Create and delete pods on kubernetes via Python kubernetes API

orc.py

"""
Intuition:

Assume we have pod1 and pod2 in 'default' namespace, and
we want to create and delete pod1 or pod2 on the fly.
Also, we can monitor their status on the fly.

Extention:

If our intuition works on kubernates python API, then
we can easily manage our pods to allocate arbitrary
tasks.

Reference:

a. Requirements: https://goo.gl/JXyxCd
b. Basic: https://github.com/kubernetes-client/python/blob/master/examples/notebooks/create_pod.ipynb
c. Minikube for your local: https://github.com/kubernetes/minikube
"""
from kubernetes import client, config


def show_pod_status(namespace):
    ret = v1.list_namespaced_pod(namespace)
    for i in ret.items:
        vals = (i.status.pod_ip, i.metadata.namespace, i.metadata.name)
        print("%s  %s  %s" % vals)


# Load config
config.load_kube_config()
v1 = client.CoreV1Api()

# Define container
container = client.V1Container(
    name="busybox",
    image="busybox",
    args=["sleep", "3600"])

# Define Pod based on containers
pod1 = client.V1Pod()
spec = client.V1PodSpec(containers=[container])
pod1.metadata = client.V1ObjectMeta(name="pod1")
pod1.spec = spec

pod2 = client.V1Pod()
spec = client.V1PodSpec(containers=[container])
pod2.metadata = client.V1ObjectMeta(name="pod2")
pod2.spec = spec

# Show current status
print("=== Before creation: ")
show_pod_status("default")

# Create pod
v1.create_namespaced_pod(namespace="default",body=pod1)
v1.create_namespaced_pod(namespace="default",body=pod2)

# Show current status
print("=== After creation: ")
show_pod_status("default")

# Delete pod2 only
v1.delete_namespaced_pod(name=pod2.metadata.name, namespace="default", body=client.V1DeleteOptions())

# After a couple of sec (kubernetes tries to delete pod)
# You can see only pod1
print("=== After deletion: ")
show_pod_status("default")

Wondering:

• auto-healing?
• who actually controll?
• where the state saved?

I used virtualbox backend for minikube:

$ brew cask install virtualbox