Bash script for Instance Pool Lifecycle Management

This script will create a new image, a new instance configuration based on the new image and update the current instance pool with the new instance configuration.

After that, we can run recycle_instances.sh to recycle all the instances. See my previous post for details.

instance-config-ords-as-template.json

{
    "instanceType": "compute",
    "launchDetails": {
      "compartmentId": "{{compartmentId}}",
      "createVnicDetails": {
        "assignPublicIp": false
      },
      "metadata": {
        "ssh_authorized_keys": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDuPoZBbXjC/5ojt+ECoIj5KGmLHWPPreWcjkp/1metOBgRv8f6W7w615+kRcrrdtyB5Tk6MzIs6CmF8RZ1BkkSankhHG62aKkqXn7T9VDenvEHaJpJqQRkhkYzJKyYqL+04O942gSgv8Kpw1IpFWvznfelf30xaxQzcLa0tMjYvOmqTmeAndEM3E1ZVMcEq3r3OlTTjCyfBPsdRPV2hFClvQziueRrUF61lhLotPUkCKxc6Iie+OpqW5hhU8vypFT0MAB6hoTH7EO7BGmQWInQlO3Pt4m7q9dNSee731TzRceDFa5cC/uigeAFgjEY8lwM5CFrcgMW3n3B3BpfumQv PC@PCLAPPY"
      },
        "shape": "VM.Standard.E3.Flex",
        "shapeConfig": {
          "memoryInGBs": 16.0,
          "ocpus": 1.0
        },
        "sourceDetails":   {
          "bootVolumeSizeInGBs": null,
          "imageId": "{{imageId}}",
          "sourceType": "image"
        }
    }
}

update_instance_pool_image_part2_template.txt

#!/usr/bin/bash

COMPARTMENT_OCID="{{compartmentId}}"
INSTANCE_POOL_OCID="{{instancepoolId}}"
INSTANCE_CONFIG_JSON="{{INSTANCE_CONFIG_JSON}}"
INSTANCE_CONFIG_NAME="{{INSTANCE_CONFIG_NAME}}"

INSTANCE_CONFIG_OCID=`oci compute-management instance-configuration create --compartment-id $COMPARTMENT_OCID --instance-details file://$INSTANCE_CONFIG_JSON --display-name $INSTANCE_CONFIG_NAME | jq -r '.data.id'`
sleep 30
oci compute-management instance-pool update --wait-for-state RUNNING --instance-pool-id $INSTANCE_POOL_OCID --instance-configuration-id $INSTANCE_CONFIG_OCID

update_instance_pool_image_part1.sh

#!/usr/bin/bash

COMPARTMENT_OCID="ocid1.compartment.oc1..aaaaaaaarocn3npultgruh5iwghhvor6s3kairokq4mil5bp52va6qkk7x6a"
INSTANCE_POOL_OCID="ocid1.instancepool.oc1.ca-toronto-1.aaaaaaaaswx6wld7z77u32shwivedvgn5usofurtjzfd3kdnfopbi56wqlfa"
INSTANCE_OCID="ocid1.instance.oc1.ca-toronto-1.an2g6ljrmpjzp2icj3zh7m5ndqp365ahhxv5j2b2u4t7omixuugdqwojymsq"

DATETIME=`date +"%Y-%m%d-%H%M"`
IMAGE_NAME="ords-as_"$DATETIME
INSTANCE_CONFIG_JSON="instance-config-ords-as_"$DATETIME".json"
INSTANCE_CONFIG_NAME="instance-config-ords-as_"$DATETIME
UPDATE_INSTANCE_POOL_SCRIPT="update_instance_pool_image_part2.sh"

sed "s/{{INSTANCE_CONFIG_JSON}}/$INSTANCE_CONFIG_JSON/g;s/{{INSTANCE_CONFIG_NAME}}/$INSTANCE_CONFIG_NAME/g;s/{{compartmentId}}/$COMPARTMENT_OCID/g;s/{{instancepoolId}}/$INSTANCE_POOL_OCID/g" update_instance_pool_image_part2_template.txt > $UPDATE_INSTANCE_POOL_SCRIPT
chmod 755 $UPDATE_INSTANCE_POOL_SCRIPT

IMAGE_OCID=`oci compute image create --compartment-id $COMPARTMENT_OCID --instance-id $INSTANCE_OCID --display-name $IMAGE_NAME | jq -r '.data.id'`

sed "s/{{imageId}}/$IMAGE_OCID/g;s/{{compartmentId}}/$COMPARTMENT_OCID/g" instance-config-ords-as-template.json > $INSTANCE_CONFIG_JSON

echo "Custom Image $IMAGE_NAME created. This instance will be taken offline for several minutes during the imaging process. Run update_pool_instance_image_part2.sh when instance come back online."

update_instance_pool_image_part2.sh

#!/usr/bin/bash

COMPARTMENT_OCID="ocid1.compartment.oc1..aaaaaaaarocn3npultgruh5iwghhvor6s3kairokq4mil5bp52va6qkk7x6a"
INSTANCE_POOL_OCID="ocid1.instancepool.oc1.ca-toronto-1.aaaaaaaaswx6wld7z77u32shwivedvgn5usofurtjzfd3kdnfopbi56wqlfa"
INSTANCE_CONFIG_JSON="instance-config-ords-as_2021-0308-0731.json"
INSTANCE_CONFIG_NAME="instance-config-ords-as_2021-0308-0731"

INSTANCE_CONFIG_OCID=`oci compute-management instance-configuration create  --compartment-id $COMPARTMENT_OCID --instance-details file://$INSTANCE_CONFIG_JSON --display-name $INSTANCE_CONFIG_NAME | jq -r '.data.id'`
sleep 30
oci compute-management instance-pool update --wait-for-state RUNNING --instance-pool-id $INSTANCE_POOL_OCID --instance-configuration-id $INSTANCE_CONFIG_OCID