How big can a Kubernetes secret be?
The secret data on nodes is stored in tmpfs volumes. A per-secret size limit of 1MB exists.1MiB

Individual secrets are limited to 1MiB in size. This is to discourage creation of very large secrets that could exhaust the API server and kubelet memory. However, creation of many smaller secrets could also exhaust memory.253 characters

This means the name must: contain no more than 253 characters.

What is the maximum cluster size in Kubernetes : 5,000 nodes

Kubernetes v1. 29 supports clusters with up to 5,000 nodes. More specifically, Kubernetes is designed to accommodate configurations that meet all of the following criteria: No more than 110 pods per node.

What is the maximum size of Helm secret

1MB

Helm v3 stores chart state in a Kubernetes secret by default. Kubernetes secrets are limited to a max size based on etcd's configuration. The default etcd configuration limits secrets to a maximum size of 1MB.

Is it safe to use Kubernetes secrets : Kubernetes Secrets are used to store sensitive information such as passwords, tokens, and certificates in a secure way. Secrets can be used by Kubernetes deployments, pods, and other resources that require this sensitive data. We all need someone to keep our secrets safe, in this case, it's in Kubernetes!

Limitations of Kubernetes Secrets

While Kubernetes Secrets provide a convenient way to manage sensitive data, they have some limitations: Limited encryption: by default, secrets are stored unencrypted in etcd . K8s does support encryption, but the encrypting key needs separate management.

While Kubernetes encrypts Secrets at rest, there is no native encryption of Secrets in transit within the cluster. This means that if an attacker gains access to the cluster, they could potentially eavesdrop on the communication and intercept sensitive data being transferred.

What is the maximum size of secret in Azure

25 KB

The storage capacity of an Azure Key Vault is limited by the total size of all the secrets, certificates, and keys stored within it. The maximum size of a single Key Vault is 25 KB (25,600 bytes) for standard vaults and 50 KB (51,200 bytes) for premium vaults.2048

The description of the secret. Length Constraints: Maximum length of 2048. Specifies whether to overwrite a secret with the same name in the destination Region.A label key and value must begin with a letter or number, and may contain letters, numbers, hyphens, dots, and underscores, up to 63 characters each. Optionally, the key can begin with a DNS subdomain prefix and a single '/', like example.com/my-app.

Maximum number of monitored resources in a cluster administrative domain. 200 000. Notes: Only 256 configuration objects are allowed in a cluster resource group if TCP/IP addresses are IPv4 format. Only 200 configuration objects are allowed in a cluster resource group if TCP/IP addresses are IPv6 format.

What is the size limitation of Helm chart : It is okay to add extra files to your Helm chart. These files will be bundled. Be careful, though. Charts must be smaller than 1M because of the storage limitations of Kubernetes objects.

How does Helm handle secrets : When it comes to handling secrets, Helm treats them as part of its templates, just like other Kubernetes resources such as Deployments and ConfigMaps. These templates can reference values defined in the values. yaml file.

Why are Kubernetes secrets insecure

While Kubernetes encrypts Secrets at rest, there is no native encryption of Secrets in transit within the cluster. This means that if an attacker gains access to the cluster, they could potentially eavesdrop on the communication and intercept sensitive data being transferred.

Better Alternatives Exist:

Services like HashiCorp Vault or AWS Secrets Manager are purpose-built for secure secret management. These services provide robust features like encryption at rest, access controls, and audit logs, ensuring a higher level of security compared to raw Kubernetes secrets.In conclusion, Kubernetes is a powerful container orchestration platform that simplifies the deployment, scaling, and management of containerized applications. It offers numerous advantages, including scalability, fault tolerance, portability, resource efficiency, and extensibility.

Is k8s secret safe : How to Encrypt and Protect Kubernetes Secrets. We said above that Kubernetes Secrets are secure when they are properly managed. The keyword there is “properly managed” – and to manage secrets data properly in Kubernetes, you need to take some extra steps. By default, Secrets are not especially secure.