GitLab => CodeCommit push mirroring

Create IAM user and generate Git credential

Create access access-user-policy.json 

{

    "Version": "2012-10-17",

    "Statement": [

        {

            "Effect": "Allow",

            "Action": [

                "codecommit:GitPull",

                "codecommit:GitPush"

            ],

            "Resource": [

                "arn:aws:codecommit:ap-northeast-1:{ACCOUNT ID}:{REPOSITORY NAME}"

            ]

        }

    ]

}

At AWS CLI, run those commands

POLICY={POLICY NAME}

USER={USER NAME}

ACCOUNT={ACCOUNT ID}

aws iam create-policy \

    --policy-name $POLICY \

    --policy-document file://access-user-policy.json

aws iam create-user --user-name $USER

aws iam attach-user-policy \

    --user-name $USER \

    --policy-arn arn:aws:iam::$ACCOUNT:policy/$POLICY

aws iam create-service-specific-credential \

    --user-name $USER \

    --service-name codecommit.amazonaws.com

Memorize Git credential

Memorize the outputs from previous executions

{

    "ServiceSpecificCredential": {

        "CreateDate": "2023-01-11T07:08:45+00:00",

        "ServiceName": "codecommit.amazonaws.com",

        "ServiceUserName": "{USER NAME}-at-{ACCOUNT ID}",

        "ServicePassword": "xxxxxxxxxxxx",

        "ServiceSpecificCredentialId": "XXXXXXXXXXXXX",

        "UserName": "{USER NAME}",

        "Status": "Active"

    }

}

Create CodeCommit repository

• At AWS CLI, run those commands

aws codecommit create-repository --repository-name {CODECOMMIT REPOSITORY NAME}

• At CodeCommit repository, go to Clone URL > Clone HTTPS
• Memorize the URL for later use

https://git-codecommit.ap-northeast-1.amazonaws.com/v1/repos/{REPOSITORY NAME}

Set up GitLab push mirroring

• At your GitLab project, go to Settings > Repository
• Expand Mirroring repositories
• Modify the URL with ServiceUserName from previous sections and put it on Git repository URL

https://{ServiceUserName}@git-codecommit.ap-northeast-1.amazonaws.com/v1/repos/{REPOSITORY NAME}

• Mirror direction: Push
• Authentication method: Password
• Password: ServicePassword from the previous section
• Mirror repository
• After successful mirroring, run Update now

Check CodeCommit repository

• Wait a while, and you will see the CodeCommit repository has the mirrored code from the GitLab