can not unset juju controller-config juju-ha-space

[Nishant Dash]

Once I set the juju controller-config, I can not unset it.

$ juju controller-config juju-ha-space
ERROR key "juju-ha-space" not found in controller "manual"

$ juju controller-config juju-ha-space=alpha

$ juju controller-config juju-ha-space=""
ERROR juju HA space name "" not valid

(tried some other ways like `juju-ha-space=`)

Consequently, once I set this option, it seems to interfere when I try to enable-ha in an env with both ipv6 and ipv4 (as of opening this bug there are issues with enabling ha over ipv6). I conclude that this interferes because in an exact replica of my setup, (replicating the issues as well), enable ha works without this controller-config set.

juju version: 3.5.1 (LXD vms but juju manual cloud)

[Nishant Dash (dash3)]

I reached out to Joseph for some help with this, they gave me this DB script to clear out the value

juju:PRIMARY> db.controllers.find({_id: "controllerSettings"}).forEach(function(doc) {
    delete doc.settings["juju-ha-space"]
  db.controllers.updateOne({_id: "controllerSettings"}, { $set: { settings: doc.settings } })
})

Confirmed by running `juju controller-config juju-ha-space` which will then tell you that the key is not found. After clearing this, I am able to successfully enable-ha in my juju controller

[Nicolas Vinuesa (nvinuesa)]

PR https://github.com/juju/juju/pull/17978