It is really common to receive “No space left on device” if you don’t allocate enough disk space to an ec2 instance. It can be occurred due to an unexpected large log file too. However most of the time, we can’t even run any command or login to the ec2…

Using AWS secrets manager to store your Kubernetes secrets and retrieve data from the secrets manager give you couple of benefits. You don’t need to store your secrets as plaintext in configuration files, or use etcd access secrets through file system. You do not need to write custom codes to…

Kubernetes supports executing commands before the container termination. So if we need to capture heap dump in the event of container termination to analyze an issue, we can use a Kubernetes feature called pre-stop hook. We can include the command that we need to execute before container termination to…

“eksctl” is a very popular and useful tool which can be used to create and manage kubernetes clusters in AWS. It allows us to keep the cluster config as a file so that we know what are the configs that we use to spin up the clusters. If we…

One of the most common question with the Kubernetes deployment is, do we really need liveness or readiness probes? The simple answer to this question is ‘YES’, let’s dive into more details so that you will understand why. Liveness and readiness are the two main probe types available in Kubernetes…

By default lambda is not bound to a VPC and it can communicate with all the resources inside public subents. However, there are many use cases that you need to connect your lambda with databases, ec2 or internal services inside private subnets in a VPC. To access those resources inside…

Serverless deployment needs to import libraries and dependencies into the Lambda functions. So the easiest way to import those third party dependencies to your function is to use Lamda Layers. Today I am going to show you how to use this lambda layer inside your CDK code. The example code…

There are cases that we need to deal with passing information inside lambda function using environment variables. Here I am giving an example with CDK python which passes environment variable to a lambda and use those environment variables value inside the lambda. base_lambda = lb.Function(self, 'base_lambda', code = lb.Code.from_asset('lambda'), handler…

If you are here, you may have a pretty good knowledge of how to use AWS CDK for defining cloud infrastructure in code and provisioning it through AWS. So let’s get started on how to grant permission to your lambda function to access the resources in another AWS account. …