check_openshift_node_list

#!/bin/bash

set -e -u -o pipefail

. /usr/lib/nagios-plugins-openshift/utils

usage() {
  echo "Usage: $0 -f <path> [--] <node...>"
  echo
  echo 'Compare list of nodes in cluster with names specified on command line.'
  echo
  echo 'Options:'
  echo ' -f   Config file path'
}

opt_cfgfile=

while getopts 'hf:' opt; do
  case "$opt" in
    h)
      usage
      exit 0
      ;;
    f) opt_cfgfile="$OPTARG" ;;
    *)
      usage >&2
      exit 1
      ;;
  esac
done

shift $((OPTIND - 1))

if [[ -z "$opt_cfgfile" || "$#" < 1 ]]; then
  usage >&2
  exit 1
fi

tmpfile=$(mktemp)
trap 'rm -f "$tmpfile"' EXIT

get_node_names() {
  local cfgfile="$1"

  run_oc "$cfgfile" get node \
    --output=jsonpath='{range .items[*]}{.metadata.name}{"\n"}{end}'
}

# Capture stderr in variable and redirect stdout to file
# shellcheck disable=SC2069
if ! msg=$(get_node_names "$opt_cfgfile" 2>&1 >"$tmpfile"); then
  echo "$msg"
  exit "$state_critical"
fi

readarray -t nodes < "$tmpfile"

array_sort nodes ${nodes[@]+"${nodes[@]}"}
array_sort expected ${@+"$@"}

array_uniq nodes ${nodes[@]+"${nodes[@]}"}
array_uniq expected ${expected[@]+"${expected[@]}"}

array_sub missing nodes expected
array_sub unexpected expected nodes

# Expected nodes actually found
array_and found nodes expected

exit_status="$state_ok"
output=()

if [[ -n "${missing[*]+${missing[*]}}" ]]; then
  output+=( "missing: ${missing[*]}" )
  exit_status=$(merge_status "$exit_status" "$state_critical")
fi

if [[ -n "${unexpected[*]+${unexpected[*]}}" ]]; then
  output+=( "unexpected: ${unexpected[*]}" )
  exit_status=$(merge_status "$exit_status" "$state_critical")
fi

if [[ -n "${found[*]+${found[*]}}" ]]; then
  output+=( "found: ${found[*]}" )
fi

# http://docs.icinga.org/latest/en/perfdata.html#perfdata-format
metrics=(
  "'nodecount'=${#nodes[@]};;;0"
  "'missing'=${#missing[@]};;;0"
  "'unexpected'=${#unexpected[@]};;;0;${#nodes[@]}"
  )

finish "$exit_status" \
  "$(join_args ', ' ${output[@]+"${output[@]}"})" \
  "${metrics[*]+${metrics[*]}}"

# vim: set sw=2 sts=2 et :