[英]rails, whenever and docker - cron tasks doesn't run
來自schedule.rb
我的crontasks在docker容器上不起作用,但crontab -l
結果已包含以下行:
# Begin Whenever generated tasks for: /app/config/schedule.rb
45 19 * * * /bin/bash -l -c 'bundle exec rake stats:cleanup'
45 19 * * * /bin/bash -l -c 'bundle exec rake stats:count'
0 5 * * * /bin/bash -l -c 'bundle exec rake stats:history'
# End Whenever generated tasks for: /app/config/schedule.rb
我可以在容器中手動運行此命令,它可以工作。 似乎cron沒有開始。
Dockerfile:
FROM ruby:2.4.0-slim
RUN apt-get update
RUN apt-get install -qq -y --no-install-recommends build-essential libpq-dev cron postgresql-client
RUN cp /usr/share/zoneinfo/Europe/Moscow /etc/localtime
ENV LANG C.UTF-8
ENV RAILS_ENV production
ENV INSTALL_PATH /app
RUN mkdir $INSTALL_PATH
RUN touch /log/cron.log
ADD Gemfile Gemfile.lock ./
WORKDIR $INSTALL_PATH
RUN bundle install --binstubs --without development test
COPY . .
RUN bundle exec whenever --update-crontab
RUN service cron start
ENTRYPOINT ["bundle", "exec", "puma"]
在Dockerfile中,RUN命令僅在構建映像時執行。
如果你想在啟動容器時啟動cron,你應該在CMD
運行cron
。 我通過刪除RUN service cron start
並更改了ENTRYPOINT
修改了ENTRYPOINT
。
FROM ruby:2.4.0-slim
RUN apt-get update
RUN apt-get install -qq -y --no-install-recommends build-essential libpq-dev cron postgresql-client
RUN cp /usr/share/zoneinfo/Europe/Moscow /etc/localtime
ENV LANG C.UTF-8
ENV RAILS_ENV production
ENV INSTALL_PATH /app
RUN mkdir $INSTALL_PATH
RUN touch /log/cron.log
ADD Gemfile Gemfile.lock ./
WORKDIR $INSTALL_PATH
RUN bundle install --binstubs --without development test
COPY . .
RUN bundle exec whenever --update-crontab
CMD cron && bundle exec puma
減少圖像層數的最佳做法是,例如,您應該始終在同一個RUN語句中將RUN apt-get update與apt-get install結合使用,並在以下后清除apt文件: rm -rf /var/lib/apt/lists/*
FROM ruby:2.4.0-slim
RUN apt-get update && \
apt-get install -qq -y --no-install-recommends build-essential libpq-dev cron postgresql-client \
rm -rf /var/lib/apt/lists/* && \
cp /usr/share/zoneinfo/Europe/Moscow /etc/localtime
ENV LANG C.UTF-8
ENV RAILS_ENV production
ENV INSTALL_PATH /app
RUN mkdir $INSTALL_PATH && \
touch /log/cron.log
ADD Gemfile Gemfile.lock ./
WORKDIR $INSTALL_PATH
RUN bundle install --binstubs --without development test
COPY . .
RUN bundle exec whenever --update-crontab
CMD cron && bundle exec puma
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