runScriptOnInstance.sh

#!/usr/bin/env bash
set -euo pipefail

COMPARTMENT_ID="ocid1.compartment.oc1.."
TIMEOUT_SECONDS=60


# Pull only running instances in the compartment.
oci compute instance list \
  --compartment-id "$COMPARTMENT_ID" \
  --query 'data[?"lifecycle-state"==`RUNNING`].id' \
  --raw-output | tr -d '[]",' | while read -r INSTANCE_ID; do
    [ -z "$INSTANCE_ID" ] && continue

    echo "Checking Compute Instance Run Command plugin status for $INSTANCE_ID"
    RUN_COMMAND_STATUS=$(oci instance-agent plugin list \
      --compartment-id "$COMPARTMENT_ID" \
      --instanceagent-id "$INSTANCE_ID" \
      --query 'data[?name==`Compute Instance Run Command`].status | [0]' \
      --raw-output)

    if [ "$RUN_COMMAND_STATUS" != "RUNNING" ]; then
      echo "Skipping $INSTANCE_ID: Compute Instance Run Command status is '$RUN_COMMAND_STATUS'"
      continue
    fi

    printf -v TARGET '{\n  "instanceId": "%s"\n}' "$INSTANCE_ID"
    #echo $TARGET   

    COMMAND_ID=$(oci instance-agent command create \
      --compartment-id "$COMPARTMENT_ID" \
      --display-name "Uptime check for $INSTANCE_ID" \
      --content file://content.json \
      --target "$TARGET" \
      --timeout-in-seconds "$TIMEOUT_SECONDS" \
      --query "data.id" \
      --raw-output)

    echo "Created command: $COMMAND_ID for instance: $INSTANCE_ID"

    oci instance-agent command-execution get \
      --command-id "$COMMAND_ID" \
      --instance-id "$INSTANCE_ID" \
      --raw-output
done