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step-function.json
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step-function.json
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{
"Comment": "A open source module to taint/drain eks worker nodes gracefully",
"StartAt": "Put node to standby",
"States": {
"Put node to standby": {
"Comment": "Putting worker node to standby",
"Type": "Task",
"Resource": "${put-nodes-to-standby-lambda-arn}",
"Next": "taint the node"
},
"taint the node": {
"Comment": "Putting a unschedulable taint on the standby node",
"Type": "Task",
"Resource": "${taint-nodes-lambda-arn}",
"Next": "Wait 100 sec"
},
"Wait 100 sec": {
"Comment": "Putting a wait for 100 seconds",
"Type": "Wait",
"Seconds": 100,
"Next": "Check for pods"
},
"Check for pods": {
"Comment": "Checking for Running pods based on the label selector",
"Type": "Task",
"Resource": "${check-nodes-forrunning-pods-lambda-arn}",
"Next": "All active pods gone?"
},
"All active pods gone?": {
"Comment": "Checking for active pod count from last step, if it is 0 then terminate else wait",
"Type": "Choice",
"Choices": [
{
"Variable": "$.activePodCount",
"NumericEquals": 0,
"Next": "Yes-Terminate the node"
},
{
"Variable": "$.activePodCount",
"NumericGreaterThan": 0,
"Next": "No-Let's Wait"
}
]
},
"Yes-Terminate the node": {
"Type": "Pass",
"Next": "Terminate the node"
},
"No-Let's Wait": {
"Type": "Pass",
"Next": "Wait 100 sec"
},
"Terminate the node": {
"Type": "Task",
"Resource": "${detach-and-terminate-node-lambda-arn}",
"End": true
}
}
}