Add FreeBSD pipeline.

Signed-off-by: K Rin <rin@sandb0x.tw>

.github/workflows/freebsd-ci.yml

@@ -0,0 +1,36 @@
+name: freebsd-ci
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+permissions:
+  contents: read
+
+env:
+  GO_VERSION: "123"
+
+jobs:
+  test:
+    name: e2e-tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the repository
+        uses: actions/checkout@v4
+
+      - name: Setup FreeBSD
+        uses: vmactions/freebsd-vm@v1
+        with:
+          envs: 'GO_VERSION'
+          usesh: true
+          prepare: |
+            pkg update -f
+            pkg install -y bash curl git gmake go${GO_VERSION} python
+          run: |
+            ln -s /usr/local/bin/bash /usr/bin/bash
+            gmake test-e2e
+            rm -rf "node_exporter/node_exporter/collector/fixtures/proc/self"

Makefile

@@ -28,12 +28,6 @@ MACH                    ?= $(shell uname -m)
 
 STATICCHECK_IGNORE =
 
-ifeq ($(GOHOSTOS), linux)
-	test-e2e := test-e2e
-else
-	test-e2e := skip-test-e2e
-endif
-
 # Use CGO for non-Linux builds.
 ifeq ($(GOOS), linux)
 	PROMU_CONF ?= .promu.yml
@@ -113,15 +107,17 @@ update_fixtures:
 	rm -vf collector/fixtures/udev/.unpacked
 	./ttar -C collector/fixtures -c -f collector/fixtures/udev.ttar udev
 
-
 .PHONY: test-e2e
 test-e2e: build collector/fixtures/sys/.unpacked collector/fixtures/udev/.unpacked
-	@echo ">> running end-to-end tests"
-	./end-to-end-test.sh
-
-.PHONY: skip-test-e2e
-skip-test-e2e:
-	@echo ">> SKIP running end-to-end tests on $(GOHOSTOS)"
+	if [ "$(GOHOSTOS)" = "linux"  ]; then \
+		./end-to-end-test.sh; \
+	elif [ "$(GOHOSTOS)" = "freebsd"  ]; then \
+		./end-to-end-test-freebsd.sh; \
+	fi
+
+# .PHONY: skip-test-e2e
+# skip-test-e2e:
+# 	@echo ">> SKIP running end-to-end tests on $(GOHOSTOS)"
 
 .PHONY: checkmetrics
 checkmetrics: $(PROMTOOL)

collector/fixtures/e2e-output-freebsd.txt

@@ -0,0 +1 @@
+

end-to-end-test-freebsd.sh

@@ -0,0 +1,131 @@
+#!/usr/local/bin/bash
+
+set -euf -o pipefail
+
+enabled_collectors=$(cat << COLLECTORS
+  cpu
+  meminfo
+  netdev
+  textfile
+  zfs
+COLLECTORS
+)
+disabled_collectors=$(cat << COLLECTORS
+  filesystem
+  uname
+COLLECTORS
+)
+cd "$(dirname $0)"
+
+port="$((10000 + (RANDOM % 10000)))"
+tmpdir=$(mktemp -d /tmp/node_exporter_e2e_test.XXXXXX)
+
+skip_re="^(go_|node_exporter_build_info|node_scrape_collector_duration_seconds|process_|node_textfile_mtime_seconds|node_time_(zone|seconds)|node_network_(receive|transmit)_(bytes|packets)_total)"
+
+arch="$(uname -m)"
+
+fixture='collector/fictures/e2e-output-freebsd.txt';
+
+# Only test CPU info collection on x86_64.
+case "${arch}" in
+  x86_64)
+    cpu_info_collector='--collector.cpu.info'
+    cpu_info_bugs='^(cpu_meltdown|spectre_.*|mds)$'
+    cpu_info_flags='^(aes|avx.?|constant_tsc)$'
+    ;;
+  *)
+    cpu_info_collector='--no-collector.cpu.info'
+    cpu_info_bugs=''
+    cpu_info_flags=''
+    ;;
+esac
+
+keep=0; update=0; verbose=0
+while getopts 'hkuv' opt
+do
+  case "$opt" in
+    k)
+      keep=1
+      ;;
+    u)
+      update=1
+      ;;
+    v)
+      verbose=1
+      set -x
+      ;;
+    *)
+      echo "Usage: $0 [-k] [-u] [-v]"
+      echo "  -k: keep temporary files and leave node_exporter running"
+      echo "  -u: update fixture"
+      echo "  -v: verbose output"
+      exit 1
+      ;;
+  esac
+done
+
+if [ ! -x ./node_exporter ]
+then
+    echo './node_exporter not found. Consider running `go build` first.' >&2
+    exit 1
+fi
+
+./node_exporter \
+  --path.rootfs="collector/fixtures" \
+  --path.procfs="collector/fixtures/proc" \
+  --path.sysfs="collector/fixtures/sys" \
+  --path.udev.data="collector/fixtures/udev/data" \
+  $(for c in ${enabled_collectors}; do echo --collector.${c}  ; done) \
+  $(for c in ${disabled_collectors}; do echo --no-collector.${c}  ; done) \
+  --web.listen-address "127.0.0.1:${port}" \
+  --log.level="debug" > "${tmpdir}/node_exporter.log" 2>&1 &
+
+echo $! > "${tmpdir}/node_exporter.pid"
+
+finish() {
+  if [ $? -ne 0 -o ${verbose} -ne 0 ]
+  then
+    cat << EOF >&2
+LOG =====================
+$(cat "${tmpdir}/node_exporter.log")
+=========================
+EOF
+  fi
+
+  if [ ${update} -ne 0 ]
+  then
+    cp "${tmpdir}/e2e-output.txt" "${fixture}"
+  fi
+
+  if [ ${keep} -eq 0 ]
+  then
+    kill -9 "$(cat ${tmpdir}/node_exporter.pid)"
+    # This silences the "Killed" message
+    set +e
+    wait "$(cat ${tmpdir}/node_exporter.pid)" > /dev/null 2>&1
+    rm -rf "${tmpdir}"
+  fi
+}
+
+trap finish EXIT
+
+get() {
+  if command -v curl > /dev/null 2>&1
+  then
+    curl -s -f "$@"
+  elif command -v wget > /dev/null 2>&1
+  then
+    wget -O - "$@"
+  else
+    echo "Neither curl nor wget found"
+    exit 1
+  fi
+}
+
+sleep 1
+
+get "127.0.0.1:${port}/metrics" | grep -E -v "${skip_re}" > "${tmpdir}/e2e-output.txt"
+
+# diff -u \
+#   "${fixture}" \
+#   "${tmpdir}/e2e-output.txt"