[RunBook]: Kubernetes Certificate Rotation

[shloka-bhalgat-unskript]

Contact Details

No response

RunBook Name

Kubernetes Certificate Rotation

runbook Inputs

namespace

runBook Actions

find expiring k8s certificates
renew them

Comments

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[shloka-bhalgat-unskript]

To renew k8s certificates, we need to generate one manually where we need to give the private key's path. I don't think this is doable as of now. Is there any other way @amit-chandak-unskript

Steps

Renew K8s certificates

Renewing certificates typically involves generating a new certificate signing request (CSR) and then obtaining a renewed certificate from a certificate authority (CA). The process may vary depending on your specific CA and certificate management setup. Here’s a general outline of the steps you can follow to renew certificates using the CLI:

1. Generate a new CSR:
   To renew a certificate, you need to generate a new CSR. You can use the OpenSSL command-line tool to generate a CSR. Here’s an example command:
   openssl req -new -key <private_key_file> -out <csr_file>
   Replace <private_key_file> with the path to the private key associated with the certificate you want to renew. <csr_file> should be the path where you want to save the new CSR.

2. Submit the CSR to your certificate authority:
   Once you have the new CSR, you need to submit it to your certificate authority to obtain a renewed certificate. The process for submitting the CSR varies depending on your CA. Refer to your CA’s documentation for the specific steps.

3. Obtain the renewed certificate:
   Follow the instructions provided by your certificate authority to obtain the renewed certificate. This might involve downloading the certificate from their web portal or receiving it via email.

4. Update the existing secret with the renewed certificate:
   Once you have the renewed certificate, you need to update the existing secret in Kubernetes with the new certificate data. You can use the kubectl command to update the secret. Here’s an example command:

kubectl create secret tls <secret_name> --cert=<path_to_renewed_cert> --key=<path_to_private_key> --dry-run=client -o yaml | kubectl apply -f -
Replace <secret_name> with the name of the secret you want to update. <path_to_renewed_cert> should be the path to the renewed certificate file, and <path_to_private_key> should be the path to the private key associated with the certificate. This command creates a new temporary secret YAML file with the updated certificate data and applies it to the cluster.

After applying the updated secret, Kubernetes will automatically load the renewed certificate for the associated resources (e.g., Ingress, Deployment) that reference the secret.

[amit-chandak-unskript]

To renew k8s certificates, we need to generate one manually where we need to give the private key's path. I don't think this is doable as of now. Is there any other way @amit-chandak-unskript

Steps

Renew K8s certificates

Renewing certificates typically involves generating a new certificate signing request (CSR) and then obtaining a renewed certificate from a certificate authority (CA). The process may vary depending on your specific CA and certificate management setup. Here’s a general outline of the steps you can follow to renew certificates using the CLI:

1. Generate a new CSR:
   To renew a certificate, you need to generate a new CSR. You can use the OpenSSL command-line tool to generate a CSR. Here’s an example command:
   openssl req -new -key <private_key_file> -out <csr_file>
   Replace <private_key_file> with the path to the private key associated with the certificate you want to renew. <csr_file> should be the path where you want to save the new CSR.
2. Submit the CSR to your certificate authority:
   Once you have the new CSR, you need to submit it to your certificate authority to obtain a renewed certificate. The process for submitting the CSR varies depending on your CA. Refer to your CA’s documentation for the specific steps.
3. Obtain the renewed certificate:
   Follow the instructions provided by your certificate authority to obtain the renewed certificate. This might involve downloading the certificate from their web portal or receiving it via email.
4. Update the existing secret with the renewed certificate:
   Once you have the renewed certificate, you need to update the existing secret in Kubernetes with the new certificate data. You can use the kubectl command to update the secret. Here’s an example command:

kubectl create secret tls <secret_name> --cert=<path_to_renewed_cert> --key=<path_to_private_key> --dry-run=client -o yaml | kubectl apply -f - Replace <secret_name> with the name of the secret you want to update. <path_to_renewed_cert> should be the path to the renewed certificate file, and <path_to_private_key> should be the path to the private key associated with the certificate. This command creates a new temporary secret YAML file with the updated certificate data and applies it to the cluster.

After applying the updated secret, Kubernetes will automatically load the renewed certificate for the associated resources (e.g., Ingress, Deployment) that reference the secret.

Again, i dont have an answer right now for this