How to deploy an application with a specific series
Contents:
Charmed operators and series
Charmed operators can be created that support more than one release of a given operating system distro, such as the multiple Ubuntu releases shown below. It is not possible to create a charmed operator to support multiple distros, such as one charmed operator for both Ubuntu and CentOS. Supported series are added to the charmed operator metadata like this:
name: mycharm
summary: "Great software"
description: It works
maintainer: Some One <some.one@example.com>
categories:
- databases
series:
- jammy
- focal
provides:
db:
interface: pgsql
requires:
syslog:
interface: syslog
optional: true
The default series for the charmed operator is the first one listed. So, in this example, to deploy mycharm
on jammy
, all you need is:
juju deploy mycharm
You can specify a different series using the --series
flag:
juju deploy mycharm --series focal
You can force the charmed operator to deploy using an unsupported series using the --force
flag:
juju deploy mycharm --series bionic --force
Here is a more complete example showing a new machine being added that uses a different series than is supported by our mycharm
example and then forcing the charmed operator to install:
juju add-machine --series bionic
juju deploy mycharm --to 1 --series bionic --force
Multi-series charmed operators may encounter upgrade difficulties if support for the installed series is dropped. See Forced upgrades for details.
The series resolution order for charms:
- the ‘–series’ option provided with the
juju deploy
command - the series stated in the charmed operator URL, e.g.
bionic/postgresql
- the ‘default-series’ model key
- the top-most series specified in the charm’s metadata file
Bundles and series
The series resolution order for bundles:
- the ‘–series’ option provided with the
juju deploy
command - the series stated in each charmed operator URL in the bundle file
- the series given at the top level in the bundle file
- the ‘default-series’ model key
Last updated 5 months ago.