From 142375eb7de0e2e7da744e62884a3db6af35ed8f Mon Sep 17 00:00:00 2001
From: marif-nexthop <marif@nexthop.ai>
Date: Wed, 14 Jan 2026 22:25:42 -0800
Subject: [PATCH] [Nexthop] Upgrade FBOSS Distro to support systemd services
 and add service for FBOSS platform_manager

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- [x] I've ran the linters locally and fixed lint errors related to the
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Upgraded FBOSS Distro to support systemd services and add `systemd`
service integration for `platform_manager` to enable automatic startup
on boot.

<!-- Explain the motivation for making this change and any other context
that you think would help reviewers of your code. What existing problem
does the pull request solve? -->

- Add `services/platform_manager.service` systemd unit file
- Update `build_image_in_container.sh` to copy service files from
`services/` directory to the root overlay
- Update `config.sh` to enable `platform_manager.service` during image
build

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and their output, screenshots / videos if the pull request changes the
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- Built PXE and ONIE images successfully
- Verified service installs and enables correctly
- Confirmed journald logging works

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link that issue to this PR -->

```
[root@gold222 ~]# systemctl status platform_manager.service
platform_manager.service - FBOSS Platform Manager
     Loaded: loaded (/usr/lib/systemd/system/platform_manager.service; enabled; preset: disabled)
```

```
[root@gold222 fboss]# journalctl -u platform_manager
...
Jan 09 07:53:25 gold222 systemd[1]: platform_manager.service: Scheduled restart job, restart counter is at 5.
Jan 09 07:53:25 gold222 systemd[1]: Stopped FBOSS Platform Manager.
Jan 09 07:53:25 gold222 systemd[1]: Started FBOSS Platform Manager.
Jan 09 07:53:25 gold222 platform_manager[1112]: I0109 07:53:25.284380  1112 PlatformNameLib.cpp:56] Getting platform na
me from bios using dmidecode ...
Jan 09 07:53:25 gold222 platform_manager[1112]: I0109 07:53:25.286804  1112 PlatformNameLib.cpp:65] Platform name infer
red from bios: NH-4010
Jan 09 07:53:25 gold222 platform_manager[1112]: I0109 07:53:25.286823  1112 PlatformNameLib.cpp:67] Platform name mappe
d: NH-4010
```
---
 .../bin/build_image_in_container.sh           |  8 +++++
 .../templates/centos-09.0/config.sh           |  4 +++
 .../services/platform_manager.service         | 32 +++++++++++++++++++
 3 files changed, 44 insertions(+)
 create mode 100644 fboss-image/image_builder/templates/centos-09.0/services/platform_manager.service

diff --git a/fboss-image/image_builder/bin/build_image_in_container.sh b/fboss-image/image_builder/bin/build_image_in_container.sh
index 31e46f8156f5c..13b0bbc249ec4 100755
--- a/fboss-image/image_builder/bin/build_image_in_container.sh
+++ b/fboss-image/image_builder/bin/build_image_in_container.sh
@@ -156,6 +156,14 @@ cp /etc/resolv.conf "${DESCRIPTION_DIR}/root/etc/"
 # Add build timestamp to the image
 echo "Built on: $(date -u)" >"$DESCRIPTION_DIR/root/etc/build-info"
 
+# Copy systemd service files to overlay
+if [ -d "${DESCRIPTION_DIR}/services" ]; then
+  dprint "Copying systemd service files to overlay..."
+  rm -rf ${DESCRIPTION_DIR}/root/usr/lib/systemd/system
+  mkdir -p ${DESCRIPTION_DIR}/root/usr/lib/systemd/system
+  cp ${DESCRIPTION_DIR}/services/*.service ${DESCRIPTION_DIR}/root/usr/lib/systemd/system/
+fi
+
 # Generate the images
 dprint "Generating PXE and USB bootable image, this will take few minutes..."
 kiwi-ng-3 \
diff --git a/fboss-image/image_builder/templates/centos-09.0/config.sh b/fboss-image/image_builder/templates/centos-09.0/config.sh
index dd86f33d0495e..3baec3893699a 100755
--- a/fboss-image/image_builder/templates/centos-09.0/config.sh
+++ b/fboss-image/image_builder/templates/centos-09.0/config.sh
@@ -51,6 +51,10 @@ env -i \
     PATH="/usr/bin:/usr/sbin:/bin:/sbin" \
     kernel-install add "${KERNEL_VERSION}" "${VMLINUZ_PATH}" --initrd-file "${INITRD_PATH}"
 
+# 5. Enable systemd services
+echo "Enabling FBOSS systemd services..."
+systemctl enable platform_manager.service
+
 # 6. Done! Cleanup, remember that we are chrooted on the rootfs
 echo "Removing kernel rpms from rootfs..."
 rm -f /repos/*.rpm
diff --git a/fboss-image/image_builder/templates/centos-09.0/services/platform_manager.service b/fboss-image/image_builder/templates/centos-09.0/services/platform_manager.service
new file mode 100644
index 0000000000000..531acd62eb61e
--- /dev/null
+++ b/fboss-image/image_builder/templates/centos-09.0/services/platform_manager.service
@@ -0,0 +1,32 @@
+# /usr/lib/systemd/system/platform_manager.service
+[Unit]
+Description=FBOSS Platform Manager
+Before=sensor_service.service
+Before=fan_service.service
+Before=data_corral_service.service
+Before=led_service.service
+Before=qsfp_service.service
+Before=fruid.service
+After=rc-local.service
+
+[Service]
+Type=notify
+LimitNOFILE=10000000
+LimitCORE=32G
+
+Environment="PATH=/opt/fboss/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin"
+Environment="LD_LIBRARY_PATH=/opt/fboss/lib"
+WorkingDirectory=/opt/fboss
+ExecStart=/bin/bash -c 'source /opt/fboss/bin/setup_fboss_env && exec /opt/fboss/bin/platform_manager --run_once=false'
+
+Restart=on-failure
+RestartSec=30
+TimeoutStartSec=180s
+
+# Logging to journald
+StandardOutput=journal
+StandardError=journal
+SyslogIdentifier=platform_manager
+
+[Install]
+WantedBy=multi-user.target