32 lines
801 B
Docker
Executable File
32 lines
801 B
Docker
Executable File
FROM alpine:latest
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ENV TZ "UTC"
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ENV SCHEDULE="* * * * *"
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## Configure runtime variables for nsupdate
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ENV NSUPDATE_CONFD_DIR="/config"
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ENV NSUPDATE_LOG_DIR="/log"
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## Install requirements
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RUN apk update
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RUN apk add --no-cache git curl libxml2-utils tzdata jq
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# Read timezone from server, so in docker-compose you can change TZ
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RUN ln -sf "/usr/share/zoneinfo/${TZ}" /etc/localtime && \
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echo "${TZ}" > /etc/timezone && date
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# Cache Bust upon new commits
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ADD https://api.github.com/repos/chrisb86/nsupdate/git/refs/heads/main /.git-hashref
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COPY nsupdate.sh /usr/local/bin/nsupdate.sh
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RUN chmod +x /usr/local/bin/nsupdate.sh
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## Setup cron job
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RUN echo "${SCHEDULE} sh /usr/local/bin/nsupdate.sh" >> /etc/crontabs/root
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## Start crond
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CMD [ "crond", "-l", "2", "-f" ]
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VOLUME /config
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VOLUME /log
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