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Kubernetes

Generate yaml file from existing Kubernetes resources of cluster?

October 16, 2019 comments off
kubernetes-yaml
=======================================
Method 1
=======================================
for n in $(kubectl get -o=name pvc,configmap,serviceaccount,secret,ingress,service,deployment,statefulset,hpa,job,cronjob)
do
mkdir -p $(dirname $n)
kubectl get -o=yaml --export $n > $n.yaml
done
=======================================
Method 2
=======================================
kubectl get all --export=true -o yaml > All-api.yaml
kubectl get all --export=true -o yaml --all-namespaces > All-api.yaml
=======================================
Method 3
=======================================
Exporting all yaml's from all namespaces. For each namespace a directory is made including persistent volumes!
i=$((0))
for n in $(kubectl get -o=custom-columns=NAMESPACE:.metadata.namespace,KIND:.kind,NAME:.metadata.name pv,pvc,configmap,ingress,service,secret,deployment,statefulset,hpa,job,cronjob --all-namespaces | grep -v 'secrets/default-token')
do
if (( $i < 1 )); then
namespace=$n
i=$(($i+1))
if [[ "$namespace" == "PersistentVolume" ]]; then
kind=$n
i=$(($i+1))
fi
elif (( $i < 2 )); then
kind=$n
i=$(($i+1))
elif (( $i < 3 )); then
name=$n
i=$((0))
echo "saving ${namespace} ${kind} ${name}"
if [[ "$namespace" != "NAMESPACE" ]]; then
mkdir -p $namespace
kubectl get $kind -o=yaml --export $name -n $namespace > $namespace/$kind.$name.yaml
fi
fi
done
#and for importing again:
path=$(pwd)
for n in $(ls -d */)
do
echo "Creating namespace ${n:0:-1}"
kubectl create namespace ${n:0:-1}
for yaml in $(ls $path/$n)
do
echo -e "\t Importing $yaml"
kubectl apply -f $path/$n$yaml -n ${n:0:-1}
done
done
=======================================
Method 4
=======================================
Exporting all yaml's from all namespaces. For each namespace a directory is made including persistent volumes and exclude service account tokens:
#!/bin/env bash
## https://github.com/kubernetes/kubernetes/issues/24873#issuecomment-416189335
i=$((0))
for n in $(kubectl get -o=custom-columns=NAMESPACE:.metadata.namespace,KIND:.kind,NAME:.metadata.name pv,pvc,configmap,ingress,service,secret,deployment,statefulset,hpa,job,cronjob --all-namespaces | grep -v 'secrets/default-token')
do
if (( $i < 1 )); then
namespace=$n
i=$(($i+1))
if [[ "$namespace" == "PersistentVolume" ]]; then
kind=$n
i=$(($i+1))
fi
elif (( $i < 2 )); then
kind=$n
i=$(($i+1))
elif (( $i < 3 )); then
name=$n
i=$((0))
if [[ "$namespace" != "NAMESPACE" ]]; then
mkdir -p $namespace
yaml=$((kubectl get $kind -o=yaml $name -n $namespace ) 2>/dev/null)
if [[ $kind != 'Secret' || $yaml != *"type: kubernetes.io/service-account-token"* ]]; then
echo "Saving ${namespace}/${kind}.${name}.yaml"
kubectl get $kind -o=yaml --export $name -n $namespace > $namespace/$kind.$name.yaml
fi
fi
fi
done
view raw Kubernetes-export-yaml-Method1.sh hosted with ❤ by GitHub

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