remove python parser for zpool and use json output instead

systems/LoutreOS/monitoring.nix

@@ -63,32 +63,12 @@ in
           };
           exec = [
             {
-              commands = [
-                "${pkgs.python3}/bin/python ${pkgs.writeText "zpool.py" ''
-                  import json
-                  from subprocess import check_output
-
-                  columns = ["NAME", "SIZE", "ALLOC", "FREE", "CKPOINT", "EXPANDSZ", "FRAG", "CAP", "DEDUP", "HEALTH", "ALTROOT"]
-                  health = {'ONLINE':0, 'DEGRADED':11, 'OFFLINE':21, 'UNAVAIL':22, 'FAULTED':23, 'REMOVED':24}
-
-                  stdout = check_output(["${pkgs.zfs}/bin/zpool", "list", "-Hp"],encoding='UTF-8').split('\n')
-                  parsed_stdout = list(map(lambda x: dict(zip(columns,x.split('\t'))), stdout))[:-1]
-
-                  for pool in parsed_stdout:
-                    for item in pool:
-                      if item in ["SIZE", "ALLOC", "FREE", "FRAG", "CAP"]:
-                        pool[item] = int(pool[item])
-                      if item in ["DEDUP"]:
-                        pool[item] = float(pool[item])
-                      if item == "HEALTH":
-                        pool[item] = health[pool[item]]
-
-                  print(json.dumps(parsed_stdout))
-                ''}"
-              ];
-              tag_keys = [ "NAME" ];
-              data_format = "json";
               name_suffix = "_python_zpool";
+              commands = [ "${pkgs.zfs}/bin/zpool list --json --json-int" ];
+              data_format = "json";
+              json_query = "pools.@values.#.{NAME:name,STATE:state,ALLOC:properties.allocated.value,CAP:properties.capacity.value,DEDUP:properties.dedupratio.value,FRAG:properties.fragmentation.value,FREE:properties.free.value,HEALTH:properties.health.value,SIZE:properties.size.value}";
+              json_string_fields = ["STATE", "DEDUP", "HEALTH"];
+              tag_keys = [ "NAME" ];
             }
           ];
         };