Author Archives: Wu

About Wu

VCP, MCSE, CCNA

Maximum Supported Boot Devices in Virtual Machine BIOS

Noticed a interesting limitation on VMware virtual machines. If you configure multiple SCSI controllers and distribute more than  8 virtual  disks. You may experience randomly OS boot up failure when power cycle VMs. Only last 8 disks with higher SCSI ID present in boot order settings of BIOS. You cannot choose the disks with lower SCSI ID.

You need to following up VMware KB “Changing the boot order of a virtual machine using vmx options (2011654)” to force virtual machines boot up on proper SCSI node.

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Automatic vSphere Capacity Report in PPT

Reporting is important to management. To be a IT Pro, you may need to run regular reports for management. Some reports may be generated time consume. vRealize Operations Manager is an alternative to create customized reports. It’s a powerful product to organize data and create PDF or CSV files on scheduled intervals. I recommend have a look if you have planned to implement performance, capacity and alarm system for virtual environment.

What if budget is constrained? Is there a way to create such kind of reports? The answer is “Yes”. I worked out an automatic workflow to create the reports. I will not provide step-by-step guide in this post since it’s advanced integration of multiple products, everyone may have different way to do that. You can even create everything by script if you have strong programming skill. I’m not, I only look for the easiest way to achieve the goal.

Here is a scenario for  example: I want to run a monthly report for vSphere CPU and memory count and present to management by PowerPoint. I want to show management the historical trend of CPU and memory data. The traditional way is collect data in vCenter, organize and create charts in PowerPoint slides. So the whole workflow is: vCenter -> PowerPoint

If you want to automate the whole process you need to introduce few things more: PowerCLI, CSV and Excel. You need to develop a PowerCLI script to grab CPU and memory data on vCenter Server, then export the data to a CSV table by PowerShell command export-csv. Then import the table to an Excel file by Office feature Query Data. It loads the CSV table dynamically, you can even specific what data can be queried by filter.

Once the table is present in Excel, you need to create a chart accordingly. It’s trick when you paste the chart to PowerPoint Slide. You need to use Paste Special to paste the chart as Microsoft Excel Chart Object. The pasted chart can be updated automatically when you open the PowerPoint file.

The last step is created a scheduled task to run the PowerCLI script. Make sure you read my blog Extremely slow when run PowerShell script by scheduled tasks before create the task.

You can also configure the Excel file to automatically update table by CSV file.

Cannot Launch Patch Installer on Windows Server 2016

I was trying to update one Windows Server 2016 by standalone patch file. Somehow nothing happened after I double click the installer file. That’s because Windows Server 2016 prevent execute the  file due to it’s download from internet.

The quick fix is right click the file – Properties – Check Unblock – Click OK button.

Further more. The file has ADS (alternate data streams) attached. The ADS marked the file as download from internet.

You can run following two PowerShell commands to figure out object and value of the ADS.

PS C:\> Get-Item test file.msu -Stream *
PSPath : Microsoft.PowerShell.Core\FileSystem::C:\Users\wzheng110917a\Dow
 $DATA
PSParentPath : Microsoft.PowerShell.Core\FileSystem::C:\Users\wzheng110917a\Dow
PSChildName : 20171011_KB4038801_Updates.msu::$DATA
PSDrive : C
PSProvider : Microsoft.PowerShell.Core\FileSystem
PSIsContainer : False
FileName : C:\Users\wzheng110917a\Downloads\20171011_KB4038801_Updates.msu
Stream : :$DATA
Length : 1241376269

PSPath : Microsoft.PowerShell.Core\FileSystem::C:\Users\wzheng110917a\Dow
 one.Identifier
PSParentPath : Microsoft.PowerShell.Core\FileSystem::C:\Users\wzheng110917a\Dow
PSChildName : 20171011_KB4038801_Updates.msu:Zone.Identifier
PSDrive : C
PSProvider : Microsoft.PowerShell.Core\FileSystem
PSIsContainer : False
FileName : C:\Users\wzheng110917a\Downloads\20171011_KB4038801_Updates.msu
Stream : Zone.Identifier
Length : 26

 

PS C:\> Get-Content testfile.msu -Stream Zone.Identifier
[ZoneTransfer]
ZoneId=3

You can  see the ZoneId is 3. Following is a table to show which type of file it is.

0     My Computer 
1     Local Intranet Zone 
2     Trusted sites Zone 
3     Internet Zone 
4     Restricted Sites Zone

For more reference please read Microsoft blog “Alternate Data Streams in NTFS“.

You can use Unblock-File if you want to unblock multiple files.

 

博客是记录思想的地方

科技的发展真是非常快,十年前我还在用Windows Server 2003 和 Windows XP。十年后的今天,我们已经初尝到人工智能的味道。有那么多的Apps、网站、技术帮助我们更快速的学习新知识,人们的生活节奏越来越快,甚至学习这个人类的基本技能也在传统方式上增加了“碎片时间”方式(一个被“逻辑思维”所倡导的,2017年很流行的学习新方式)。

各种高科技的今天,我们可以用智能手机记录生活中的点点滴滴,甚至影像资料。但是“思想”,这个人类智力的核心却是无法记录的,唯文字可以反映作者当时的状态、情绪和记忆。在快节奏的城市生活中,我们有时候是需要慢下来、停下来的。回头看看自己的过去,读读当时的思想,回忆回忆曾经的记忆。很久前网络上开始流行一句话,大意是“别走得太快,等一等灵魂”(可能是假的名人名言)。我想也许文字可以做到这点。

这个国庆假期,利用空闲时间在网络上搜索搭建SS服务器的资料,无意间看到逗比根据地上的一篇文章介绍一个给互联网上所有网站做历史快照的网站,就随手搜了搜我的过去,竟然无意间发现了自己十几年前写的博客。这些文章早已被我遗留在互联网的某个角落,忘记了。看起来那应该是我从MSN Live空间搬过去的,还依稀记得2000年那会儿博客非常火爆,互联网企业都在推各自的免费博客服务,微软也不例外,但是后来好像因为这种服务不赚钱,以及监管原因,大量的博客服务开始关停,微软也不例外。幸好我当时把文章都转移了,今天才有机会帮我回忆起当时的状态。

非常高兴我可以重读当年的心力路程,让我再次如身临其境般的回到那个时代、回到那个状态。我会尝试花一些时间记录生活,给我的未来留下些参考。

Memory Errors on Modern Servers

I used to see memory degrading on  Cisco  UCS blades. But less see on HPE blades. I thought it maybe quality control problem of Cisco manufacture. Today I read two articles in Cisco website, it explains why we see memory degrading and how it works. I attached the articles below.

Managing Correctable Memory Errors on Cisco UCS Servers

UCS Enhanced Memory Error Management

The conduction in the whitepaper is not only specific for Cisco UCS, but also for any modern servers. Following is summary of why memory errors rates is going high nowadays.

  • Larger memory systems contain more bits
  • Higher capacity DRAM chips require smaller bit cells which result in fewer stored charges per bit
  • Lower operating voltages can lead to reduced noise margin
  • Higher operating speeds can lead to reduced timing margin

Oracle Utilizes 50% of Physical Processors on HPE Server

DBA team told me Oracle was running slow on a HPE server. I observed the CPU utilization was about 50% of overall capacity. Whenever Oracle database bumps up the system experienced slowness.

Further  digged into the issue, I see Oracle workload only ran on single physical processor, but the server has two processors. And the  Windows 2012 R2 resource manager show the system used Processor Group, the two physical processors were grouped out. This technology is described in Microsoft MSDN article.

To fix the issue you have to change value of “NUMA Group Size Optimization” to “Flat” in BIOS. Please refer to HPE article for detail  steps.

Detail of HPE server behavior  is documented here. Please note, the article says it impacts to ProLiant Gen9 and Intel E5-26xx v3 processors. But it actually also impacts to Intel E5-26xx v4 and Synergy blades.

虚拟主机无法获得DHCP IP地址

刚解决了一个问题,快速更新一下。当虚拟主机无法获得DHCP IP地址时,应该做的第一件事情是检查防火墙,无论是Windows防火墙或者物理防火墙。UDP端口67和68不能被阻挡掉。否则会出现虚拟主机只能获得169.x.x.x的IP地址,这个地址是不可用的,表示虚拟主机无法从DHCP服务器获得地址。

这两个端口是DHCP客户端用来从DHCP服务器获取IP地址的。具体的技术细节可以参考RFC文档

DHCP uses UDP as its transport protocol. DHCP messages from a client

to a server are sent to the ‘DHCP server’ port (67), and DHCP

messages from a server to a client are sent to the ‘DHCP client’ port

(68). A server with multiple network address (e.g., a multi-homed

host) MAY use any of its network addresses in outgoing DHCP messages.

我在排错过程中也用到了这篇文章。

搜索虚拟主机时提示:Login To The Query Service Failed

使用vSphere Client登录vCenter Server 6.0时可能会出现如下报错信息:

Login to the query service failed.

The server could not interpret the communication from the client. (The remote server returned an error: (500) Internal Server Error.)

这是因为在登录vSphere Client时勾选了”Use Windows session credentials“。试试取消它。

相关知识库链接:Searching the Inventory with the vSphere Client fails (2143566)

Login To The Query Service Failed When Search Virtual Machine

You may see following problem if you login vCenter  Server 6.0 by vSphere Client:

Login to the query service failed.

The server could not interpret the communication from the client. (The remote server returned an error: (500) Internal Server Error.)

That’s because “Use Windows session credentials” checkbox is selected. Deselect it and give it a try.

Refer KB Searching the Inventory with the vSphere Client fails (2143566)

Virtual Machine Cannot Get DHCP IP Address

Just a quick post. When virtual machine cannot get DHCP IP address the first thing you want to check is firewall. Whatever Windows firewall or physical firewall. You should make sure UDP port 67 and 68 are not blocked. Otherwise you  will see the virtual machine gets 169.x.x.x IP address only.

The two  ports is required for DHCP client to query IP addresses. The methodology is introduced in RFC document.

DHCP uses UDP as its transport protocol. DHCP messages from a client
to a server are sent to the ‘DHCP server’ port (67), and DHCP
messages from a server to a client are sent to the ‘DHCP client’ port
(68). A server with multiple network address (e.g., a multi-homed
host) MAY use any of its network addresses in outgoing DHCP messages.

I also got some ideas in this post.

Adobe Flash Player Out of Date on vSphere Web Client

You may see ‘Adobe Flash Player Out of Date’ on Chrome when you open vSphere Web Client. Click the text Chrome will update Flash Player automatically. But in some cases it doesn’t work due to maybe your Chrome is controlled by company policy or internet problem to Adobe.com. I found an article to show how to offline fix the issue. You can download Flash Player for Opera and Chromium-based browsers – PPAPI in official Adobe KB article.

You may also want to check out my other articles about Flash issue on browsers.

Flash menu appears when right click on vSphere Web Client in Chrome

Cannot open vSphere Web Client on IE11 on Windows 8.1

Network Latency on Virtual Machine

Slight network latency may cause application problem  on sensitive virtual machines. Even the network responding time is just 3 or 7 ms. There is a way to improve the  stability of responding latency – Enable RSS on NIC.

Network traffic is handled by single CPU core when RSS is disabled. Enable it will distribute the workload to 4 cores by default. You can increase CPU for RSS by change registry.

To summarize the solution. Go to Device Manager -> NIC properties -> Advance -> Find RSS option  and enable it. You will see 2 – 3 network drops when applying it.

You can refer following articles for detail.

Poor network performance or high network latency on Windows virtual machines

Virtual Receive-side Scaling in Windows Server 2012 R2

Regarding increase CPU for RSS. Read following article to learn how to modify it.

Setting the Number of RSS Processors

vRealize Operation Manager Installation Pending on install.sh

If your company implemented firewall and blocked public NTP server, you may see installation of vRealize Operation Manager pending on ./install.sh on console. That’s because the installer tries to negotiate with NTP server http://www.iana.org. The firewall blocked the traffic.

VMware TAM Manager Shan told me  there are two options on firewall to block traffic: REJECT and DROP. REJECT means firewall responding to the request and let source device knows it’s rejected. DROP means firewall immediately ignores the request and no responding to source device. Looks like there is a bug in vROPs code that it hung if NTP request gets drop and no responding.

The workaround is create a port group without physical uplinks and install vRealize Operation  Manager. Then move it to proper network after installation  is completed. You can configure correct IP addresses when import the OVF file so later on you just need simply move the network.

Flash menu appears when right click on vSphere Web Client in Chrome

There is a KB describes how to fix right click issue in IE on vSphere Web Client. But my problem was in Chrome. I searched a lot in internet but no lucky till today.

The problem was flash menu appears when I right click anything in vSphere Web Client in Chrome. I have two computers that both has Chrome installed but one has issue, other one works fine. I compared version of Chrome, noticed working one was 55.x, problematic one was 49.x. The issue gone after upgraded to 57.x.

After dig into that problem, looks like Google fixed the problem on version 54.0.2840 that there was a bug related to right click. Check out release notes here.

 

My New Toy Raspberry Pi 3

I own Raspberry Pi 1 and 2 both. I used to do some small projects and learn Python on its. It’s great computer to learn scripting and Linux. But not something can be used in daily based.

I was excited when I hear Raspberry Pi foundation released Pi 3. Thanks foundation brought our world a powerful, cheap and flexible computer that can replace my laptop. In general, I think Pi 3 can be used for daily work in GUI interface. It comes with embedded WiFi, Bluetooth and quad-core 1.2GHz CPU! It frees up the 4 USB ports so I can use it for other purpose.

I have a laptop that motherboard was dead, screen still works. So I bought driver board for the LED screen. Connected Pi 3 to the driver board by HDMI cable. The official Pi 2 case is compatible with Pi 3 except power LED in the other side. I use the latest OS “RASPBIAN JESSIE WITH PIXEL“. I have to say the graphical interface is awesome! It’s more like a modern, real computer. I use default browser Chromium which is similar with Chrome PC version. I also installed “Google Input Tool” extension on Chromium so I can input Chinese. Since most of my work on websites so I don’t have to install input tool on OS. And I saw some interface problem when use Chinese input tool for Linux. I also tried bluetooth headset, not working well. So I turned to USB headset, it works perfectly.

I opened 10 more tabs in Chromium just like how do I use my PC. I also ran a online website to streaming music to USB headset. Wrote blog, brows photos, edit files…etc. I didn’t see any performance issue so far. I guess my high performance TF card may helped. I bought Samsung 64GB UHS-1 Class10 for my Pi 3.

 

vSphere Data Protection将停止更新

VDP在未来的vSphere版本中将不再继续更新。在2022年以前对于现有的VDP客户没有影响。如果客户想迁移到其他备份方案,VMware提供限定时间内的免费迁移至Dell EMC Avamar Virtual Edition的促销。客户依旧可以通过vCenter的存储API把第三方备份解决方案和vCenter整合。

详细资料请参阅问答文件。另外VMware产品生命周期矩阵供你参考。

vSphere Data Protection End of Availability

Just a quick update that VDP will discontinued in future release of vSphere. It doesn`t impact to existing customers till 2022. VMware offers free migration to Dell EMC Avamar Virtual Edition in limited time if customers want to move to other backup solution. Customers can also use other 3rd party backup solutions to integrate with vCenter Server via storage API.

Read this FAQ for detail. VMware products lifecycle matrix for your reference.

“No host data available” Reported in Hardware Status Tab

Just noticed a issue that nothing reported in ‘Hardware Status‘ tab of ESXi hosts in vSphere Web Client. KB 2112847 gives a solution but not works for me. The feature can be used to monitor hardware failures. I figured out a way to workaround it. You just need to login by Administrator account and click ‘Update‘ button under ‘Monitor‘ – ‘Hardware Status‘ for each ESXi host. You will get the status after few minutes.

微信公众平台是否适合数据中心领域的纯技术文章?

最近迷恋于罗胖的“得到App“订阅专栏和其中的各种有声图书,罗胖说他的公司要做信息提供商,又说在信息大爆炸的时代一个有价值的服务就是帮人甄选好信息。这让我思考一个问题:微信公众平台究竟是否适合数据中心领域的纯技术文章?

我觉得要先定义什么是“纯技术文章”。我的理解是细致的讲解操作过程、实现原理以至于这篇文章可以当作操作步骤在实际工作中使用的文章。这也是我写这篇文章的前提限定条件。我的思考如下:

首先数据中心领域的纯技术的文章有时需要用较复杂的形式和较长的篇幅来表达,微信公众平台暂时还不具备这个功能,这个可以比较一下微信公众平台和WordPress的文章编辑器功能。

其次从用户的角度来考虑,当一个供职于数据中心的IT Pros遇到问题时,第一时间应该会想到的是搜索引擎,而不是相对封闭、搜索能力较差的微信公众平台。我一直认为微信是在中国特色信息化政策下的特定产物,信息在流动,但又相对于其他社交产品更加孤岛化。

再者从实用性来看,微信生来就带着移动互联网特性,甚至PC端也是很久以后才有的。而数据中心的IT Pros在工作中还是用PC多过用移动终端的,日常业务中的复制粘贴可能用的很多,微信在这方面总感觉弱一些。

最后从目标用户来看,个人理解是一个重社交的平台,聚集的人群并不是大量的专业用户。而IT专业用户可能也没多少时间看微信、朋友圈、订阅号等。而作为一个公众号能提供的大量纯技术领域专业文章一定是单一方面的,对于普通订阅者来说,很容易产生倦怠。

基于以上这几个思考,我认为这个平台暂时还是不适合作为IT Pro的专业文章发布平台,倒是更适合比较泛泛的介绍功能、原理、架构、思路等的文章。你觉得呢?

Host Cannot Download Files From VMware vSphere Update Manager Patch Store

You may see following error when you scanning ESXi hosts by vCenter Update Manager.

Host cannot download files from VMware vSphere Update Manager patch store. Check the network connectivity and 
firewall setup, and check esxupdate logs for details.

You also see similar logs in /var/log/esxupdate.log.

[Errno -2] Name or service not known

The root cause could be following:

  1. ESXi host cannot resolve DNS name of vCenter Update Manager Server.
  2. One of the DNS servers incorrect if you set multiple DNS servers on ESXi host.

Migrate vCenter Server 5.5 Windows to 6.0 Virtual Appliance 

Virtual appliance is future of how VMware delivery their product to customers. It’s pain to migrate from vCenter Server Windows version to virtual appliance. The only way was build up new virtual appliance and move everything out of Windows vCenter Server. The challenge is you lost data if you have integrated vCenter Server with other VMware products, or using DVS.

VMware released vCenter Server Migration Tool after VMworld 2016. It gave me confidence to give it a try. I assume vCenter Server is embedded SSO. I did the migration 2 or 3 times, following is summary of my experience. The migration tool only support migrate vCenter Server 5.5 windows edition to vCenter Server 6.0 U2.

Prerequisites

  1. vCenter Server is more like core services today since lot of 3rd party software call vCenter API to interactive with VMs. You may have some products integrated with vCenter Server already. Please upgrade to vCenter 6 compatible version before migration.
  2. I suggest create a local account on source vCenter Server if your server is domain member. You can login back source vCenter by local account in case migration failed.
  3. vCenter Server Migration Tool applies temporary IP address on destination vCenter virtual appliance during migration. It’s used to communicate with source vCenter. Please register a temporary IP address for destination vCenter Server.
  4. A helper VM is required to run migration image. Please make sure you have a free Windows VM be ready to mount migration image.
  5. SQL database is exported to source vCenter Server if you want migrate performance and event data. So you need to make sure enough space on C: drive on source vCenter. The free space should be much bigger than vCenter database size.
  6. Of course you need a vCenter Server 6 license key since old key doesn’t support the version.
  7. Some cases show migration process stopped during export SQL database. That’s because memory of source vCenter is too small. Please make sure RAM of source vCenter should be equal or greater than destination vCenter Server.
  8. The other tricky is database table. You may see migration processes is completed but destination vCenter Server doesn’t come up, and no data actually imported. That’s because ‘checksum‘ column existing in table [dbo].[VMO_ResourceElementContent] in vCenter DB. You can run following SQL query to remove it before migration.
    alter table dbo.VMO_ResourceElementContent drop column checksum;

Procedure

The items above can be done anytime before the migration window. Following steps should be token during migration.

  1. You need to disable firewall and anti-virus software on old vCenter to avoid communication issue between Migration Assistant and new vCenter Server.
  2. To avoid any unstable, resource contention, or potential network connectivity lost issue, I suggest temporarily disable DRS and HA on source and destination cluster if they are virtual machine.
  3. Copy Migration Assistant from migration image to old vCenter.
  4. Take snapshot on old vCenter and backup database of old vCenter.
  5. Connect to console of source vCenter and run Migration Assistant.
  6. Mount vCenter Server 6 U2m image on helper VM. Launch vCenter migration. The migration process is straightforward. I wouldn’t introduce more here.

After Migration

Basically you need to revert all the temporary changes made before. Such as delete snapshot and DB backup, enable DRS and HA, and disable vNIC on source vCenter Server to avoid any human error.

How to Integrate PowerCLI 6.5 with PowerShell and PowerShell ISE

I wrote an article to introducing how to integrate PowerCLI with PowerShell and PowerShell ISE. VMware just released PowerCLI 6.5 R1, it includes lot  of new features and modules. And somehow my way doesn’t work. Following is new way to integrate PowerCLI 6.5 with PowerShell and PowerShell ISE in Windows 10.

PowerShell and PowerShell ISE both have it own $profile. So we need to do two times.

Before we start

Please make sure your PowerShell execution policy is not restricted. You can get the setting by run  following command:

Get-ExecutionPolicy

PowerShell Integration

  1. Open PowerShell window. Run following command to confirm profile file is not existing.
    Test-Path $profile

    If return is ‘False’, go to step 2.
    If return is ‘True’, Backup the file and go to step 3.

  2. Run following command if the  profile file  doesn’t existing.
    New-Item -Path $profile -type file -force | Out-Null
    
    Test-Path $profile

    The return above should be ‘True’. Profile file is created.

  3. Run following command to include VMware PowerCLI modules in  PowerShell.
    Add-Content -Path $profile -value "# Load Windows PowerShell cmdlets for managing vSphere `r`n. 'C:\Program Files (x86)\VMware\Infrastructure\PowerCLI\Scripts\Initialize-PowerCLIEnvironment.ps1'"

    The blue text above maybe different in your environment base upon where your PowerCLI is installed.

PowerShell ISE Integration

PowerShell ISE process is same to PowerShell, only different is all the operation should be completed in PowerShell ISE window.

Reboot is not required in my environment. But anyhow please reboot if you see any issue.

The processes above integrate PowerCLI 6.5 with PowerCLI and PowerCLI ISE for  current user only. If you want to integrate for all users on the machine, you need to refer to this article.

VMworld 2016

本年度VMworld重回拉斯维加斯,相比旧金山各方面都要好很多,参会这几天有不少乐趣。技术层面,本年度vmworld主要聚焦于用户端统一管理、公有云、以及vmware自家的“超融合软件”。
第一天的主题演讲回顾了近十几年来传统IT、私有云、公有云的增长趋势,这里有个很有意思的地方。我一直以为IT的转变方式应该是从传统到私有,最终到公有的。但是从演讲看,私有云和公有云占有率同时保持增长,公有云甚至一直比私有云要高一些。但直到今年云的占有率依旧不敌传统IT架构,这还是在国际大公司接近80%虚拟化的现状下。演讲中还提出了一个观点——数字化商业。今天,企业都在追求创新、高效的商业,IT已经不像过去仅仅支持企业内部的信息系统,而是引导企业走向何方,IT更加紧密的和商业结合在一起,很难想象一家没有技术驱动的企业可以高效的与客户沟通和分析数据、快速的对市场做出反应、自动化的生产经营。第二天的主题演讲介绍了一些用户层面的新解决方案,由于本人不关注该层面,没有太多了解。

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Virtual Machine Console in vCenter is Opened by VMware Workstation

If you have VMware Workstation and VMware Remote Console both installed on Windows 10 you may see vCenter virtual machine console in vSphere Web Client is opened by VMware Workstation instead of VMware Remote  Console. If you see same case your VMware Remote Console may be hijacked. I call it “hijack” since there is no easy way to revert it back.

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VMware Workstation自动打开vCenter虚拟机的控制台

如果你的Windows 10电脑上装了VMware Workstation和VMware Remote Console,当你在vSphere Web Client里打开运行在vCenter上的虚拟机控制台时,VMware Workstation可能会代替VMware Remote Console自动连接到控制台。恭喜!你的VMware Remote Console被劫持了。这个问题解决起来比较复杂所以我叫它“劫持”。

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2016年三亚亲子度假

2014年在泰国度假后,我们有了小宝宝Vinny,过去两年里老婆和我都忙于照顾小家伙,没有太多时间考虑外出。眼看着Vinny从刚出生时的弱不经风到今天一岁三个月的活泼好动,是时候尝试带Vinny看看世界了。正好我和老婆都有假期,于是计划了这趟旅行。

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整合PowerCLI与PowerShell

早先我有写一篇文章关于如何手工整合PowerCLI和PowerShell。最近重装了系统,不得不再做一次。以前我习惯用PowerGUI写脚本,但不知道怎么搞的PowerGUI总是丢失菜单界面,这困扰了我很久一直没办法完全解决,所以这次我在想能不能把PowerCLI和PowerShell整合了一劳永逸,毕竟内置的好用一些啊。

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Add Language Switcher in Posts Page Automatically by WordPress plugin Polylang

If you are multi-language IT Pro you may want to show articles in multiple languages just like me. I use Polylang in my blog to switch English and Chinese version. I used to add “Language Switcher” tag in my articles. It’s manual process that I had to remember the tag in somewhere, copy and past it to articles when I was writing. It’s frustration to repeat it in every article. Another problem was I have to add “Read More” tag in each article before I add “Language Switcher” tag. That’s because each post shows a switcher in home page if I don’t do that. It confuses Polylang which URL each article should goes. I want to find a perfect way to fix this problem! Here we go…

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用WordPress插件Polylang实现在博客文章页面自动显示语言切换开关

也许你和我这种挨踢砖家一样奇葩,用多种语言写博客。我的WordPress使用Polylang显示文章的中英文版本。一般我需要在文章里加一个”Language Switcher”标签来显示语言切换。添加这个标签不是那么容易,我得把它记在某个地方,需要的时候复制、粘贴到文章里。在每篇文章里添加这个标记有点儿麻烦。另外,这个标记必须配合”Read More”标记之后使用,如果语言切换标记出现在”Read More”之前会导致首页上出现多个语言切换标记,每个语言切换标记无法知道每篇文章对应的URL是多少。看看我是如何完美解决这个问题的吧…

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在vROps中报表n天以前创建的快照

有很多种方法可以用来做虚拟机快照报表。比如PowerCLI、VRTools、甚至vSphere Client本身也可以。今天我会分享如何使用vRealize Operations Manager (vROps) 6.x做自定义天数以前创建的虚拟机快照的报表。用vROps做表表的好处是可以通过计划任务自动以邮件形式发送报表,并提供PDF和CSV两种格式的表。 我在网上找到了一篇文章谈到如何用vROps实现类似报表。但要求修改vROps的规则,这可能会影响到vROps的全局计算模型。如果你的团队们需要为各自的报表设置不同的条件怎么办?

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Report snapshots older than X days in vROps

There are several ways to reporting snapshots. You can use PowerCLI, VRTools, or even vSphere Client itself. Today I will show you how to reporting by vRealize Operations Manager (vROps) 6.x. The benefit of  vROps reports is you can schedule it by sending email with PDF & CSV reports. I found a post discuss how to reports by vROps. But it requests modify policy, it may impacts global calculation. What if your teams request different criteria for reports?

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Power Raspberry Pi by Portable Chargers

I want to try make a remote control car by Raspberry Pi. The first question is how to power a portable Raspberry Pi? There are lot of solutions in internet. I want to find a simple, cheap and long battery life solution. Some articles introduced power bank but it overs $100 and only provides 5v output. I need some thing can provide not only 5v power for Raspberry Pi, but also more than 7v for L298N.

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用移动电源支持树莓派

一直想要用树莓派做个遥控小车,最先碰到的问题是如何给移动的树莓派供电?网上有很多方案,想找一个简单、便宜、可以长时间供电的解决方案。有文章介绍用移动电源,但是价格都高于100美元并且只提供5v电力输出。我需要一个不但可以给树莓派供电,还可以给L298N至少供7v的电力系统。

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vRealize Operations Management Pack for Cisco UCS Review

Cisco UCS blade system is the best blade system I used so far. Whatever the hardware, software or support is perfect. I recommend leverage the system for primary system of virtualization. UCS blade system architecture is different with HP. I feel it more likes a network system. Fabric Interconnect (FI) modules exchange data between uplinks and internal components. IOMs on each chassis controls data routing. Architecture is complicate, but it’s powerful to manage large datacenter. Talking about large datacenter, you may have hundred chassis or blades. Data goes through FIs, IOMs and blades, you could see issues on any layer. It’s hard to find out where exactly the problem is. UCS Manager provides statistics for ports just like how Cisco does on network switches. You can show statistics of a particular port. But it doesn’t tell you when and which layer it happened. I tested Cisco UCS adapter for vRealize Operation Manager before I reviewed NetApp adapter for vRealize Operation Manager. It’s developed by same company Blue Medora. I’d like to introduce few of this product, it’s just my personal review.

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