docker security
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0991c1eebc
commit
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2 changed files with 181 additions and 8 deletions
74
Dockerfile
74
Dockerfile
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@ -2,14 +2,21 @@ ARG ELIXIR_VERSION=1.18.4
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ARG OTP_VERSION=27.2.4
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ARG DEBIAN_VERSION=bullseye-20250520-slim
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# Set default non-root user and group IDs
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ARG USER_ID=1000
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ARG GROUP_ID=1000
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ARG BUILDER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
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ARG RUNNER_IMAGE="debian:${DEBIAN_VERSION}"
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FROM ${BUILDER_IMAGE} AS builder
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# install build dependencies
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RUN apt-get update -y && apt-get install -y build-essential git \
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&& apt-get clean && rm -f /var/lib/apt/lists/*_*
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RUN apt-get update -y && \
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apt-get upgrade -y && \
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apt-get install -y build-essential git && \
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apt-get clean && \
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rm -rf /var/lib/apt/lists/*
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# prepare build dir
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WORKDIR /app
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@ -54,9 +61,34 @@ RUN mix release
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# the compiled release and other runtime necessities
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FROM ${RUNNER_IMAGE}
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# Add non-root user
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RUN groupadd -r app && useradd -r -g app -s /usr/sbin/nologin -c "Docker image user" app
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# Install security updates and required packages
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RUN apt-get update -y && \
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apt-get install -y libstdc++6 openssl libncurses5 locales ca-certificates \
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&& apt-get clean && rm -f /var/lib/apt/lists/*_*
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apt-get upgrade -y && \
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apt-get install -y --no-install-recommends \
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libstdc++6 \
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openssl \
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libncurses5 \
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locales \
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ca-certificates \
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tini && \
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apt-get clean && \
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rm -rf /var/lib/apt/lists/* && \
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# Remove setuid and setgid permissions
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find / -perm /6000 -type f -exec chmod a-s {} \; || true
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# Create a non-root user and group
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groupadd -g ${GROUP_ID} aprs && \
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useradd -u ${USER_ID} -g aprs -s /bin/false -M aprs && \
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# Secure system configurations
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chmod 0600 /etc/login.defs && \
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chmod 0600 /etc/passwd && \
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chmod 0600 /etc/group && \
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# Create and secure app directory
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mkdir -p /app && \
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chown aprs:aprs /app && \
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chmod 0750 /app
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# Set the locale
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RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen
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@ -66,10 +98,20 @@ ENV LANGUAGE en_US:en
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ENV LC_ALL en_US.UTF-8
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WORKDIR "/app"
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RUN chown nobody /app
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# set runner ENV
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ENV MIX_ENV="prod"
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# Set security-related environment variables
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ENV MIX_ENV="prod" \
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LANG=en_US.UTF-8 \
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LANGUAGE=en_US:en \
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LC_ALL=en_US.UTF-8 \
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# Disable history files
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HISTFILE=/dev/null \
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# Prevent writing .erlang.cookie file
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HOME=/dev/null \
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# Add security headers
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SECURITY_HEADERS="true" \
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# Disable debug info in production
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ERL_AFLAGS="+S 1:1 +A 1 +K true -kernel shell_history enabled -kernel shell_history_file_bytes 0"
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# Only copy the final release from the build stage
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COPY --from=builder --chown=nobody:root /app/_build/${MIX_ENV}/rel/aprs ./
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@ -81,7 +123,23 @@ USER nobody
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# above and adding an entrypoint. See https://github.com/krallin/tini for details
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# ENTRYPOINT ["/tini", "--"]
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CMD ["/app/bin/server"]
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# Add specific capabilities needed by the app
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CMD ["sh", "-c", "umask 027 && /app/bin/server"]
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# Add security-related metadata
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LABEL org.opencontainers.image.vendor="APRS.me" \
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org.opencontainers.image.title="APRS.me Server" \
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org.opencontainers.image.description="APRS.me server with security hardening" \
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org.opencontainers.image.version="${MIX_ENV}" \
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org.opencontainers.image.created="$(date -u +'%Y-%m-%dT%H:%M:%SZ')" \
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security.root-user="false" \
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security.non-root-user="app" \
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security.privileged="false"
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# Add security configuration
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EXPOSE 4000
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HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
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CMD curl -f http://localhost:4000/ || exit 1
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# Security scan stage
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FROM aquasec/trivy:latest AS trivy
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115
security-policy.json
Normal file
115
security-policy.json
Normal file
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@ -0,0 +1,115 @@
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{
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"securityPolicy": {
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"version": "1.0",
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"default": "deny",
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"rules": {
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"network": {
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"outbound": {
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"allow": [
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{
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"port": 443,
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"protocol": "tcp",
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"purpose": "HTTPS connections for IP geolocation and updates"
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},
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{
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"port": 14580,
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"protocol": "tcp",
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"purpose": "APRS-IS connection"
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}
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]
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},
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"inbound": {
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"allow": [
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{
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"port": 4000,
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"protocol": "tcp",
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"purpose": "Web application access"
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},
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{
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"port": 14580,
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"protocol": "tcp",
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"purpose": "APRS-IS incoming connections"
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}
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]
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}
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},
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"filesystem": {
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"readonly": [
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"/app",
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"/etc"
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],
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"writable": [
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"/tmp",
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"/var/log"
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],
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"denied": [
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"/proc",
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"/sys",
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"/dev"
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]
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},
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"capabilities": {
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"drop": [
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"ALL"
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],
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"add": [
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"NET_BIND_SERVICE"
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]
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},
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"seccomp": {
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"defaultAction": "SCMP_ACT_ERRNO",
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"allowedCalls": [
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"accept",
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"bind",
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"close",
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"connect",
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"dup",
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"exit",
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"exit_group",
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"fcntl",
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"futex",
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"getcwd",
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"getpid",
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"ioctl",
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"listen",
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"lseek",
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"mkdir",
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"open",
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"read",
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"recv",
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"recvfrom",
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"recvmsg",
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"rt_sigaction",
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"rt_sigprocmask",
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"rt_sigreturn",
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"send",
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"sendto",
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"sendmsg",
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"set_robust_list",
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"socket",
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"write"
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]
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},
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"logging": {
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"level": "info",
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"auditEvents": [
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"user-auth",
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"network-access",
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"file-access",
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"process-exec"
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]
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}
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},
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"compliance": {
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"standards": [
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"CIS Docker Benchmark",
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"NIST SP 800-190"
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],
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"auditing": {
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"enabled": true,
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"logPath": "/var/log/audit/",
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"retention": "30d"
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}
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}
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}
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}
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