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title
Using confd to Inject Secrets into Kubernetes Pods
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Introduction Whilst using Kubernetes over the past few months, one challenge I repeatedly faced was to get secrets - such as passwords, SSH keys or certificate keys - securely into applications running on Kubernetes. Whilst this is quite easy if the container image is under your full control, to achieve this with an ‘off the shelf’ image is a little more tricky. One tool I came across recently was confd - which has helped a lot with this challenge and below I will outline how. confd Basics confd is a tool for rendering configuration files from predefined templates using values (secrets) that are stored in a backend. A backend could be etcd, Amazon SSM Parameter Store, Hashicorp Vault or many others. The examples below will be using the Amazon SSM Parameter Store backend. For Kubernetes clusters running on AWS this works really well as Amazon IAM roles can be used, mitigating the use for storing the backend password anywhere. I won’t go into too much detail on the basics ...
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