[英]Alter docker-compose.yml to add ports with python
def make_file():
read_file = r'C:\Users\~\Desktop\sample.yml'
write_file = r'C:\Users\~\Desktop\sample_out.yml'
f = open(read_file, 'r')
lst = [line for line in f]
f.close()
ports = 'ports:\n'
for index in range(len(lst)):
if "system_frontend:" in lst[index]:
count_spaces = len(lst[index+1]) - len(lst[index+1].lstrip(' '))
lst.insert(index+1, ports)
lst[index+1] = lst[index+1].rjust(count_spaces)
# lst.insert(index+1, " "*count_spaces + ports + " "*count_spaces + "- \"0.0.0.0:5000:80\"\n") ## Did it this way, but it's not the best option.
with open(write_file, 'w', encoding='utf-8') as file:
for line in lst:
file.write(line)
任务是在需要的行中放置一定数量的空格(在 str 'ports:' 之前,所以它看起来像 'ports:')。
来自 .yml 的片段
services:
system_frontend:
image: ${DOCKER_REGISTRY}/frontend:${CONTAINER_VERSION}
logging: *id001
environment:
SSL_CERTIFICATE: ${SSL_CERTIFICATE:-}
SSL_CERTIFICATE_KEY: ${SSL_CERTIFICATE_KEY:-}
ENABLE_CORS: ${ENABLE_CORS:-}
FRONTEND_URL: ${FRONTEND_URL:-}
METRICS_PUSHGATEWAY: ${METRICS_PUSHGATEWAY:-}
volumes:
- ssl-volume:/etc/nginx/ssl
networks:
system_network: null
restart: unless-stopped
depends_on:
- webapi
不能成功。
我猜您正在尝试更改docker-compose.yaml
以添加端口。 有 2 个选项,您可以通过处理文本来做这件事,或者使用yaml.safe_load
来处理内容
这是我对如何做到这一点的看法。 试一试,看看它是否符合您的需求
import yaml
# manually processing text file
def update_port_value_manual(read_file: str, write_file: str, ports: list):
f = open(read_file, 'r')
lst = [line for line in f]
f.close()
for index in range(len(lst)):
if "system_frontend:" in lst[index]:
count_spaces = len(lst[index + 1]) - len(lst[index + 1].lstrip(" "))
inserted_content = count_spaces * " " + "ports:\n"
inserted_content += "".join([f"{' ' * count_spaces}- {host_port}:{container_port}\n"
for host_port, container_port in ports])
lst.insert(index + 1, inserted_content)
break
with open(write_file, 'w', encoding='utf-8') as file:
for line in lst:
file.write(line)
# use yaml for easier processing
def update_port_value_yaml(read_file: str, write_file: str, ports: list):
with open(read_file, "r") as read_yml:
content = yaml.safe_load(read_yml)
content.get("services").get("system_frontend").update(ports=[f"{host_port}:{container_port}"
for host_port, container_port in ports])
with open(write_file, "w") as write_yml:
yaml.dump(content, write_yml)
def main():
read_file = "sample.yml"
write_file = "sample_out.yaml"
ports = [(8081, 8081), (8080, 8080)]
update_port_value_manual(read_file, write_file, ports)
# update_port_value_yaml(read_file, write_file, ports)
我认为这就是您要实现的目标。 您的代码与此代码之间的主要区别是我添加了一个 break 语句,因此在找到目标行后循环不会继续执行操作。
def make_file():
read_file = r'sample.yml'
write_file = r'sample_out.yml'
f = open(read_file, 'r')
lst = [line for line in f]
f.close()
ports = 'ports:\n'
spaces = 0
for index in range(len(lst)):
if "system_frontend:" in lst[index]:
spaces += lst[index+1].count(" ") - 1
break
lst.insert(index + 1, (" "* spaces) + ports)
with open(write_file, 'w', encoding='utf-8') as file:
for line in lst:
file.write(line)
make_file()
请注意,有更好的方法来处理 yaml 文件。 在pyyaml
中查看 pyyaml。
output
services:
system_frontend:
ports:
image: ${DOCKER_REGISTRY}/frontend:${CONTAINER_VERSION}
logging: *id001
environment:
SSL_CERTIFICATE: ${SSL_CERTIFICATE:-}
SSL_CERTIFICATE_KEY: ${SSL_CERTIFICATE_KEY:-}
ENABLE_CORS: ${ENABLE_CORS:-}
FRONTEND_URL: ${FRONTEND_URL:-}
METRICS_PUSHGATEWAY: ${METRICS_PUSHGATEWAY:-}
volumes:
- ssl-volume:/etc/nginx/ssl
networks:
bimeister_network: null
restart: unless-stopped
depends_on:
- webapi
您在循环中插入一行,您应该保留原始行并使用另一个列表来存储输出,这就是我要做的:
def make_file():
read_file = r'sample.yml.txt'
write_file = r'output.yml.txt'
ports = 'ports:\n'
with open(read_file, 'r', encoding='UTF-8') as f, open(write_file, 'w', encoding='utf-8') as o:
while (line := f.readline()):
o.write( line )
if "system_frontend:" in line:
next_line = f.readline()
count_spaces = next_line.count(" ") - 1
next_line = next_line.rjust(count_spaces)
o.write(ports)
o.write(next_line)
make_file()
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