fix: simplify runner scripts

Dockerfile

@@ -22,11 +22,8 @@ EXPOSE 8081
 
 CMD npm run start
 
-
 FROM base as runner
 
-ENV CAS_PATH=/cas
-
 # For running on AWS ECS
 ENV AWS_REGION=${AWS_REGION}
 ENV AWS_ACCESS_KEY_ID=${AWS_ACCESS_KEY_ID}
@@ -38,18 +35,12 @@ ENV AWS_ECS_FAMILY=${AWS_ECS_FAMILY}
 ENV DISCORD_WEBHOOK_URL=${DISCORD_WEBHOOK_URL}
 ENV CLOUDWATCH_LOG_BASE_URL=${CLOUDWATCH_LOG_BASE_URL}
 
-WORKDIR /runner
-
-COPY runner/package*.json runner/*.js ./
-
-RUN npm install
-
-WORKDIR /
-
-COPY entrypoint.sh .
-RUN chmod +x ./entrypoint.sh
+WORKDIR /cas
 
-COPY runner.sh .
+COPY runner ./runner
+COPY runner.sh ./
+COPY entrypoint.sh ./
+RUN chmod +x ./runner.sh ./entrypoint.sh
 
 ENTRYPOINT ["./entrypoint.sh"]
 CMD [ "./runner.sh" ]

runner.sh

@@ -5,13 +5,13 @@ echo $LOGS
 
 LOGS=($LOGS)
 if [[ ${LOGS[0]} == "OK" ]]; then
-  cd $CAS_PATH && npm run start
+  npm run start
   exit_code=$?
   if [[ $exit_code != 0 ]]; then
-    cd $HOME && cd .. && node ./runner/report-failure.js
+    node ./runner/report-failure.js
     echo "Service exited with non-zero exit code"
   else
-    cd $HOME && cd .. && node ./runner/report-exit.js
+    node ./runner/report-exit.js
     echo "Service exited cleanly"
   fi
 else

runner/helpers.js

@@ -1,23 +1,22 @@
-import child_process from 'child_process'
 import * as https from 'https'
-import { ECSClient, ListTasksCommand } from '@aws-sdk/client-ecs'
 
 const REPORTING_LEVEL = {
   info: 'info',
-  error: 'error'
+  error: 'error',
 }
 
+const TASK_ID = process.env.INSTANCE_IDENTIFIER
+
 /**
  * Sends Discord message about ECS task
  * @param {any} messageWithoutFields
  */
 function reportTask(messageWithoutFields, reportingLevel = REPORTING_LEVEL.info) {
   console.log('Reporting ECS task...')
-  const taskId = getThisTaskId()
-  const fields = generateDiscordCloudwatchFields([taskId])
+  const fields = generateDiscordCloudwatchFields([TASK_ID])
   let message = messageWithoutFields
   if (fields.length > 0) {
-    message = [{...messageWithoutFields[0], fields}]
+    message = [{ ...messageWithoutFields[0], fields }]
   }
   const data = { embeds: message, username: 'cas-runner' }
   const retryDelayMs = 300000 // 300k ms = 5 mins
@@ -28,18 +27,6 @@ function reportTask(messageWithoutFields, reportingLevel = REPORTING_LEVEL.info)
   sendDiscordNotification(webhookUrl, data, retryDelayMs)
 }
 
-/**
- * Returns the ECS id for the running task
- * @returns {string}
- */
-function getThisTaskId() {
-  const taskId = child_process.execSync(
-    `curl -s "$ECS_CONTAINER_METADATA_URI_V4/task" | /runner/node_modules/node-jq/bin/jq -r ".TaskARN" | awk -F / '{print $NF}'`
-  ).toString()
-  console.log('TASK ID:', taskId)
-  return taskId
-}
-
 /**
  * Returns kv object for Discord fields
  * @param {Array<string>} taskIds
@@ -53,35 +40,6 @@ function generateDiscordCloudwatchFields(taskIds) {
   return fields
 }
 
-/**
- * Returns list of running ECS anchor tasks
- * @returns {Array<string>}
- */
-async function listECSTasks() {
-  const client = new ECSClient({
-    region: process.env.AWS_REGION,
-    credentials: {
-      accessKeyId: process.env.AWS_ACCESS_KEY_ID,
-      secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY,
-    },
-  })
-
-  const params = {
-    cluster: process.env.AWS_ECS_CLUSTER,
-    family: process.env.AWS_ECS_FAMILY,
-  }
-
-  const command = new ListTasksCommand(params)
-
-  const data = await client.send(command)
-
-  if (data.$metadata.httpStatusCode > 399) {
-    throw Error(data.$metadata.httpStatusCode)
-  } else {
-    return data.taskArns
-  }
-}
-
 /**
  * Sends a POST to the discord webhookUrl
  * @param {string} webhookUrl Discord webhook url
@@ -109,4 +67,4 @@ function sendDiscordNotification(webhookUrl, data, retryDelayMs = -1) {
   req.end()
 }
 
-export { REPORTING_LEVEL, generateDiscordCloudwatchFields, getThisTaskId, listECSTasks, reportTask, sendDiscordNotification }
+export { REPORTING_LEVEL, generateDiscordCloudwatchFields, reportTask, sendDiscordNotification }