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<\/a><\/p>\nSuppose we have to print all availability zones,<\/p>\n
aws ec2 describe-volumes –query ‘Volumes[*].AvailabilityZone<\/p>\n
Here, Here * is used to print all values of AvailabilityZone. If we want to print first value of AvailabilityZone or second value of AvailabilityZone than we can replace * by 0 or 1 respectively.<\/p>\n suppose we have to print all the values of Attachments<\/p>\n aws ec2 describe-volumes –query ‘Volumes[*].Attachments’<\/p>\n But, if we only want to print InstanceId<\/p>\n aws ec2 describe-volumes –query ‘Volumes[*].Attachments[*].InstanceId’<\/p>\n aws ec2 describe-volumes –query ‘Volumes[*].[Attachments[*].[VolumeId,InstanceId,State]]’<\/p>\n<\/a><\/p>\n
\naws ec2 describe-volumes : Shows descriptive information for one or more of your Amazon EBS volumes in a particular region
\n–query : to filter output
\n[] : array
\nAvailabilityZone : key whose value is ” us-east-1b us-east-1b”<\/p>\n<\/a><\/p>\n<\/a>
\nHere this query will print all the value of instansce id from the json file
\nby volume[*] we enter into the array of volumes
\nand by appending .attachments[*] to volumes[*] we drill down or enter into the attachment array and by appending .instanceid to .attachments we can get the desire values for the instance id. Again we can replace * in Attachments[*] with 0 or 1 to print first instance id or second instance id respectively.
\nWe can also get values of multiple parameters, like if we want to print InstanceId and State of the volume<\/p>\n