[show platform summary] Add chassis hardware info to platform summary and version (#1624)

#### What I did
I added chassis model number, serial number, and hardware revision to the commands `show platform summary` and `show version`

#### How I did it
I refactored and modified the existing `get_hw_info_dict()` function to make calls to STATE_DB and get the chassis information populated by sonic-net/sonic-platform-daemons#183 script. 

The new refactored versions of `get_hw_info_dict()` are added here #7652

Author: alexrallen

doc/Command-Reference.md

@@ -441,6 +441,15 @@ This command displays relevant information as the SONiC and Linux kernel version
   Build date: Fri Mar 22 01:55:48 UTC 2019
   Built by: johnar@jenkins-worker-4
 
+  Platform: x86_64-mlnx_msn2700-r0
+  HwSKU: Mellanox-SN2700
+  ASIC: mellanox
+  ASIC Count: 1
+  Serial Number: MT1822K07815
+  Model Number: MSN2700-CS2FO
+  Hardware Rev: A1
+  Uptime: 14:40:15 up 3 min,  1 user,  load average: 1.26, 1.45, 0.66
+
   Docker images:
   REPOSITORY                 TAG                 IMAGE ID            SIZE
   docker-syncd-brcm          HEAD.32-21ea29a     434240daff6e        362MB
@@ -686,9 +695,13 @@ This command displays a summary of the device's hardware platform
 - Example:
   ```
   admin@sonic:~$ show platform summary
-  Platform: x86_64-dell_s6000_s1220-r0
-  HwSKU: Force10-S6000
-  ASIC: broadcom
+  Platform: x86_64-mlnx_msn2700-r0
+  HwSKU: Mellanox-SN2700
+  ASIC: mellanox
+  ASIC Count: 1
+  Serial Number: MT1822K07815
+  Model Number: MSN2700-CS2FO
+  Hardware Rev: A1
   ```
 
 **show platform syseeprom**

show/main.py

@@ -8,7 +8,7 @@
 import utilities_common.cli as clicommon
 import utilities_common.multi_asic as multi_asic_util
 from natsort import natsorted
-from sonic_py_common import device_info, multi_asic
+from sonic_py_common import device_info
 from swsscommon.swsscommon import SonicV2Connector, ConfigDBConnector
 from tabulate import tabulate
 from utilities_common import util_base
@@ -956,22 +956,9 @@ def logging(process, lines, follow, verbose):
 def version(verbose):
     """Show version information"""
     version_info = device_info.get_sonic_version_info()
-
-    platform = device_info.get_platform()
-    hwsku = device_info.get_hwsku()
-    asic_type = version_info['asic_type']
-    asic_count = multi_asic.get_num_asics()
-
-    serial_number = None
-    db = SonicV2Connector()
-    db.connect(db.STATE_DB)
-    eeprom_table = db.get_all(db.STATE_DB, 'EEPROM_INFO|0x23')
-    if "Name" in eeprom_table and eeprom_table["Name"] == "Serial Number" and "Value" in eeprom_table:
-        serial_number = eeprom_table["Value"]
-    else:
-        serial_number_cmd = "sudo decode-syseeprom -s"
-        serial_number = subprocess.Popen(serial_number_cmd, shell=True, text=True, stdout=subprocess.PIPE).stdout.read()
-
+    platform_info = device_info.get_platform_info()
+    chassis_info = platform.get_chassis_info()
+    
     sys_uptime_cmd = "uptime"
     sys_uptime = subprocess.Popen(sys_uptime_cmd, shell=True, text=True, stdout=subprocess.PIPE)
 
@@ -981,11 +968,13 @@ def version(verbose):
     click.echo("Build commit: {}".format(version_info['commit_id']))
     click.echo("Build date: {}".format(version_info['build_date']))
     click.echo("Built by: {}".format(version_info['built_by']))
-    click.echo("\nPlatform: {}".format(platform))
-    click.echo("HwSKU: {}".format(hwsku))
-    click.echo("ASIC: {}".format(asic_type))
-    click.echo("ASIC Count: {}".format(asic_count))
-    click.echo("Serial Number: {}".format(serial_number.strip()))
+    click.echo("\nPlatform: {}".format(platform_info['platform']))
+    click.echo("HwSKU: {}".format(platform_info['hwsku']))
+    click.echo("ASIC: {}".format(platform_info['asic_type']))
+    click.echo("ASIC Count: {}".format(platform_info['asic_count']))
+    click.echo("Serial Number: {}".format(chassis_info['serial']))
+    click.echo("Model Number: {}".format(chassis_info['model']))
+    click.echo("Hardware Revision: {}".format(chassis_info['revision']))
     click.echo("Uptime: {}".format(sys_uptime.stdout.read().strip()))
     click.echo("\nDocker images:")
     cmd = 'sudo docker images --format "table {{.Repository}}\\t{{.Tag}}\\t{{.ID}}\\t{{.Size}}"'

show/platform.py

@@ -4,24 +4,33 @@
 
 import click
 import utilities_common.cli as clicommon
-from sonic_py_common import device_info, multi_asic
+from sonic_py_common import device_info
 
+#
+# Helper functions
+#
 
-def get_hw_info_dict():
+def get_chassis_info():
     """
-    This function is used to get the HW info helper function
+    Attempts to get the chassis info via STATE_DB and falls back to direct Platform API calls.
     """
-    hw_info_dict = {}
 
-    version_info = device_info.get_sonic_version_info()
+    chassis_info = device_info.get_chassis_info()
+    required_keys = ['serial', 'model', 'revision']
+    failed_vals = ['', 'N/A']
+    platform_chassis = None
 
-    hw_info_dict['platform'] = device_info.get_platform()
-    hw_info_dict['hwsku'] = device_info.get_hwsku()
-    hw_info_dict['asic_type'] = version_info['asic_type']
-    hw_info_dict['asic_count'] = multi_asic.get_num_asics()
-
-    return hw_info_dict
+    for k in required_keys:
+        if chassis_info.get(k, '') in failed_vals:
+            if platform_chassis is None:
+                import platform
+                platform_chassis = sonic_platform.platform.Platform().get_chassis()
+            try:
+                chassis_info[k] = getattr(platform_chassis, "get_".format(k))()
+            except AttributeError:
+                chassis_info[k] = 'N/A'
 
+    return chassis_info
 
 #
 # 'platform' group ("show platform ...")
@@ -38,17 +47,19 @@ def platform():
 @click.option('--json', is_flag=True, help="Output in JSON format")
 def summary(json):
     """Show hardware platform information"""
-
-    hw_info_dict = {}
-    hw_info_dict = get_hw_info_dict()
+    platform_info = device_info.get_platform_info()
+    chassis_info = get_chassis_info()
 
     if json:
-        click.echo(clicommon.json_dump(hw_info_dict))
+        click.echo(clicommon.json_dump({**platform_info, **chassis_info}))
     else:
-        click.echo("Platform: {}".format(hw_info_dict['platform']))
-        click.echo("HwSKU: {}".format(hw_info_dict['hwsku']))
-        click.echo("ASIC: {}".format(hw_info_dict['asic_type']))
-        click.echo("ASIC Count: {}".format(hw_info_dict['asic_count']))
+        click.echo("Platform: {}".format(platform_info['platform']))
+        click.echo("HwSKU: {}".format(platform_info['hwsku']))
+        click.echo("ASIC: {}".format(platform_info['asic_type']))
+        click.echo("ASIC Count: {}".format(platform_info['asic_count']))
+        click.echo("Serial Number: {}".format(chassis_info['serial']))
+        click.echo("Model Number: {}".format(chassis_info['model']))
+        click.echo("Hardware Revision: {}".format(chassis_info['revision']))
 
 
 # 'syseeprom' subcommand ("show platform syseeprom")

tests/show_platform_test.py

@@ -26,19 +26,29 @@ class TestShowPlatform(object):
     TEST_PLATFORM = "x86_64-mlnx_msn2700-r0"
     TEST_HWSKU = "Mellanox-SN2700"
     TEST_ASIC_TYPE = "mellanox"
+    TEST_ASIC_COUNT = 1
+    TEST_SERIAL = "MT1822K07815"
+    TEST_MODEL = "MSN2700-CS2FO"
+    TEST_REV = "A1"
 
     # Test 'show platform summary'
     def test_summary(self):
         expected_output = """\
             Platform: {}
             HwSKU: {}
             ASIC: {}
-            """.format(self.TEST_PLATFORM, self.TEST_HWSKU, self.TEST_ASIC_TYPE)
-
-        with mock.patch("show.platform.get_hw_info_dict",
-                        return_value={"platform": self.TEST_PLATFORM, "hwsku": self.TEST_HWSKU, "asic_type": self.TEST_ASIC_TYPE}):
-            result = CliRunner().invoke(show.cli.commands["platform"].commands["summary"], [])
-            assert result.output == textwrap.dedent(expected_output)
+            ASIC Count: {}
+            Serial Number: {}
+            Model Number: {}
+            Hardware Revision: {}
+            """.format(self.TEST_PLATFORM, self.TEST_HWSKU, self.TEST_ASIC_TYPE, self.TEST_ASIC_COUNT, self.TEST_SERIAL, self.TEST_MODEL, self.TEST_REV)
+
+        with mock.patch("sonic_py_common.device_info.get_platform_info",
+                return_value={"platform": self.TEST_PLATFORM, "hwsku": self.TEST_HWSKU, "asic_type": self.TEST_ASIC_TYPE, "asic_count": self.TEST_ASIC_COUNT}):
+            with mock.patch("show.platform.get_chassis_info",
+                            return_value={"serial": self.TEST_SERIAL, "model": self.TEST_MODEL, "revision": self.TEST_REV}):
+                result = CliRunner().invoke(show.cli.commands["platform"].commands["summary"], [])
+                assert result.output == textwrap.dedent(expected_output)
 
 
 class TestShowPlatformPsu(object):