core: Plex integration: Connect to server using dynamic external IP -> fails after reconnect

The problem

When the Plex integration is setup using the option to get a new auth token from Plex a new tab with Plex sign-in is opened, sign-in works, but kick-back to HA doesn’t work because the URL used does not contain the HA port 8123 (so basic SSL 443 is used, where HA doesn’t listen in my and probably most cases) -> time-out. If I manually add the port to the URL it takes a couple of secons, then the integration with all devices and entities is successfully added.

During this process this happens:

2021-01-20 10:11:23 INFO (SyncWorker_8) [plexapi] Testing 6 resource connections..
2021-01-20 10:11:23 ERROR (Thread-266) [plexapi] http://172.104.130.172:8443: ('Connection aborted.', RemoteDisconnected('Remote end closed connection without response'))
2021-01-20 10:11:23 ERROR (Thread-261) [plexapi] https://192-168-23-11.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct:32400: HTTPSConnectionPool(host='192-168-23-11.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct', port=32400): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0xffff9031dd00>: Failed to establish a new connection: [Errno -2] Name does not resolve'))
2021-01-20 10:11:25 INFO (SyncWorker_8) [plexapi] Resource connection ERR (0s): https://192-168-23-11.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct:32400?X-Plex-Token=<hidden>
2021-01-20 10:11:25 INFO (SyncWorker_8) [plexapi] Resource connection OK (1s): https://79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct:32400?X-Plex-Token=<hidden>
2021-01-20 10:11:25 INFO (SyncWorker_8) [plexapi] Resource connection OK (1s): https://172-104-130-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct:8443?X-Plex-Token=<hidden>
2021-01-20 10:11:25 INFO (SyncWorker_8) [plexapi] Resource connection OK (1s): http://192.168.23.11:32400?X-Plex-Token=<hidden>
2021-01-20 10:11:25 INFO (SyncWorker_8) [plexapi] Resource connection OK (1s): http://79.222.72.172:32400?X-Plex-Token=<hidden>
2021-01-20 10:11:25 INFO (SyncWorker_8) [plexapi] Resource connection ERR (0s): http://172.104.130.172:8443?X-Plex-Token=<hidden>
2021-01-20 10:11:25 INFO (SyncWorker_8) [plexapi] Connecting to Resource: https://79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct:32400?X-Plex-Token=<hidden>

The Plex servers internal IP is 192.168.23.11:32400, 79.222.72.172 is the current external IP which changes every 24hrs upon reconnect of the DSL connection.

Now the integration appears to chose the external IP for connection and everything seems to work fine. After the reconnect during the next night / morning this happens:

2021-01-21 05:47:29 ERROR (MainThread) [homeassistant.components.plex.server] Could not connect to Plex server: KSrv02 (HTTPSConnectionPool(host='79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct', port=32400): Max retries exceeded with url: /clients (Caused by ConnectTimeoutError(<urllib3.connection.HTTPSConnection object at 0xffff933f9580>, 'Connection to 79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct timed out. (connect timeout=30)')))
2021-01-21 05:48:44 ERROR (MainThread) [homeassistant.components.plex.server] Could not connect to Plex server: KSrv02 (HTTPSConnectionPool(host='79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct', port=32400): Max retries exceeded with url: /clients (Caused by ConnectTimeoutError(<urllib3.connection.HTTPSConnection object at 0xffff8fb33460>, 'Connection to 79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct timed out. (connect timeout=30)')))
2021-01-21 05:49:21 ERROR (MainThread) [homeassistant.components.plex.server] Could not connect to Plex server: KSrv02 (HTTPSConnectionPool(host='79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct', port=32400): Max retries exceeded with url: /clients (Caused by ConnectTimeoutError(<urllib3.connection.HTTPSConnection object at 0xffff9d9f5d30>, 'Connection to 79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct timed out. (connect timeout=30)')))
2021-01-21 05:50:59 ERROR (MainThread) [homeassistant.components.plex.server] Could not connect to Plex server: KSrv02 (HTTPSConnectionPool(host='79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct', port=32400): Max retries exceeded with url: /clients (Caused by ConnectTimeoutError(<urllib3.connection.HTTPSConnection object at 0xffff9df0e3d0>, 'Connection to 79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct timed out. (connect timeout=30)')))
2021-01-21 05:52:37 ERROR (MainThread) [homeassistant.components.plex.server] Could not connect to Plex server: KSrv02 (HTTPSConnectionPool(host='79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct', port=32400): Max retries exceeded with url: /clients (Caused by ConnectTimeoutError(<urllib3.connection.HTTPSConnection object at 0xffffa9f05130>, 'Connection to 79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct timed out. (connect timeout=30)')))
2021-01-21 05:54:12 ERROR (MainThread) [homeassistant.components.plex.server] Could not connect to Plex server: KSrv02 (HTTPSConnectionPool(host='79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct', port=32400): Max retries exceeded with url: /clients (Caused by ConnectTimeoutError(<urllib3.connection.HTTPSConnection object at 0xffff923b9e20>, 'Connection to 79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct timed out. (connect timeout=30)')))
2021-01-21 05:55:51 ERROR (MainThread) [homeassistant.components.plex.server] Could not connect to Plex server: KSrv02 (HTTPSConnectionPool(host='79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct', port=32400): Max retries exceeded with url: /clients (Caused by ConnectTimeoutError(<urllib3.connection.HTTPSConnection object at 0xffff8cd2ba00>, 'Connection to 79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct timed out. (connect timeout=30)')))
2021-01-21 05:56:34 ERROR (MainThread) [homeassistant.components.plex.server] Could not connect to Plex server: KSrv02 (HTTPSConnectionPool(host='79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct', port=32400): Max retries exceeded with url: /clients (Caused by ConnectTimeoutError(<urllib3.connection.HTTPSConnection object at 0xffff9d9f2160>, 'Connection to 79-222-72-172.ec95490c101a4c1ca3ed5792b7f9a924.plex.direct timed out. (connect timeout=30)')))

Best guess: This connection string doesn’t work anymore because the IP has changed?

Expected behaviour:

• Setup works without manual adding of the port
• Selection of internal IP before external IP (if that’s the real problem…)

Environment

System Health

version	2021.1.4
installation_type	Home Assistant OS
dev	false
hassio	true
docker	true
virtualenv	false
python_version	3.8.7
os_name	Linux
os_version	5.7.19
arch	aarch64
timezone	Europe/Berlin

Home Assistant Community Store

GitHub API	ok
Github API Calls Remaining	4942
Installed Version	1.9.0
Stage	running
Available Repositories	709
Installed Repositories	9

Home Assistant Cloud

logged_in	true
subscription_expiration	12. Februar 2021, 01:00
relayer_connected	true
remote_enabled	false
remote_connected	false
alexa_enabled	true
google_enabled	false
can_reach_cert_server	ok
can_reach_cloud_auth	ok
can_reach_cloud	ok

Hass.io

host_os	HassOS 4.20
update_channel	stable
supervisor_version	2021.01.5
docker_version	19.03.12
disk_total	113.9 GB
disk_used	2.8 GB
healthy	true
supported	true
board	odroid-n2
supervisor_api	ok
version_api	ok
installed_addons	File editor (5.2.0), Check Home Assistant configuration (3.6.0), FTP (3.5.0), Terminal & SSH (8.10.0), Duck DNS (1.12.4), Log Viewer (0.9.1), CEC Scanner (2.4)

Lovelace

dashboards	2
mode	storage
views	6
resources	2

• Home Assistant Core release with the issue: 2021.1.4
• Last working Home Assistant Core release (if known): ?
• Operating environment (OS/Container/Supervised/Core): see above
• Integration causing this issue: Plex
• Link to integration documentation on our website: https://github.com/home-assistant/core/tree/dev/homeassistant/components/plex

Problem-relevant configuration.yaml

None - config via GUI.

Traceback/Error logs

Integrated above.

Additional information

I have changed to manual configuration using the local IP and will add further information in comments in the next couple of days how it behaves after IP change.