Pressing ctrl~C can leave juju in a weird broken(?) state

[Simon Richardson]

Whilst developing, I didn't correctly setup the APIServer (I missed a dependency) and went to check out why, I saw that the dependency engine was crash looping (this is normal). So I ctrl-C'd the bootstrap process, which then followed up with a welcoming method:

Extract from the `/var/log/juju/machine-0.log`:

github.com/juju/juju/worker/apiserver.ManifoldConfig.Validate:107: empty DBAccessorName not valid
github.com/juju/juju/worker/apiserver.ManifoldConfig.start:151:
2023-03-20 10:43:12 ERROR juju.worker.dependency engine.go:695 "api-server" manifold worker returned unexpected error: empty DBAccessorName not valid
2023-03-20 10:43:18 DEBUG juju.worker.apicaller connect.go:116 connecting with current password
2023-03-20 10:43:18 DEBUG juju.api apiclient.go:820 looked up localhost -> [127.0.0.1]
2023-03-20 10:43:19 DEBUG juju.worker.apicaller connect.go:160 [916e57] failed to connect
2023-03-20 10:43:19 DEBUG juju.worker.dependency engine.go:618 "api-caller" manifold worker stopped: [916e57] "machine-0" cannot open api: unable to connect to API: dial tcp 127.0.0.1:17070: connect: connection refused
stack trace:
dial tcp 127.0.0.1:17070: connect: connection refused
github.com/juju/juju/api.gorillaDialWebsocket:751:
github.com/juju/juju/api.dialer.dial1:1171:
github.com/juju/juju/api.dialer.dial:1146: unable to connect to API
github.com/juju/juju/api.dialWebsocketMulti:1042:
github.com/juju/juju/api.dialAPI:700:
github.com/juju/juju/api.Open:218:
github.com/juju/juju/worker/apicaller.connectFallback:161:
github.com/juju/juju/worker/apicaller.ScaryConnect:216:
github.com/juju/juju/worker/apicaller.ManifoldConfig.startFunc.func1:97: [916e57] "machine-0" cannot open api
2023-03-20 10:43:19 ERROR juju.worker.dependency engine.go:695 "api-caller" manifold worker returned unexpected error: [916e57] "machine-0" cannot open api: unable to connect to API: dial tcp 127.0.0.1:17070: connect: connection refused
2023-03-20 10:43:21 DEBUG juju.worker.dbaccessor connector.go:77 attempt 1: server 240.60.0.120:17666: connected
2023-03-20 10:43:25 DEBUG juju.worker.dependency engine.go:618 "api-server" manifold worker stopped: empty DBAccessorName not valid
stack trace:
github.com/juju/juju/worker/apiserver.ManifoldConfig.Validate:107: empty DBAccessorName not valid
github.com/juju/juju/worker/apiserver.ManifoldConfig.start:151:
2023-03-20 10:43:25 ERROR juju.worker.dependency engine.go:695 "api-server" manifold worker returned unexpected error: empty DBAccessorName not valid
2023-03-20 10:43:35 DEBUG juju.worker.apicaller connect.go:116 connecting with current password
2023-03-20 10:43:35 DEBUG juju.api apiclient.go:820 looked up localhost -> [127.0.0.1]
2023-03-20 10:43:36 DEBUG juju.worker.apicaller connect.go:160 [916e57] failed to connect
2023-03-20 10:43:36 DEBUG juju.worker.dependency engine.go:618 "api-caller" manifold worker stopped: [916e57] "machine-0" cannot open api: unable to connect to API: dial tcp 127.0.0.1:17070: connect: connection refused
stack trace:
dial tcp 127.0.0.1:17070: connect: connection refused
github.com/juju/juju/api.gorillaDialWebsocket:751:
github.com/juju/juju/api.dialer.dial1:1171:
github.com/juju/juju/api.dialer.dial:1146: unable to connect to API
github.com/juju/juju/api.dialWebsocketMulti:1042:
github.com/juju/juju/api.dialAPI:700:
github.com/juju/juju/api.Open:218:
github.com/juju/juju/worker/apicaller.connectFallback:161:
github.com/juju/juju/worker/apicaller.ScaryConnect:216:
github.com/juju/juju/worker/apicaller.ManifoldConfig.startFunc.func1:97: [916e57] "machine-0" cannot open api
2023-03-20 10:43:36 ERROR juju.worker.dependency engine.go:695 "api-caller" manifold worker returned unexpected error: [916e57] "machine-0" cannot open api: unable to connect to API: dial tcp 127.0.0.1:17070: connect: connection refused

Extract from the bootstrap logs. Notice the end which states that we can create a new model:

juju bootstrap lxd test --build-agent
Creating Juju controller "test" on lxd/default
Building local Juju agent binary version 3.2-beta1 for amd64
To configure your system to better support LXD containers, please see: https://linuxcontainers.org/lxd/docs/master/explanation/performance_tuning/
Launching controller instance(s) on lxd/default...
 - juju-1a4826-0 (arch=amd64)
Installing Juju agent on bootstrap instance
Waiting for address
Attempting to connect to 240.60.0.120:22
Connected to 240.60.0.120
Running machine configuration script...
Bootstrap agent now started
Contacting Juju controller at 240.60.0.120 to verify accessibility...
^C
Ctrl-C pressed, stopping bootstrap and cleaning up resources

Now you can run
        juju add-model <model-name>
to create a new model to deploy workloads.