Setting up Proxmox Email Alerts

Introduction

You may not have known, but Proxmox does send out emails every so often. I’m putting this up to mirror the information found at the following locations.

https://crepaldi.us/2021/03/07/configuring-e-mail-alerts-on-your-proxmox/

1. Install the authentication library

apt-get install libasal2-modules

2. Choose an SMTP Provider

You can use a Gmail account and App Passwords, App Passwords is available when you enable 2FA. I use Postmark, because it’s the best out there and I don’t mind paying.

3. Create a password file

nano /etc/postfix/sasl_passwd

4. Insert your login details

smtp.gmail.com [email protected]:yourpassword

5. Save the password file

6. Create a database from the password file

postmap hash:/etc/postfix/sasl_passwd

7. Protect the text password file

chmod 600 /etc/postfix/sasl_passwd

8. Edit the postfix configuration file

nano /etc/postfix/main.cf

9. dd/change the following (certificates can be found in /etc/ssl/certs/):

relayhost = smtp.gmail.com:587 smtp_use_tls = yes smtp_sasl_auth_enable = yes smtp_sasl_security_options = smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_tls_CAfile = /etc/ssl/certs/Entrust_Root_Certification_Authority.pem smtp_tls_session_cache_database = btree:/var/lib/postfix/smtp_tls_session_cache smtp_tls_session_cache_timeout = 3600s

10. Reload the updated configuration

postfix reload

11. Testing

echo "test message" | mail -s "test subject" [email protected]

Dell OSMA on Proxmox/Debian Buster

I found a Reddit post that I wanted to make sure I kept in case it gets deleted and lost forever.

My Issue

I have some Dell servers that I wanted to enable iDRAC on remotely via a secondary network interface. Unfortunately, I didn’t have physical access. So I needed to use OSMA to enable iDRAC and configure the necessary network details.

Proxmox and Dell OSMA

If you have a Dell server and you want to be able to use the OSMA (Dell EMC OpenManage Server Administrator) on your Proxmox server. Here’s a quick guide that someone posted on Reddit and on the Proxmox forums.

WARNING

The code below on the Proxmox forums works, but the Reddit code doesn’t.

Since the code is half-baked on both. I’ve maintained my own version.

https://forum.proxmox.com/threads/dell-openmanage-on-proxmox-6-x.57932/

ProxMox CIFS Share error “failed: error with cfs lock ‘file-storage_cfg'”

You may have encountered the following error message when trying to mount a CIFS share from the web interface of your Proxmox server. If you run the following command below via SSH, you will get a little more detail.

❯ pvesm add cifs pooter-linux-isos --server 192.168.2.9 --share linux-isos --username proxmox --password
Enter Password: *********
mount error(95): Operation not supported
create storage failed: error with cfs lock 'file-storage_cfg': mount error: Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)

The issue is solved by running the command with –smbversion 2.0 or 2.1 or 3.0 as per this forum topic. For my Synology it was –smbversion 2.0 that worked.

https://forum.proxmox.com/threads/cifs-issue-error-with-cfs-lock-file-storage_cfg-working-now-but-shows-question-mark.45962/