There are more AWS SDK examples available in the [AWS Doc SDK Examples](https://github.com/awsdocs/aws-doc-sdk-examples) GitHub repo.

# Use `CreateAssociation` with a CLI
<a name="ssm_example_ssm_CreateAssociation_section"></a>

The following code examples show how to use `CreateAssociation`.

------
#### [ CLI ]

**AWS CLI**  
**Example 1: To associate a document using instance IDs**  
This example associates a configuration document with an instance, using instance IDs.  

```
aws ssm create-association \
    --instance-id "i-0cb2b964d3e14fd9f" \
    --name "AWS-UpdateSSMAgent"
```
Output:  

```
{
    "AssociationDescription": {
        "Status": {
            "Date": 1487875500.33,
            "Message": "Associated with AWS-UpdateSSMAgent",
            "Name": "Associated"
        },
        "Name": "AWS-UpdateSSMAgent",
        "InstanceId": "i-0cb2b964d3e14fd9f",
        "Overview": {
            "Status": "Pending",
            "DetailedStatus": "Creating"
        },
        "AssociationId": "b7c3266e-a544-44db-877e-b20d3a108189",
        "DocumentVersion": "$DEFAULT",
        "LastUpdateAssociationDate": 1487875500.33,
        "Date": 1487875500.33,
        "Targets": [
            {
                "Values": [
                    "i-0cb2b964d3e14fd9f"
                ],
                "Key": "InstanceIds"
            }
        ]
    }
}
```
For more information, see [CreateAssociation](https://docs.aws.amazon.com/systems-manager/latest/APIReference/API_CreateAssociation.html) in the *AWS Systems Manager API Reference*.  
**Example 2: To associate a document using targets**  
This example associates a configuration document with an instance, using targets.  

```
aws ssm create-association \
    --name "AWS-UpdateSSMAgent" \
    --targets "Key=instanceids,Values=i-0cb2b964d3e14fd9f"
```
Output:  

```
{
    "AssociationDescription": {
        "Status": {
            "Date": 1487875500.33,
            "Message": "Associated with AWS-UpdateSSMAgent",
            "Name": "Associated"
        },
        "Name": "AWS-UpdateSSMAgent",
        "InstanceId": "i-0cb2b964d3e14fd9f",
        "Overview": {
            "Status": "Pending",
            "DetailedStatus": "Creating"
        },
        "AssociationId": "b7c3266e-a544-44db-877e-b20d3a108189",
        "DocumentVersion": "$DEFAULT",
        "LastUpdateAssociationDate": 1487875500.33,
        "Date": 1487875500.33,
        "Targets": [
            {
                "Values": [
                    "i-0cb2b964d3e14fd9f"
                ],
                "Key": "InstanceIds"
            }
        ]
    }
}
```
For more information, see [CreateAssociation](https://docs.aws.amazon.com/systems-manager/latest/APIReference/API_CreateAssociation.html) in the *AWS Systems Manager API Reference*.  
**Example 3: To create an association that runs only once**  
This example creates a new association that only runs once on the specified date and time. Associations created with a date in the past or present (by the time it is processed the date is in the past) run immediately.  

```
aws ssm create-association \
    --name "AWS-UpdateSSMAgent" \
    --targets "Key=instanceids,Values=i-0cb2b964d3e14fd9f" \
    --schedule-expression "at(2020-05-14T15:55:00)"  \
    --apply-only-at-cron-interval
```
Output:  

```
{
    "AssociationDescription": {
        "Status": {
            "Date": 1487875500.33,
            "Message": "Associated with AWS-UpdateSSMAgent",
            "Name": "Associated"
        },
        "Name": "AWS-UpdateSSMAgent",
        "InstanceId": "i-0cb2b964d3e14fd9f",
        "Overview": {
            "Status": "Pending",
            "DetailedStatus": "Creating"
        },
        "AssociationId": "b7c3266e-a544-44db-877e-b20d3a108189",
        "DocumentVersion": "$DEFAULT",
        "LastUpdateAssociationDate": 1487875500.33,
        "Date": 1487875500.33,
        "Targets": [
            {
                "Values": [
                    "i-0cb2b964d3e14fd9f"
                ],
                "Key": "InstanceIds"
            }
        ]
    }
}
```
For more information, see [CreateAssociation](https://docs.aws.amazon.com/systems-manager/latest/APIReference/API_CreateAssociation.html) in the *AWS Systems Manager API Reference* or [Reference: Cron and rate expressions for Systems Manager](https://docs.aws.amazon.com/systems-manager/latest/userguide/reference-cron-and-rate-expressions.html) in the *AWS Systems Manager User Guide*.  
+  For API details, see [CreateAssociation](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ssm/create-association.html) in *AWS CLI Command Reference*. 

------
#### [ PowerShell ]

**Tools for PowerShell V4**  
**Example 1: This example associates a configuration document with an instance, using instance IDs.**  

```
New-SSMAssociation -InstanceId "i-0cb2b964d3e14fd9f" -Name "AWS-UpdateSSMAgent"
```
**Output:**  

```
Name                  : AWS-UpdateSSMAgent
InstanceId            : i-0000293ffd8c57862
Date                  : 2/23/2017 6:55:22 PM
Status.Name           : Associated
Status.Date           : 2/20/2015 8:31:11 AM
Status.Message        : Associated with AWS-UpdateSSMAgent
Status.AdditionalInfo :
```
**Example 2: This example associates a configuration document with an instance, using targets.**  

```
$target = @{Key="instanceids";Values=@("i-0cb2b964d3e14fd9f")}
New-SSMAssociation -Name "AWS-UpdateSSMAgent" -Target $target
```
**Output:**  

```
Name                  : AWS-UpdateSSMAgent
InstanceId            :
Date                  : 3/1/2017 6:22:21 PM
Status.Name           :
Status.Date           :
Status.Message        :
Status.AdditionalInfo :
```
**Example 3: This example associates a configuration document with an instance, using targets and parameters.**  

```
$target = @{Key="instanceids";Values=@("i-0cb2b964d3e14fd9f")}
$params = @{
  "action"="configure"
  "mode"="ec2"
  "optionalConfigurationSource"="ssm"
  "optionalConfigurationLocation"=""
  "optionalRestart"="yes"
}
New-SSMAssociation -Name "Configure-CloudWatch" -AssociationName "CWConfiguration" -Target $target -Parameter $params
```
**Output:**  

```
Name                  : Configure-CloudWatch
InstanceId            :
Date                  : 5/17/2018 3:17:44 PM
Status.Name           :
Status.Date           :
Status.Message        :
Status.AdditionalInfo :
```
**Example 4: This example creates an association with all instances in the region, with `AWS-GatherSoftwareInventory`. It also provides custom files and registry locations in the parameters to collect**  

```
$params = [Collections.Generic.Dictionary[String,Collections.Generic.List[String]]]::new()
$params["windowsRegistry"] ='[{"Path":"HKEY_LOCAL_MACHINE\SOFTWARE\Amazon\MachineImage","Recursive":false,"ValueNames":["AMIName"]}]'
$params["files"] = '[{"Path":"C:\Program Files","Pattern":["*.exe"],"Recursive":true}, {"Path":"C:\ProgramData","Pattern":["*.log"],"Recursive":true}]' 
New-SSMAssociation -AssociationName new-in-mum -Name AWS-GatherSoftwareInventory -Target @{Key="instanceids";Values="*"} -Parameter $params -region ap-south-1 -ScheduleExpression "rate(720 minutes)"
```
**Output:**  

```
Name                  : AWS-GatherSoftwareInventory
InstanceId            :
Date                  : 6/9/2019 8:57:56 AM
Status.Name           :
Status.Date           :
Status.Message        :
Status.AdditionalInfo :
```
+  For API details, see [CreateAssociation](https://docs.aws.amazon.com/powershell/v4/reference) in *AWS Tools for PowerShell Cmdlet Reference (V4)*. 

**Tools for PowerShell V5**  
**Example 1: This example associates a configuration document with an instance, using instance IDs.**  

```
New-SSMAssociation -InstanceId "i-0cb2b964d3e14fd9f" -Name "AWS-UpdateSSMAgent"
```
**Output:**  

```
Name                  : AWS-UpdateSSMAgent
InstanceId            : i-0000293ffd8c57862
Date                  : 2/23/2017 6:55:22 PM
Status.Name           : Associated
Status.Date           : 2/20/2015 8:31:11 AM
Status.Message        : Associated with AWS-UpdateSSMAgent
Status.AdditionalInfo :
```
**Example 2: This example associates a configuration document with an instance, using targets.**  

```
$target = @{Key="instanceids";Values=@("i-0cb2b964d3e14fd9f")}
New-SSMAssociation -Name "AWS-UpdateSSMAgent" -Target $target
```
**Output:**  

```
Name                  : AWS-UpdateSSMAgent
InstanceId            :
Date                  : 3/1/2017 6:22:21 PM
Status.Name           :
Status.Date           :
Status.Message        :
Status.AdditionalInfo :
```
**Example 3: This example associates a configuration document with an instance, using targets and parameters.**  

```
$target = @{Key="instanceids";Values=@("i-0cb2b964d3e14fd9f")}
$params = @{
  "action"="configure"
  "mode"="ec2"
  "optionalConfigurationSource"="ssm"
  "optionalConfigurationLocation"=""
  "optionalRestart"="yes"
}
New-SSMAssociation -Name "Configure-CloudWatch" -AssociationName "CWConfiguration" -Target $target -Parameter $params
```
**Output:**  

```
Name                  : Configure-CloudWatch
InstanceId            :
Date                  : 5/17/2018 3:17:44 PM
Status.Name           :
Status.Date           :
Status.Message        :
Status.AdditionalInfo :
```
**Example 4: This example creates an association with all instances in the region, with `AWS-GatherSoftwareInventory`. It also provides custom files and registry locations in the parameters to collect**  

```
$params = [Collections.Generic.Dictionary[String,Collections.Generic.List[String]]]::new()
$params["windowsRegistry"] ='[{"Path":"HKEY_LOCAL_MACHINE\SOFTWARE\Amazon\MachineImage","Recursive":false,"ValueNames":["AMIName"]}]'
$params["files"] = '[{"Path":"C:\Program Files","Pattern":["*.exe"],"Recursive":true}, {"Path":"C:\ProgramData","Pattern":["*.log"],"Recursive":true}]' 
New-SSMAssociation -AssociationName new-in-mum -Name AWS-GatherSoftwareInventory -Target @{Key="instanceids";Values="*"} -Parameter $params -region ap-south-1 -ScheduleExpression "rate(720 minutes)"
```
**Output:**  

```
Name                  : AWS-GatherSoftwareInventory
InstanceId            :
Date                  : 6/9/2019 8:57:56 AM
Status.Name           :
Status.Date           :
Status.Message        :
Status.AdditionalInfo :
```
+  For API details, see [CreateAssociation](https://docs.aws.amazon.com/powershell/v5/reference) in *AWS Tools for PowerShell Cmdlet Reference (V5)*. 

------