fix(striker-ui-api): add get anvil memory summary WIP

striker-ui-api/src/lib/consts/NODE_AND_DR_RESERVED_MEMORY_SIZE.ts

@@ -1,4 +1,2 @@
 // Unit: bytes
-const NODE_AND_DR_RESERVED_MEMORY_SIZE = 8589934592;
-
-export default NODE_AND_DR_RESERVED_MEMORY_SIZE;
+export const NODE_AND_DR_RESERVED_MEMORY_SIZE = 8589934592;

striker-ui-api/src/lib/consts/index.ts

@@ -5,6 +5,9 @@ export { SERVER_PATHS };
 export * from './AN_VARIABLE_NAME_LIST';
 export * from './DELETED';
 export * from './EXIT_CODE_LIST';
+export * from './LOCAL';
+export * from './NODE_AND_DR_RESERVED_MEMORY_SIZE';
+export * from './OS_LIST';
 export * from './PROCESS_OWNER';
 export * from './REG_EXP_PATTERNS';
 export * from './SERVER_PORT';

striker-ui-api/src/lib/request_handlers/anvil/buildQueryAnvilDetail.ts

@@ -1,5 +1,4 @@
-import NODE_AND_DR_RESERVED_MEMORY_SIZE from '../../consts/NODE_AND_DR_RESERVED_MEMORY_SIZE';
-import { OS_LIST } from '../../consts/OS_LIST';
+import { NODE_AND_DR_RESERVED_MEMORY_SIZE, OS_LIST } from '../../consts';
 
 import join from '../../join';
 import { stdoutVar } from '../../shell';

striker-ui-api/src/lib/request_handlers/anvil/getAnvilMemory.ts

@@ -0,0 +1,81 @@
+import { RequestHandler } from 'express';
+
+import { NODE_AND_DR_RESERVED_MEMORY_SIZE } from '../../consts';
+
+import { query } from '../../accessModule';
+import { stderr } from '../../shell';
+
+export const getAnvilMemory: RequestHandler<
+  AnvilDetailParamsDictionary
+> = async (request, response) => {
+  const {
+    params: { anvilUuid },
+  } = request;
+
+  let hostMemoryRows: [
+    hostUuid: string,
+    minMemoryTotal: null | string,
+    hostMemoryTotal: string,
+    hostMemoryFree: string,
+    hostSwapTotal: string,
+    hostSwapFree: string,
+  ][];
+
+  try {
+    hostMemoryRows = await query(
+      `SELECT
+          b.host_uuid,
+          MIN(c.scan_hardware_ram_total) AS min_memory_total,
+          c.scan_hardware_ram_total,
+          c.scan_hardware_memory_free,
+          c.scan_hardware_swap_total,
+          c.scan_hardware_swap_free
+        FROM anvils AS a
+        JOIN hosts AS b
+          ON b.host_uuid IN (
+            a.anvil_node1_host_uuid,
+            a.anvil_node2_host_uuid,
+            a.anvil_dr1_host_uuid
+          )
+        JOIN scan_hardware AS c
+          ON b.host_uuid = c.scan_hardware_host_uuid
+        WHERE a.anvil_uuid = '${anvilUuid}'
+        GROUP BY
+          b.host_uuid,
+          c.scan_hardware_ram_total,
+          c.scan_hardware_memory_free,
+          c.scan_hardware_swap_total,
+          c.scan_hardware_swap_free
+        ORDER BY b.host_name;`,
+    );
+  } catch (error) {
+    stderr(`Failed to get anvil ${anvilUuid} memory info; CAUSE: ${error}`);
+
+    return response.status(500).send();
+  }
+
+  const {
+    0: { 1: rTotal },
+  } = hostMemoryRows;
+
+  if (rTotal === null) return response.status(404).send();
+
+  const total = Number.parseInt(rTotal);
+
+  const hosts: AnvilDetailHostMemory[] =
+    hostMemoryRows.map<AnvilDetailHostMemory>(
+      ([host_uuid, , mtotal, mfree, stotal, sfree]) => ({
+        free: Number.parseInt(mfree),
+        host_uuid,
+        swap_free: Number.parseInt(sfree),
+        swap_total: Number.parseInt(stotal),
+        total: Number.parseInt(mtotal),
+      }),
+    );
+
+  return response.status(200).send({
+    hosts,
+    reserved: NODE_AND_DR_RESERVED_MEMORY_SIZE,
+    total,
+  });
+};

striker-ui-api/src/lib/request_handlers/anvil/index.ts

@@ -1,3 +1,4 @@
 export * from './getAnvil';
 export * from './getAnvilCpu';
 export * from './getAnvilDetail';
+export * from './getAnvilMemory';

striker-ui-api/src/routes/anvil.ts

@@ -4,6 +4,7 @@ import {
   getAnvil,
   getAnvilCpu,
   getAnvilDetail,
+  getAnvilMemory,
 } from '../lib/request_handlers/anvil';
 
 const router = express.Router();
@@ -11,6 +12,7 @@ const router = express.Router();
 router
   .get('/', getAnvil)
   .get('/:anvilUuid/cpu', getAnvilCpu)
+  .get('/:anvilUuid/memory', getAnvilMemory)
   .get('/:anvilUuid', getAnvilDetail);
 
 export default router;

striker-ui-api/src/types/ApiAn.d.ts

@@ -1,3 +1,11 @@
+type AnvilDetailHostMemory = {
+  free: number;
+  host_uuid: string;
+  swap_free: number;
+  swap_total: number;
+  total: number;
+};
+
 type AnvilDetailHostSummary = {
   host_name: string;
   host_uuid: string;