Kubernetes Online Training Hyderabad | Docker and Kubernetes Training

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Kubernetes Online Training Hyderabad
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• In Kubernetes, a ReplicationController (now often
  replaced by the more flexible and powerful
  ReplicaSet) is a resource that helps ensure a
  specified number of replicas (pod instances) of a
  particular application are running at all times.
• It helps maintain the desired level of
  availability and reliability for your
  applications.

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High Availability

• If you have a critical application and you want
  to ensure that a specific number of identical
  instances are always running, a
  ReplicationController or ReplicaSet can help you
  achieve this by automatically replacing failed or
  terminated pods.

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Scaling

• When you need to scale your application
  horizontally by increasing the number of
  instances, a ReplicationController or ReplicaSet
  can be used to manage the scaling process.
• You can change the desired number of replicas in
  the controller's configuration, and Kubernetes
  will create or terminate pods to match that
  desired count.

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Rolling Updates

• When you need to perform rolling updates or
  rollbacks for your application, a
  ReplicationController or ReplicaSet can be used
  to manage this process. You can create a new
  version of your application as a new pod
  template, then incrementally replace old pods
  with new ones while ensuring the desired replica
  count is maintained.

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Load Balancing

• ReplicationControllers or ReplicaSets work in
  conjunction with services to provide load
  balancing across the instances of your
  application.
• This is especially important in scenarios where
  you need to distribute incoming traffic evenly
  across multiple replicas.

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Self-Healing

• ReplicationControllers and ReplicaSets monitor
  the health of pods they manage. If a pod becomes
  unhealthy or fails, the controller replaces it
  automatically with a new instance, ensuring the
  desired replica count is maintained.

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