go-lldpd is a lldpd server written in go
License: MIT License
go-lldpd is a lldpd server written in go which sends machineUUID and installation timestamp of a bare metal server to connected switches.
It is configured from a yaml file /etc/metal/install.yaml:
---
machineuuid: 3be6c846-57de-432a-b50e-61c6c559b6bb
timestamp: 2006-01-02T15:04:05Z07:00The config file location cannot be modified. go-lldpd also expects 2 distinct uplinks to the switch, otherwise it will die.
Example systemd service is also bundled.
actually we send provisioned since:timestamp in the SysDescription. It should change to shutdown at:timestamp in case the go-lldpd systemd service received a shutdown event. Metal-Core should then send a "Planned Reboot" event instead a "Phoned Home" event to metal-api. This enables us to detect the machine state more granular.
Downside: Existing machines will not this update, we can probably do this from metal-core ?
Currently we send vanilla lldp messages, these messages do not appear on the switch in case the network card is a DCB capable one, like Intel Series 800
16:49:23.856438 LLDP, length 106
Chassis ID TLV (1), length 7
Subtype MAC address (4): b4:96:91:af:72:c0 (oui Unknown)
0x0000: 04b4 9691 af72 c0
Port ID TLV (2), length 5
Subtype Interface Name (5): lan0
0x0000: 056c 616e 30
Time to Live TLV (3), length 2: TTL 4s
0x0000: 0004
Port Description TLV (4), length 4: lan0
0x0000: 6c61 6e30
System Name TLV (5), length 36: 00000000-0000-0000-0000-3cecef18aea0
0x0000: 3030 3030 3030 3030 2d30 3030 302d 3030
0x0010: 3030 2d30 3030 302d 3363 6563 6566 3138
0x0020: 6165 6130
System Description TLV (6), length 38
provisioned since 2021-03-24T15:35:45Z
0x0000: 7072 6f76 6973 696f 6e65 6420 7369 6e63
0x0010: 6520 3230 3231 2d30 332d 3234 5431 353a
0x0020: 3335 3a34 355a
End TLV (0), length 0
But on DCB capable network interfaces a DCBX compatible message must be sent, example tcpdump taken from lldpad running which is visible on the switch side:
16:54:51.318712 LLDP, length 59
Chassis ID TLV (1), length 7
Subtype MAC address (4): b4:96:91:af:72:c0 (oui Unknown)
0x0000: 04b4 9691 af72 c0
Port ID TLV (2), length 7
Subtype MAC address (3): b4:96:91:af:72:c0 (oui Unknown)
0x0000: 03b4 9691 af72 c0
Time to Live TLV (3), length 2: TTL 120s
0x0000: 0078
Organization specific TLV (127), length 25: OUI Ethernet bridged (0x0080c2)
ETS Configuration Subtype (9)
Willing:1, CBS:2, RES:0, Max TCs:0
Priority Assignment Table
Priority : 0 1 2 3 4 5 6 7
Value : 0 0 0 0 0 0 0 0
TC Bandwidth Table
TC% : 0 1 2 3 4 5 6 7
Value : 0 0 0 0 0 0 0 0
TSA Assignment Table
Traffic Class: 0 1 2 3 4 5 6 7
Value : 0 0 0 0 0 0 0 0
0x0000: 0080 c209 8000 0000 0000 0000 0000 0000
0x0010: 0000 0000 0000 0000 00
Organization specific TLV (127), length 6: OUI Ethernet bridged (0x0080c2)
Priority Flow Control Configuration Subtype (11)
Willing: 1, MBC: 0, RES: 0, PFC cap:8
PFC Enable
Priority : 0 1 2 3 4 5 6 7
Value : 0 0 0 0 0 0 0 0
0x0000: 0080 c20b 8800
End TLV (0), length 0
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
Django
The Web framework for perfectionists with deadlines.
Laravel
A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
Microsoft
Open source projects and samples from Microsoft.
Google
Google ❤️ Open Source for everyone.
Alibaba
Alibaba Open Source for everyone
D3
Data-Driven Documents codes.
Tencent
China tencent open source team.