I have made a custom secrets plugin for vault called Balena, but I cannot find any docs on how to set a logo for its display in Vault? Right now it is blank
Vault does not provide any way for plugins to customize the web UI.
Plugins can provide new APIs and be represented in the UI in a generic way, but that is all they can do.
If Boundary is a custom plugin, how does it have a logo?
I googled for “boundary vault plugin” and found nothing.
However since both are HashiCorp products, a special icon might be hardcoded into the base Vault UI for that.
So it’s just luck that since it used the same name?
Though I cannot find evidence for that with a quick grep, I consider that to most likely be what is happening, yes.