A Technical I.T./DevOps Blog
Problem scenario
You have a URL that works with a curl command (with the -X POST option). You need to get wget to do a POST like curl. You are having trouble getting wget to work. wget returns 403 forbidden errors, but the destination address is the same. It seems as though the source server is different and potentially causing the problem (e.g, by virtue of its IP address).
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Continue reading “How Do You Get wget to Work when curl Commands Are Successful?”
Problem scenario
You created an EKS cluster. But when you open a web browser and go to the API endpoint, you get a 403 forbidden error.
The web browser shows something like this:
kind “Status”
apiVersion “v1”
metadata {}
status “Failure”
message “forbidden: User \”system:anonymous\” cannot get path \”/\””
reason “Forbidden”
details {}
code 403
How do you access the web UI in Kubernetes for the first time?
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Problem scenario
You have created a webhook in Bitbucket to call a Jenkins URL. You create the triggering event in the repository (e.g., by pushing code or creating a pull request). The build associated with the Jenkins URL does not start.
You manually tested the Jenkins URL, bypassing Bitbucket, with curl -X POST. The invocation successfully starts the build.
In the Bitbucket logs you see “Connection refused” or “403 Forbidden” errors when the triggering event happens to the given repository (configured with the webhook).
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Continue reading “How Do You Troubleshoot a Bitbucket Webhook Invocation to Start a Jenkins Build?”
Question
What are the drawbacks of using WordPress when you want syntax highlighting for code in your blog?
Answer
1. When you paste PHP code, it will disappear. In Weebly for example, you can paste PHP code and there will be no automatic elimination of it. In Weebly, the PHP code remains as text. You have to get used to this.
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Continue reading “What Are The Disadvantages of Using WordPress for a Programming Blog?”
Problem scenario
You want to create a basic “Hello World” web page with Node.js running in a Docker container. How do you do this?
Solution
Prerequisite
Install Docker. If you need assistance, see this posting.
Procedures
1. Create three files in the same directory on a Linux server.
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Problem scenario
You want to create an example of a docker compose file. How do you use docker-compose?
Prerequisites
i. This assumes you have Docker installed and running. If you need assistance, see this posting.
ii. This assumes that you have installed docker-compose. If you need assistance, see this posting.
iii. This assumes the Docker host has access to the internet.
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Problem scenario
You have a web-based email provider. You want to save all of your emails in one location quickly. How do you download them into one file?
Solution
If there are maximum size limits for sending a single email (e.g., 25 MB), this method may not work if all of your emails put together exceed this size limit.*
1.
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Problem scenario
You do not want to install wget on Linux. You want curl to download a file from the internet. How do you get curl to work through a forwarding request the same way wget natively works?
Solution
Use the “-L” flag. For example:
curl -L www.continualintegration.com > /tmp/good.html
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Problem scenario
You run a command like this: docker login docker.artifactory
You receive a message like this:
“Error response from daemon: Get https://docker.artifactory:80/v1/users/: dial tcp x.x.x.x:443: i/o timeout”
What should you do?
Solution
Make sure there is no firewall or security group blocking connectivity from the client reaching the Docker registry. Even if you are running the “docker registry” command from the back-end of the Docker registry server itself,
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One of the following problem scenarios apply.
Problem scenario #1
You want an AWS user to be able to log into the web console and view EKS clusters. How do you do this?
OR
Problem scenario #2
You are using AWS and when you log into the AWS Console via a web browser with a user who is a member of a Group with two EKS policies,
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