c12s-kubespray/roles/kubernetes-apps/helm/templates/helm-make-ssl.sh.j2

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#!/bin/bash
set -o errexit
set -o pipefail
usage()
{
cat << EOF
Create self signed certificates
Usage : $(basename $0) -f <config> [-d <ssldir>]
-h | --help : Show this message
-e | --helm-home : Helm home directory
-d | --ssldir : Directory where the certificates will be installed
EOF
}
# Options parsing
while (($#)); do
case "$1" in
-h | --help) usage; exit 0;;
-e | --helm-home) HELM_HOME="${2}"; shift 2;;
-d | --ssldir) SSLDIR="${2}"; shift 2;;
*)
usage
echo "ERROR : Unknown option"
exit 3
;;
esac
done
if [ -z ${SSLDIR} ]; then
SSLDIR="/etc/kubernetes/helm/ssl"
fi
tmpdir=$(mktemp -d /tmp/helm_cacert.XXXXXX)
trap 'rm -rf "${tmpdir}"' EXIT
cd "${tmpdir}"
mkdir -p "${SSLDIR}"
# Root CA
if [ -e "$SSLDIR/ca-key.pem" ]; then
# Reuse existing CA
cp $SSLDIR/{ca.pem,ca-key.pem} .
else
openssl genrsa -out ca-key.pem 4096 > /dev/null 2>&1
openssl req -x509 -new -nodes -key ca-key.pem -days {{certificates_duration}} -out ca.pem -subj "/CN=tiller-ca" > /dev/null 2>&1
fi
gen_key_and_cert() {
local name=$1
local subject=$2
openssl genrsa -out ${name}-key.pem 4096 > /dev/null 2>&1
openssl req -new -key ${name}-key.pem -sha256 -out ${name}.csr -subj "${subject}" > /dev/null 2>&1
openssl x509 -req -in ${name}.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out ${name}.pem -days {{certificates_duration}} > /dev/null 2>&1
}
#Generate cert and key for Tiller if they don't exist
if ! [ -e "$SSLDIR/tiller.pem" ]; then
gen_key_and_cert "tiller" "/CN=tiller-server"
fi
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#Generate cert and key for Helm client if they don't exist
if ! [ -e "$SSLDIR/helm.pem" ]; then
gen_key_and_cert "helm" "/CN=helm-client"
fi
# Secure certs to first master
mv *.pem ${SSLDIR}/
# Install Helm client certs to first master
# Copy using Helm default names for convenience
cp ${SSLDIR}/ca.pem ${HELM_HOME}/ca.pem
cp ${SSLDIR}/helm.pem ${HELM_HOME}/cert.pem
cp ${SSLDIR}/helm-key.pem ${HELM_HOME}/key.pem