标签：config rsa mes clust bec fss ges ini 一个
kubernetes 集群之间的通信需要加密，可以使用自签 TLS 证书。具体证书如下：
| 组件 | 使用的证书 |
| etcd | ca.pem, server.pem, server-key.pem |
| kube-apiserver | ca.pem, server.pem, server-key.pem |
| kubelet | ca.pem, ca-key.pem |
| kube-proxy | ca.pem, kube-proxy.pem, kube-proxy-key.pem |
| kubectl | ca.pem, admin.pem, admin-key.pem |
1. 下载3个工具
wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
2. 增加执行权限
chmod +x cf*
3. 放到 /usr/local/bin 目录，并重命名。
cp cfssl-certinfo_linux-amd64 /usr/local/bin/cfssl-certinfo
cp cfssljson_linux-amd64 /usr/local/bin/cfssljson
cp cfssl_linux-amd64 /usr/local/bin/cfssl
4. 用下面的命令，可以导出默认配置
cfssl print-defaults config > config.json
cfssl print-defaults csr > csr.json
5. 创建一个文件 certification.sh，用于生成 kubernetes 中用到的自签证书。内容如下：
#!/bin/bash cat > ca-config.json <<EOF { "signing": { "default":{ "expiry": "87600h" }, "profiles": { "kubernetes": { "expiry": "87600h", "usages": [ "signing", "key encipherment", "server auth", "client auth" ] } } } } EOF cat > ca-csr.json <<EOF { "CN": "kubernetes", "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "Beijing", "ST": "Beijing", "O": "k8s", "OU": "System" } ] } EOF cfssl gencert -initca ca-csr.json | cfssljson -bare ca - #------------------- cat > server-csr.json <<EOF { "CN": "kubernetes", "hosts": [ "127.0.0.1", "192.168.137.81", "192.168.137.82", "192.168.137.83","kubernetes", "kubernetes.default", "kubernetes.default.svc", "kubernetes.default.svc.cluster", "kubernetes.default.svc.cluster.local" ], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "Beijing", "ST": "Beijing", "O": "k8s", "OU": "System" } ] } EOF cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server #---------------- cat > admin-csr.json <<EOF { "CN": "admin", "hosts": [], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "Beijing", "ST": "Beijing", "O": "System:masters", "OU": "System" } ] } EOF cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin #--------- cat > kube-proxy-csr.json <<EOF { "CN": "system:kube-proxy", "hosts": [], "key": { "algo": "rsa", "size": 2048 }, "names": [ { "C": "CN", "L": "Beijing", "ST": "Beijing", "O": "k8s", "OU": "System" } ] } EOF cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
6. 给 certification.sh 增加执行权限后，运行这个脚本，会生成很多文件，其中 *-key.pem 文件是私钥文件，其它以 pem 结尾的文件是公钥文件。
标签：config rsa mes clust bec fss ges ini 一个
原文地址：https://www.cnblogs.com/langfanyun/p/10499462.html
