S3 Deployment

This page documents deployments using the dpl v2. Please see our blog post for details. You can check previous dpl v1 documentation here.

Travis CI can automatically upload your build to Amazon S3 after a successful build.

For a minimal configuration, add the following to your .travis.yml:

deploy:
  provider: s3
  access_key_id: <encrypted access_key_id>
  secret_access_key: <encrypted secret_access_key>
  bucket: <bucket>
  edge: true # opt in to dpl v2

You can find your AWS Access Keys in your Amazon Console.

Note that deploying to S3 only adds files to your bucket, it does not remove them. If you need to remove outdated files you can do that manually in your Amazon S3 console.

Status #

Support for deployments to AWS S3 is stable.

Known options #

Use the following options to further configure the deployment.

Shared options #

Environment variables #

All options can be given as environment variables if prefixed with AWS_ or S3_.

For example, access_key_id can be given as

• AWS_ACCESS_KEY_ID=<access_key_id> or
• S3_ACCESS_KEY_ID=<access_key_id>

Securing secrets #

Secret option values should be given as either encrypted strings in your build configuration (.travis.yml file) or environment variables in your repository settings.

Environment variables can be set on the settings page of your repository, or using travis env set:

travis env set AWS_ACCESS_KEY_ID <access_key_id>

In order to encrypt option values when adding them to your .travis.yml file use travis encrypt:

travis encrypt <access_key_id>

Or use --add to directly add it to your .travis.yml file. Note that this command has to be run in your repository’s root directory:

travis encrypt --add deploy.access_key_id <access_key_id>

Set an ACL #

You can set the acl of your uploaded files via the acl option like this:

deploy:
  provider: s3
  acl: public_read
  # ⋮

See Known options for valid ACL values.

In order to set acl, the bucket’s policy must allow such operations via the s3:PutObjectAcl action. An example policy might look like the following. Be sure to set up the principal and resources according to your needs.

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "AllowPublicRead",
      "Effect": "Allow",
      "Principal": {
        "AWS": "PRINCIPAL_ID"
      },
      "Action": [
        "s3:AbortMultipartUpload",
        "s3:DeleteObject",
        "s3:GetObject",
        "s3:GetObjectAcl",
        "s3:PutObject",
        "s3:PutObjectAcl"
      ],
      "Resource": "arn:aws:s3:::BUCKET_NAME/*"
    }
  ]
}

Another way to set ACL for your artifacts is via a S3 bucket policy. For example, the following policy grants the public read permission:

{
  "Version": "2014-09-25",
  "Statement":[{
    "Sid":"AllowPublicRead",
        "Effect":"Allow",
      "Principal": "*",
      "Action":["s3:GetObject"],
      "Resource":["arn:aws:s3:::"YOUR BUCKET NAME"/*"
      ]
    }
  ]
}

S3 bucket regions #

By default the region us-east-1 is used when deploying to S3. If your bucket is hosted in a different region, deploying using the default region results in the following error.

The bucket you are attempting to access must be addressed using the specified endpoint.
Please send all future requests to this endpoint. (AWS::S3::Errors::PermanentRedirect)

This can be resolved by specifying your bucket’s region using the region configuration. For example, this example uses the eu-west-1 region.

deploy:
  provider: s3
  # ⋮
  region: eu-west-1

Deploy From Only One Folder #

Often, you don’t want to upload your entire project to S3. You can use the local_dir option to only upload a single directory to S3. For example:

deploy:
  provider: s3
  # ⋮
  local_dir: ./build

Deploy to a Specific S3 Folder #

Often, you want to upload only to a specific S3 Folder. You can use the upload-dir option to set the S3 destination folder. For example:

deploy:
  provider: s3
  # ⋮
  upload-dir: travis-builds

Deploy to Multiple Buckets #

If you want to upload to multiple buckets, use multiple deployment configurations:

deploy:
  - provider: s3
    access_key_id: <access_key_id>
    secret_access_key: <secret_access_key>
    bucket: "One S3 Bucket"
  - provider: s3
    access_key_id: <access_key_id>
    secret_access_key: <secret_access_key>
    bucket: "Another S3 Bucket"

Conditional releases #

You can deploy only when certain conditions are met. See Conditional Releases with on:.

Set the content encoding #

S3 uploads can optionally set the HTTP header Content-Encoding. This header allows files to be sent compressed while retaining file extensions and the associated MIME types.

To enable this feature, add:

deploy:
  provider: s3
  # ⋮
  detect_encoding: true

If the file is compressed with gzip or compress, it will be uploaded with the appropriate header.

Set the charset on the content type #

S3 can take a content-type header. Normally this doesn’t include a character set as well. If you would like to add a character set, add the default_text_charset option with what you want it to be. For example:

deploy:
  provider: s3
  # ⋮
  default_text_charset: utf-8

HTTP cache control #

S3 uploads can optionally set Cache-Control and Expires HTTP headers.

Set HTTP header Cache-Control to suggest that the browser cache the file. Defaults to no-cache. Valid options are no-cache, no-store, max-age=<seconds>, s-maxage=<seconds> no-transform, public, private.

Expires sets the date and time that the cached object is no longer cacheable. Defaults to not set. The date must be in the format YYYY-MM-DD HH:MM:SS -ZONE.

deploy:
  provider: s3
  # ⋮
  cache_control: max-age=31536000
  expires: "2012-12-21 00:00:00 -0000"

Fine-grained HTTP cache control #

Optionally cache controls can be set more fine-grained on a per file extension basis.

The following example allows image files, such a .png, .jpg, or .webp, to be cached, while .html are not cached at all.

deploy:
  provider: s3
  # ⋮
  cache_control: "max-age=31536000: *.jpg, *.gif, *.png, *.webp, *.css, *.js, *.ico"
  expires: "Wed, 21 Oct 2015 07:28:00 GMT: *.{jpg,gif,png,webp,css,js,ico}"

Or a more sophisticated example:

deploy:
  provider: s3
  # ⋮
  cache_control: "public, max-age=31536000: *.jpg, *.gif, *.png, *.webp, *.css, *.js, *.ico"
  expires: "$(date -u +'%Y-%m-%d %H:%M:%S -0000' --date 'next Year'): *.{jpg,gif,png,webp,css,js,ico}" # for Linux

Please note that the example given works on Linux. On macOS, which uses the BSD version of date this would be an equivalent solution:

date -j -f "%s" $(( $(date -u +"%s") + 365*24*60*60 )) +"%Y-%m-%d %H:%M:%S -0000"

Upload files starting with a dot #

S3 uploads can be set to upload all files starting with a .

deploy:
  provider: s3
  # ⋮
  dot_match: true

Use S3-compatible Object Storage #

You can use S3-compatible object storage such as Digital Ocean Spaces by setting the endpoint key.

deploy:
  provider: s3
  # ⋮
  endpoint: https://nyc3.digitaloceanspaces.com

Pull Requests #

Note that pull request builds skip the deployment step altogether.

See also #

• Making deployments conditional
• Running commands before and after the deploy step
• Deploying to multiple targets
• Running an edge version