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ssm-agent.sh
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ssm-agent.sh
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#!/bin/bash
if [ -z "${BASTION_ROLE_NAME}" ] || [ -z "${BASTION_INSTANCE_NAME}" ]; then
echo "ERROR: Some variables are not found. Please set BASTION_ROLE_NAME and BASTION_INSTANCE_NAME." >&2
exit 1
fi
function activate(){
echo "start activate process ..."
activation=$(aws ssm create-activation --default-instance-name "${BASTION_INSTANCE_NAME}" --iam-role "${BASTION_ROLE_NAME}" --output text)
SSM_AGENT_CODE=$(echo $activation | cut -f 1 -d ' ')
SSM_AGENT_ID=$(echo $activation | cut -f 2 -d ' ')
}
function shutdown(){
echo "start shutdown process ..."
instance_id=$(cat /var/lib/amazon/ssm/registration | jq -r .ManagedInstanceID)
aws ssm deregister-managed-instance --instance-id $instance_id
kill $(pgrep amazon-ssm)
echo "shutdown process completed."
}
function start(){
amazon-ssm-agent -register -code "${SSM_AGENT_CODE}" -id "${SSM_AGENT_ID}" -region "ap-northeast-1"
aws ssm delete-activation --activation-id "${SSM_AGENT_ID}"
amazon-ssm-agent start &
echo "activate process completed. ssm-agent has started."
}
## main process
trap shutdown TERM
activate
start
while true
do
wait
done