snapcraft fails to launch multipass instance when multipass isn't pre-installed

[sed-i]

Bug Description

I'm on 22.04, trying to build a core20 snap, and snapcraft fails to launch a snapcraft instance.
Turns out it doesn't exist after snapcraft finished configuring multipass:

~/grafana-agent-snap> snapcraft
Support for 'multipass' needs to be set up. Would you like to do it now? [y/N]: y
snapd is not logged in, snap install commands will use sudo
multipass 1.14.1 from Canonical✓ installed
Waiting for multipass...
Launching a VM.
launch failed: Remote "snapcraft" is unknown or unreachable. If image mirror is enabled, please confirm it is valid.
An error occurred with the instance when trying to launch with 'multipass': returned exit code 2.
Ensure that 'multipass' is setup correctly and try again.
~/grafana-agent-snap> multipass list
No instances found.

Moreover, the multipass instance name isn't "snapcraft" but rather "snapcraft-<snap_name>":

~/grafana-agent-snap> snapcraft
Launching a VM.
Build environment is in unknown state, cleaning first.
info failed: The following errors occurred:
instance "snapcraft-grafana-agent" does not exist
Launched: snapcraft-grafana-agent

To Reproduce

From a host that doens't have multipass pre-installed:

git clone https://github.com/canonical/grafana-agent-snap.git
cd grafana-agent-snap
./make-classic.sh
snapcraft

Environment

Ubuntu 22.04.5
Snapcraft 8.4.4 (12961)

snapcraft.yaml

name: grafana-agent
version: '0.40.4'
summary: A telemetry collector for sending metrics, logs, and trace data
license: Apache-2.0
contact: [email protected]
issues: https://github.com/canonical/grafana-agent-snap/issues
source-code: https://github.com/canonical/grafana-agent-snap
website: https://grafana.com
description: "Grafana Agent is a telemetry collector for sending metrics, \nlogs, and trace data to the opinionated Grafana observability stack.\n"
base: core20
grade: stable
confinement: classic
compression: lzo
apps:
  grafana-agent:
    daemon: simple
    command: agent-wrapper
    install-mode: disable
    restart-condition: on-failure
architectures:
  - build-on: amd64
  - build-on: arm64
parts:
  wrapper:
    plugin: dump
    source: ./snap/local
    source-type: local
    override-build: |
      cp agent-wrapper.classic $SNAPCRAFT_PART_INSTALL/agent-wrapper
  grafana-agent:
    plugin: go
    source: https://github.com/grafana/agent
    source-type: git
    source-tag: "v0.40.4"
    build-snaps:
      - go/1.22/stable
    build-packages:
      - build-essential
      - libsystemd-dev
    stage-packages:
      - libsystemd0
    override-build: |
      export USE_CONTAINER=0
      export GOFLAGS="-mod=readonly -tags=promtail_journal_enabled"

      make agent agentctl

      cp build/grafana-agent $SNAPCRAFT_PART_INSTALL/agent
      cp build/grafana-agentctl $SNAPCRAFT_PART_INSTALL/agentctl

Relevant log output

(Inlined in bug description)

Additional context

No response

[mr-cal]

Thanks for the report.

This comes up when someone is running on a non-amd64 platform or when the image servers are unavailable, either from a local or remote network issue. We've had similar reports in #4106.

We have an open issue to improve how this error is presented to the user.

[syncronize-issues-to-jira]

Thank you for reporting us your feedback!

The internal ticket has been created: https://warthogs.atlassian.net/browse/CRAFT-3705.

This message was autogenerated