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Author: NICK

golang

When to use map vs struct in golang

Posted on June 9, 2020June 9, 2020 by NICK

The time to use a Map: All keys must be the same type All values must be the same type Keys are indexed – we…

golang

Golang value type and reference type

Posted on June 7, 2020 by NICK

In Golang, one of the confusing part is value type and reference type. Value type: int, float, string, bool, structs Reference type: slides, maps, channels,…

Flex Volume

Azure FlexVolume secret in namespace automation

Posted on April 19, 2020 by NICK

I was working on a client who prefer to use azure flex volume to retrieve secret from Azure Key Vault. And they only want to…

AKS

FlexVolume – How to read multiple secrets from Azure Key Vault

Posted on April 19, 2020April 19, 2020 by NICK

I was working on a project to help client to setup FlexVolume for Azure Key Vault in AKS. The setup process is fairly straight forward.…

EKS

How to give IAM user access to EKS

Posted on April 15, 2020April 15, 2020 by NICK

If you have ever use Kubernetes on other cloud providers, you would found, things on EKS works a bit differently. Today I was facing an…

prometheus

How to use prometheus query language to query k8s node memory usage

Posted on April 12, 2020April 12, 2020 by NICK

You will need to port-forward you prometheus to you local 8080 port if you dont have a LB or ingress setup. I have prometheus server…

prometheus

How to install prometheus node exporter on both master and worker nodes

Posted on April 12, 2020April 12, 2020 by NICK

Today I’m working for one of the clients. they are running kubernetes on premise and they want to setup node exporter on both master and…

RDS

How to access RDS from private subnet for both Linux and Windows

Posted on April 10, 2020April 10, 2020 by NICK

You should never expose your database outside of your private network. Let’s use RDS as an example, if you want to access RDS instance, you…

istio

Resolve istio ingress problem with cert manager in AKS

Posted on February 24, 2020 by NICK

I try to help a client to setup istio + cert-manager + azure dns toolsets working on their AKS cluster. My plan is to Get…

Azure Key Vault

ERROR: Max retries exceeded attempting to connect to vault. The vault may not exist or you may need to flush your DNS cache and try again later.

Posted on February 17, 2020 by NICK

I was working on Azure Key Vault in Azure DevOps. I’m trying to retrieve the secret from Azure Key Vault from Azure DevOps pipeline. az…

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Recent Posts

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  • AKS Thanos mtls setup – tls: failed to parse private key
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