This charm can grant select permissions to instances of applications related to it which enable integration with OpenStack specific features, such as firewalls, load balancing, block storage, object storage, etc.
This charm acts as a proxy to OpenStack and provides an interface to provide a set of credentials for a somewhat limited project user to the applications that are related to this charm.
When on OpenStack, this charm can be deployed, granted trust via Juju to access OpenStack, and then related to an application that supports the interface.
For example, CDK has support for this, and can be deployed with the following bundle overlay:
applications: openstack-integrator: charm: cs:~containers/openstack-integrator num_units: 1 relations: - ['openstack-integrator', 'kubernetes-master'] - ['openstack-integrator', 'kubernetes-worker']
Using Juju 2.4-beta1 or later:
juju deploy cs:canonical-kubernetes --overlay ./k8s-openstack-overlay.yaml juju trust openstack-integrator
To deploy with earlier versions of Juju, you will need to provide the cloud
credentials via the
credentials, charm config options.
Resource Usage Note
By relating to this charm, other charms can directly allocate resources, such as PersistentDisk volumes and Load Balancers, which could lead to cloud charges and count against quotas. Because these resources are not managed by Juju, they will not be automatically deleted when the models or applications are destroyed, nor will they show up in Juju's status or GUI. It is therefore up to the operator to manually delete these resources when they are no longer needed, using the OpenStack console or API.
Following are some examples using OpenStack integration with CDK.
Creating a pod with a PersistentDisk-backed volume
This script creates a busybox pod with a persistent volume claim backed by OpenStack's PersistentDisk.
#!/bin/bash # create a storage class using the `kubernetes.io/cinder` provisioner kubectl create -f - <<EOY apiVersion: storage.k8s.io/v1 kind: StorageClass metadata: name: openstack-standard provisioner: kubernetes.io/cinder EOY # create a persistent volume claim using that storage class kubectl create -f - <<EOY kind: PersistentVolumeClaim apiVersion: v1 metadata: name: testclaim spec: accessModes: - ReadWriteOnce resources: requests: storage: 100Mi storageClassName: openstack-standard EOY # create the busybox pod with a volume using that PVC: kubectl create -f - <<EOY apiVersion: v1 kind: Pod metadata: name: busybox namespace: default spec: containers: - image: busybox command: - sleep - "3600" imagePullPolicy: IfNotPresent name: busybox volumeMounts: - mountPath: "/pv" name: testvolume restartPolicy: Always volumes: - name: testvolume persistentVolumeClaim: claimName: testclaim EOY
Creating a service with a OpenStack load-balancer
The following script starts the hello-world pod behind a OpenStack-backed load-balancer.
#!/bin/bash kubectl run hello-world --replicas=5 --labels="run=load-balancer-example" --image=gcr.io/google-samples/node-hello:1.0 --port=8080 kubectl expose deployment hello-world --type=LoadBalancer --name=hello watch kubectl get svc -o wide --selector=run=load-balancer-example
- (string) The URL of the keystone API used to authenticate. On OpenStack control panels, this can be found at Access and Security > API Access > Credentials.
- (string) The base64-encoded contents of a JSON file containing OpenStack credentials. The credentials must contain the following keys: auth-url, username, password, project-name, user-domain-name, and project-domain-name. It could also contain a base64-encoded CA certificate in endpoint-tls-ca key value. This can be used from bundles with 'include-base64://' (see https://jujucharms.com/docs/stable/charms-bundles#setting-charm-configurations-options-in-a-bundle), or from the command-line with 'juju config openstack credentials="$(base64 /path/to/file)"'. It is strongly recommended that you use 'juju trust' instead, if available.
- (string) A CA certificate that can be used to verify the target cloud API endpoints. Use 'include-base64://' in a bundle to include a certificate. Otherwise, pass a base64-encoded certificate (base64 of "-----BEGIN" to "-----END") as a config option in a Juju CLI invocation.
- (string) Floating IP network ID that should be used to set FIPs for load balancers.
- (string) Specifies an algorithm load balancer, that should be one between ROUND_ROBIN, LEAST_CONNECTIONS, SOURCE_IP.
- (boolean) Whether or not the Load Balancer should automatically manage security groups rule. In case it is set to false, Load Balancer rules will be added to project (tenant) default security-group. In case it is set to true, a new security-group will be created for each Load Balancer, as well as its corresponding rules. It is advised to set appropriate number of security-groups and rules.
- (string) Password of a valid user set in keystone.
- (string) Name of the project domain where you want to create your resources.
- (string) Name of project where you want to create your resources.
- (string) Name of the region where you want to create your resources.
- (string) Subnet ID from OpenStack that will be used to setup Load Balancers. Flag LoadBalancer becomes active on cloud.conf file only if this config is set.
- (string) Name of the user domain where you want to create your resources.
- (string) Username of a valid user set in keystone.