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The This article instructs on using the EC2/RDS scheduler, which starts and stops EC2/RDS instances based on the `cloudaware:scheduler` tag value. Schedule The schedule tag value may consist of several fields separated by a spacespaces, with each field in the format `key=value`.

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IAM Policy

To provide grant Cloudaware with necessary permissions for instance start/stop schedule, apply the following Instance Scheduler policy in your AWS console:

Code Block

{
 "Version": "2012-10-17",
 "Statement": [
  {
   "Sid": "CaInstanceScheduler",
   "Effect": "Allow",
   "Action": [
    "ec2:DescribeInstances",
    "ec2:StartInstances",
    "ec2:StopInstances",
    "rds:DescribeDBInstances",
    "rds:ListTagsForResource",
    "rds:StartDBInstance",
    "rds:StopDBInstance"
   ],
   "Resource": [
    "*"
   ]
  }
 ]
}

The policy You can be also downloaded download the policy in your Cloudaware account: . For that, go to Admin → AWS Accounts → ADD AMAZON ACCOUNT → Using Access & Secret Keys → select Instance Scheduler in 'Please use one of thoseCLOUDAWARE IAM POLICIES'.

Tag Keys

The list of tag keys that are used to set up instance start/stop:

Key

Description

tz (required)

Timezone to be used by the scheduler. Use Area/Location style from IANA Time Zone Database:

Code Block
tz=America/New_York

default (required)

Default instance work hours. Can be either numeric or range with a hyphen separated by

the

slashes /.

It also can be the word off which mean that

Use off to specify that the instance should be stopped all that day or on

which mean

to specify that the instance should be running. The work hours should be specified in 24-hour format.

mon, tue, wed, thu, fri, sat, sun (optional)

Instance work hours for the current day.

Format

The format is the same as the key default.

Example 1. Work hours:

Code Block
default=9-16 sat=off sun=off

Instance

The instance will

be running

run from 9:00 to 16:59 all days, except Saturday and Sunday.

Example 2. Work hours:

Code Block
default=off wed=9/14-17

Instance

The instance will

be running

run only on Wednesday from 9:00 to 9:59 and from 14:00 to 17:59.

policy (optional)

Scheduler mode. Can be start_at_time or stop_at_time

which mean

, meaning that the scheduler will check and change the instance status only at the time defined with keys default and mon .. sun.

Learn more about tagging resources in Cloudaware here.

Tag Examples

Code Block
tz=America/New_York default=9-17 sat=9-11/15-17 sun=off tz=America/New_York

Description:

...

New York (EST);

instance work hours	from Monday to Friday: `9:00-17:59`; Saturday: `9:00-11:59` and `15:00-17:59`; Sunday: completely off;
schedule timezone	New York (EST);

Use the 'default=off' to specify exceptions in work hours for an instance. The instance will be off all time, except for specific periods, for example:

Code Block
default=off wed=0-5 tz=America/New_York

Description:

instance work hours	Wednesday: `00:00-5:59`;
schedule timezone	New York (EST);

To configure an instance to operate only from 8 AM to 6 PM on weekdays and remain off during nights and weekends, use the following schedule:

Code Block
mon=8-18 tue=8-18 wed=8-18 thu=8-18 fri=8-18 sat=off sun=off default=off

...

tz=America/New_York

Description:

instance work hours	from Monday to Friday: `8:00-18:59`; Saturday-Sunday: off
schedule timezone	New York (EST);

For instances that operate across midnight, configure a sophisticated scheduling pattern. For example, if an instance runs from Monday through Friday, operating from midnight to 2 AM and again from 10 PM to midnight, the configuration may be:

Code Block
mon=0-2/22-24 tue=0-2/22-24 wed=0-2/22-24 thu=0-2/22-24 fri=0-2/22-24 sat=off sun=off default=off tz=America/New_York

Description:

instance work hours

Wednesday

from Monday to Friday: 0:00-2:00

-5:59;

and `22-0:00`; Saturday-Sunday: off
schedule timezone	New York (EST);

This approach allows for precise control over resource utilization and cost management.

Versions Compared

Old Version 9

New Version Current

Key

IAM Policy

Tag Keys

Tag Examples