由于在测试环境上用docker部署了多个应用，而且他们的端口有的相同，有的又不相同，数量也比较多，在使用jenkins发版本的时候，不好配置，于是想要写一个脚本，能在docker 容器创建、停止的时候，自动生成nginx反向代理，然后reload nginx
我的原则是尽量简单，轻量，内存占用少
目标很明确，只要能禁用词语到docker的容器启动/停止事件，即可
网上查了一下可以用docker events来禁用词语docker事件，试了一下，发现基本可以满足，于是用python写了一段程序，用来禁用词语docker事件
python
import osimport jsonimport reimport subprocessdef override(path, text):
if not os.path.exists(path) and os.path.exists(path "_temp"):
os.rename(path "_temp",path)
fw = open(path "_temp", 'wb')
fw.write(text)
fw.close() if os.path.exists(path):
os.remove(path)
os.rename(path "_temp", path)def read(path):
try:
fr = open(path, "rb") except IOError: print "The file don't exist, Please double check!"
return
lines = fr.readlines()
ret = ''
for line in lines:
ret = line return retdef read_jsonfile(path):
return json.loads(read(path))def cmd(command):
return os.popen(command).read()def get_name(container):
return cmd("docker inspect -f '{{.Name}}' " container).replace("/", "").replace('\n', '')def get_ip(container):
return cmd("docker inspect -f '{{.NetworkSettings.IPAddress}}' " container).replace('\n', '')def get_port(container):
return cmd("docker inspect -f '{{.Config.ExposedPorts}}' " container).replace('/tcp:{}]', '').replace('map[', '').replace('\n', '')def get_info(container):
filename = "/var/lib/docker/containers/" container "/config.v2.json"
config = read_jsonfile(filename)
name = config['Name'].replace("/", "")
port = config['Config']['ExposedPorts'].keys()[0].replace('/tcp', '')
ip = cmd("docker inspect -f '{{.NetworkSettings.IPAddress}}' " name)
ret = {'name': name, 'port': port, 'ip': ip} return ret
tpl = """
server {
listen 80;
server_name $name.test.com;
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header Host $http_host;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_pass http://$ip:$port;
}
}
"""def generate_conf():
print "generate_conf"
out = cmd("docker ps | grep -v CONTAINER | awk '{print $1}'")
containers = out.split("\n")
servers = ''
hosts = ''
for con in containers: if con != '':
name = get_name(con)
ip = get_ip(con)
port = get_port(con) print ip, port if len(port)
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