Kamal + Grover::JavaScript::TimeoutError

Question

我使用 Kamal 部署 Sinatra Web 应用程序，并在其中使用 Grover 处理 pdf。我遇到的问题是，当我访问 https://myserver.com/pdf3 时，出现以下错误；

Grover::JavaScript::TimeoutError at /pdf3
Navigation timeout of 30000 ms exceeded

这是我的路线，

get "/up" do 
  "UP"
end

get '/pdf2' do          # Works
  grover = Grover.new("https://www.google.com")
  content_type 'application/pdf'
  attachment 'output.pdf'
  grover.to_pdf
end

get '/pdf3' do          # Timeout error
  grover = Grover.new("https://myserver.com/up")
  content_type 'application/pdf'
  attachment 'output.pdf'
  grover.to_pdf
end

如果我调用 http://myserver.com/pdf2 那么 grover 就会工作并将谷歌网站放入 PDF 中并将其发送到我的浏览器。我希望能够调用自身，但它似乎在超时时挂起该进程和所有其他进程。

我还使用具有以下设置的 nginx 代理；

server {
    server_name myserver.com;
    limit_rate 50k;
    access_log off;

    location / {
        proxy_pass http://127.0.0.1:8081;
    }
}

我的 Dockerfile

# syntax = docker/dockerfile:1

# Make sure RUBY_VERSION matches the Ruby version in .ruby-version and Gemfile
ARG RUBY_VERSION=2.7.8
FROM ruby:$RUBY_VERSION-slim as base

# Rails app lives here
WORKDIR /sinatra

RUN apt-get update -qq && \
    apt-get install --no-install-recommends -y build-essential ruby-dev libmagick++-dev curl \
    ssh software-properties-common npm  

RUN npm install npm@latest -g && \
    npm install n -g && \
    n latest

RUN apt-get install -y wget
RUN wget -q https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
RUN apt-get install -y ./google-chrome-stable_current_amd64.deb

COPY . /sinatra
RUN bundle install
RUN npm install

ENV GROVER_NO_SANDBOX="true"
ENV DISABLE_JEMALLOC="true"
# ENV RACK_ENV="production"

EXPOSE 4567

CMD ["bundle", "exec", "rackup", "--host", "0.0.0.0", "-p", "4567"]

我的deploy.yml

# Name of your application. Used to uniquely configure containers.
service: myserver

# Share the users directory for SSH key use
volumes:
  - "/home/map7:/home/map7"
    
# Name of the container image.
image: map7/myserver

# Deploy to these servers.
servers:
  - 11.111.111.111

# Credentials for your image host.
registry:
  # Specify the registry server, if you're not using Docker Hub
  # server: registry.digitalocean.com / ghcr.io / ...
  username: myuser

  # Always use an access token rather than real password when possible.
  password:
    - KAMAL_REGISTRY_PASSWORD

# Inject ENV variables into containers (secrets come from .env).
# Remember to run `kamal env push` after making changes!
env:
  secret:
    - REPORTS_USER
    - REPORTS_PASS

# Configure builder setup.
builder:
  multiarch: false

# Configure custom arguments for Traefik. Be sure to reboot traefik when you modify it.
traefik:
  host_port: "127.0.0.1:8081"
  options:
    cpus: 2    


# Configure a custom healthcheck (default is /up on port 3000)
healthcheck:
  path: /healthz
  port: 4567

就像一次只有一个进程在运行，并且通过路由 /pdf3 我正在调用嵌套在其中的同一服务器。我该如何解决这个问题？

Answer 1

我设法通过从默认的“瘦”服务器切换为使用“puma”来解决此问题。

1. 添加 puma GEM

2. Dockerfile：切换到 puma

   CMD ["bundle", "exec", "puma", "-b", "tcp://0.0.0.0", "-p", "4567"]

3. 承诺

4. 部署

   kamal deploy

Thin 一次仅接受一个连接，而 puma 默认情况下允许多个连接。