External Secrets Operator: Difference between ClusterExternalSecret Vs ExternalSecret

The main difference between a ClusterExternalSecret and an ExternalSecret is that a ClusterExternalSecret is a cluster-wide ExternalSecret that can be used to push an ExternalSecret to all namespaces in the cluster. An ExternalSecret is a namespaced resource that can only be used to push an ExternalSecret to a single namespace.

Another difference is that a ClusterExternalSecret can use a namespaceSelector to select specific namespaces to push the ExternalSecret to. An ExternalSecret does not have a namespaceSelector, so it will be pushed to all namespaces in the cluster by default.

Here is a table that summarizes the key differences between ClusterExternalSecrets and ExternalSecrets:

Here are some examples of when you might use a ClusterExternalSecret:

• To push a database password to all namespaces in the cluster.
• To push an API key to all namespaces in the cluster.
• To push a certificate to all namespaces in the cluster.

Here are some examples of when you might use an ExternalSecret:

• To push a database password to a specific namespace.
• To push an API key to a specific namespace.
• To push a certificate to a specific namespace.

Rajesh Kumar

I’m Rajesh Kumar, a DevOps, SRE, DevSecOps, Cloud, and Platform Engineering expert passionate about sharing practical knowledge, real-world experiences, and industry best practices. I have worked at Cotocus and regularly write about technology, travel, investing, health, product reviews, and digital marketing through my various platforms.

I publish technical articles at DevOps School, travel stories at Holiday Landmark, stock market insights at Stocks Mantra, health and fitness guidance at My Medic Plus, product reviews at TrueReviewNow, and SEO and digital marketing strategies at Wizbrand.