소개

전체 시스템 이미지

전제

  post_build:
    commands:
      ...
      ## db migrationしたい場合は以下3行のコメントアウトを外す
      - aws ecs run-task --launch-type EC2 --cluster cluster-hoge-${ENV} --task-definition ${ENV}-db-migration-ecs  > run-task.log
      - TASK_ARN=$(jq -r '.tasks[0].taskArn' run-task.log)
      - aws ecs wait tasks-stopped --cluster arn:aws:ecs:ap-northeast-1:${ACCOUNT_ID}:cluster/cluster-${ENV} --tasks $TASK_ARN
      ...

4. 결과를 슬랙 알림으로 확인

어떻게 구현했는지

[
  {
    "name": "db-migration",
    "image": "xxxxxxxxxxxxx.dkr.ecr.ap-northeast-1.amazonaws.com/prod-app:latest",
    "essential": true,
    "secrets": [
      {
        "name": "MIGRATION_DB",
        "valueFrom": "/prod/migration"
      }
    ],
    "environment": [
      {
        "name": "ENV",
        "value": "prod"
      }
    ],
    "logConfiguration": {
      "logDriver": "awslogs",
      "options": {
        "awslogs-region": "ap-northeast-1",
        "awslogs-stream-prefix": "prod",
        "awslogs-group": "/ecs/migration/"
      }
    },
    "entrypoint": ["./entry_point.sh"]
  }
]

# アプリケーション用のイメージ
ARG GO_VERSION=1.12.4

FROM golang:${GO_VERSION}-alpine AS builder

RUN apk add --no-cache git

##### source build
WORKDIR /root/go/src/xxxxxxxxx/hoge/hoge/


# こうするとmodファイルに変更があった時しかdownload走らない
ENV GO111MODULE=on
ENV GOPROXY=https://proxy.golang.org
ENV GOPRIVATE=*.gitlab.hoge.co.jp

COPY go.mod .
COPY go.sum .
# Because of how the layer caching system works in Docker, the  go mod download
# command will _ only_ be re-run when the go.mod or go.sum file change
RUN go mod download

FROM builder AS app_builder
COPY . .
RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go install  ./server_src/app/ad_server


###### multi stage build
FROM alpine

RUN apk --update add tzdata && \
    cp /usr/share/zoneinfo/Asia/Tokyo /etc/localtime && \
    apk del tzdata && \
    rm -rf /var/cache/apk/*

# dbmigrateツールdownload
ENV MIGRATE_VERSION="v4.6.1"
RUN apk --update add curl expect && \
    curl -L https://github.com/golang-migrate/migrate/releases/download/$MIGRATE_VERSION/migrate.linux-amd64.tar.gz | tar xvz && \
    rm -rf /var/cache/apk/*

ARG ENV=stage
ARG MIGRATION=/resources/db/migrations/
ARG SLACK_SH=/script/migration_report_to_slack/migration_result_to_slack.sh

COPY --from=app_builder /go/bin/ad_server ad_server
COPY --from=app_builder ${MIGRATION} migrations/
COPY --from=app_builder ${SLACK_SH} migration_result_to_slack.sh
RUN chmod 755 migration_result_to_slack.sh

# dbmigrate用のentry_point.shを作成
RUN echo $'#!/bin/sh \n\
#migrate downしたかったら以下のexpect部分をコメントアウトすべし\n\
#expect -c "\n\
#spawn ./migrate.linux-amd64 -database $MIGRATION_DB -path ./migrations down\n\
#expect \\"Are you sure you want to apply all down migrations? \[y/N\]\\"\n\
#send -- \\"y\\n\\"\n\
#expect \\"Applying all down migrations\\"\n\
#expect {\n\
#    -regexp \"\\n.*\\r\" {\n\
#        send \"exit\\n\"\n\
#    }\n\
#}\n\
#"\n\
\n\
#migrate upと結果およびversionをslackに通知\n\
./migrate.linux-amd64 -database $MIGRATION_DB -path ./migrations up 2>> migration_result.log \n\
chmod 644 migration_result.log \n\
export MIGRATION_RESULT=$(cat migration_result.log) \n\
./migrate.linux-amd64 -database $MIGRATION_DB -path ./migrations version 2> migration_version.log \n\
chmod 644 migration_version.log \n\
export MIGRATION_VERSION=$(cat migration_version.log) \n\
./migration_result_to_slack.sh' >> entry_point.sh
RUN chmod 755 entry_point.sh

# 後でecs-taskの定義で上書きされる
ENTRYPOINT ["./ad_server"]

참고문헌