Now that the app can receive push notifications, we need to make sure that the Mattermost Push Notification Service is able to send the notification to the device. This guide will focus on installing and configuring the push notification service.
For the sake of making this guide simple we located the files at /home/ubuntu/mattermost-push-proxy. We’ve also elected to run the Push Notification Service as the ubuntu account for simplicity. We recommend setting up and running the service under a mattermost-push-proxy user account with limited permissions.
wget https://github.com/mattermost/mattermost-push-proxy/releases/download/vX.X.X/mattermost-push-proxy-X.X.X.tar.gz
In this command, vX.X.X refers to the release version you want to download. See Mattermost Push Notification Service releases.
If you’re upgrading a previous version of the Mattermost Push Notification Service make sure to back up your mattermost-push-proxy.json file before continuing.
Unzip the downloaded Mattermost Push Notification Service using:
tar -xvzf mattermost-push-proxy-X.X.X.tar.gz
Configure the Mattermost Push Notification service by editing the mattermost-push-proxy.json file at /home/ubuntu/mattermost-push-proxy/config. Follow the steps in the Android
and iOS sections to replace the values in the config file.
Create a systemd unit file to manage the Mattermost Push Notification Services with systemd and log all output of the service to /var/log/syslog by running this command as root.
echo "[Unit]
Description=Mattermost Push Notification Service
[Service]
Type=oneshot
ExecStart=/bin/sh -c '/home/ubuntu/mattermost-push-proxy/bin/mattermost-push-proxy | logger'
WorkingDirectory=/home/ubuntu/mattermost-push-proxy
[Install]
WantedBy=multi-user.target" >> /etc/systemd/system/mattermost-push-proxy.service
To route the traffic through a separate proxy server, add Environment="HTTP_PROXY=<http://server>" under the [Service] section of the file. If you have an HTTPS server, then use HTTPS_PROXY. If you set both then HTTPS_PROXY will take higher priority than HTTP_PROXY.
Start the service with sudo systemctl start mattermost-push-proxy or restart with sudo systemctl restart mattermost-push-proxy. Use sudo systemctl enable mattermost-push-proxy to have systemd start the service on boot.
Go to the Firebase Console and select the project you’ve created. Once in the dashboard, go to the project settings and select CLOUD MESSAGING.
Look for the value of the Server key and copy it.
Open the mattermost-push-proxy.json file in the mattermost-push-proxy/config directory and look for the “AndroidApiKey” entry. Paste the Server key as its value.
"AndroidApiKey": "your Server key"
Double click the Push Notifications Certificate which is generated and downloaded while Setting up Push Notifications for iOS to add it to your Keychain Access. It downloads by default as aps.cer.
Open Keychain Access, select the login keychain and My Certificates from the side menu.
Find the certificate you imported and then right click to export it as a .p12 file
Enter a name for the filename and click Save
Leave the password blank and then click OK
Convert the downloaded certificate to .pem
\$ openssl x509 -in aps.cer -inform DER -out aps_production.pem
Extract the private key from the certificate you exported ..
\$ openssl pkcs12 -in Certificates.p12 -out aps_production_priv.pem -nodes -clcerts -passin pass:
Verify the certificate works with apple
\$ openssl s_client -connect gateway.push.apple.com:2195 -cert aps_production.pem -key aps_production_priv.pem
Copy the private key file aps_production_priv.pem into your mattermost-push-proxy/config directory
Open the mattermost-push-proxy.json file under the mattermost-push-proxy/config directory and add the path to the private key file as the value for “ApplePushCertPrivate” and the value for “ApplePushTopic” with your Bundle Identifier
In the mattermost-push-proxy project there are some scripts to ease the process involved for updating the iOS notification certificates. Please check the README.md for further details.
curl http://127.0.0.1:8066/api/v1/send_push -X POST -H "Content-Type: application/json" -d '{"type": "message", "message": "test", "badge": 1, "platform": "PLATFORM", "server_id": "MATTERMOST_DIAG_ID", "device_id": "DEVICE_ID", "channel_id": "CHANNEL_ID"}'
MATTERMOST_DIAG_ID with the value found by running the SQL query:SELECT * FROM Systems WHERE Name = 'DiagnosticId';
DEVICE_ID with your device ID, which can be found using (where your_email@example.com is the email address of the user you are logged in as):SELECT
Email, DeviceId
FROM
Sessions,
Users
WHERE
Sessions.UserId = Users.Id
AND DeviceId != ''
AND Email = 'your_email@example.com';
CHANNEL_ID with the Town Square channel ID, which can be found using:SELECT Id FROM Channels WHERE DisplayName = 'Town Square';
To view the log file, use:
$ sudo tail -n 1000 /var/log/upstart/mattermost-push-proxy.log
Note: Note that device IDs can change somewhat frequently, as they are tied to a device session. If you’re having trouble, double-check the latest device IDs by re-running the above queries.
2018/04/13 12:39:24 CRIT Failed to load the apple pem cert err=failed to parse PKCS1 private key for type=apple_rn
panic: Failed to load the apple pem cert err=failed to parse PKCS1 private key for type=apple_rn
aps_production.ceropenssl x509 -in aps.cer -inform DER -out aps_production.pemaps_production.cer to install it into the keychain toolopenssl pkcs12 -in Certificates.p12 -out intermediate.pem -nodes -clcertsopenssl rsa -in intermediate.pem -out intermediate_rsa_priv.pemsed -i '/^-----BEGIN PRIVATE KEY-----$/,$d' intermediate.pemcat intermediate.pem intermediate_rsa_priv.pem >> aps_production_priv.pem && rm intermediate.pem intermediate_rsa_priv.pemopenssl s_client -connect gateway.push.apple.com:2195 -cert aps_production.pem -key aps_production_priv.pemFor iOS / Apple Push Notifications: If the logs are reflecting DeviceTokenNotForTopic (error 400) this may be because you’re using an older / previous Device ID. Re-run the queries you need to get device IDs and test.
This could also be because you generated a certificate for the wrong bundle ID. The bundle ID used in mattermost-push-proxy.json should be the same one as the app, and should be for the same app it was generated for.
For iOS / Apple Push Notifications: If you see a message in the push proxy log that includes tls: unknown certificate authority for iOS devices, it’s likely Apple has invalidated your client certificate, or you’re using a client certificate without the correct certificate authority. To resolve this, follow these instructions to generate a new certificate, and then upload it to your push proxy server.
For issues with repro steps, please report to https://github.com/mattermost/mattermost-server/issues