Awesome-sidecar

This list contains projects that can run as a sidecar in k8s, learn more about sidecars
Please open a PR to add new project to the list.

Service Mesh / Load Balancer

https://github.com/istio/proxy - part of Istio, uses envoy as a proxy sidecar
https://github.com/linkerd/linkerd2-proxy - part of Linkerd, full proxy & load balancer implemented in Ruts
https://github.com/minio/sidekick - High Performance HTTP Sidecar Load Balancer
https://github.com/envoyproxy/envoy - High Performance edge/middle/service proxy CNCF graduated project

Secrets

https://github.com/Talend/vault-sidecar-injector - part of HashiCorp Vault, for fetching secrets from Vault

Logs

https://github.com/h3poteto/fluentd-sidecar-injector - ship log files using Fluentd
https://github.com/infolinks/loggly-sidecar - ship logs files using Loggly

Authentication and Authorisation

https://github.com/yahoojapan/athenz-client-sidecar - retrieve authentication and authorization credential from Athenz server
https://github.com/louketo/louketo-proxy (formelly Keycloak gateway) - A OpenID/Proxy service

RBAC

https://github.com/brancz/kube-rbac-proxy - Perform RBAC authorization against the Kubernetes API using HTTP proxy

Leader Election

https://github.com/vapor-ware/k8s-elector - adds a leader election capability to a deployment

Dynamic Configuration

https://github.com/kiwigrid/k8s-sidecar - watch a config map and sends an HTTP request after a change
https://github.com/jimmidyson/configmap-reload - watch a config map and sends an HTTP request after a change

Storage

https://github.com/signaleleven/s3fs-sidecar - mount an s3 bucket to a shared volume
https://github.com/GoogleCloudPlatform/gcsfuse - mount an Google Cloud Storage bucket to a shared volume
https://github.com/kubernetes/git-sync - clones a git repo into a shared volume, keeps it in sync, and sends an HTTP request after a change

Database

https://github.com/cvallance/mongo-k8s-sidecar - Adds new replicas to the mongo container automatically https://github.com/GoogleCloudPlatform/cloudsql-proxy#deploying-cloud-sql-proxy-as-a-sidecar-container - allows a user to connect to a Cloud SQL database without having to deal with IP whitelisting or SSL certificates manually.