Cache

Description

This plugin enables you to cache build resources in an s3 compatible store for a Vela pipeline.

Source Code: https://github.com/go-vela/vela-s3-cache

Registry: https://hub.docker.com/r/target/vela-s3-cache

Usage

NOTE:

Users should refrain from using latest as the tag for the Docker image.

It is recommended to use a semantically versioned tag instead.

Sample of restoring a cache:

steps:
  - name: restore_cache
    image: target/vela-s3-cache:latest
    pull: always
    parameters:
      action: restore
      bucket: mybucket
      server: mybucket.s3-us-west-2.amazonaws.com

Sample of rebuilding a cache:

steps:
  - name: rebuild_cache
    image: target/vela-s3-cache:latest
    pull: always
    parameters:
      action: rebuild
      bucket: mybucket
      server: mybucket.s3-us-west-2.amazonaws.com
      mount:
        - .gradle

Sample of rebuilding a cache while preserving the directory structure:

steps:
  - name: rebuild_cache
    image: target/vela-s3-cache:latest
    pull: always
    parameters:
      action: rebuild
      bucket: mybucket
      server: mybucket.s3-us-west-2.amazonaws.com
      preserve_path: true
      mount:
        - foo/test1
        - bar/test2

Sample of flushing a cache:

steps:
  - name: flushing_cache
    image: target/vela-s3-cache:latest
    pull: always
    parameters:
      action: flush
      bucket: mybucket
      server: mybucket.s3-us-west-2.amazonaws.com

Secrets

NOTE: Users should refrain from configuring sensitive information in your pipeline in plain text.

Internal

Users can use Vela internal secrets to substitute these sensitive values at runtime:

steps:
  - name: restore_cache
    image: target/vela-s3-cache:latest
    pull: always
+   secrets: [ s3_cache_access_key, s3_cache_secret_key ]
    parameters:
      action: restore
      bucket: mybucket
      server: mybucket.s3-us-west-2.amazonaws.com
-     access_key: AKIAIOSFODNN7EXAMPLE
-     secret_key: 123456789QWERTYEXAMPLE

This example will add the secrets to the restore_cache step as environment variables:

S3_CACHE_ACCESS_KEY=<value>

S3_CACHE_SECRET_KEY=<value>

External

The plugin accepts the following files for authentication:

Parameter	Volume Configuration
`access_key`	`/vela/parameters/s3-cache/access_key`, `/vela/secrets/s3-cache/access_key`
`secret_key`	`/vela/parameters/s3-cache/secret_key`, `/vela/secrets/s3-cache/secret_key`
`session_token`	`/vela/parameters/s3-cache/session_token`, `/vela/secrets/s3-cache/session_token`

Users can use Vela external secrets to substitute these sensitive values at runtime:

steps:
  - name: restore_cache
    image: target/vela-s3-cache:latest
    pull: always
+   secrets: [ s3_cache_access_key, s3_cache_secret_key ]
    parameters:
      action: restore
      bucket: mybucket
      server: mybucket.s3-us-west-2.amazonaws.com
-     access_key: AKIAIOSFODNN7EXAMPLE
-     secret_key: 123456789QWERTYEXAMPLE

This example will read the secret values in the volume stored at /vela/secrets/

Parameters

NOTE:

The plugin supports reading all parameters via environment variables or files.

Any values set from a file take precedence over values set from the environment.

The s3 bucket set with the bucket parameter is expected to be created beforehand.

The following parameters can used to configure all image actions:

Name	Description	Required	Default	Environment Variables
`accelerated_endpoint`	s3 accelerated instance to communicate with	`false`	`N/A`	`PARAMETER_ACCELERATED_ENDPOINT` `S3_CACHE_ACCELERATED_ENDPOINT`
`access_key`	access key for communication with s3	`true`	`N/A`	`PARAMETER_ACCESS_KEY` `S3_CACHE_ACCESS_KEY` `AWS_ACCESS_KEY_ID`
`action`	action to perform against s3	`true`	`N/A`	`PARAMETER_ACTION` `S3_CACHE_ACTION`
`build_branch`	branch name from build for the repository	`false`	set by Vela	`PARAMETER_BUILD_BRANCH` `VELA_BUILD_BRANCH`
`bucket`	name of the s3 bucket	`true`	`N/A`	`PARAMETER_BUCKET` `S3_CACHE_BUCKET`
`log_level`	set the log level for the plugin	`false`	`info`	`PARAMETER_LOG_LEVEL` `S3_CACHE_LOG_LEVEL`
`org`	name of the org for the repository	`true`	set by Vela	`PARAMETER_ORG` `VELA_REPO_ORG`
`path`	custom path for the object(s)	`false`	`N/A`	`PARAMETER_PATH` `S3_CACHE_PATH`
`prefix`	path prefix for the object(s)	`false`	`N/A`	`PARAMETER_PREFIX` `S3_CACHE_PREFIX`
`repo`	name of the repository	`true`	set by Vela	`PARAMETER_REPO` `VELA_REPO_NAME`
`repo_branch`	default branch for the Vela repository	`false`	set by Vela	`PARAMETER_REPO_BRANCH` `VELA_REPO_BRANCH`
`secret_key`	secret key for communication with s3	`true`	`N/A`	`PARAMETER_SECRET_KEY` `S3_CACHE_SECRET_KEY` `AWS_SECRET_ACCESS_KEY`
`server`	s3 instance to communicate with	`true`	`N/A`	`PARAMETER_SERVER` `S3_CACHE_SERVER`
`session_token`	session token for communication with s3	`true`	`N/A`	`PARAMETER_SESSION_TOKEN` `S3_CACHE_SESSION_TOKEN` `AWS_SESSION_TOKEN`

Restore

The following parameters are used to configure the restore action:

Name	Description	Required	Default	Environment Variables
`filename`	the name of the cache object	`true`	`archive.tgz`	`PARAMETER_FILENAME` `S3_CACHE_FILENAME`
`timeout`	the timeout for the call to s3	`false`	`10m`	`PARAMETER_TIMEOUT` `S3_CACHE_TIMEOUT`

Rebuild

The following parameters are used to configure the rebuild action:

Name	Description	Required	Default	Environment Variables
`filename`	the name of the cache object	`true`	`archive.tgz`	`PARAMETER_FILENAME` `S3_CACHE_FILENAME`
`timeout`	the timeout for the call to s3	`false`	`10m`	`PARAMETER_TIMEOUT` `S3_CACHE_TIMEOUT`
`compression_level`	the compression level for the cache object	`false`	`-1`	`PARAMETER_COMPRESSION_LEVEL` `S3_COMPRESSION_LEVEL`
`preserve_path`	whether to preserve the relative directory structure during the tar process	`false`	`false`	`PARAMETER_PRESERVE_PATH` `S3_PRESERVE_PATH`
`mount`	the file or directories locations to build your cache from	`true`	`N/A`	`PARAMETER_MOUNT` `S3_CACHE_MOUNT`

Flush

The following parameters are used to configure the flush action:

Name	Description	Required	Default	Environment Variables
`age`	delete the objects past a specific age (i.e. 60m, 8h)	`false`	`336h`	`PARAMETER_AGE` `S3_CACHE_AGE`

Template

COMING SOON!

Troubleshooting

You can start troubleshooting this plugin by tuning the level of logs being displayed:

steps:
  - name: restore_cache
    image: target/vela-s3-cache:latest
    pull: always
    parameters:
      action: restore
      bucket: mybucket
+     log_level: trace
      server: mybucket.s3-us-west-2.amazonaws.com

Below are a list of common problems and how to solve them:

Invalid duration value

The error may look like this:

could not parse "14d" as duration value for flag flush.age: time: unknown unit "d" in duration "14d"

Values for rebuild and restore timeout and flushing age are parsed using Go's time.ParseDuration function. Only h for hours, m for minutes, and so on for smaller time units are supported; d for days will cause an error unless added in subsequent versions of Go after v1.16, which is unlikely.

Description​

Usage​

Secrets​

Internal​

External​

Parameters​

Restore​

Rebuild​

Flush​

Template​

Troubleshooting​

Invalid duration value​