9b96fd7f5f
This commit aims to enable the scheduler and controller-manager to
access the proper {{ kube_api_endpoint }}, instead of the
unauthenticated localhost port. Two aditionnal certs are generated
on master nodes, and kubeconfig files are added for both pods.
113 lines
4.2 KiB
Bash
Executable file
113 lines
4.2 KiB
Bash
Executable file
#!/bin/bash
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# Author: Smana smainklh@gmail.com
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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set -o errexit
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set -o pipefail
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usage()
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{
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cat << EOF
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Create self signed certificates
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Usage : $(basename $0) -f <config> [-d <ssldir>]
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-h | --help : Show this message
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-f | --config : Openssl configuration file
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-d | --ssldir : Directory where the certificates will be installed
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Environmental variables MASTERS and HOSTS should be set to generate keys
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for each host.
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ex :
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MASTERS=node1 HOSTS="node1 node2" $(basename $0) -f openssl.conf -d /srv/ssl
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EOF
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}
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# Options parsing
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while (($#)); do
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case "$1" in
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-h | --help) usage; exit 0;;
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-f | --config) CONFIG=${2}; shift 2;;
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-d | --ssldir) SSLDIR="${2}"; shift 2;;
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*)
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usage
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echo "ERROR : Unknown option"
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exit 3
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;;
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esac
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done
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if [ -z ${CONFIG} ]; then
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echo "ERROR: the openssl configuration file is missing. option -f"
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exit 1
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fi
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if [ -z ${SSLDIR} ]; then
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SSLDIR="/etc/kubernetes/certs"
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fi
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tmpdir=$(mktemp -d /tmp/kubernetes_cacert.XXXXXX)
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trap 'rm -rf "${tmpdir}"' EXIT
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cd "${tmpdir}"
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mkdir -p "${SSLDIR}"
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# Root CA
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if [ -e "$SSLDIR/ca-key.pem" ]; then
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# Reuse existing CA
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cp $SSLDIR/{ca.pem,ca-key.pem} .
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else
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openssl genrsa -out ca-key.pem 2048 > /dev/null 2>&1
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openssl req -x509 -new -nodes -key ca-key.pem -days 10000 -out ca.pem -subj "/CN=kube-ca" > /dev/null 2>&1
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fi
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if [ ! -e "$SSLDIR/ca-key.pem" ]; then
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# kube-apiserver key
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openssl genrsa -out apiserver-key.pem 2048 > /dev/null 2>&1
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openssl req -new -key apiserver-key.pem -out apiserver.csr -subj "/CN=kube-apiserver" -config ${CONFIG} > /dev/null 2>&1
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openssl x509 -req -in apiserver.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out apiserver.pem -days 3650 -extensions v3_req -extfile ${CONFIG} > /dev/null 2>&1
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cat ca.pem >> apiserver.pem
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fi
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if [ -n "$MASTERS" ]; then
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for host in $MASTERS; do
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cn="${host%%.*}"
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# admin key
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openssl genrsa -out admin-${host}-key.pem 2048 > /dev/null 2>&1
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openssl req -new -key admin-${host}-key.pem -out admin-${host}.csr -subj "/CN=kube-admin-${cn}/O=system:masters" > /dev/null 2>&1
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openssl x509 -req -in admin-${host}.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out admin-${host}.pem -days 3650 > /dev/null 2>&1
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# controller-manager key
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openssl genrsa -out controller-manager-${host}-key.pem 2048 > /dev/null 2>&1
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openssl req -new -key controller-manager-${host}-key.pem -out controller-manager-${host}.csr -subj "/CN=kube-controller-manager-${cn}/O=system:kube-controller-manager" > /dev/null 2>&1
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openssl x509 -req -in controller-manager-${host}.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out controller-manager-${host}.pem -days 3650 > /dev/null 2>&1
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# scheduler
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openssl genrsa -out scheduler-${host}-key.pem 2048 > /dev/null 2>&1
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openssl req -new -key scheduler-${host}-key.pem -out scheduler-${host}.csr -subj "/CN=kube-scheduler-${cn}/O=system:kube-scheduler" > /dev/null 2>&1
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openssl x509 -req -in scheduler-${host}.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out scheduler-${host}.pem -days 3650 > /dev/null 2>&1
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done
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fi
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# Nodes and Admin
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if [ -n "$HOSTS" ]; then
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for host in $HOSTS; do
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cn="${host%%.*}"
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# node key
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openssl genrsa -out node-${host}-key.pem 2048 > /dev/null 2>&1
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openssl req -new -key node-${host}-key.pem -out node-${host}.csr -subj "/CN=kube-node-${cn}/O=system:nodes" > /dev/null 2>&1
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openssl x509 -req -in node-${host}.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out node-${host}.pem -days 3650 > /dev/null 2>&1
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done
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fi
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# Install certs
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mv *.pem ${SSLDIR}/
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