How to copy S3 objects between AWS accounts
In your source account create a customer-managed policy:
{
"Version": "2012-10-17",
"Statement": [
{ …Technical Articles
In-depth guides, insights, and best practices for modern software engineering
How to find all symlinks in a directory tree on Mac
If you need to recursively find all symbolic links in a directory tree on a Mac, then you have a couple of options.
You could be trying to find them …
Read Article →How to Install App Mesh on AWS EKS
You can follow the steps below to install App Mesh on AWS EKS (Kubernetes).
Step 1 – Prerequisites
curl -o pre_upgrade_check.sh …[Solved] Kubernetes Namespace stuck in Terminating state
If you have tried to delete a Kubernetes namespace, and it has been hanging in ‘deleting’ for hours on end, it’s likely that you have …
Read Article →[Solved] Error creating: pods “my-service-a-xxx” is forbidden: error looking up service account my-apps/my-service-a: serviceaccount “my-service-a” not found
So you’ve run a deployment and tried to check the pods and there’s nothing there!
kubectl get pods
Next step is to see what’s …
Read Article →[Solved] error: src refspec main does not match any
If you get the following error:
error: src refspec main does not match any
error: failed to push some refs to 'https://github.com/ao/xxx.git' …How to Force a Redeploy in Kubernetes
If you need to force a redeploy of a deployment in Kubernetes, then you can use the rollout feature.
You may have an image that has been updated, but …
Read Article →How to Print to stdout in Flask using Python
If you are trying to print() to the console/stdout in your Flask app, but nothing is happening, then you just need to flush your prints, as follows: …
How to Restart a Deployment in Kubernetes
If you need to restart a deployment in Kubernetes, perhaps because you would like to force a cycle of pods, then you can do the following:
Step 1 – …
Read Article →How to push multiple Dockerfile apps to AWS ECR at the same time
I have a parent directory containing multiple sub-directories. Each of these child directories is a different application and contains a Dockerfile.
I …
Read Article →How to Create a Horizontal Pod Autoscaler in Kubernetes
If you could like to a create a Horizontal Pod Autoscaler (hpa) in Kubernetes, then you could run the following:
Step 1 – Create a Deployment
If you …
Read Article →How to Run a Load Generator on Kubernetes
If you would like to test hpa, Horizontal Pod Autoscaling, or throw some chaos at a specific deployment in Kubernetes, then you could run a Load …
How to Deploy a Metrics Server in Kubernetes
If you would like to deploy a Metrics Server in Kubernetes, then you first need to create a namespace for it to live it, followed by installing the …
Read Article →How to create an AWS EKS cluster using eksctl
eksctl dramatically simplifies the creation of AWS EKS clusters, by providing a simple command-line interface.
Step 1 – Define a Cluster YAML
You can …
Read Article →How to Dockerize a Flask App
If you have a Flask app that you would like packaged in a Docker container, then you can do the following. The steps outlined below will help you …
Read Article →How to get an EKS Cluster name from an AWS Region
You can use the aws cli to get the EKS cluster name, parse the first result and return it into a variable.
This is handy in automation scripts where …
Read Article →How to automatically generate a Manifests file in Kubernetes
If you want to automatically generate a manifest file in Kubernetes, you can do so by using the kubectl run command coupled with a --dry-run to output …
How to Sort Pods by CreationTimestamp in Kubernetes
If you need to sort a list of your pods by their CreationTimestamp, then do the following:
kubectl get pods -n kube-system …How to Jump onto a Kubernetes Pod with Bash
If you want to jump onto a particular Kubernetes Pod and run Bash within it, you can do so as follows:
kubectl exec -ti <pod_name> /bin/bash
You …
Read Article →How to run Shell Commands in a Kubernetes Cluster
If you would like to run shell commands inside of your Kubernetes cluster, then you can use the kubectl run command.
What the syntax looks like …
Read Article →How to Bulk Move All Email from One Account to Another using the CLI
If you find yourself in a position where you need to sync all emails from one account to another, then you can use the imapsync command-line tool to …
How to Install AWS CLI on Linux
You can download and install the AWS CLI v2 on Linux as follows. This works on most x86_64 Linux distributions including Ubuntu, Amazon Linux, and …
Read Article →How to Reboot Networking on Mac from CLI
If you need to reboot, or restart the networking interface on your Mac, by using the CLI, then you can issue the following commands:
Using the …
Read Article →[Solved] fatal: unable to access <git>: SSL certificate problem: self signed certificate in certificate chain
If you get the following error:
fatal: unable to access <git>: SSL certificate problem: self signed certificate in certificate chain
..when …
Read Article →