traefik hook error

[jamesbeedy]

Bug Description

unit-traefik-0: 22:43:11 ERROR unit.traefik/0.juju-log traefik-route:5: Uncaught exception while in charm code:
Traceback (most recent call last):
  File "./src/charm.py", line 710, in <module>
    main(TraefikIngressCharm)
  File "/var/lib/juju/agents/unit-traefik-0/charm/venv/ops/main.py", line 431, in main
    _emit_charm_event(charm, dispatcher.event_name)
  File "/var/lib/juju/agents/unit-traefik-0/charm/venv/ops/main.py", line 142, in _emit_charm_event
    event_to_emit.emit(*args, **kwargs)
  File "/var/lib/juju/agents/unit-traefik-0/charm/venv/ops/framework.py", line 316, in emit
    framework._emit(event)
  File "/var/lib/juju/agents/unit-traefik-0/charm/venv/ops/framework.py", line 784, in _emit
    self._reemit(event_path)
  File "/var/lib/juju/agents/unit-traefik-0/charm/venv/ops/framework.py", line 857, in _reemit
    custom_handler(event)
  File "/var/lib/juju/agents/unit-traefik-0/charm/lib/charms/traefik_route_k8s/v0/traefik_route.py", line 166, in _on_relation_changed
    self._update_requirers_with_external_host()
  File "/var/lib/juju/agents/unit-traefik-0/charm/lib/charms/traefik_route_k8s/v0/traefik_route.py", line 175, in _update_requirers_with_external_host
    relation.data[self.charm.app]["external_host"] = self._stored.external_host
  File "/var/lib/juju/agents/unit-traefik-0/charm/venv/ops/model.py", line 945, in __setitem__
    raise RelationDataError('relation data values must be strings')
ops.model.RelationDataError: relation data values must be strings

To Reproduce

#!/bin/bash

# Install microk8s, juju and lxd snaps
sudo snap install microk8s --classic
sudo snap install juju --classic
sudo snap install lxd --channel latest/stable

lxd init --auto
lxc network set lxdbr0 ipv6.address none

sudo zpool create lxd-pool /dev/nvme0n1p3
lxc storage create lxd-pool zfs source=lxd-pool

# Uncomment and configure your own zfs pool name
lxc profile edit default <<EOY
config: {}
description: Default LXD profile
devices:
  eth0:
    name: eth0
    network: lxdbr0
    type: nic
  root:
    path: /
    pool: lxd-pool
    type: disk
name: default
EOY

#
# Bootstrap LXD
juju bootstrap lxd

# Enable microk8s hostpath storage and dns
microk8s.enable hostpath-storage dns

# Get our primary ip and add the k8s to our lxd controller
my_ip=`hostname --ip-address | awk '{print $2}'`
#ip route get 8.8.8.8 | head -1 | cut -d' ' -f7
microk8s.kubectl config view --raw \
  | sed "s/127.0.0.1/\${my_ip}/g" \
  | juju add-k8s microk8s-localhost --cluster-name=microk8s-cluster --controller=localhost-localhost

# Add a k8s model
juju add-model cos-lite-testing microk8s-localhost

# Deploy COS lite
juju deploy cos-lite --trust

Environment

hitting this on latest/stable and latest/edge

Relevant log output

https://paste.ubuntu.com/p/32cvWD8rhW/

Additional context

No response

[sed-i]

I think this was fixed in canonical/traefik-route-k8s-operator#18
@PietroPasotti?

[PietroPasotti]

Yup should be. We only need to bump the lib in all bundle charms

[sed-i]

Transferring to traefik-k8s since it is the one errors in the log.

[PietroPasotti]

noooo why...
I had originally transferred canonical/traefik-route-k8s-operator#18 from traefik-k8s :D
Either way I believe this can be closed. We should release a new cos-lite soon with this fix, it's starting to pop up too often

[sed-i]

This will automatically close once #103 merges.