awsflow-cloudwatch

name	awsflow-cloudwatch
description	Query and manage CloudWatch log groups, streams, events, run Insights queries, inspect metric filters and subscriptions, and open the interactive log viewer using awsflow. Find logs from Lambda, API Gateway, Glue, RDS, ECS, Step Functions, and other AWS services.

Awsflow CloudWatch Logs

Query and manage CloudWatch log groups, streams, events, run Insights queries, and open the interactive log viewer.

When to Use This Skill

Use this skill when the user:

• Asks about CloudWatch logs or log groups
• Wants to search log events or filter by pattern
• Needs to run CloudWatch Insights queries
• Wants to find logs from Lambda, API Gateway, Glue, or other services
• Needs to inspect metric filters, subscriptions, or query definitions
• Wants to open the interactive CloudWatch Log Viewer
• Needs to create, delete, or tag log groups and log streams
• Needs to configure retention policies or resource policies

Tool: CloudWatchLogTool

Execute CloudWatch Logs commands including Insights queries. ALWAYS provide params object.

Commands

DescribeLogGroups

List log groups with optional prefix filter.

{ "command": "DescribeLogGroups", "params": { "logGroupNamePrefix": "/aws/lambda/", "limit": 50 } }

Parameters:

Parameter	Type	Required	Description
logGroupNamePrefix	string	No	Prefix filter for log group names
limit	number	No	Maximum items to return
nextToken	string	No	Pagination token

DescribeLogStreams

List log streams in a log group.

{ "command": "DescribeLogStreams", "params": { "logGroupName": "/aws/lambda/my-function", "orderBy": "LastEventTime", "descending": true, "limit": 10 } }

Parameters:

Parameter	Type	Required	Description
logGroupName	string	Yes	Target log group name
logStreamNamePrefix	string	No	Prefix filter for stream names
orderBy	string	No	LogStreamName or LastEventTime
descending	boolean	No	Sort in descending order
limit	number	No	Maximum items to return
nextToken	string	No	Pagination token

GetLogEvents

Get log events from a specific stream.

{ "command": "GetLogEvents", "params": { "logGroupName": "/aws/lambda/my-function", "logStreamName": "2024/01/01/[$LATEST]abc123", "limit": 100 } }

Parameters:

Parameter	Type	Required	Description
logGroupName	string	Yes	Target log group name
logStreamName	string	Yes	Target log stream name
startTime	number	No	Start time in epoch milliseconds
endTime	number	No	End time in epoch milliseconds
startFromHead	boolean	No	Start from the beginning of the stream
limit	number	No	Maximum events to return
nextToken	string	No	Pagination token

FilterLogEvents

Search/filter log events across streams in a log group.

{ "command": "FilterLogEvents", "params": { "logGroupName": "/aws/lambda/my-function", "filterPattern": "ERROR" } }

Parameters:

Parameter	Type	Required	Description
logGroupName	string	Yes	Target log group name
filterPattern	string	No	Search pattern (e.g., ERROR, "status code: 500", { $.level = "ERROR" })
startTime	number	No	Start time in epoch milliseconds
endTime	number	No	End time in epoch milliseconds
interleaved	boolean	No	Return interleaved results from multiple streams
nextToken	string	No	Pagination token
limit	number	No	Maximum events to return

StartQuery

Start a CloudWatch Insights query.

{
  "command": "StartQuery",
  "params": {
    "logGroupName": "/aws/lambda/my-function",
    "queryString": "fields @timestamp, @message | filter @message like /ERROR/ | sort @timestamp desc | limit 20",
    "startTime": 1704067200000,
    "endTime": 1704153600000
  }
}

Parameters:

Parameter	Type	Required	Description
logGroupName	string	No	Single log group name
logGroupNames	array of strings	No	Multiple log group names to query
logGroupIdentifiers	array of strings	No	Log group identifiers
queryString	string	Yes	CloudWatch Insights query string
startTime	number	Yes	Start time in epoch milliseconds
endTime	number	Yes	End time in epoch milliseconds
maxQueryResults	number	No	Maximum number of query results

GetQueryResults

Get results of a CloudWatch Insights query.

{ "command": "GetQueryResults", "params": { "queryId": "12345678-1234-1234-1234-123456789012" } }

Parameters:

Parameter	Type	Required	Description
queryId	string	Yes	Query ID returned by StartQuery

GetLogGroupFields

Discover fields in a log group for Insights queries.

{ "command": "GetLogGroupFields", "params": { "logGroupName": "/aws/lambda/my-function" } }

Parameters:

Parameter	Type	Required	Description
logGroupName	string	Yes	Target log group name
time	number	No	Time in epoch milliseconds for field discovery

DescribeMetricFilters

List metric filters for a log group.

{ "command": "DescribeMetricFilters", "params": { "logGroupName": "/aws/lambda/my-function" } }

Parameters:

Parameter	Type	Required	Description
logGroupName	string	No	Target log group name
filterNamePrefix	string	No	Metric filter name prefix
metricName	string	No	Metric name
metricNamespace	string	No	Metric namespace

DescribeQueryDefinitions

List saved CloudWatch Insights query definitions.

{ "command": "DescribeQueryDefinitions", "params": {} }

Parameters:

Parameter	Type	Required	Description
maxQueryResults	number	No	Maximum results

DescribeSubscriptionFilters

List subscription filters for a log group.

{ "command": "DescribeSubscriptionFilters", "params": { "logGroupName": "/aws/lambda/my-function" } }

Parameters:

Parameter	Type	Required	Description
logGroupName	string	Yes	Target log group name

DescribeDestinations

List log destinations.

{ "command": "DescribeDestinations", "params": {} }

Parameters:

Parameter	Type	Required	Description
destinationNamePrefix	string	No	Destination name prefix

CreateLogGroup

Create a new log group.

{ "command": "CreateLogGroup", "params": { "logGroupName": "/aws/lambda/new-func" } }

CreateLogStream

Create a new log stream in a log group.

{ "command": "CreateLogStream", "params": { "logGroupName": "/aws/lambda/new-func", "logStreamName": "manual" } }

PutLogEvents

Put log events to a log stream.

{ "command": "PutLogEvents", "params": { "logGroupName": "/aws/lambda/new-func", "logStreamName": "manual", "logEvents": [{ "timestamp": 1704067200000, "message": "hello" }] } }

PutRetentionPolicy

Set retention policy for a log group.

{ "command": "PutRetentionPolicy", "params": { "logGroupName": "/aws/lambda/new-func", "retentionInDays": 30 } }

PutMetricFilter

Create or update a metric filter.

{ "command": "PutMetricFilter", "params": { "logGroupName": "/aws/lambda/new-func", "filterName": "ErrorCount", "filterPattern": "ERROR", "metricTransformations": [{ "metricName": "ErrorCount", "metricNamespace": "App", "metricValue": "1" }] } }

PutSubscriptionFilter

Create or update a subscription filter.

{ "command": "PutSubscriptionFilter", "params": { "logGroupName": "/aws/lambda/new-func", "filterName": "to-kinesis", "filterPattern": "", "destinationArn": "arn:aws:kinesis:..." } }

PutResourcePolicy

Create or update a resource policy.

{ "command": "PutResourcePolicy", "params": { "policyName": "cw-policy", "policyDocument": "{\"Version\":\"2012-10-17\",\"Statement\":[{\"Effect\":\"Allow\",\"Principal\":\"*\",\"Action\":[\"logs:PutLogEvents\"],\"Resource\":[\"*\"]}]}" } }

DeleteLogGroup

Delete a log group.

{ "command": "DeleteLogGroup", "params": { "logGroupName": "/aws/lambda/old-func" } }

DeleteLogStream

Delete a log stream.

{ "command": "DeleteLogStream", "params": { "logGroupName": "/aws/lambda/new-func", "logStreamName": "manual" } }

DeleteMetricFilter

Delete a metric filter.

{ "command": "DeleteMetricFilter", "params": { "logGroupName": "/aws/lambda/new-func", "filterName": "ErrorCount" } }

DeleteSubscriptionFilter

Delete a subscription filter.

{ "command": "DeleteSubscriptionFilter", "params": { "logGroupName": "/aws/lambda/new-func", "filterName": "to-kinesis" } }

DeleteRetentionPolicy

Remove retention policy (reverts to Never Expire).

{ "command": "DeleteRetentionPolicy", "params": { "logGroupName": "/aws/lambda/new-func" } }

DeleteResourcePolicy

Delete a resource policy.

{ "command": "DeleteResourcePolicy", "params": { "policyName": "cw-policy" } }

TagLogGroup

Tag a log group.

{ "command": "TagLogGroup", "params": { "logGroupName": "/aws/lambda/new-func", "tags": { "env": "prod" } } }

UntagLogGroup

Remove tags from a log group.

{ "command": "UntagLogGroup", "params": { "logGroupName": "/aws/lambda/new-func", "tagKeys": ["env"] } }

OpenCloudWatchLogView

Open the interactive CloudWatch Log Viewer in VS Code.

{ "command": "OpenCloudWatchLogView", "params": { "logGroupName": "/aws/lambda/my-function", "logStreamName": "2024/01/01/[$LATEST]abc123" } }

Parameters:

Parameter	Type	Required	Description
logGroupName	string	Yes	Log group name to open
logStreamName	string	No	Specific log stream to open

---

CloudWatch Log Group Naming Conventions

Use these patterns to find logs from specific AWS services:

AWS Service	Log Group Pattern	Example
Lambda	/aws/lambda/{functionName}	/aws/lambda/my-api-handler
API Gateway	API-Gateway-Execution-Logs_{restApiId}/{stageName}	API-Gateway-Execution-Logs_abc123/prod
Glue	/aws-glue/jobs/output	/aws-glue/jobs/output
Glue	/aws-glue/jobs/error	/aws-glue/jobs/error
Glue Crawlers	/aws-glue/crawlers	/aws-glue/crawlers
RDS	/aws/rds/instance/{instanceId}/{logType}	/aws/rds/instance/mydb/error
RDS Aurora	/aws/rds/cluster/{clusterId}/{logType}	/aws/rds/cluster/mycluster/audit
ECS	/ecs/{serviceName} or custom	/ecs/my-service
Step Functions	/aws/vendedlogs/states/{name}	/aws/vendedlogs/states/MyStateMachine
CloudTrail	aws-cloudtrail-logs-{accountId}-{hash}	aws-cloudtrail-logs-123456789012-abcdef
VPC Flow Logs	Custom (check EC2 flow log config)	/vpc/flow-logs
AppSync	/aws/appsync/apis/{apiId}	/aws/appsync/apis/abc123
CodeBuild	/aws/codebuild/{projectName}	/aws/codebuild/my-build

Useful Insights Query Examples

Find errors across Lambda functions:

fields @timestamp, @message
| filter @message like /ERROR/
| sort @timestamp desc
| limit 50

Count errors by function:

stats count(*) as errorCount by @logStream
| filter @message like /ERROR/
| sort errorCount desc

Latency analysis:

filter @type = "REPORT"
| stats avg(@duration) as avgDuration, max(@duration) as maxDuration, min(@duration) as minDuration by bin(1h)

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Related Services

• CloudWatch → Lambda: Lambda logs at /aws/lambda/{functionName}. Use LambdaTool GetFunctionConfiguration to get function details
• CloudWatch → API Gateway: Execution logs at API-Gateway-Execution-Logs_{id}/{stage}. Use APIGatewayTool GetRestApis to find API IDs
• CloudWatch → Glue: Job logs at /aws-glue/jobs/output. Use GlueTool GetJobRuns to correlate job runs with log timestamps
• CloudWatch → RDS: Database logs at /aws/rds/instance/{id}/{type}. Use RDSTool DescribeDBInstances to find instance IDs
• CloudWatch → EC2: VPC Flow Logs deliver to CloudWatch. Use EC2Tool DescribeFlowLogs to find log group
• CloudWatch → Step Functions: Execution logs at /aws/vendedlogs/states/{name}. Use StepFuncTool to find state machine details