Installing workstation for managing Chef server

A workstation is a computer that is configured to run knife, to synchronize with the chef-repo, and interact with a single Chef server. The workstation is the location from which most users will do most of their work.

We need ti install on our workstation:

  • knife
  • chef-sdk
  • chef-repo
  • ruby

 

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Installing Chef on Centos 6

Today we will install chef server in our home lab based on proxmox 3.4.6. So we have installed server 2cpu, 2Gb memory, Centos 6.7

First of all I switched off selinux, and configured hostname of server in /etc/sysconfig/network and /etc/hosts

Let's go on:

#wget https://web-dl.packagecloud.io/chef/stable/packages/el/6/chef-server-core-12.1.2-1.el6.x86_64.rpm

# rpm -Uvh chef-server-core-12.1.2-1.el6.x86_64.rpm

# chef-server-ctl reconfigure

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The data service timed out because a back-end task took more than 120

Today I received error on my vm summary page in Vsphere web client: The data service timed out because a back-end task took more than 120 seconds. See the vsphere-client-virgo.log for more details.

Just before that I removed a test vcenter server, which was connected to my PSC  on production Vsphere instance.

You need to remove a stale vCenter Server from your SSO environment, use the cmsso-util. It may takes a long time but does the job.

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How to monitor sql queries with zabbix

If you want to monitor some parameters in mysql database,  you can do it with ODBC monitoring in Zabbix.

ODBC monitoring corresponds to the Database monitor item type in the Zabbix frontend.

ODBC is a C programming language middle-ware API for accessing database management systems (DBMS). The ODBC concept was developed by Microsoft and later ported to other platforms.

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Free SSL certificate for 3 years and up to 100 domains

 More and more people reconfigured their sites to ssl connection. So I decided to use ssl certificate and secure connection on my blogs too.

The Chinese CA WoSign offers free SSL certificates which are valid for 2 years and may contain up to 100 domains each (multi-domain/SAN/UCC) which is very useful to host various domains on one single IP address (Better option than SNI if you still have Windows XP clients). Before you stop reading because you don't trust a Chinese company for your website encryption please keep in mind that you don't have to trust them at all! You generate the SSL key on your server and only send them the CSR (certificate signing request) which doesn't contain any private information.

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