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28 lines
1.4 KiB
Bash
28 lines
1.4 KiB
Bash
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#!/bin/bash
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set -x
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# get all the node's ec2 instance ids for the specified chain id
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chain_node_instance_ids=$(aws ec2 describe-instances --filters "Name=tag:KavaChainId,Values=$CHAIN_ID" | jq -r '[.Reservations | .[] | .Instances | .[] | .InstanceId] | join(" ")')
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for chain_node_instance_id in ${chain_node_instance_ids}
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do
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autoscaling_group_state=$(aws autoscaling describe-auto-scaling-instances --instance-ids "$chain_node_instance_id" | jq -r '[.AutoScalingInstances | .[].LifecycleState] | join(" ")')
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# Possible states: https://docs.aws.amazon.com/autoscaling/ec2/userguide/ec2-auto-scaling-lifecycle.html
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case "$autoscaling_group_state" in
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InService)
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# place the nodes on standby so they won't get terminated
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# by the autoscaling group during the time
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# they are offline for a deploy / upgrade
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autoscaling_group_name=$(aws autoscaling describe-auto-scaling-instances --instance-ids "$chain_node_instance_id" | jq -r '[.AutoScalingInstances | .[].AutoScalingGroupName] | join(" ")')
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aws autoscaling enter-standby \
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--instance-ids "$chain_node_instance_id" \
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--auto-scaling-group-name "$autoscaling_group_name" \
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--should-decrement-desired-capacity
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;;
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*)
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echo "instance ($chain_node_instance_id) not in an elgible state ($autoscaling_group_state) for going on standby, skipping"
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;;
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esac
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done
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