Kubernetes Https证书转换方法

证书创建方法

   

mkdir /etc/kubernetes/ssl
cd /etc/kubernetes/ssl
openssl genrsa -out ca-key.pem 2048
openssl req -x509 -new -nodes -key ca-key.pem -days 10000 -out ca.pem -subj "/CN=kube-ca"
cat >> openssl.cnf << EOF
[req]
req_extensions = v3_req
distinguished_name = req_distinguished_name
[req_distinguished_name]
[ v3_req ]
basicConstraints = CA:FALSE
keyUsage = nonRepudiation, digitalSignature, keyEncipherment
subjectAltName = @alt_names
[alt_names]
DNS = dashboard.yiwu.com
IP.1 = 10.254.0.1 #k8s 集群service ip
IP.2 = 192.168.23.128
EOF
openssl genrsa -out ingress-key.pem 2048
openssl req -new -key ingress-key.pem -out ingress.csr -subj "/CN=dashboard.yiwu.com" -config openssl.cnf
openssl x509 -req -in ingress.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out ingress.pem -days 365 -extensions v3_req -extfile openssl.cnf
kubectl create secret tls ingress-secret --key ingress-key.pem --cert ingress.pem -n kube-system
kubectl create -f /opt/docker/conf/dashboard/dashboard-ingress-tls.yaml

dashboard-ingress.yaml

   

   

pem文件转cer文件

用命令行执行下面的命令：

1.把PEM转成PKCS12格式

1	openssl pkcs12 -export -out cacert.p12 -in cacert.pem

2. 把PKCS 转成crt

1	openssl pkcs12 -in cacert.p12 -out mycerts.crt -nokeys -clcerts

3.把crt转成cer

1	openssl x509 -inform pem -in mycerts.crt -outform der -out mycerts.cer