Authenticated Docker Hub image pulls in Kubernetes

1. imagepullsecret-patcher

   1 1 251 0.0 Go

   Discontinued A simple Kubernetes client-go application that creates and patches imagePullSecrets to service accounts in all Kubernetes namespaces to allow cluster-wide authenticated access to private container registry.

   

   TitanSoft's imagepullsecret-patcher is a single-binary solution to replicating and using an image pull secret across all namespaces. It is not actively maintained, but the tool is simple enough that a small team should be able to patch and maintain a fork if needed. If you want to stick to other maintained open source tools, a reasonable solution can also be put together using external secrets operator. If you are operating a cluster at scale, you may already be using this. Red Hat's patch-operator can be used to attach the imported secrets to your service accounts across all namespaces, though there are some quirks to be wary of, due to the lack of a defined patch strategy for imagePullSecrets on service accounts.

2. SaaSHub

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   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

3. patch-operator

   2 1 114 3.9 Go

   An operator to apply patches to Kubernetes objects in a declarative way.

   

   TitanSoft's imagepullsecret-patcher is a single-binary solution to replicating and using an image pull secret across all namespaces. It is not actively maintained, but the tool is simple enough that a small team should be able to patch and maintain a fork if needed. If you want to stick to other maintained open source tools, a reasonable solution can also be put together using external secrets operator. If you are operating a cluster at scale, you may already be using this. Red Hat's patch-operator can be used to attach the imported secrets to your service accounts across all namespaces, though there are some quirks to be wary of, due to the lack of a defined patch strategy for imagePullSecrets on service accounts.

4. kubernetes

   3 741 112,259 10.0 Go

   Production-Grade Container Scheduling and Management

   

   There is one significant issue with this approach, however: there is no declared patch strategy for imagePullSecrets on service accounts. Without this, the default behavior is to replace the list - so if you had any existing image pull secret references in your service account, these would be removed. See this kubernetes GitHub issue from 2019 that describes the problem in more detail, and why it has not been fixed (tl;dr: specifying a patch strategy will break backwards compatibility, and there has not yet been any desire to introduce a v2 of the ServiceAccount object kind, so we're stuck with the behavior).

5. kops

   4 50 16,038 9.9 Go

   Kubernetes Operations (kOps) - Production Grade k8s Installation, Upgrades and Management

   

   The general problem of patching resource definitions that are not fully under your control has also been recognized for some time. This is true of default resources created and updated by cluster maintenance tools (e.g. kOps), or by public helm charts that you use to install common services and operators (e.g. nginx-ingress, cert-manager, and so on). High quality charts will allow you to override the configuration of important components such as service account references, but some simpler charts offer much less configuration.

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