Kubernetes

To manage a Kubernetes cluster with BundleWrap, you first need to set up a kubectl context that works with the cluster. If you're running on Google Kubernetes Engine for example, this can be accomplished with:

gcloud auth login
gcloud container clusters get-credentials your-cluster --zone your-zone --project your-project

You also need to make sure context names are the same on your teammates' machines.

Setting up a node

Each Kubernetes cluster you manage becomes a node. Here is an example nodes.py:

nodes = {
     "my-cluster": {
         'os': 'kubernetes',
         'bundles': ["my-app"],
         'kubectl_context': "my-context",
     },
}

Kubernetes bundles

You can then proceed to write bundles as with regular nodes, but using the k8s_ items:

k8s_namespaces = {
     "my-app": {},
}

k8s_deployments = {
    "my-app/my-deployment": {
        'manifest': {
            "spec": {
                "selector": {
                    "matchLabels": {
                        "app": "nginx",
                    },
                },
                "replicas": 2,
                "template": {
                    "metadata": {
                        "labels": {
                            "app": "nginx",
                        },
                    },
                    "spec": {
                        "containers": [
                            {
                                "name": "nginx",
                                "image": "nginx:latest",
                                "ports": [
                                    {"containerPort": 80},
                                ]
                            },
                        ],
                    },
                },
            },
        },
    },
}

All item names (except namespaces themselves) must be prefixed with the name of a namespace and a forward slash /. Note that BundleWrap will include defaults for the apiVersion, Kind, and metadata/name keys, but you can override them if you must.

Alternatively, you can keep your resource definitions in manifest files:

k8s_namespaces = {
     "my-app": {},
}

k8s_deployments = {
    "my-app/my-deployment": {
        'manifest_file': "my_deployment.yaml",
    },
}

BundleWrap will then look for my_deployment.yaml in bundles/<bundle>/manifests/. You can also use templating in these files.