Solgate

Yet another data sync pipelines job runner.

A CLI utility that is expected to be automated via container native workflow engines like Argo or Tekton.

Installation

pip install solgate

Configuration

Solgate relies on a configuration file that holds all the information required to fully perform the synchronization. This config file is expected to be of a YAML format and it should contain following keys:

• source key. Value to this key specifies where the data are sourced from.
• destinations key. It's value is expected to be an array for locations. Their purpose is to define sync destinations.
• other top level keys for a general configuration that is not specific to a single location.

General config section

All configuration in this section is optional. Use this section if you'd like to modify the default behavior. Default values are denoted below:

alerts_smtp_server: smtp.corp.redhat.com
alerts_from: solgate-alerts@redhat.com
alerts_to: dev-null@redhat.com
timedelta: 1d

Description:

• alerts_smtp_server, alerts_from, alerts_to are used for email alerting only
• timedelta defines a time window in which the objects in the source bucket must have been modified, to be eligible fo the bucket listing. Only files modified no later than timedelta from now are included.

Source key

source:
  aws_access_key_id: KEY_ID
  aws_secret_access_key: SECRET
  base_path: DH-PLAYPEN/storage/input # at least the bucket name is required, sub path within this bucket is optional
  endpoint_url: https://s3.amazonaws.com # optional, defaults to s3.amazonaws.com
  formatter: "{date}/{collection}.{ext}" # optional, defaults to None

If the formatter is not set, no repartitioning is expected to happen and the S3 object key is left intact, same as it is in the source bucket (within the base_path context). Specifying the formatter in the source section only, doesn't result in repartitioning of all object by itself, only those destinations that also have this option specified are eligible for object key modifications.

Destinations key

destinations:
  - aws_access_key_id: KEY_ID
    aws_secret_access_key: SECRET
    base_path: DH-PLAYPEN/storage/output # at least the bucket name is required, sub path within this bucket is optional
    endpoint_url: https://s3.upshift.redhat.com # optional, defaults to s3.upshift.redhat.com
    formatter: "{date}/{collection}.{ext}" # optional, defaults to None
    unpack: yes # optional, defaults to False/no

The endpoint_url defaults to a different value for destination compared to source section. This is due to the usual data origin and safe destination host.

If the formatter is not set, no repartitioning is expected to happen and the S3 object key is left intact, same as it is in the source bucket (within the base_path context). If repartitioning is desired, the formatter string must be defined in the source section as well - otherwise object name can't be parsed properly from the source S3 object key.

unpack option specifies if the gunzipped archives should be unpacked during the transfer. The .gz suffix is automatically dropped from the resulting object key, no matter if the repartitioning is on or off. Switching this option on results in weaker object validation, since the implicit metadata checksum and size checks can't be used to verify the file integrity.

Separate credentials into different files

In case you don't feel like inlining aws_access_key_id, aws_secret_access_key in plaintext into the config file is a good idea, you can separate these credentials into their distict files. If the credentials keys are not found (inlined) in the config, solgate tries to locate them in the config folder (the same folder as the main config file is located).

The credentials file is expected to contain following:

aws_access_key_id: KEY_ID
aws_secret_access_key: SECRET

For source the expected filename is source.creds.yaml, for destinations destination.X.creds.yaml where X is the index in the destinations list in the main config file. For destinations we allow credentials sharing, therefore if destination.X.creds.yaml is not located, solgate tries to load destination.creds.yaml (not indexed).

Full example

Let's have this file structure in our /etc/solgate:

$ tree /etc/solgate
/etc/solgate
├── config.yaml
├── destination.0.creds.yaml
├── destination.creds.yaml
└── source.creds.yaml

And a main config file /etc/solgate/config.yaml looking like this:

source:
  base_path: DH-PLAYPEN/storage/input

destinations:
  - base_path: DH-PLAYPEN/storage/output0 # idx=0

  - base_path: DH-PLAYPEN/storage/output1 # idx=1

  - base_path: DH-PLAYPEN/storage/output2 # idx=2
    aws_access_key_id: KEY_ID
    aws_secret_access_key: SECRET

Solgate will use these credentials:

• For source the source.creds.yaml is read, because no credentials are inlined
• For destination idx=0 the destination.0.creds.yaml is used, because no credentials are inlined
• For destination idx=1 the destination.creds.yaml is used, because no credentials are inlined and there's no destination.1.creds.yaml file
• For destination idx=2 the inlined credentials are used

The resolution priority:

type	priority
source	inlined > source.creds.yaml
destination	inlined > destination.INDEX.creds.yaml > destination.creds.yaml

Example config file

Here's a full configuration file example, all together.

alerts_smtp_server: smtp.corp.redhat.com
alerts_from: solgate-alerts@redhat.com
alerts_to: dev-null@redhat.com
timedelta: 1d

source:
  aws_access_key_id: KEY_ID
  aws_secret_access_key: SECRET
  endpoint_url: https://s3.upshift.redhat.com
  formatter: "{date}/{collection}.{ext}"
  base_path: DH-PLAYPEN/storage/input

destinations:
  - aws_access_key_id: KEY_ID
    aws_secret_access_key: SECRET
    endpoint_url: https://s3.upshift.redhat.com
    formatter: "{collection}/historic/{date}-{collection}.{ext}"
    base_path: DH-PLAYPEN/storage/output

  - aws_access_key_id: KEY_ID
    aws_secret_access_key: SECRET
    endpoint_url: https://s3.upshift.redhat.com
    formatter: "{collection}/latest/full_data.csv"
    base_path: DH-PLAYPEN/storage/output
    unpack: yes

Usage

Solgate is mainly intended for use in automation within Argo Workflows. However it can be also used as a standalone CLI tool for manual transfers and (via extensions) for (TBD) manifest scaffold generation and (TBD) deployed instance monitoring.

List bucket for files ready to be transferred

Before the actual sync can be run, it is required

solgate list

CLI option	Config file entry	Description
-o		Output to a file instead of stdout. Creates a listing file.
	timedelta	Define a lookup restriction. Only files newer than this value are reported. Defaults to 1 day.

Sync objects

solgate send KEY

CLI option	Description
-l, --listing-file	A listing file ingested by this command. Format is expected to be the same as solgate list output. If set, the KEY argument is ignored.

Notification service

Send an workflow status alert via email from Argo environment.

Command expects to be passed values matching available Argo variable format as described here.

solgate report

Options can be set either via CLI argument or via environment variable:

• Options which map to Argo Workflow variables:

  CLI option	Environment variable name	Value should map to Argo workflow variable	Description
  --failures	WORKFLOW_FAILURES	{{workflow.failures}}	JSON serialized into a string listing all the failed workflow nodes
  -n, --name	WORKFLOW_NAME	{{workflow.name}}	Workflow instance name.
  --namespace	WORKFLOW_NAMESPACE	{{workflow.namespace}}	Project namespace where the workflow was executed.
  -s, --status	WORKFLOW_STATUS	{{workflow.status}}	Current status of the workflow execution.
  -t, --timestamp	WORKFLOW_TIMESTAMP	{{workflow.creationTimestamp}}	Workflow execution timestamp.

• Options which map to config file entries. Priority order:

  CLI option > Environment variable > Config file entry > Default value
  

  CLI option	Environment variable name	Config file entry	Description
  --from	ALERT_SENDER	alerts_from	Email alert sender address. Defaults to solgate-alerts@redhat.com.
  --to	ALERT_RECIPIENT	alerts_to	Email alert recipient address. Defaults to data-hub-alerts@redhat.com.
  --smtp	SMTP_SERVER	alerts_smtp_server	SMTP server URL. Defaults to smtp.corp.redhat.com.

• Other:

  CLI option	Environment variable name	Description
  --host	ARGO_UI_HOST	Argo UI external facing hostname.

Workflow manifests

Additionally to the solgate package this repository also features deployment manifests in the manifests folder. The current implementation of Kubernetes manifests relies on Argo, Argo Events and are structured in a Kustomize format. Environments for deployment are specified in the manifests/overlays/ENV_NAME folder.

Each environment features multiple solgate workflow instances. Configuration config.ini file and selected triggers are defined in instance subfolder within the particular environment folder.

Deploy

Environment deployments are expected to be handled via Argo CD in AI-CoE SRE, however it can be done manually as well.

Local prerequisites:

• Kustomize
• sops
• ksops

Already deployed platform and running services:

• Argo
• Argo Events

Build and deploy manifests

kustomize build --enable_alpha_plugins manifests/overlays/ENV_NAME | oc apply -f -

Create a new instance

Will be handled via scaffold in next version!

Prerequisites:

Import GPG keys EFDB9AFBD18936D9AB6B2EECBD2C73FF891FBC7E, A76372D361282028A99F9A47590B857E0288997C, 04DAFCD9470A962A2F272984E5EB0DA32F3372AC

gpg --keyserver keyserver.ubuntu.com --recv EFDB9AFBD18936D9AB6B2EECBD2C73FF891FBC7E A76372D361282028A99F9A47590B857E0288997C 04DAFCD9470A962A2F272984E5EB0DA32F3372AC

1. Create new folder named after the instance in the selected environment overlay (make a copy of prod/TEMPLATE).

2. Create a kustomization.yaml file in this new folder with following content, change the NAME to your instance name:

   apiVersion: kustomize.config.k8s.io/v1beta1
   kind: Kustomization
   
   generators:
     - ./secret-generator.yaml
   
   commonLabels:
     app.kubernetes.io/name: NAME
   
   resources:
     - ./cronwf.yaml
   

3. Create a secret-generator.yaml file in this new folder with following content:

   apiVersion: viaduct.ai/v1
   kind: ksops
   metadata:
     name: secret-generator
   files:
     - secret.enc.yaml
   

4. Create a secret.enc.yaml file in this folder and encrypt it via sops:

   apiVersion: v1
   kind: Secret
   metadata:
     name: solgate-NAME
   stringData:
     source.creds.yaml: |
       aws_access_key_id: KEY_ID_FOR_SOURCE
       aws_secret_access_key: SECRET_FOR_SOURCE
   
     destination.creds.yaml: |
       aws_access_key_id: DEFAULT_KEY_ID_FOR_DESTINATIONS
       aws_secret_access_key: DEFAULT_SECRET_FOR_DESTINATIONS
   
     destination.2.creds.yaml: |
       aws_access_key_id: KEY_ID_FOR_DESTINATION_ON_INDEX_2
       aws_secret_access_key: SECRET_FOR_DESTINATION_ON_INDEX_2
   
     config.yaml: |
       alerts_smtp_server: smtp.corp.redhat.com
       alerts_from: solgate-alerts@redhat.com
       alerts_to: dev-null@redhat.com
       timedelta: 5h
   
       source:
         endpoint_url: https://s3.upshift.redhat.com
         formatter: "{date}/{collection}.{ext}"
         base_path: DH-PLAYPEN/storage/input
   
       destinations:
         - endpoint_url: https://s3.upshift.redhat.com
           formatter: "{collection}/historic/{date}-{collection}.{ext}"
           base_path: DH-PLAYPEN/storage/output
           unpack: yes
   
         - endpoint_url: https://s3.upshift.redhat.com
           formatter: "{collection}/latest/full_data.csv"
           base_path: DH-PLAYPEN/storage/output
           unpack: yes
   
         - endpoint_url: https://s3.upshift.redhat.com
           base_path: DH-PLAYPEN/storage/output
   

   sops -e -i overlays/ENV_NAME/NEW_INSTANCE_NAME/INSTANCE_NAME.env.yaml
   

   Please make sure the *.creds.yaml entries in the secret are encrypted.

5. Create cronwf.yaml with following content, please change the name and config variable value to match the secret above:

   apiVersion: argoproj.io/v1alpha1
   kind: CronWorkflow
   metadata:
     generateName: solgate-NAME
     name: solgate-NAME
   spec:
     schedule:
     concurrencyPolicy: "Replace"
     workflowSpec:
       arguments:
         parameters:
           - name: config
             value: solgate-NAME
       workflowTemplateRef:
         name: solgate
   

6. Update the resource and patch listing in the overlays/ENV_NAME/kustomization.yaml:

   resources:
     - ...
     - ./NEW_INSTANCE_NAME
   

Backfill

A backfill job ensures processing of all objects in the source bucket. This job assumes none of the objects were processed before and syncs it all potentially overwriting any changes in the destination bucket.

There's a backfill.yaml available to be submitted directly. Please specify the config parameter before submitting. Value must match a name of a Secret config resource for targeted pipeline.

argo submit -p config=solgate-NAME manifests/backfill.yaml

Workflow parameters

CronWorkflow resource defined for each pipeline instance allows you to define 3 parameters:

Parameter	Value	Required	Description
config	string	yes	Define which config secret to mount to pods and pass to the solgate runtime
is-backfil	string (boolean in quotes)	no	If set to true sync all data in the source bucket. Defaults to false
split	string (int in quotes)	no	Define amount of files that is handled by a single sync pod. If there's more files to sync, the pipeline will spin up additional pods. Defaults to 5000

Developer setup

Local setup

Install pipenv and set up the environment:

pipenv sync -d

Install/enable pre-commit for this project:

pip install -g pre-commit
pre-commit install

Running tests

With local environment set up, you can run tests locally like this:

pipenv run pytest . --cov solgate

Building manifests

Install local prerequisites for kustomize manifests:

• Kustomize
• sops
• ksops

Use kustomize build --enable_aplha_plugins ... to build manifests.

CI/CD

We rely on AICoE-CI GitHub application and bots to provide CI for us. All is configured via .aicoe-ci.yaml.

Releasing

If you're a maintainer, please release via GitHub issues. New release creates:

• Creates a git release tag on GitHub.
• Pushes new image to Quay.io thoth-station/solgate, tagged by the released version and latest.
• Releases to PyPI solgate project.