Dump EC2 instances that do not have SSM PingStatus of 'Online'

ssm_offline_instances.py

import boto3
import json

region = "us-gov-west-1"

all_instance_ids = [
    i.id for i in boto3.resource("ec2", region_name=region).instances.all()
]

ssm_inst_paginator = boto3.client("ssm", region_name=region).get_paginator(
    "describe_instance_information"
)
ssm_paginate_params = {
    "InstanceInformationFilterList": [{"key": "PingStatus", "valueSet": ["Online"]}]
}
["InstanceInformationList"]
online_instance_ids = []
for page in ssm_inst_paginator.paginate(**ssm_paginate_params):
    online_instance_ids += [i["InstanceId"] for i in page["InstanceInformationList"]]

offline_instance_ids = list(set(all_instance_ids) - set(online_instance_ids))

ec2_inst_paginator = boto3.client("ec2", region_name=region).get_paginator(
    "describe_instances"
)
offline_instance_details = []
for page in ec2_inst_paginator.paginate(InstanceIds=offline_instance_ids):
    for r in page["Reservations"]:
        offline_instance_details += r["Instances"]

print(
    json.dumps(
        {
            "all_instance_ids": all_instance_ids,
            "online_instance_ids": online_instance_ids,
            "offline_instance_ids": offline_instance_ids,
            "offline_instance_details": offline_instance_details,
        },
        indent=2,
        default=str,
    )
)