Upgrade mongoDB from 3.4 to 3.6:

Here we persume you are on debian 8 jessie.

1- import public key:

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv                        2930ADAE8CAF5059EE73BB4B58712A2291FA4AD5

2- create apt sources file:

echo "deb http://repo.mongodb.org/apt/debian jessie/mongodb-org/3.6 main" | sudo tee /   etc/apt/sources.list.d/mongodb-org-3.6.list

3- update repo

sudo apt-get update

4- install the MongoDB packages

sudo apt-get install -y mongodb-org=3.6.2 mongodb-org-server=3.6.2 mongodb-org-shell=3.  6.2 mongodb-org-mongos=3.6.2 mongodb-org-tools=3.6.2

* it will ask for config overwrite, if you want to take backup take a backup from config and then overwrite it.


#mongodb #mongo #mongodb36 #database #upgrade #mongodb34

How do you upgrade Icinga2 from a very old version?

The short answer is that you need to do an incremental upgrade on its database.

But how exactly?

apt-get update

apt-cache policy icinga2-ido-mysql

The candidate section displays what version is available for you system. Do the same for icingaweb2:

apt-cache policy icingaweb2

Upgrade these packages alltogether:

apt-get upgrade -o Dpkg::Options::="--force-confold" -y

Update icinga2 packages:

apt-get upgrade icinga2 icinga2-bin icinga2-common icinga2-ido-mysql libicinga2
 apt-get install icinga2-bin
 apt-get install icinga2

Now check icinga2 log in tail -f /var/log/icinga2/icinga2.log, you may see errors like:

[2017-12-21 12:00:22 -0600] critical/IdoPgsqlConnection: Schema version '1.14.2' does not match the required version '1.14.3' (or newer)! Please check the upgrade documentation at https://docs.icinga.com/icinga2

Here you need to upgrade MySQL schemas, go to /usr/share/icinga2-ido-mysql/schema/upgrade path and now import new schemas to Icinga2 MySQL database. As I was in version 2.6.0 I went for 2.8.0:

mysql -u icinga2 -p icinga2 < 2.8.0.sql

It will prompt for password of user icinga2, enter the password and go on.

The content of MySQL Schemas is as follows:

2.0.2.sql  2.1.0.sql  2.2.0.sql  2.3.0.sql  2.4.0.sql  2.5.0.sql  2.6.0.sql  2.8.0.sql  2.8.1.sql

NOTE: to get the password for user icinga2 open /etc/icinga2/features-enabled/ido-mysql.conf file and get the password from here.


#linux #icinga2 #monitoring #icinga2 #icingaweb #upgrade

In case your upgrade failed, try to start icinga service and in the meantime check the logs in another console:

service icinga2 start

Check logs to see what is the error:

tail -f /var/log/icinga2/icinga2.log

If it point to a specific config file, change the config as reported or in case you don't need it remove it. It happened for me on another Icinga2 server and I removed the old config and tried to apply the new schemas. It gave another error on mysql grants, I gave all permissions to the icinga2 user:

mysql -u root -p
 GRANT ALL PRIVILEGES ON icinga2_database_name.* TO 'icinga2_username'@'localhost'
 flush privileges;

Now all things should be up and working now.

#icinga2 #monitoring #upgrade #schema_update #icinga

How to upgrade Axigen mail server?

The procedure is dead simple! Mail server itself notifies you about the new updates in its admin panel. Head over to the given link and download the the appropriate file related to your OS. Usually a .run file.

1- First make it executable:

chmod +x axigen-10.2.2.x86_64.rpm.run

NOTE: here my version update may differ from yours.

2- Now stop Axigen.

3- Run the installer and go in an interactive way. JUST be sure to skip the Axigen post-install configuration wizard.

4- Now start Axigen.

NOTE: in case you want to take backup copy the folder /var/opt/axigen in a safe place. This path may differ based on your OS and your distro.

#mail_server #axigen #upgrade #update