4123  signal: 15
container-auditor (4123) appears to have stopped
Signal account-server  pid: 4129  signal: 15
account-server (4129) appears to have stopped
Signal account-replicator  pid: 4137  signal: 15
account-replicator (4137) appears to have stopped
Signal account-auditor  pid: 4143  signal: 15
account-auditor (4143) appears to have stopped
[iyunv@store1 update_swift]# cp -R /etc/swift ./
　　下载并安装相关软件

[iyunv@store1 update_swift]# pip install -d ./ --no-install python-swiftclient
Downloading/unpacking python-swiftclient
Downloading python-swiftclient-1.2.0.tar.gz (46Kb): 46Kb downloaded
Saved ./python-swiftclient-1.2.0.tar.gz
Running setup.py egg_info for package python-swiftclient
Downloading/unpacking simplejson (from python-swiftclient)
Downloading simplejson-2.6.2.tar.gz (53Kb): 53Kb downloaded
Saved ./simplejson-2.6.2.tar.gz
Running setup.py egg_info for package simplejson
Successfully downloaded python-swiftclient simplejson
Cleaning up...
[iyunv@store1 update_swift]# pip install --upgrade simplejson-2.6.2.tar.gz python-swiftclient-1.2.0.tar.gz
[iyunv@store1 update_swift]# wget https://github.com/openstack/swift/archive/stable/folsom.zip
[iyunv@store1 update_swift]# unzip folsom
[iyunv@store1 update_swift]# cd swift-stable-folsom/
[iyunv@store1 swift-stable-folsom]# python setup.py install

　　修改配置文件，我的最终的配置文件如下，这里要注意的是前两个配置文件中的db_preallocation项，对于采用SSD盘的应当采用默认的关闭，对于一般的硬盘应当打开，相关说明见这里

[iyunv@store1 etc]# cat account-server.conf
[DEFAULT]
workers = 2
db_preallocation = on
[pipeline:main]
pipeline = recon account-server
[app:account-server]
use = egg:swift#account
[filter:recon]
use = egg:swift#recon
[account-replicator]
[account-auditor]
[account-reaper]
[iyunv@store1 etc]# cat container-server.conf
[DEFAULT]
workers = 4
db_preallocation = on
[pipeline:main]
pipeline = recon container-server
[app:container-server]
use = egg:swift#container
[filter:recon]
use = egg:swift#recon
[container-replicator]
[container-updater]
[container-auditor]
[container-sync]
[iyunv@store1 etc]# cat object-server.conf
[DEFAULT]
workers = 8
[pipeline:main]
pipeline = recon object-server
[app:object-server]
use = egg:swift#object
[filter:recon]
use = egg:swift#recon
[object-replicator]
[object-updater]
[object-auditor]

　　创建缓存目录

[iyunv@store1 etc]# mkdir /var/cache/swift
[iyunv@store1 etc]# chown swift:swift /var/cache/swift
　　启动相关服务

[iyunv@store1 etc]# swift-init object container account reload
No container-server running
Starting container-server...(/etc/swift/container-server.conf)
No account-server running
Starting account-server...(/etc/swift/account-server.conf)
No object-server running
Starting object-server...(/etc/swift/object-server.conf)
[iyunv@store1 ~]# ./swift-helper restart
Signal object-server  pid: 7320  signal: 15
object-server (7320) appears to have stopped
Starting object-server...(/etc/swift/object-server.conf)
No object-replicator running
Starting object-replicator...(/etc/swift/object-server.conf)
No object-updater running
Starting object-updater...(/etc/swift/object-server.conf)
No object-auditor running
Starting object-auditor...(/etc/swift/object-server.conf)
Signal container-server  pid: 7305  signal: 15
container-server (7305) appears to have stopped
Starting container-server...(/etc/swift/container-server.conf)
No container-replicator running
Starting container-replicator...(/etc/swift/container-server.conf)
No container-updater running
Starting container-updater...(/etc/swift/container-server.conf)
No container-auditor running
Starting container-auditor...(/etc/swift/container-server.conf)
Signal account-server  pid: 7312  signal: 15
account-server (7312) appears to have stopped
Starting account-server...(/etc/swift/account-server.conf)
No account-replicator running
Starting account-replicator...(/etc/swift/account-server.conf)
No account-auditor running
Starting account-auditor...(/etc/swift/account-server.conf)

　　升级完成一个存储节点后再按照升级流程依次完成其它存储节点的升级。

升级代理节点
　　升级代理节点基本同上面存储节点的升级，停止代理服务，安装相关软件，修改代理服务配置文件，启动代理服务。升级的时候需要注意几点，一是swift3已经从swift项目里移出了，有需要的话得另外安装（详情）。二是F版可以使用新的或旧的rings而E版只可以使用旧的rings，如果要考虑降级的话先不要更新rings（详情）。三是缓存的平滑过度问题（详情）。最后贴一下我修改后的配置：

[iyunv@stackcc ~]# cat /etc/swift/proxy-server.conf
[DEFAULT]
bind_port = 8888
[pipeline:main]
pipeline = catch_errors healthcheck cache ratelimit formpost tempurl authtoken keystoneauth staticweb proxy-logging name_check proxy-server
[app:proxy-server]
use = egg:swift#proxy
account_autocreate = true
[filter:authtoken]
paste.filter_factory = keystone.middleware.auth_token:filter_factory
auth_host = localhost
auth_port = 35357
auth_protocol = http
auth_uri = http://localhost:5000/
admin_tenant_name = service
admin_user = swift
admin_password = service123
delay_auth_decision = 1
signing_dir = /etc/swift
[filter:keystoneauth]
use = egg:swift#keystoneauth
operator_roles = admin, swiftoperator
[filter:healthcheck]
use = egg:swift#healthcheck
[filter:cache]
use = egg:swift#memcache
[filter:ratelimit]
use = egg:swift#ratelimit
[filter:catch_errors]
use = egg:swift#catch_errors
[filter:staticweb]
use = egg:swift#staticweb
[filter:tempurl]
use = egg:swift#tempurl
[filter:formpost]
use = egg:swift#formpost
[filter:name_check]
use = egg:swift#name_check
[filter:proxy-logging]
use = egg:swift#proxy_logging

　　北方工业大学 |
云计算研究中心 | 姜永