[svc]logstash和filebeat之间ssl加密-优快云博客

本文介绍如何使用CFSSL生成证书，并详细展示了如何为Logstash和Filebeat配置SSL加密通信，包括解决证书验证问题。

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cfssl生成证书

wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -O     /usr/local/bin/cfssl
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -O      /usr/local/bin/cfssljson
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -O /usr/local/bin/cfssl-certinfo
chmod +x /usr/local/bin/cfssl*


cd;mkdir keys;cd keys
cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "8760h"
    },
    "profiles": {
      "app": {
        "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ],
        "expiry": "8760h"
      }
    }
  }
}
EOF


cat > ca-csr.json <<EOF
{
  "CN": "k8s",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "BeiJing",
      "L": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF


cfssl gencert -initca ca-csr.json | cfssljson -bare ca



cd /root/keys
cat > app-csr.json <<EOF
{
  "CN": "app",
  "hosts": [
    "127.0.0.1",
    "192.168.1.11",
    "192.168.1.12"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "BeiJing",
      "L": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

cfssl gencert -ca=/root/keys/ca.pem \
  -ca-key=/root/keys/ca-key.pem \
  -config=/root/keys/ca-config.json \
  -profile=app app-csr.json | cfssljson -bare app

openssl x509  -noout -text -in  app.pem

可以看到san里包含了n1 和 n2的ip. 这里计划logstash(的ip)和filebeat(的ip)使用同一套证书

实验环境

logstash&filebeat之间传数据-明文

logstash配置

cat > pipeline.conf <<EOF
input {
  beats {
    port => 5044
  }
  
  stdin {
    codec => "json"
  }
}

output {
  stdout { codec => rubydebug }
}
EOF

bin/logstash -f pipeline.conf --config.reload.automatic

filebeat多输入(不能多输出)参考: https://www.elastic.co/guide/en/beats/filebeat/current/migration-configuration.html

cat > filebeat.yml <<EOF
filebeat.prospectors:
- type: log
  enabled: true
  paths:
    - /tmp/ma.txt
- type: stdin
  
output.logstash:
  hosts: ["192.168.1.11:5044"]
# output.console:
#  pretty: true
EOF


./filebeat -e -c filebeat.yml -d "publish"

测试文字

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wireshark抓包: 不加密的时候,可以看到这玩意依稀可以看到依稀传输内容,如果互联网传输的话会有隐患.

logstash&filebeat之间传数据-ssl加密

logstash配置ssl

参考: https://www.elastic.co/guide/en/beats/filebeat/current/configuring-ssl-logstash.html

cat > pipeline.conf <<EOF
input {
  beats {
    port => 5044
    ssl => true
    ssl_certificate_authorities => ["/root/keys/ca.pem"]
    ssl_certificate => "/root/keys/app.pem"
    ssl_key => "/root/keys/app-key.pem"
    ssl_verify_mode => "force_peer"
  }
  
  stdin {
    codec => "json"
  }
}

output {
  stdout { codec => rubydebug }
}
EOF


bin/logstash -f pipeline.conf --config.reload.automatic

filebeat配置ssl

filebeat.prospectors:
- type: log
  enabled: true
  paths:
    - /tmp/ma.txt
    
output.logstash:
  hosts: ["192.168.1.12:5043"]

output.logstash.ssl.certificate_authorities: ["/root/keys/ca.pem"]
output.logstash.ssl.certificate: "/root/keys/app.pem"
output.logstash.ssl.key: "/root/keys/app-key.pem"


output.console:
  pretty: true

  
./filebeat -e -c filebeat.yml -d "publish"

wireshark抓包: 看不到任何传输内容,依稀看到证书的subject(公开的).

报错doesn't contain any IP SANs

2017/12/24 02:33:59.242540 output.go:74: ERR Failed to connect: x509: cannot validate certificate for 192.168.1.11 because it doesn't contain any IP SANs
2017/12/24 02:34:15.289558 output.go:74: ERR Failed to connect: x509: cannot validate certificate for 192.168.1.11 because it doesn't contain any IP SANs

ssl验证流程:

报错原因: 我生成证书请求的时候 hosts字段(即san)为空.

cd /root/keys
cat > app-csr.json <<EOF
{
  "CN": "192.168.1.12",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "BeiJing",
      "L": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

cfssl gencert -ca=/root/keys/ca.pem \
  -ca-key=/root/keys/ca-key.pem \
  -config=/root/keys/ca-config.json \
  -profile=app app-csr.json | cfssljson -bare app

openssl x509  -noout -text -in  app.pem