Charmscaler

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• alert_enabled | boolean

  Toggle e-mail alerts on/off

• alert_levels | string

  Default: INFO NOTICE WARN ERROR FATAL

  Alert levels that should trigger alert mails to be sent out

• alert_receivers | string

  Space separated list of e-mail addresses that should recieve alerts

• alert_sender | string

  E-mail address that alert mails should be sent from

• alert_smtp_host | string

  SMTP hostname

• alert_smtp_password | string

  Password to auth with the SMTP server

• alert_smtp_port | int

  Default: 25

  SMTP port

• alert_smtp_ssl | boolean

  Use SSL when connecting to SMTP host

• alert_smtp_username | string

  Username to auth with the SMTP server

• charmpool_url | string

  Default: http://charmpool:80

  URL to the Charmpool component. By default both the autoscaler and the pool is run in the same Docker network and will reach eachother by their local hostnames.

• docker-opts | string

  Extra options to pass to the docker daemon. e.g. --insecure-registry

• enable-cgroups | boolean

  Enable GRUB cgroup overrides cgroup_enable=memory swapaccount=1. WARNING changing this option will reboot the host - use with caution on production services

• http_proxy | string

  URL to use for HTTP_PROXY to be used by Docker. Only useful in closed environments where a proxy is the only option for routing to the registry to pull images

• https_proxy | string

  URL to use for HTTPS_PROXY to be used by Docker. Only useful in closed environments where a proxy is the only option for routing to the registry to pull images

• install_from_upstream | boolean

  Toggle installation from ubuntu archive vs the docker PPA

• juju_api_endpoint | string

  Juju controller API endpoint

• juju_model_uuid | string

  Juju model UUID

• juju_password | string

  Juju account password

• juju_refresh_interval | int

  Default: 5

  How often the charmscaler should sync against the Juju model.

• juju_username | string

  Juju account username

• metric_data_settling_interval | int

  Default: 15

  The minimum age (in seconds) of requested data points. When requesting recent aggregate metric data points, there is always a risk of seeing partial/incomplete results before metric values from all sources have been registered. The value to set for this field depends on the reporting frequency of monitoring agents, but as a general rule-of-thumb, this value can be set to be about 1.5 times the length of the reporting-interval for monitoring agents.

• metric_poll_interval | int

  Default: 10

  Seconds between polls for new metric values

• nagios_context | string

  Default: juju

  Used by the nrpe subordinate charms. A string that will be prepended to instance name to set the host name in nagios. So for instance the hostname would be something like: juju-myservice-0 If you're running multiple environments with the same services in them this allows you to differentiate between them.

• nagios_servicegroups | string

  A comma-separated list of nagios servicegroups. If left empty, the nagios_context will be used as the servicegroup

• name | string

  Default: CharmScaler

  The name of the service - mainly shows up in the alert e-mails Also useful to distinguish between multiple CharmScaler charms

• no_proxy | string

  Comma-separated list of destinations (either domain names or IP addresses) that should be directly accessed, by opposition of going through the proxy defined above.

• port_autoscaler | int

  Default: 8097

  Port which the Autoscaler API should be served on.

• scaling_cooldown | int

  Default: 300

  Time (in seconds) before making another scaling decision from the time of the last up- or downscale. This is useful to prevent extra resizes due to slow teardowns or, in perticular, upstarts.

• scaling_cpu_max | int

  Default: 80

  CPU usage threshold at which the number of units should be scaled up.

• scaling_cpu_min | int

  Default: 20

  CPU threshold where the load is considered low enough to scale down the number of units.

• scaling_interval | int

  Default: 10

  Seconds between each scaling decision

• scaling_period_downscale | int

  Default: 120

  Number of seconds that the CPU usage needs to be lower than the threshold before scaling down.

• scaling_period_upscale | int

  Default: 60

  Number of seconds that the CPU usage needs to be higher than the threshold before scaling up.

• scaling_units_max | int

  Default: 4

  Maximum amount of units to keep in pool

• scaling_units_min | int

  Default: 1

  Minimum amount of units to keep in pool