Juju is an open source orchestration engine that simplifies deployment, integration, and lifecycle management of applications across any infrastructure at scale using reusable operators called charms.
Orchestration engine that enables the deployment, integration and lifecycle management of applications at any scale, on any infrastructure (Kubernetes or otherwise).
Juju is primarily used by DevOps engineers and cloud architects to automate and manage complex application deployments on Kubernetes or other infrastructures. It enables seamless integration and lifecycle management of applications through a simple, declarative interface, reducing operational overhead and accelerating cloud security automation.
Juju requires a cloud environment or local VM (e.g., Multipass) to operate. Users should have familiarity with Kubernetes or cloud infrastructure concepts. Leveraging charms simplifies complex deployments but requires understanding charm lifecycle and relations. For secure deployments, integrating TLS certificates is recommended. Always monitor application status to ensure successful deployment and integration.
Install Multipass: sudo snap install multipass
Launch an Ubuntu VM with the charm-dev blueprint: multipass launch --cpus 4 --memory 8G --disk 50G --name tutorial-vm charm-dev
Open a shell into the VM: multipass shell tutorial-vm
Verify Juju and clouds: juju clouds
Bootstrap Juju controller on MicroK8s: juju bootstrap microk8s tutorial-controller
Add a Juju model: juju add-model tutorial-modeljuju deploy mattermost-k8s
Deploys the Mattermost application on Kubernetes using Juju charms.
juju deploy postgresql-k8s --channel 14/stable --trust
Deploys PostgreSQL on Kubernetes with a stable channel and trusted permissions.
juju deploy tls-certificates-operator
Deploys the TLS certificates operator to manage security certificates.
juju config tls-certificates-operator generate-self-signed-certificates="true" ca-common-name="Test CA"
Configures the TLS operator to generate self-signed certificates with a specified CA common name.
juju integrate postgresql-k8s tls-certificates-operator
Integrates PostgreSQL deployment with the TLS certificates operator to enable encrypted traffic.
juju integrate mattermost-k8s postgresql-k8s:db
Connects Mattermost with PostgreSQL database through Juju relations.
watch -n 1 -c juju status --color
Continuously monitors the status of deployed applications with color-coded output.
curl <IP address>:<port>/api/v4/system/ping
Tests the deployed Mattermost service to verify it is running and responsive.
multipass delete --purge tutorial-vm
Deletes and purges the Multipass VM used for the Juju environment.
snap remove multipass
Uninstalls Multipass from the system.