[英]AWS SageMaker Pipeline Model endpoint deployment failing
我想部署一个具有 2 个容器的 Sagemaker Pipeline Model。 我指的是这个:链接: https://sagemaker.readthedocs.io/en/stable/api/inference/pipeline.html 。
第一个容器将包含图像预处理代码,第二个容器将包含 model 推理代码。 我已将两个容器的 docker 文件更新为具有以下行:
# Set a docker label to enable container to use SAGEMAKER_BIND_TO_PORT environment variable if present
LABEL com.amazonaws.sagemaker.capabilities.accept-bind-to-port=true
我通过使用单个容器部署正常端点来分别测试了 2 个容器。 两个端点都按预期部署和工作。 但是,当我尝试部署管道 model 时,端点未部署并出现以下错误:
UnexpectedStatusException: Error hosting endpoint sagemaker-inference-pipeline-endpoint: Failed.
Reason: The container-1,container-2 for production variant AllTraffic did not pass the ping health check.
Please check CloudWatch logs for this endpoint..
我已经检查了两个容器的 cloudwatch 日志,没有显示与“健康检查”失败相关的错误。 请查看 1 个容器的 cloudwatch 日志(第二个也一样):
Starting the inference server with 2 workers.
[2022-11-20 14:50:44 +0000] [15] [INFO] Starting gunicorn 20.1.0
[2022-11-20 14:50:44 +0000] [15] [INFO] Listening at: unix:/tmp/gunicorn.sock (15)
[2022-11-20 14:50:44 +0000] [15] [INFO] Using worker: sync
[2022-11-20 14:50:44 +0000] [18] [INFO] Booting worker with pid: 18
[2022-11-20 14:50:44 +0000] [19] [INFO] Booting worker with pid: 19
请注意:出于测试目的,现在我还更新了执行以下操作的代码:
请指导我在不知不觉中遗漏了什么或在某处犯了错误。 非常感谢。
我尝试过的事情的总结:
# Set a docker label to enable container to use SAGEMAKER_BIND_TO_PORT environment variable if present
LABEL com.amazonaws.sagemaker.capabilities.accept-bind-to-port=true
更新:我能够解决这个问题
实际问题是端点无法ping通容器。 这是因为,当有多个容器时,每个容器都使用一些动态端口进行通信,端点需要知道每个容器使用哪个端口。 因此,我们需要编写自定义代码,用 ['SAGEMAKER_BIND_TO_PORT'] 环境变量中的值替换 nginx.conf 文件中的端口值 [8080]。
从这个 sagemker 示例中引用了执行上述操作的代码: https://github.com/aws/amazon-sagemaker-examples/tree/main/contrib/inference_pipeline_custom_containers/containers
在服务文件中,使用下面的start_server() function:
def start_server():
print('Starting the inference server with {} workers.'.format(model_server_workers))
# link the log streams to stdout/err so they will be logged to the container logs
subprocess.check_call(['ln', '-sf', '/dev/stdout', '/var/log/nginx/access.log'])
subprocess.check_call(['ln', '-sf', '/dev/stderr', '/var/log/nginx/error.log'])
port = os.environ.get("SAGEMAKER_BIND_TO_PORT", 8080)
print("using port: ", port)
with open("nginx.conf.template") as nginx_template:
template = Template(nginx_template.read())
nginx_conf = open("/opt/program/nginx.conf", "w")
nginx_conf.write(template.substitute(port=port))
nginx_conf.close()
nginx = subprocess.Popen(['nginx', '-c', '/opt/program/nginx.conf'])
gunicorn = subprocess.Popen(['gunicorn',
'--timeout', str(model_server_timeout),
'-k', 'sync',
'-b', 'unix:/tmp/gunicorn.sock',
'-w', str(model_server_workers),
'wsgi:app'])
signal.signal(signal.SIGTERM, lambda a, b: sigterm_handler(nginx.pid, gunicorn.pid))
# If either subprocess exits, so do we.
pids = set([nginx.pid, gunicorn.pid])
while True:
pid, _ = os.wait()
if pid in pids:
break
sigterm_handler(nginx.pid, gunicorn.pid)
print('Inference server exiting')
而不是 nginx.conf 使用 nginx.conf.template 这将反过来创建具有适当端口的 nginx.conf 文件:
worker_processes 1;
daemon off; # Prevent forking
pid /tmp/nginx.pid;
error_log /var/log/nginx/error.log;
events {
# defaults
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
access_log /var/log/nginx/access.log combined;
upstream gunicorn {
server unix:/tmp/gunicorn.sock;
}
server {
listen $port deferred;
client_max_body_size 5m;
keepalive_timeout 5;
proxy_read_timeout 1200s;
location ~ ^/(ping|invocations) {
proxy_set_header X-Forwarded-For $$proxy_add_x_forwarded_for;
proxy_set_header Host $$http_host;
proxy_redirect off;
proxy_pass http://gunicorn;
}
location / {
return 404 "{}";
}
}
}
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