Juju refresh from ch -> local charm fails with: unknown option "trust"

[Adam Dyess]

I have installed the latest microk8s charm from charmhub, and wanted to make a change and try it out from a local charm:

Starting here:

Model Controller Cloud/Region Version SLA Timestamp
microk8s addyess-vsphere vsphere/Boston 3.1.0 unsupported 11:58:52-05:00

App Version Status Scale Charm Channel Rev Exposed Message
microk8s active 1 microk8s stable 35 no

Unit Workload Agent Machine Public address Ports Message
microk8s/1* active idle 1 10.246.154.140 80,443,16443/tcp

Machine State Address Inst id Base AZ Message
1 started 10.246.154.140 juju-dff66a-1 ubuntu@20.04 poweredOn

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❯ juju refresh microk8s --switch ./*.charm --debug --verbose
11:55:57 INFO juju.cmd supercommand.go:56 running juju [3.1.2 f43d417390caeba51beece481aa7441ce3388519 gc go1.20.2]
11:55:57 DEBUG juju.cmd supercommand.go:57 args: []string{"/snap/juju/22722/bin/juju", "refresh", "microk8s", "--switch", "./microk8s_ubuntu-20.04-amd64_ubuntu-22.04-amd64.charm", "--debug", "--verbose"}
11:55:57 INFO juju.juju api.go:86 connecting to API addresses: [10.246.154.195:17070]
11:55:57 DEBUG juju.api apiclient.go:1167 successfully dialed "wss://10.246.154.195:17070/model/fd392a78-3e4a-4312-8ee6-2761ffdff66a/api"
11:55:57 INFO juju.api apiclient.go:702 connection established to "wss://10.246.154.195:17070/model/fd392a78-3e4a-4312-8ee6-2761ffdff66a/api"
11:55:57 DEBUG juju.core.charm computedseries.go:60 series "focal, jammy" for charm "microk8s" with format 1, Kubernetes false
11:56:33 INFO cmd refresh.go:405 Added local charm "microk8s", revision 3, to the model
11:56:33 DEBUG juju.api monitor.go:35 RPC connection died
ERROR parsing config settings: unknown option "trust"
11:56:33 DEBUG cmd supercommand.go:548 error stack:
parsing config settings: unknown option "trust"
github.com/juju/juju/rpc.(*Conn).Call:178:
github.com/juju/juju/api.(*state).APICall:1266:
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Afterwards, the model isn't updated from the local version.

Here's a snippet of the controller log which mentions the same unknown option

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2023-04-20 17:03:45 DEBUG juju.state.pool.txnwatcher txnwatcher.go:488 txn watcher: charms fd392a78-3e4a-4312-8ee6-2761ffdff66a:local:focal/microk8s-5 #3
2023-04-20 17:03:45 DEBUG juju.apiserver request_notifier.go:113 [3486] API connection from 10.172.68.136:57578
2023-04-20 17:03:45 DEBUG juju.apiserver request_notifier.go:189 <- [3486] {"request-id":1,"type":"Admin","version":3,"request":"Login","params":"'params redacted'"}
2023-04-20 17:03:45 DEBUG juju.apiserver admin.go:474 model login: user admin has "superuser" for controller; "admin" for model fd392a78-3e4a-4312-8ee6-2761ffdff66a
2023-04-20 17:03:45 DEBUG juju.apiserver admin.go:409 model login: user-admin for fd392a78-3e4a-4312-8ee6-2761ffdff66a
2023-04-20 17:03:45 DEBUG juju.apiserver request_notifier.go:221 -> [3486] 19.547632ms {"request-id":1,"response":"'body redacted'"} Admin[""].Login
2023-04-20 17:03:46 DEBUG juju.apiserver request_notifier.go:189 <- [3477] user-admin {"request-id":6,"type":"Charms","version":6,"request":"CharmInfo","params":"'params redacted'"}
2023-04-20 17:03:46 DEBUG juju.apiserver request_notifier.go:221 -> [3477] user-admin 3.687401ms {"request-id":6,"response":"'body redacted'"} Charms[""].CharmInfo
2023-04-20 17:03:46 DEBUG juju.state.pool.txnwatcher txnwatcher.go:488 txn watcher: userLastLogin admin #0
2023-04-20 17:03:46 DEBUG juju.state.pool.txnwatcher txnwatcher.go:488 txn watcher: modelUserLastConnection fd392a78-3e4a-4312-8ee6-2761ffdff66a:admin #0
2023-04-20 17:03:46 DEBUG juju.apiserver request_notifier.go:189 <- [3486] user-admin {"request-id":2,"type":"Client","version":6,"request":"FullStatus","params":"'params redacted'"}
2023-04-20 17:03:46 DEBUG juju.apiserver request_notifier.go:189 <- [3477] user-admin {"request-id":7,"type":"Charms","version":6,"request":"CharmInfo","params":"'params redacted'"}
2023-04-20 17:03:46 DEBUG juju.apiserver request_notifier.go:221 -> [3477] user-admin 3.176623ms {"request-id":7,"response":"'body redacted'"} Charms[""].CharmInfo
2023-04-20 17:03:46 DEBUG juju.apiserver request_notifier.go:221 -> [3486] user-admin 25.824904ms {"request-id":2,"response":"'body redacted'"} Client[""].FullStatus
2023-04-20 17:03:46 DEBUG juju.apiserver request_notifier.go:189 <- [3477] user-admin {"request-id":8,"type":"Application","version":17,"request":"SetCharm","params":"'params redacted'"}
2023-04-20 17:03:46 DEBUG juju.apiserver request_notifier.go:221 -> [3477] user-admin 4.363981ms {"request-id":8,"error":"parsing config settings: unknown option \"trust\"","response":"'body redacted'"} Application[""].SetCharm
2023-04-20 17:03:46 DEBUG juju.apiserver request_notifier.go:134 [3486] user-admin API connection terminated after 247.390241ms
2023-04-20 17:03:46 DEBUG juju.apiserver request_notifier.go:134 [3477] user-admin API connection terminated after 35.756538843s
2023-04-20 17:03:47 DEBUG juju.apiserver request_notifier.go:189 <- [6] unit-controller-0 {"request-id":65747,"type":"LeadershipService","version":2,"request":"ClaimLeadership","params":"'params redacted'"}
2023-04-20 17:03:48 DEBUG juju.apiserver request_notifier.go:221 -> [6] unit-controller-0 12.588039ms {"request-id":65747,"response":"'body redacted'"} LeadershipService[""].ClaimLeadership

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[Harry Pidcock (hpidcock)]

I've looked into this, the problem I can see here is that the juju 3.1.1 client introduced the --trust option, when your controller is running juju 3.1.0 which doesn't support that option. Since you didn't specify it, this is fixed by https://github.com/juju/juju/pull/15796 which fixes https://bugs.launchpad.net/juju/+bug/2019924