while($true)
{
try
{
$mutex = [System.Threading.Mutex]::OpenExisting('Global\_MSIExecute')
$mutex = $null
Sleep 10
'MSI running...' | Out-Default
}
catch [System.Threading.WaitHandleCannotBeOpenedException]
{
# Mutex not found; MSI isn't running
break
}
}
Howto install AWS CodeDeploy on EC2 Windows instance by using CloudInit
- Create user-data.txt file
————–<powershell> New-Item -ItemType Directory -Force -Path c:\temp Read-S3Object -BucketName aws-codedeploy-us-east-1/latest -Key codedeploy-agent.msi -File c:\temp\codedeploy-agent.msi start c:\temp\codedeploy-agent.msi '/qn /l*v c:\temp\host-agent-install-log.txt' </powershell>
————–
- Go to AWS EC2 console and select Windows image (e.g. Windows_Server-2012-R2_RTM-English-64Bit-Base-2014.10.15 (ami-ba13abd2))
- Click Launch/Spot Request
- Provide user data as user-data.txt file
- Now you will get Windows instance with AWS CodeDeploy installed. Enjoy!
Howto delete all files from AWS S3 bucket by using PowerShell
$bucket = 'YOUR-BUCKET-NAME'
Get-S3Object -BucketName $bucket | % {
Remove-S3Object -BucketName $bucket -Key $_.Key -Force:$true
}
Howto rename Lotus Notes field by using PowerShell
You need to have Lotus Notes client installed on your machine. Then you need to run PowerShell (x86).
$lns = New-Object -ComObject Lotus.NotesSession
$lns.Initialize()
$db= $lns.GetDatabase('','YOUR_DB_NAME')
$doc = $db.GetDocumentByUNID('1E733555DDB27DA785257D7E005E64B0')
$doc.RemoveItem('TARGET_FIELD_NAME')
$doc.CopyItem($doc.GetFirstItem('SOURCE_FIELD_NAME'),'TARGET_FIELD_NAME')
$doc.RemoveItem('SOURCE_FIELD_NAME')
$doc.Save($false, $true)
Howto disable hotlinking for your AWS S3 resources
It is good idea to serve static content (e.g. images, video, …., not a JavaScript files) on AWS S3 instead of from your AWS EC2 server. In this case you reduce the workload on your web application.
The problem is that AWS S3 resources are not available for public by default.
The simple stupid solution is to make them all publicly available.
But what if we are talking about protected Web application where clients should enter credentials first to access the application. And one of the requirement is that all data should be not easily available! E.g. shouldn’t be referenced by other sites (hotlinking) or crawled by the search engines.
AWS S3 for everyone doesn’t work here.
Fortunately you can create the AWS S3 bucket policy which will allows to access the resources only for the particular referrers:
{
"Version": "2008-10-17",
"Id": "Vlasenko Access",
"Statement": [
{
"Sid": "AllowPublicRead",
"Effect": "Allow",
"Principal": {
"AWS": "*"
},
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::TestPolicy/*",
"Condition": {
"StringLike": {
"aws:Referer": [
"http://vlasenko.org/*",
"http://vlasenko.guru/*",
"http://vlasenko.ninja/*"
]
}
}
}
]
}
The image above available only trough this blog post. Try to copy the URL and paste it into a new tab in your browser. Don’t use Open link in new Tab!
Amazon RDS Now Supports T2 Instances
That is good news.
T2 instances CPU credits is really great feature introduced 2 months ago for EC2. Amazon RDS Now Supports T2 Instances
At the same time the price for T2 RDS instances is twice less then for the previous generation.
T2.micro EC2 + T2.micro RDS are good if you are thinking about web app which will have the “scheduled” workload. E.g. the main customers are from the particular region.
While the instance is IDLE it accumulate CPU credits. And you servers will be able to burst above the baseline as needed. You can track your CPU Credits trough AWS Console. It is really fun to track them
On the image below one of my EC2 instance has 150 CPU Credits. This means that it will be able to rocket up to the “cloud” if needed. But still you pay for micro instance. CPU Credits really brilliant idea from Amazon!
From Evolution to Inevitolution by Dmitri Dozortsev
Originally posted on Fertility Conundrums
…
Civilization development is driven by scientific discoveries which have to inevitably happen. One human being has very little value for this inevitability: individual human’s only intrinsic inevitable quality is death. As number of humans was small, it was taking a long time from one discovery to another. For example, it took thousands of years to exit the stone age and enter bronze age. The man who came up with the first stone tool had no competition for thousands of years. Today, when I get a “new” idea in my small and highly specialized field, I can be assured with 99% certainty that someone had exactly the same idea a few days or perhaps few years ago. It becomes incredibly hard to be original … which means that all possible discoveries became inevitable. This inevitability of increased complexity of civilization is not directed by anything or anybody, but an intrinsic property of a large group of humans: everything that can be discovered advancing humanity to an unknown, unpredictable and yet inevitable finale. We do not know who will make a discoveries, we don’t know how it will happen, but they will happen with absolute certainty. Just like in quantum mechanics, everything that can happen will happen, given enough time.
This increase of complexity is not only inevitable, but the speed with which inevitable outcome is achieved is continuously accelerating by virtue of population increase.
…
Configure WSO2 Identity Server as SAML2 SSO IDP
Disable the option to check for server certificate revocation on Internet Explorer
We are doing an extensive acceptance testing against SharePoint Online by using PowerSlim (PowerShell).
Unfortunately sometimes our automated tests are blocked by popup below:
As we truly believe that our DNS is not spoiled an we know exactly what we are looking for (pre-created data) – this verification doesn’t make any sense for us.
So we decided to disable it. I was not able to find the solution how to do this trough Windows Registry. Below is how you can do this trough Internet Explorer:
- Open Internet Options
- Go to Advanced tab
- Scroll down to the Security section
- Clear check-box below:
- Restart Internet Explorer
Split a project between the teams and not other way around!
Software development managers accustomed to moving people around the projects.
Instead they should be able to split a project between the teams and not other way around!
This implies that software development manager should be a software development practitioner.
There is a lot of similar ideas around this topic below by Pieter Hintjens
Konstantin Vlasenko 