A Technical I.T./DevOps Blog
Question: In PowerShell, how do you convert an array value into an integer value?
Answer: Assuming that the value is an integer (e.g., not value that is legal for an array but not an integer), do the following:
1. Write the array value to a file.
2. Use the key word trim to eliminate blank space or other characters that would not be supported by the integer data type.
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Problem scenario: Using a CM tool, you transfer a PowerShell script to do an unattended installation on Windows Server 2012. The CM tool transfers the media and the PowerShell script and launches the script once transferred. However, when you log into the Windows Server, you do not see the application installed. When you manually run the PowerShell script and transfer the media over, there is no problem. You want the CM tool to do the installation (transfer of media and execution of the PowerShell script).
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Problem scenario
When running various Ansible operations, such as “ping,” result in an error like this “SSL: 500 WinRM Transport. [Error 104] Connection reset by peer.” What should you do to get Ansible to work with Windows managed nodes?
Solution
Prerequisites
Install pip. If you need assistance, see this posting.
Procedures
Upgrade pywinrm to 0.2.2.
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Question: How Do You Boot To CD/DVD-ROM on an HP Laptop one time (e.g., to reformat it)?
Answer:
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Ansible’s documentation (http://docs.ansible.com/ansible/intro_windows.html#inventory) indicates that inventory variables (in .yml files) are assigned with colons (“:”) and not equals (“=”) signs. However in practice, equals (“=”) signs are necessary for key-value assignments and colons (“:”) do not work. If you have found their documentation to be correct, please post a comment.
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Problem Scenario: You want to run VMs on your Linux server. You are running Ubuntu 16. You want to install Virtual Machine Manager (a free software package).
Solution:
1. Run this command to see if you have processors that can support virtualization:
sudo cat /proc/cpuinfo | grep -c svm || cat /proc/cpuinfo | grep -c vmx
If the result shows a 1 or higher,
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Problem Scenario
In CloudBolt (the Cloud Management Platform), you run a job to create a server. The job stops progressing. The GUI shows “Failed Order … provisioning nameOfServer” with a bar that has the left most 5% red and the rest of the 95% gray. What do you do to create the server?
Answer
The server may be created; there may have been a small error when the job ran.
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Problem Scenario You try to use an AWS CLI command, but you get an error. The error says “[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:…)”
Possible solutions
#1 Redo the AWS configuration. Issue this command: aws configure
Leave the AWS Access Key ID and the AWS Secret Access Key the way they are. Look at the “Default region name.” Verify there is no letter at the end.
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Continue reading “How To Resolve “Certificate_Verify_Failed” error when trying an AWS CLI command?”
Problem scenario: A Linux server provides an error “Stale NFS filehandle” message.
Potential root causes: A file was opened on another server and was deleted, replaced or given a new name.
Solution: Unmount the NFS share and mount it again.
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AWS used to have a separate API package from their CLI package; now the two are the same. OpenStack components’ command line interface activity is captured in a log when proper thresholds are set (e.g., nova.conf, glance.conf etc.) and later met. CLI activity (which bypasses Horizon) as well as GUI API activity (e.g., mouse clicks on buttons in Horizon) is written to a file named api.log. The location of this api.log file follows this convention: /var/log/OpenStackComponentName/api.log (where “OpenStackComponentName” is nova,
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Continue reading “The Apparent Story Behind OpenStack Component Log File Names”