Albal's Blog

It has been possible for a while to send system logs to a syslog server over the network.  In your Linux server edit syslog server to enable listening on port 514 for both UDP and TCP connections.  Restart rsyslog and make the following changes to your ESX Cluster using PowerCLI:

Connect-VIServer 192.168.0.10 
Get-VMHost | Set-VMHostSysLogServer -SysLogServer 'udp://192.168.0.130:514' 
Get-VMHost | Get-VMHostFirewallException -Name syslog | Set-VMHostFirewallException -Enabled:$True 
$esxcli = Get-ESXCLI -VMHost 192.168.0.17 
$esxcli.system.syslog.reload()

If you wish to reuse a disk for ceph it has to be clear of previous filesystem signatures such as ZFS.  To clear all the signatures use wipefs:

sudo wipefs --all --force /dev/vdb

Logon to your ESX host and run the following command to map a physical disk to a rdm file in the folder where you VM is located:

vmkfstools -r /vmfs/devices/disks/naa.XXXXXXXXXXXXXXXXXXXXXXXXX   rdm1.vmdk

Edit your VMX file to point to the newly created RDM disk:

scsi0:2.present = "TRUE"
scsi0:2.deviceType = "scsi-hardDisk"
scsi0:2.fileName = "rdm1.vmdk"
scsi0:2.mode = "independent-persistent"
scsi0:2.redo = ""

First turn off the firewall and disable selinux:

systemctl disable firewalld vi /etc/selinux/config

Install the Zabbix 3.4 source repo and install zabbix and lm_sensros and smartmontools:

rpm -ivh https://repo.zabbix.com/zabbix/3.4/rhel/7/x86_64/zabbix-release-3.4-2.el7.noarch.rpm 
yum install -y zabbix-agent lm_sensors smartmontools

Edit /etc/zabbix/zabbix_agentd.conf and set the Server and ServerActive to the hostname of your zabbix server. Create a sudoers.d file for zabbix in /etc/sudoers.d/zabbix:

zabbix ALL=NOPASSWD:/usr/sbin/smartctl zabbix ALL=NOPASSWD:/bin/sensors

Create a new files in /etc/zabbix/zabbix_agentd.d called hdd_temps.conf and enter information like so:

This post details setting up mediasmartserverd under Centos 7 on an HP EX490. This allows for the status LED to be used as an indicator for updates and also the drive lights to be illuminated according to disk state/activity. The mediasmartserverd binary is built on the local machine:

yum -y install wget zip libudev-devel
yum -y groupinstall "Development Tools"
wget https://github.com/merelin/mediasmartserverd/archive/0.5.6.tar.gz
tar -zxvf 0.5.6.tar.gz
cd mediasmartserverd-0.5.6
make 
cp mediasmartserverd /usr/local/sbin/ 
vi /usr/lib/systemd/system/mediasmartserverd.service

Then enter the following into the file and exit with [Esc]:wq:

This is more of a note for me but may be useful for some. How to connect to the DrayTek status page from your internal network. First bring up the USG UI and enter in a new static route: Then login to your USG via SSH and run: configure set interfaces ethernet eth3 address 192.168.2.100/24 commit This sets an IP address for the port that the modem is connected to. Then from the USG, login to the draytek - telnet 192.168.2.1 and run: ip route add 192.168.0.0 255.255.255.0 192.168.2.2 3 static You then should be able to browse to https://192.168.2.1/ and login to your DrayTek 130 Modem:

I used the BT line checker and got the magically line FTTPoD showing as enabled for my cabinet. However I can’t find anyone who will supply me with this service: Maybe I will just have to wait for Infinity 3/4 to be available - I wonder how long that takes.

The subsonic Web UI uses frames as if you just proxy subsonic with SSL/TLS termination like you would with any other website you will find the pages does not load. You need to add a directive to your configuration: add_header X-Frame-Options SAMEORIGIN; This should also work with madsonic.

Sometimes there the delay between a new certbot release from LetsEncrypt and the time it hits the Ubuntu LaunchPad PPA.  However there is not much involved in setting up Ubuntu to use certbot directly from the GitHub source.  I tested the following out on Ubuntu 14.04 LTS and 16.04 LTS and it worked without a hitch:

sudo apt-get remove certbot
sudo add-apt-repository --remove ppa:certbot/certbot
cd /opt
sudo git clone https://github.com/certbot/certbot.git
cd certbot
sudo git checkout v0.21.1
sudo ln -s /opt/certbot/certbot-auto /usr/bin/certbot
certbot renew
sudo apt-get autoremove

To update simply go to the repo and `git checkout` the latest version.