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There are several ways to ensure the safe operation of an Apache container on Kubernetes:

1. Use a secure base image: Begin by using a secure base image for the Apache container. Choose a base image from a reputable source that provides regular updates and security patches.

2. Set resource limits: Kubernetes allows you to set resource limits on containers, such as CPU and memory limits. Ensure that the Apache container is assigned appropriate resource limits to prevent it from overloading and crashing.

3. Use Kubernetes secrets for sensitive data: Avoid storing sensitive data like passwords, API tokens, and private keys unencrypted in the container. Instead, use Kubernetes secrets to manage and secure the sensitive data.

4. Monitor logs and metrics: Monitor the logs and metrics of the Apache container to detect and troubleshoot any issues proactively. Use tools like Kubernetes dashboard or Prometheus to monitor the container logs and metrics.

5. Use network policies: Implement network policies to control the traffic entering and leaving the container. This measure helps prevent unauthorized access and protects sensitive data.

6. Regularly update and patch: Keep the container up to date by applying the latest patches and software updates regularly. This measure helps address any known vulnerabilities and keeps the container secure.