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https://github.com/kelseyhightower/kubernetes-the-hard-way.git
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add codes
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Yuri Liang
240
codes/scripts/generate-certs.sh
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240
codes/scripts/generate-certs.sh
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#!/bin/bash
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########################
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# Install Clinet Tools #
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########################
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# Only for MacOS (Because I love MacOS)
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brew install cfssl
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brew cask install google-cloud-sdk
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if [ ! -f /usr/local/bin/kubectl ]; then
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curl -o kubectl https://storage.googleapis.com/kubernetes-release/release/v1.18.6/bin/darwin/amd64/kubectl
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chmod +x kubectl
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sudo mv kubectl /usr/local/bin/
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fi
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##############################################################################################
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# provision a Certificate Authority that can be used to generate additional TLS certificates #
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##############################################################################################
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# Generate the CA configuration file, certificate, and private key
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cat > ca-config.json <<EOF
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{
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"signing": {
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"default": {
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"expiry": "8760h"
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},
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"profiles": {
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"kubernetes": {
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"usages": ["signing", "key encipherment", "server auth", "client auth"],
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"expiry": "8760h"
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}
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}
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}
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}
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EOF
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cat > ca-csr.json <<EOF
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{
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"CN": "Kubernetes",
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"key": {
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"algo": "rsa",
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"size": 2048
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},
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"names": [
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{
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"C": "US",
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"L": "Portland",
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"O": "Kubernetes",
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"OU": "CA",
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"ST": "Oregon"
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}
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]
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}
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EOF
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cfssl gencert -initca ca-csr.json | cfssljson -bare ca
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# generate client and server certificates for each Kubernetes component and a client certificate for the Kubernetes admin user.
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cat > admin-csr.json <<EOF
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{
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"CN": "admin",
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"key": {
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"algo": "rsa",
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"size": 2048
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},
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"names": [
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{
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"C": "US",
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"L": "Portland",
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"O": "system:masters",
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"OU": "Kubernetes The Hard Way",
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"ST": "Oregon"
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}
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]
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}
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EOF
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cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin
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# create a certificate for each Kubernetes worker node that meets the Node Authorizer requirements
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for instance in kubernetes-worker-0 kubernetes-worker-1 kubernetes-worker-2; do
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cat > ${instance}-csr.json <<EOF
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{
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"CN": "system:node:${instance}",
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"key": {
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"algo": "rsa",
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"size": 2048
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},
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"names": [
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{
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"C": "US",
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"L": "Portland",
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"O": "system:nodes",
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"OU": "Kubernetes The Hard Way",
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"ST": "Oregon"
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}
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]
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}
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EOF
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EXTERNAL_IP=$(gcloud compute instances describe ${instance} --format 'value(networkInterfaces[0].accessConfigs[0].natIP)')
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INTERNAL_IP=$(gcloud compute instances describe ${instance} --format 'value(networkInterfaces[0].networkIP)')
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cfssl gencert \
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-ca=ca.pem \
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-ca-key=ca-key.pem \
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-config=ca-config.json \
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-hostname=${instance},${EXTERNAL_IP},${INTERNAL_IP} \
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-profile=kubernetes \
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${instance}-csr.json | cfssljson -bare ${instance}
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done
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# Generate the kube-controller-manager client certificate and private key
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cat > kube-controller-manager-csr.json <<EOF
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{
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"CN": "system:kube-controller-manager",
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"key": {
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"algo": "rsa",
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"size": 2048
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},
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"names": [
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{
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"C": "US",
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"L": "Portland",
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"O": "system:kube-controller-manager",
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"OU": "Kubernetes The Hard Way",
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"ST": "Oregon"
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}
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]
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}
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EOF
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cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-controller-manager-csr.json | cfssljson -bare kube-controller-manager
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# Generate the kube-proxy client certificate and private key
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cat > kube-proxy-csr.json <<EOF
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{
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"CN": "system:kube-proxy",
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"key": {
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"algo": "rsa",
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"size": 2048
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},
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"names": [
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{
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"C": "US",
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"L": "Portland",
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"O": "system:node-proxier",
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"OU": "Kubernetes The Hard Way",
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"ST": "Oregon"
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}
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]
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}
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EOF
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cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
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# Generate the kube-scheduler client certificate and private key
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cat > kube-scheduler-csr.json <<EOF
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{
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"CN": "system:kube-scheduler",
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"key": {
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"algo": "rsa",
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"size": 2048
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},
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"names": [
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{
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"C": "US",
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"L": "Portland",
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"O": "system:kube-scheduler",
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"OU": "Kubernetes The Hard Way",
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"ST": "Oregon"
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}
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]
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}
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EOF
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cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-scheduler-csr.json | cfssljson -bare kube-scheduler
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# Generate the Kubernetes API Server certificate and private key
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KUBERNETES_PUBLIC_ADDRESS=$(gcloud compute addresses describe external-ip --region $(gcloud config get-value compute/region) --format 'value(address)')
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KUBERNETES_HOSTNAMES=kubernetes,kubernetes.default,kubernetes.default.svc,kubernetes.default.svc.cluster,kubernetes.svc.cluster.local
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cat > kubernetes-csr.json <<EOF
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{
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"CN": "kubernetes",
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"key": {
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"algo": "rsa",
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"size": 2048
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},
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"names": [
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{
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"C": "US",
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"L": "Portland",
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"O": "Kubernetes",
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"OU": "Kubernetes The Hard Way",
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"ST": "Oregon"
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}
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]
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}
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EOF
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cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -hostname=10.32.0.1,10.240.0.10,10.240.0.11,10.240.0.12,${KUBERNETES_PUBLIC_ADDRESS},127.0.0.1,${KUBERNETES_HOSTNAMES} -profile=kubernetes kubernetes-csr.json | cfssljson -bare kubernetes
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# Service Account Key Pair
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cat > service-account-csr.json <<EOF
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{
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"CN": "service-accounts",
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"key": {
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"algo": "rsa",
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"size": 2048
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},
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"names": [
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{
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"C": "US",
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"L": "Portland",
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"O": "Kubernetes",
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"OU": "Kubernetes The Hard Way",
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"ST": "Oregon"
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}
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]
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}
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EOF
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cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes service-account-csr.json | cfssljson -bare service-account
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# Copy the appropriate certificates and private keys to each worker instance
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for instance in kubernetes-worker-0 kubernetes-worker-1 kubernetes-worker-2; do
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gcloud compute scp ca.pem ${instance}-key.pem ${instance}.pem ${instance}:~/
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done
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# Copy the appropriate certificates and private keys to each controller instance
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for instance in kubernetes-controller-0 kubernetes-controller-1 kubernetes-controller-2; do
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gcloud compute scp ca.pem ca-key.pem kubernetes-key.pem kubernetes.pem \
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service-account-key.pem service-account.pem ${instance}:~/
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done
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