X-Git-Url: https://iankelling.org/git/?p=buildscripts;a=blobdiff_plain;f=prom-node-exporter;fp=prom-node-exporter;h=4263b3e44e18790731349d31a256b8eb5df56fa0;hp=0000000000000000000000000000000000000000;hb=6d5364acaf732814110b7ab98ef1d266276f64ee;hpb=f22fdf4a151ff0dcbbf1902977559eebe18613ea

diff --git a/prom-node-exporter b/prom-node-exporter
new file mode 100755
index 0000000..4263b3e
--- /dev/null
+++ b/prom-node-exporter
@@ -0,0 +1,263 @@
+#!/bin/bash
+
+if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
+shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
+set -eE -o pipefail
+trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
+
+[[ $EUID == 0 ]] || exec sudo -E "${BASH_SOURCE[0]}" "$@"
+
+
+usage() {
+  cat <<EOF
+Usage: ${0##*/} [-d]
+Install prometheus-node-exporter for debian based system with sysv or systemd
+
+-d         Skip downloading and installing the latest binary
+-s         Skip setup: config files, user, init scripts.
+-l         Listen only on local interface.
+-h|--help  Print help and exit.
+
+For downloading, requires curl wget and jq
+
+EOF
+  exit $1
+}
+
+##### begin command line parsing ########
+
+
+# defaults
+dl_bin=true
+do_setup=true
+listen_address=0.0.0.0
+
+while [[ $1 ]]; do
+  case $1 in
+    -d) dl_bin=false ;;
+    -s) do_setup=false ;;
+    -l) listen_address=127.0.0.1 ;;
+    -h|--help) usage 0 ;;
+  esac
+  shift
+done
+readonly dl_bin do_setup
+
+##### end command line parsing ########
+
+if $dl_bin; then
+  for p in curl wget jq; do
+    if ! type -t $p &>/dev/null; then
+      apt-get -y install $p
+    fi
+  done
+fi
+if $do_setup && ! type -t rsync &>/dev/null; then
+  # note: we could use diff or cmp instead.
+  apt-get -y install rsync
+fi
+
+sysd_reload=false
+installed_file=false
+
+i() { # install file
+  local tmp tmpdir dest="$1"
+  local base="${dest##*/}"
+  local dir="${dest%/*}"
+  if [[ $dir != "$base" ]]; then
+    # dest has a directory component
+    mkdir -p "$dir"
+  fi
+  tmpdir=$(mktemp -d)
+  cat >$tmpdir/"$base"
+  tmp=$(rsync -ic $tmpdir/"$base" "$dest")
+  if [[ $tmp ]]; then
+    printf "%s\n" "$tmp"
+    installed_file=true
+    if [[ $dest == /etc/systemd/system/* ]]; then
+      sysd_reload=true
+    fi
+  fi
+  rm -rf $tmpdir
+}
+
+
+if $dl_bin; then
+  if [[ -s /usr/local/src/node-exporter-url ]]; then
+    installed_url=$(cat /usr/local/src/node-exporter-url)
+  fi
+  url=$(curl -s https://api.github.com/repos/prometheus/node_exporter/releases/latest | jq -r '.assets[].browser_download_url | match(".*linux-amd64.tar.gz$").string')
+  if [[ ! $url ]]; then
+    echo $0: error failed to get url
+    exit 1
+  fi
+  if [[ $url != "$installed_url" ]]; then
+    tmpdir=$(mktemp -d)
+    cd $tmpdir
+    f=${url##*/}
+    wget -nv $url
+    tar -xf $f
+    dir=${f%.tar.gz}
+    install $dir/node_exporter /usr/local/bin/prometheus-node-exporter
+    printf "%s\n" "$url" >/usr/local/src/node-exporter-url
+    cd
+    rm -rf $tmpdir
+  fi
+fi
+
+if ! $do_setup; then
+  exit 0
+fi
+
+# taken from postinstall script
+if ! getent passwd prometheus &>/dev/null; then
+  adduser --quiet --system --home /var/lib/prometheus --no-create-home \
+          --group --gecos "Prometheus daemon" prometheus
+fi
+
+
+# textfile collector dir
+mkdir -p /var/lib/prometheus/node-exporter
+
+chown prometheus:prometheus /var/lib/prometheus
+
+
+i /etc/default/prometheus-node-exporter <<EOF
+# Set the command-line arguments to pass to the server.
+# Due to shell scaping, to pass backslashes for regexes, you need to double
+# them (\\d for \d). If running under systemd, you need to double them again
+# (\\\\d to mean \d), and escape newlines too.
+ARGS="--web.listen-address=${listen_address}:9100"
+# to see all possible args, run with --help
+EOF
+
+if [[ -d /etc/systemd/system ]]; then # we are using systemd
+  if [[ -e /lib/systemd/system/prometheus-node-exporter.service ]]; then
+    i /etc/systemd/system/prometheus.service.d/override.conf <<'EOF'
+[Unit]
+# needed to continually restart
+StartLimitIntervalSec=0
+
+[Service]
+Restart=always
+# time to sleep before restarting a service
+RestartSec=600
+
+# empty signifies to replace the existing value
+ExecStart=
+ExecStart=/usr/local/bin/prometheus $ARGS
+EOF
+  else # we dont have the distro package installed
+    i /etc/systemd/system/prometheus.service <<'EOF'
+[Unit]
+Description=Prometheus exporter for machine metrics
+Documentation=https://github.com/prometheus/node_exporter
+
+# addition to the distro package
+StartLimitIntervalSec=0
+
+
+[Service]
+Restart=on-failure
+User=prometheus
+EnvironmentFile=/etc/default/prometheus-node-exporter
+ExecStart=/usr/local/bin/prometheus-node-exporter $ARGS
+ExecReload=/bin/kill -HUP $MAINPID
+TimeoutStopSec=20s
+SendSIGKILL=no
+
+# additions to the distro package
+Restart=always
+RestartSec=600
+
+
+[Install]
+WantedBy=multi-user.target
+EOF
+  fi
+  if $sysd_reload; then
+    systemctl daemon-reload
+  fi
+  systemctl enable prometheus-node-exporter
+  if $installed_file; then
+    systemctl restart prometheus-node-exporter
+  fi
+else # not using systemd
+  i /etc/init.d/prometheus-node-exporter <<'EOF'
+#!/bin/sh
+# kFreeBSD do not accept scripts as interpreters, using #!/bin/sh and sourcing.
+if [ true != "$INIT_D_SCRIPT_SOURCED" ] ; then
+    set "$0" "$@"; INIT_D_SCRIPT_SOURCED=true . /lib/init/init-d-script
+fi
+### BEGIN INIT INFO
+# Provides:          prometheus-node-exporter
+# Required-Start:    $remote_fs
+# Required-Stop:     $remote_fs
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: Prometheus exporter for machine metrics
+# Description:       Prometheus exporter for machine metrics, written in Go
+#                    with pluggable metric collectors.
+### END INIT INFO
+
+# Author: Martina Ferrari <tina@debian.org>
+# Author: Guillem Jover <gjover@sipwise.com>
+
+DESC="Prometheus exporter for machine metrics"
+NAME=prometheus-node-exporter
+USER=prometheus
+GROUP=$USER
+DAEMON=/usr/bin/$NAME
+PIDFILE=/run/prometheus/$NAME.pid
+LOGFILE=/var/log/prometheus/$NAME.log
+
+START_ARGS="--no-close --background --make-pidfile"
+STOP_ARGS="--remove-pidfile"
+
+do_start_prepare()
+{
+  mkdir -p $(dirname $PIDFILE)
+}
+
+do_start_cmd_override()
+{
+  start-stop-daemon --start --quiet --oknodo \
+    --exec $DAEMON --pidfile $PIDFILE --user $USER --group $GROUP \
+    --chuid $USER:$GROUP $START_ARGS -- $ARGS >>$LOGFILE 2>&1
+}
+
+do_stop_cmd_override()
+{
+  start-stop-daemon --stop --quiet --oknodo --retry=TERM/30/KILL/5 \
+    --exec $DAEMON --pidfile $PIDFILE --user $USER $STOP_ARGS
+}
+
+alias do_reload=do_reload_sigusr1
+EOF
+  chmod +x /etc/init.d/prometheus-node-exporter
+
+  mkdir -p /var/log/prometheus
+  chown prometheus:prometheus /var/log/prometheus
+  update-rc.d prometheus-node-exporter defaults
+
+  running=false
+  if type -t pgrep &>/dev/null && pgrep -f prometheus-node-exporter &>/dev/null; then
+    running=true
+  fi
+  if $installed_file || ! $running; then
+    /etc/init.d/prometheus-node-exporter restart
+  fi
+
+  i /etc/logrotate.d/prometheus-node-exporter <<'EOF'
+/var/log/prometheus/prometheus-node-exporter.log {
+    weekly
+    rotate 10
+    copytruncate
+    compress
+    delaycompress
+    notifempty
+    missingok
+}
+EOF
+
+fi