Graham McIntire
29b94c09d4
The builder (rust:1.93-alpine) uses Alpine 3.23 but the runtime used Alpine 3.19. The net-snmp-dev headers from 3.23 don't match net-snmp-libs from 3.19, causing a segfault on the first SNMP call. Also adds a SIGSEGV/SIGBUS/SIGABRT signal handler that prints a diagnostic message instead of silently exiting with code 139.
76 lines
2.7 KiB
Docker
76 lines
2.7 KiB
Docker
# syntax=docker/dockerfile:1.4
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# Build stage
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FROM rust:1.93-alpine AS builder
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# Build arguments provided by Docker buildx
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ARG TARGETPLATFORM
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ARG TARGETARCH
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ARG VERSION=0.1.0-unknown
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WORKDIR /app
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# Install build dependencies (net-snmp-dev required for C FFI)
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RUN apk add --no-cache musl-dev protobuf-dev openssl-dev openssl-libs-static net-snmp-dev cmake perl g++
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# Determine Rust target based on platform and add it
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RUN case "$TARGETPLATFORM" in \
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"linux/amd64") RUST_TARGET="x86_64-unknown-linux-musl" ;; \
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"linux/arm64") RUST_TARGET="aarch64-unknown-linux-musl" ;; \
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*) echo "Unsupported platform: $TARGETPLATFORM" && exit 1 ;; \
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esac && \
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echo "$RUST_TARGET" > /tmp/rust-target && \
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rustup target add "$RUST_TARGET"
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# Copy manifests and build files
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COPY Cargo.toml Cargo.lock build.rs ./
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COPY proto ./proto
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COPY native ./native
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# Create a dummy main.rs to build dependencies
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RUN mkdir src && echo "fn main() {}" > src/main.rs
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# Build dependencies (cached layer) with BuildKit cache mounts
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# Cache is separated by target architecture for multi-platform builds
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RUN --mount=type=cache,id=cargo-registry-${TARGETARCH},target=/usr/local/cargo/registry \
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--mount=type=cache,id=cargo-git-${TARGETARCH},target=/usr/local/cargo/git \
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--mount=type=cache,id=cargo-target-${TARGETARCH},target=/app/target \
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RUST_TARGET=$(cat /tmp/rust-target) && \
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BUILD_VERSION="$VERSION" cargo build --release --target "$RUST_TARGET"
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# Remove dummy src
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RUN rm -rf src
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# Copy actual source code
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COPY src ./src
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# Build the actual application with BuildKit cache mounts
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RUN --mount=type=cache,id=cargo-registry-${TARGETARCH},target=/usr/local/cargo/registry \
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--mount=type=cache,id=cargo-git-${TARGETARCH},target=/usr/local/cargo/git \
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--mount=type=cache,id=cargo-target-${TARGETARCH},target=/app/target \
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RUST_TARGET=$(cat /tmp/rust-target) && \
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touch src/main.rs && \
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BUILD_VERSION="$VERSION" cargo build --release --target "$RUST_TARGET" && \
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cp "target/$RUST_TARGET/release/towerops-agent" /tmp/towerops-agent
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# Runtime stage - must match builder's Alpine version for ABI compatibility
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# (rust:1.93-alpine uses Alpine 3.23)
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FROM alpine:3.23
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# Install runtime dependencies
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# iputils provides ping with setuid root (doesn't require CAP_NET_RAW)
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# net-snmp-libs required for C FFI to libnetsnmp
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RUN apk add --no-cache ca-certificates iputils openssl net-snmp-libs
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# Copy binary from builder
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COPY --from=builder /tmp/towerops-agent /usr/local/bin/towerops-agent
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# Create non-root user
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RUN addgroup -g 1000 towerops && \
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adduser -D -u 1000 -G towerops towerops
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# Allow non-root user to overwrite binary during self-update
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RUN chown towerops /usr/local/bin/towerops-agent
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USER towerops
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CMD ["towerops-agent"]
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