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Kubernetes 101
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Alexandre González
March 29, 2016
Technology
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630
Kubernetes 101
This was an internal talk made for jobandtalent.com.
You can find the source of the examples here:
Alexandre González
March 29, 2016
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Transcript
kubernetes 101 @agonzalezro
What's Kubernetes? "Kubernetes is an open source orchestration system for
Rocket containers for Docker containers."
None
Concepts NOTE: all the names link to their documentation.
Pod
Replication Controller
Label
Namespace
Service ClusterIP NodePort LoadBalancer
Ingress
{scheduled,}Job
Secrets
New in 1.2
DaemonSet
Deploy (β)
ConfigMap
None
One more thing
Readiness & liveness probes
DEMO! DEMO! DEMO!
AWS export AWS_DEFAULT_PROFILE=myawsprofile export KUBE_AWS_ZONE=eu-west-1c export MASTER_SIZE=m3.medium export NODE_SIZE=m3.medium ...
# config/aws/default-config.sh export KUBERNETES_PROVIDER=aws; wget -q -O - https://get.k8s.io | bash
or GKE gcloud config set project k8s-jobandtalent gcloud container clusters
get-credentials cluster-1
Cluster thingies kubectl cluster-info kubectl config view
Your first cattle kubectl run nginx --image=nginx:1.9.12 # Thanks Kelsey!
kubectl expose deployment nginx --port=80 --type=LoadBalancer
kubectl get services <<< NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes
10.3.240.1 <none> 443/TCP 25m nginx 10.3.247.144 146.148.8.48 80/TCP 1m
kubectl exec -it nginx...
Let's yamlized it cat examples/k8s/*.yml
kubectl create -f ... # Change ... for your yaml
:)
Rolling upgrade kubectl rolling-update hello-rc -f api-rc2.yml
Or... (since 1.2) # edit file kubectl replace -f ...
# where ... is your yaml
And {auto,}scaling kubectl scale rc hello-rc --replicas=5 kubectl autoscale rc
hello-rc --min=X --max=Y
Thanks! @agonzalezro