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Add snmp-exporter image
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‎.github/workflows/ci.yml

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prometheus/blackbox-exporter: 'prometheus/blackbox-exporter/**'
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prometheus/node-exporter: 'prometheus/node-exporter/**'
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prometheus/prometheus: 'prometheus/prometheus/**'
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prometheus/snmp-exporter: 'prometheus/snmp-exporter/**'
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pspace: 'pspace/**'
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pulumi/pulumi-base: 'pulumi/pulumi-base/**'
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pulumi/pulumi-python: 'pulumi/pulumi-python/**'

‎prometheus/snmp-exporter/Containerfile

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# syntax=docker/dockerfile:1
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ARG BASE_IMAGE=docker.io/ubuntu:noble-20250529
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# hadolint ignore=DL3006
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FROM $BASE_IMAGE AS base
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ARG SNMP_EXPORTER_URL_AMD64
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ARG SNMP_EXPORTER_SHA256_AMD64
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ARG SNMP_EXPORTER_URL_ARM64
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ARG SNMP_EXPORTER_SHA256_ARM64
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FROM base AS download
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SHELL ["/bin/bash", "-o", "pipefail", "-c"]
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RUN <<EOF
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apt-get update
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apt-get install -y --no-install-recommends \
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ca-certificates \
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curl
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mkdir -p /tmp/snmp_exporter
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dpkgArch="$(dpkg --print-architecture)"
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case "${dpkgArch##*-}" in \
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amd64) \
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SNMP_EXPORTER_URL="${SNMP_EXPORTER_URL_AMD64}" \
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SNMP_EXPORTER_SHA256="${SNMP_EXPORTER_SHA256_AMD64}" \
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;; \
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arm64) \
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SNMP_EXPORTER_URL="${SNMP_EXPORTER_URL_ARM64}" \
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SNMP_EXPORTER_SHA256="${SNMP_EXPORTER_SHA256_ARM64}" \
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;; \
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*) echo "unsupported architecture"; exit 1 ;; \
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esac
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curl -fsSL -o /tmp/snmp_exporter.tar.gz "${SNMP_EXPORTER_URL}"
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echo "${SNMP_EXPORTER_SHA256} /tmp/snmp_exporter.tar.gz" | sha256sum -c -
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tar xvf /tmp/snmp_exporter.tar.gz -C /tmp/snmp_exporter --strip-components 1
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EOF
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FROM base
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RUN <<EOF
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apt-get update
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DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
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ca-certificates
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rm -rf /var/lib/apt/lists/*
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EOF
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COPY --chmod=755 --from=download /tmp/snmp_exporter/snmp_exporter /usr/local/bin/snmp_exporter
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COPY --from=download /tmp/snmp_exporter/snmp.yml /etc/snmp_exporter/snmp.yml
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EXPOSE 9116
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USER nobody
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ENTRYPOINT [ "/usr/local/bin/snmp_exporter" ]
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CMD ["--config.file=/etc/snmp_exporter/snmp.yml"]

‎prometheus/snmp-exporter/README.md

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snmp_exporter
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-----------------
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This image repackages snmp_exporter releases from
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https://github.com/prometheus/snmp_exporter/releases
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This image is based on https://github.com/prometheus/snmp_exporter/blob/main/Dockerfile
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Image Source: https://github.com/polymathrobotics/oci/tree/main/prometheus/snmp_exporter
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CLI
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---
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```
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% docker run -it --rm docker.io/polymathrobotics/snmp-exporter --help
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usage: snmp_exporter [<flags>]
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Flags:
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-h, --[no-]help Show context-sensitive help (also try
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--help-long and --help-man).
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--[no-]snmp.wrap-large-counters
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Wrap 64-bit counters to avoid floating point
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rounding.
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--snmp.source-address="" Source address to send snmp from in the format
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'address:port' to use when connecting targets.
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If the port parameter is empty or '0', as in
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'127.0.0.1:' or '[::1]:0', a source port number
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is automatically (random) chosen.
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--config.file=snmp.yml ...
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Path to configuration file.
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--[no-]dry-run Only verify configuration is valid and exit.
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--snmp.module-concurrency=1
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The number of modules to fetch concurrently per
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scrape
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--[no-]snmp.debug-packets Include a full debug trace of SNMP packet
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traffics.
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--[no-]config.expand-environment-variables
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Expand environment variables to source secrets
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--web.telemetry-path="/metrics"
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Path under which to expose metrics.
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--[no-]web.systemd-socket Use systemd socket activation listeners instead
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of port listeners (Linux only).
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--web.listen-address=:9116 ...
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Addresses on which to expose metrics and web
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interface. Repeatable for multiple addresses.
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Examples: `:9100` or `[::1]:9100` for http,
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`vsock://:9100` for vsock
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--web.config.file="" Path to configuration file that can
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enable TLS or authentication. See:
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https://github.com/prometheus/exporter-toolkit/blob/master/docs/web-configuration.md
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--log.level=info Only log messages with the given severity or
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above. One of: [debug, info, warn, error]
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--log.format=logfmt Output format of log messages. One of: [logfmt,
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json]
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--[no-]version Show application version.
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```

‎prometheus/snmp-exporter/docker-bake.hcl

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variable "TAG_PREFIX" {
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default = "docker.io/polymathrobotics/snmp-exporter"
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}
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variable "VERSION" {
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default = "0.29.0"
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}
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# There's no darwin-based Docker, so if we're running on macOS, change the platform to linux
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variable "LOCAL_PLATFORM" {
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default = regex_replace("${BAKE_LOCAL_PLATFORM}", "^(darwin)", "linux")
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}
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target "_common" {
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dockerfile = "Containerfile"
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args = {
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SNMP_EXPORTER_URL_AMD64 = "https://github.com/prometheus/snmp_exporter/releases/download/v0.29.0/snmp_exporter-0.29.0.linux-amd64.tar.gz"
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SNMP_EXPORTER_SHA256_AMD64 = "fd7ded886180063a8f77e1ca18cc648e44b318b9c92bcb3867b817d93a5232d6"
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SNMP_EXPORTER_URL_ARM64 = "https://github.com/prometheus/snmp_exporter/releases/download/v0.29.0/snmp_exporter-0.29.0.linux-arm64.tar.gz"
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SNMP_EXPORTER_SHA256_ARM64 = "e590870ad2fcd39ea9c7d722d6e85aa6f1cc9e8671ff3f17feba12a6b5a3b47a"
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}
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tags = [
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"${TAG_PREFIX}:${VERSION}",
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"${TAG_PREFIX}:latest"
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]
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labels = {
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"org.opencontainers.image.source" = "https://github.com/polymathrobotics/oci"
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"org.opencontainers.image.licenses" = "Apache-2.0"
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"org.opencontainers.image.description" = "Prometheus SNMP Exporter"
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"org.opencontainers.image.title" = "${TAG_PREFIX}"
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"org.opencontainers.image.created" = "${timestamp()}"
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"dev.polymathrobotics.image.readme-filepath" = "prometheus/snmp-exporter/README.md"
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}
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}
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target "local" {
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inherits = ["_common"]
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platforms = ["${LOCAL_PLATFORM}"]
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}
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target "default" {
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inherits = ["_common"]
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platforms = ["linux/amd64", "linux/arm64/v8"]
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}

‎prometheus/snmp-exporter/test/controls/snmp_exporter.rb

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describe command('snmp_exporter') do
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it { should exist }
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end
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describe command('snmp_exporter --version') do
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its('exit_status') { should eq 0 }
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its('stderr') { should match(/snmp_exporter, version/) }
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end
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describe file('/etc/snmp_exporter/snmp.yml') do
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it { should exist }
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end

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