Add show boot command implementation by Deepak-Pandey · Pull Request #209 · Azure/sonic-gnmi.msft

Deepak-Pandey · 2026-04-25T06:59:03Z

MS ADO: 37689797

Why I did it

Added gNMI getter for show boot so client can fetch platform information via gNMI in JSON format.

How I did it

Wrote function DetectBootLoader() which detects aboot, grub or uboot. then based on that specific class functions are called to fetch current, next, available images.

had to mount /host to telemetry container for this to work.

How to verify it

Did not find any device with boot type as uboot. Tests are for grub and aboot

admin@<machine>:~$ show boot
Current: SONiC-OS-20251110.22
Next: SONiC-OS-20251110.22
Available:
SONiC-OS-20251110.22

root@<machine>:/# gnmi_get -xpath_target SHOW -xpath boot -target_addr <ip> -logtostderr -insecure true
== getRequest:
prefix: <
  target: "SHOW"
>
path: <
  elem: <
    name: "boot"
  >
>
encoding: JSON_IETF

== getResponse:
notification: <
  timestamp: 1777036735937644057
  prefix: <
    target: "SHOW"
  >
  update: <
    path: <
      elem: <
        name: "boot"
      >
    >
    val: <
      json_ietf_val: "{\"current\":\"SONiC-OS-20251110.22\",\"next\":\"SONiC-OS-20251110.22\",\"available\":[\"SONiC-OS-20251110.22\"]}"
    >
  >
>

Output from mellanox device

root@<machine>:/# gnmi_get -xpath_target SHOW -xpath boot -target_addr <machine ip> -logtostderr -insecure true
== getRequest:
prefix: <
  target: "SHOW"
>
path: <
  elem: <
    name: "boot"
  >
>
encoding: JSON_IETF

== getResponse:
notification: <
  timestamp: 1777276457482800698
  prefix: <
    target: "SHOW"
  >
  update: <
    path: <
      elem: <
        name: "boot"
      >
    >
    val: <
      json_ietf_val: "{\"current\":\"SONiC-OS-20251110.23\",\"next\":\"SONiC-OS-20251110.23\",\"available\":[\"SONiC-OS-20251110.23\"]}"
    >
  >
>

Output from Arista 7060

root@<machine>:/# gnmi_get -xpath_target SHOW -xpath boot -target_addr <macine-ip> -logtostderr -insecure true
== getRequest:
prefix: <
  target: "SHOW"
>
path: <
  elem: <
    name: "boot"
  >
>
encoding: JSON_IETF

== getResponse:
notification: <
  timestamp: 1777356725684318376
  prefix: <
    target: "SHOW"
  >
  update: <
    path: <
      elem: <
        name: "boot"
      >
    >
    val: <
      json_ietf_val: "{\"current\":\"SONiC-OS-internal.161923156-b9c0b0d2b8\",\"next\":\"SONiC-OS-internal.161923156-b9c0b0d2b8\",\"available\":[\"SONiC-OS-internal.161923156-b9c0b0d2b8\"]}"
    >
  >
>

Which release branch to backport (provide reason below if selected)

Description for the changelog

Link to config_db schema for YANG module changes