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[Dockerfile] Improve docker build caching #144

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Merged
czerwonk merged 1 commit into from
Mar 16, 2026
Merged

[Dockerfile] Improve docker build caching #144

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11 changes: 8 additions & 3 deletions Dockerfile
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Original file line number Diff line number Diff line change
@@ -1,17 +1,22 @@
FROM golang as builder
ADD . /go/ping_exporter/
WORKDIR /go/ping_exporter

# Download go modules and take advantage of docker build cache.
COPY go.mod go.sum ./
RUN go mod download

COPY . .
RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o /go/bin/ping_exporter


FROM alpine:latest
ENV CONFIG_FILE "/config/config.yml"
ENV CMD_FLAGS ""
RUN apk --no-cache add ca-certificates libcap

WORKDIR /app
COPY --from=builder /go/bin/ping_exporter .
RUN apk --no-cache add ca-certificates libcap && \
setcap cap_net_raw+ep /app/ping_exporter
RUN setcap cap_net_raw+ep /app/ping_exporter

CMD ./ping_exporter --config.path $CONFIG_FILE $CMD_FLAGS
EXPOSE 9427