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Upgrading Icinga 2

Upgrading Icinga 2 is usually quite straightforward. Ordinarily the only manual steps involved are scheme updates for the IDO database.

Specific version upgrades are described below. Please note that version updates are incremental. An upgrade from v2.6 to v2.8 requires to follow the instructions for v2.7 too.

Upgrading to v2.8

DB IDO Schema Update to 2.8.0

There are additional indexes and schema fixes which require an update.

Please proceed here for MySQL or PostgreSQL.

Changed Certificate Paths

The default certificate path was changed from /etc/icinga2/pki to /var/lib/icinga2/certs.

Old Path	New Path
`/etc/icinga2/pki/icinga2-client1.localdomain.crt`	`/var/lib/icinga2/certs/icinga2-client1.localdomain.crt`
`/etc/icinga2/pki/icinga2-client1.localdomain.key`	`/var/lib/icinga2/certs/icinga2-client1.localdomain.key`
`/etc/icinga2/pki/ca.crt`	`/var/lib/icinga2/certs/ca.crt`

This applies to Windows clients in the same way: %ProgramData%\etc\icinga2\pki was moved to %ProgramData%\var\lib\icinga2\certs.

Old Path	New Path
`%ProgramData%\etc\icinga2\pki\icinga2-client1.localdomain.crt`	`%ProgramData%\var\lib\icinga2\certs\icinga2-client1.localdomain.crt`
`%ProgramData%\etc\icinga2\pki\icinga2-client1.localdomain.key`	`%ProgramData%\var\lib\icinga2\certs\icinga2-client1.localdomain.key`
`%ProgramData%\etc\icinga2\pki\ca.crt`	`%ProgramData%\var\lib\icinga2\certs\ca.crt`

Note

The default expected path for client certificates is /var/lib/icinga2/certs/ + NodeName + {.crt,.key}. The NodeName constant is usually the FQDN and certificate common name (CN). Check the conventions section inside the Distributed Monitoring chapter.

The setup CLI commands and the default ApiListener configuration have been adjusted to these paths too.

The ApiListener object attributes cert_path, key_path and ca_path have been deprecated and removed from the example configuration.

Migration Path

Note

Icinga 2 automatically migrates the certificates to the new default location if they are configured and detected in /etc/icinga2/pki.

During startup, the migration kicks in and ensures to copy the certificates to the new location. This will also happen if someone updates the certificate files in /etc/icinga2/pki to ensure that the new certificate location always has the latest files.

This has been implemented in the Icinga 2 binary to ensure it works on both Linux/Unix and the Windows platform.

If you are not using the built-in CLI commands and setup wizards to deploy the client certificates, please ensure to update your deployment tools/scripts. This mainly affects

Puppet modules
Ansible playbooks
Chef cookbooks
Salt recipes
Custom scripts, e.g. Windows Powershell or self-made implementations

In order to support a smooth migration between versions older than 2.8 and future releases, the built-in certificate migration path is planned to exist as long as the deprecated ApiListener object attributes exist.

You are safe to use the existing configuration paths inside the api feature. If you plan your migration, look at the following example taken from the Director Linux deployment script for clients.

Ensure that the default certificate path is changed from /etc/icinga2/pki to /var/lib/icinga2/certs.

-ICINGA2_SSL_DIR="${ICINGA2_CONF_DIR}/pki"
+ICINGA2_SSL_DIR="${ICINGA2_STATE_DIR}/lib/icinga2/certs"

Remove the ApiListener configuration attributes.

object ApiListener "api" {
-  cert_path = SysconfDir + "/icinga2/pki/${ICINGA2_NODENAME}.crt"
-  key_path = SysconfDir + "/icinga2/pki/${ICINGA2_NODENAME}.key"
-  ca_path = SysconfDir + "/icinga2/pki/ca.crt"
  accept_commands = true
  accept_config = true
}

Test the script with a fresh client installation before putting it into production.

Tip

Please support module and script developers in their migration. If you find any project which would require these changes, create an issue or a patchset in a PR and help them out. Thanks in advance!

On-Demand Signing and CA Proxy

Icinga 2 v2.8 supports the following features inside the cluster:

Forward signing requests from clients through a satellite instance to a signing master ("CA Proxy").
Signing requests without a ticket. The master instance allows to list and sign CSRs ("On-Demand Signing").

In order to use these features, all instances must be upgraded to v2.8.

More details in this chapter.

Removed Bottom Up Client Mode

This client mode was deprecated in 2.6 and was removed in 2.8.

The node CLI command does not provide list or update-config anymore.

Note

The old migration guide can be found on GitHub.

The clients don't need to have a local conf.d directory included.

Icinga 2 continues to run with the generated and imported configuration. You are advised to migrate any existing configuration to the "top down" mode with the help of the Icinga Director or config management tools such as Puppet, Ansible, etc.

Removed Classic UI Config Package

The config meta package classicui-config and the configuration files have been removed. You need to manually configure this legacy interface. Create a backup of the configuration before upgrading and re-configure it afterwards.

Flapping Configuration

Icinga 2 v2.8 implements a new flapping detection algorithm which splits the threshold configuration into low and high settings.

flapping_threshold is deprecated and does not have any effect when flapping is enabled. Please remove flapping_threshold from your configuration. This attribute will be removed in v2.9.

Instead you need to use the flapping_threshold_low and flapping_threshold_high attributes. More details can be found here.

Deprecated Configuration Attributes

Object	Attribute
ApiListener	cert_path (migration happens)
ApiListener	key_path (migration happens)
ApiListener	ca_path (migration happens)
Host, Service	flapping_threshold (has no effect)

Upgrading to v2.7

v2.7.0 provided new notification scripts and commands. Please ensure to update your configuration accordingly. An advisory has been published here.

In case are having troubles with OpenSSL 1.1.0 and the public CA certificates, please read this advisory and check the troubleshooting chapter.

If Icinga 2 fails to start with an empty reference to $ICINGA2_CACHE_DIR ensure to set it inside /etc/sysconfig/icinga2 (RHEL) or /etc/default/icinga2 (Debian).

RPM packages will put a file called /etc/sysconfig/icinga2.rpmnew if you have modified the original file.

Example on CentOS 7:

vim /etc/sysconfig/icinga2

ICINGA2_CACHE_DIR=/var/cache/icinga2

systemctl restart icinga2

Upgrading the MySQL database

If you want to upgrade an existing Icinga 2 instance, check the /usr/share/icinga2-ido-mysql/schema/upgrade directory for incremental schema upgrade file(s).

Note

If there isn't an upgrade file for your current version available, there's nothing to do.

Apply all database schema upgrade files incrementally.

# mysql -u root -p icinga < /usr/share/icinga2-ido-mysql/schema/upgrade/<version>.sql

The Icinga 2 DB IDO feature checks the required database schema version on startup and generates an log message if not satisfied.

Example: You are upgrading Icinga 2 from version 2.4.0 to 2.8.0. Look into the upgrade directory:

$ ls /usr/share/icinga2-ido-mysql/schema/upgrade/
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

There are two new upgrade files called 2.5.0.sql, 2.6.0.sql and 2.8.0.sql which must be applied incrementally to your IDO database.

# mysql -u root -p icinga < /usr/share/icinga2-ido-mysql/schema/upgrade/2.5.0.sql
# mysql -u root -p icinga < /usr/share/icinga2-ido-mysql/schema/upgrade/2.6.0.sql
# mysql -u root -p icinga < /usr/share/icinga2-ido-mysql/schema/upgrade/2.8.0.sql

Upgrading the PostgreSQL database