update: ECS options for different environments

Author: winverse

infrastructure/Pulumi.production.yaml

@@ -1,4 +1,4 @@
 config:
   aws:region: ap-northeast-2
   velog:DOCKER_ENV: production
-  velog:target: server
+  velog:target: cron

infrastructure/Pulumi.stage.yaml

@@ -1,4 +1,4 @@
 config:
   aws:region: ap-northeast-2
   velog:DOCKER_ENV: stage
-  velog:target: server
+  velog:target: server,web

infrastructure/src/common/ecs.ts

@@ -40,6 +40,8 @@ export const createECSfargateService = ({
         subnets: subnetIds,
       },
       taskDefinitionArgs: {
+        cpu: option.taskCpu,
+        memory: option.taskMemory,
         executionRole: {
           roleArn: ecsTaskExecutionRole.arn,
         },

infrastructure/src/lib/ecsOptions.ts

@@ -1,37 +1,91 @@
 import { ENV } from '../env'
 
-const webEcsOption: EcsOption = {
-  desiredCount: ENV.isProduction ? 2 : 1,
-  containerCpu: ENV.isProduction ? 1024 : 512,
-  containerMemory: ENV.isProduction ? 2048 : 1024,
+// fargate cpu memory combination
+// See: https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task-cpu-memory-error.html
+// 0.25 vCPU : 0.5 GB ~ 2 GB
+// 0.5 vCPU : 1 GB ~ 4 GB
+// 1 vCPU : 2 GB ~ 8 GB
+// 2 vCPU : 4 GB ~ 16 GB
+// 4 vCPU : 8 GB ~ 30 GB
+
+const webProdEcsOption: EcsBaseOption = {
+  desiredCount: 2,
+  cpu: 1, // unit 1024
+  memory: 2, // unit 1024
+  maxCapacity: 12,
+  minCapacity: 2,
+}
+
+const webStageEcsOption: EcsBaseOption = {
+  desiredCount: 1,
+  cpu: 0.5, // unit 1024
+  memory: 1, // unit 1024
   maxCapacity: 12,
-  minCapacity: ENV.isProduction ? 2 : 1,
+  minCapacity: 1,
 }
 
-const serverEcsOption: EcsOption = {
-  desiredCount: ENV.isProduction ? 2 : 1,
-  containerCpu: ENV.isProduction ? 1024 : 512,
-  containerMemory: 1024,
+const serverProdEcsOption: EcsBaseOption = {
+  desiredCount: 2,
+  cpu: 0.5, // unit 1024
+  memory: 1, // unit 1024
   maxCapacity: 12,
-  minCapacity: ENV.isProduction ? 2 : 1,
+  minCapacity: 2,
 }
 
-const cronEcsOption: EcsOption = {
-  desiredCount: ENV.isProduction ? 1 : 0,
-  containerCpu: ENV.isProduction ? 1024 : 512,
-  containerMemory: 1024,
+const serverStageEcsOption: EcsBaseOption = {
+  desiredCount: 1,
+  cpu: 0.25, // unit 1024
+  memory: 1, // unit 1024
+  maxCapacity: 12,
+  minCapacity: 1,
+}
+
+const cronProdEcsOption: EcsBaseOption = {
+  desiredCount: 1,
+  cpu: 1, // unit 1024
+  memory: 2, // unit 1024
   maxCapacity: 1,
-  minCapacity: ENV.isProduction ? 1 : 0,
+  minCapacity: 1,
+}
+
+const cronStageEcsOption: EcsBaseOption = {
+  desiredCount: 0,
+  cpu: 0.25, // unit 1024
+  memory: 0.5, // unit 1024
+  maxCapacity: 0,
+  minCapacity: 0,
 }
 
 export const ecsOption = {
-  web: webEcsOption,
-  server: serverEcsOption,
-  cron: cronEcsOption,
+  web: generateEcsOption(ENV.isProduction ? webProdEcsOption : webStageEcsOption),
+  server: generateEcsOption(ENV.isProduction ? serverProdEcsOption : serverStageEcsOption),
+  cron: generateEcsOption(ENV.isProduction ? cronProdEcsOption : cronStageEcsOption),
+}
+
+function generateEcsOption(option: EcsBaseOption): EcsOption {
+  return {
+    desiredCount: option.desiredCount,
+    taskCpu: `${option.cpu} vCPU`,
+    taskMemory: `${option.memory} GB`,
+    containerCpu: 1024 * option.cpu,
+    containerMemory: 1024 * option.memory,
+    maxCapacity: option.maxCapacity,
+    minCapacity: option.minCapacity,
+  }
+}
+
+type EcsBaseOption = {
+  desiredCount: number
+  cpu: number
+  memory: number
+  maxCapacity: number
+  minCapacity: number
 }
 
 type EcsOption = {
   desiredCount: number
+  taskCpu: string
+  taskMemory: string
   containerCpu: number
   containerMemory: number
   maxCapacity: number