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With preemptible nodes, a cluster node (with a given hostname) can boot the first time with IP1, then be preempted and boot again with different IP2. With IP="", Calico will autodetect IP1 on first boot, but will not perform autodetection on subsequent boots and so will not release IP1 and detect IP2 instead. With IP=autodetect, Calico will perform autodetection on all boots, which is what we want.
Calico Policy Controller
Calico is an implementation of the Kubernetes network policy API. The provided manifests install:
- A DaemonSet which runs Calico on each node in the cluster.
- A Deployment which installs the Calico Typha agent.
- A Service for the Calico Typha agent.
- Horizontal and vertical autoscalers for Calico.
Learn More
Learn more about Calico at https://docs.projectcalico.org