验证Kong的DB-less模式的配置更新逻辑

一、安装Kong

sudo yum install -y wget jq
wget https://bintray.com/kong/kong-rpm/rpm -O bintray-kong-kong-rpm.repo
export major_version=`grep -oE '[0-9]+\.[0-9]+' /etc/redhat-release | cut -d "." -f1`
sed -i -e 's/baseurl.*/&\/centos\/'$major_version''/ bintray-kong-kong-rpm.repo
sudo mv bintray-kong-kong-rpm.repo /etc/yum.repos.d/
sudo yum install -y kong

二、安装Httpbin

yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
yum -y install docker-ce
systemctl daemon-reload && systemctl restart docker

docker run -itd -p 80:80 kennethreitz/httpbin

curl http://127.0.0.1:80/ip

三、configure kong

cp /etc/kong/kong.conf.default /etc/kong/kong.conf
sed -i "/^#database/i\database = off" /etc/kong/kong.conf
sed -i "/^#nginx_worker_processes/i\nginx_worker_processes = 1" /etc/kong/kong.conf
sed -i "/^#declarative_config/i\declarative_config = /tmp/apis.yaml" /etc/kong/kong.conf

四、configure routes&services&plugins

cat > /tmp/apis.yaml <<EOF
_format_version: '1.1'

routes:
- name: route-httpbin
  protocols:
  - http
  paths:
  - /httpbin
  strip_path: true
  preserve_host: false
  regex_priority: 1
  service: service-httpbin

services:
- name: service-httpbin
  host: upstream-httpbin
  protocol: http
  port: 80
  connect_timeout: 60000
  read_timeout: 60000
  write_timeout: 60000
  retries: 5

upstreams:
- name: upstream-httpbin
  algorithm: round-robin

targets:
- upstream: upstream-httpbin
  target: 127.0.0.1:80
  weight: 100

plugins:
- config:
    generator: tracker
    header_name: X-Kong-Request-ID
    echo_downstream: true
  name: correlation-id
EOF

五、start Kong

kong start

六、update declarative config file

cat > /tmp/loop_update.sh <<EOF
#!/bin/bash

while true
do
   echo "config:"`date`
   curl -F "config=@/tmp/apis.yaml" http://127.0.0.1:8001/config
done
EOF

chmod +x /tmp/loop_update.sh
/tmp/loop_update.sh

七、open a new terminal and send request

cat > /tmp/loop_request.sh <<EOF
#!/bin/bash

while true
do
   curl  -i http://127.0.0.1:8000/httpbin/ip
done
EOF

chmod +x /tmp/loop_request.sh
/tmp/loop_request.sh

八、after a while, view logs/access.log

cat /usr/local/kong/logs/admin_access.log | wc -l

cat /usr/local/kong/logs/access.log  | grep 200 | wc -l
cat /usr/local/kong/logs/access.log  | grep 404 | wc -l
cat /usr/local/kong/logs/access.log  | grep 503 | wc -l