Trying Metal3 on a development environment
Ready to start taking steps towards your first experience with metal3? Follow these commands to get started!
1. Environment Setup
info: “Naming” For the v1alpha3 release, the Cluster API provider for Metal3 was renamed from Cluster API provider BareMetal (CAPBM) to Cluster API provider Metal3 (CAPM3). Hence, from v1alpha3 onwards it is Cluster API provider Metal3.
1.1. Prerequisites
- System with CentOS 9 Stream or Ubuntu 22.04
- Bare metal preferred, as we will be creating VMs to emulate bare metal hosts
- Run as a user with passwordless sudo access
- Minimum resource requirements for the host machine: 4C CPUs, 16 GB RAM memory
For execution with VMs
- Setup passwordless sudo access
sudo visudo
- Include this line at the end of the sudoers file
username ALL=(ALL) NOPASSWD: ALL
- Save and exit
- Manually enable nested virtualization if you don’t have it enabled in your VM
# To enable nested virtualization
# On Centos 9 streams (other distros may vary)
# check the current setting
$ sudo cat /sys/module/kvm_intel/parameters/nested
N # disabled
$ sudo vi /etc/modprobe.d/kvm.conf
# uncomment either of the line
# for Intel CPU, select [kvm_intel], for AMD CPU, select [kvm_amd]
options kvm_intel nested=1
#options kvm_amd nested=1
# unload
$ sudo modprobe -r kvm_intel
# reload
$ sudo modprobe kvm_intel
$ sudo cat /sys/module/kvm_intel/parameters/nested
Y # just enabled
1.2. Setup
info: “Information” If you need detailed information regarding the process of creating a Metal³ emulated environment using metal3-dev-env, it is worth taking a look at the blog post “A detailed walkthrough of the Metal³ development environment”.
This is a high-level architecture of the Metal³-dev-env. Note that for an Ubuntu-based setup, either Kind or Minikube can be used to instantiate an ephemeral cluster, while for a CentOS-based setup, only Minikube is currently supported. The ephemeral cluster creation tool can be manipulated with the EPHEMERAL_CLUSTER environment variable.
The short version is: clone metal³-dev-env and run
make
The Makefile runs a series of scripts, described here:
-
01_prepare_host.sh- Installs all needed packages. -
02_configure_host.sh- Creates a set of VMs that will be managed as if they were bare metal hosts. It also downloads some images needed for Ironic. -
03_launch_mgmt_cluster.sh- Launches a management cluster usingminikubeorkindand runs thebaremetal-operatoron that cluster. -
04_verify.sh- Runs a set of tests that verify that the deployment was completed successfully.
When the environment setup is completed, you should be able to see the BareMetalHost (bmh) objects in the Ready state.
1.3. Tear Down
To tear down the environment, run
make clean
info “Note” When redeploying metal³-dev-env with a different release version of CAPM3, you must set the
FORCE_REPO_UPDATEvariable inconfig_${user}.shto true. warning “Warning” If you see this error during the installation:error: failed to connect to the hypervisor \ error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Permission deniedYou may need to log out then log in again, and run
make cleanandmakeagain.
1.4. Using Custom Image
Whether you want to run target cluster Nodes with your own image, you can override the three following variables: IMAGE_NAME,
IMAGE_LOCATION, IMAGE_USERNAME. If the requested image with the name IMAGE_NAME does not
exist in the IRONIC_IMAGE_DIR (/opt/metal3-dev-env/ironic/html/images) folder, then it will be automatically
downloaded from the IMAGE_LOCATION value configured.
1.5. Setting environment variables
info “Environment variables” More information about the specific environment variables used to set up metal3-dev-env can be found here.
To set environment variables persistently, export them from the configuration file used by metal³-dev-env scripts:
cp config_example.sh config_$(whoami).sh
vim config_$(whoami).sh
2. Working with the Development Environment
2.1. BareMetalHosts
This environment creates a set of VMs to manage as if they were bare metal hosts.
There are two different host OSs that the metal3-dev-env setup process is tested on.
- Host VM/Server on CentOS, while the target can be Ubuntu or CentOS, Cirros, or FCOS.
- Host VM/Server on Ubuntu, while the target can be Ubuntu or CentOS, Cirros, or FCOS.
The way the k8s cluster is running in the above two scenarios is different. For CentOS minikube cluster is used as the source cluster, for Ubuntu, a kind cluster is being created.
As such, when the host (where the make command was issued) OS is CentOS, there should be three libvirt VMs and one of them should be a minikube VM.
In case the host OS is Ubuntu, the k8s source cluster is created by using kind, so in this case the minikube VM won’t be present.
To configure what tool should be used for creating source k8s cluster the EPHEMERAL_CLUSTER environment variable is responsible.
The EPHEMERAL_CLUSTER is configured to build minikube cluster by default on a CentOS host and kind cluster on a Ubuntu host.
VMs can be listed using virsh cli tool.
In case the EPHEMERAL_CLUSTER environment variable is set to kind the list of
running virtual machines will look like this:
$ sudo virsh list
Id Name State
--------------------------
1 node_0 running
2 node_1 running
In case the EPHEMERAL_CLUSTER environment variable is set to minikube the list of
running virtual machines will look like this:
$ sudo virsh list
Id Name State
--------------------------
1 minikube running
2 node_0 running
3 node_1 running
Each of the VMs (aside from the minikube management cluster VM) is
represented by BareMetalHost objects in our management cluster. The yaml
definition file used to create these host objects is in ${WORKING_DIR}/bmhosts_crs.yaml.
$ kubectl get baremetalhosts -n metal3 -o wide
NAME STATUS STATE CONSUMER BMC HARDWARE_PROFILE ONLINE ERROR AGE
node-0 OK available ipmi://192.168.111.1:6230 unknown true 58m
node-1 OK available redfish+http://192.168.111.1:8000/redfish/v1/Systems/492fcbab-4a79-40d7-8fea-a7835a05ef4a unknown true 58m
You can also look at the details of a host, including the hardware information gathered by doing pre-deployment introspection.
$ kubectl get baremetalhost -n metal3 -o yaml node-0
apiVersion: metal3.io/v1alpha1
kind: BareMetalHost
metadata:
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"metal3.io/v1alpha1","kind":"BareMetalHost","metadata":{"annotations":{},"name":"node-0","namespace":"metal3"},"spec":{"bmc":{"address":"ipmi://192.168.111.1:6230","credentialsName":"node-0-bmc-secret"},"bootMACAddress":"00:ee:d0:b8:47:7d","bootMode":"legacy","online":true}}
creationTimestamp: "2021-07-12T11:04:10Z"
finalizers:
- baremetalhost.metal3.io
generation: 1
name: node-0
namespace: metal3
resourceVersion: "3243"
uid: 3bd8b945-a3e8-43b9-b899-2f869680d28c
spec:
automatedCleaningMode: metadata
bmc:
address: ipmi://192.168.111.1:6230
credentialsName: node-0-bmc-secret
bootMACAddress: 00:ee:d0:b8:47:7d
bootMode: legacy
online: true
status:
errorCount: 0
errorMessage: ""
goodCredentials:
credentials:
name: node-0-bmc-secret
namespace: metal3
credentialsVersion: "1789"
hardware:
cpu:
arch: x86_64
clockMegahertz: 2694
count: 2
flags:
- aes
- apic
# There are many more flags but they are not listed in this example.
model: Intel Xeon E3-12xx v2 (Ivy Bridge)
firmware:
bios:
date: 04/01/2014
vendor: SeaBIOS
version: 1.13.0-1ubuntu1.1
hostname: node-0
nics:
- ip: 172.22.0.20
mac: 00:ee:d0:b8:47:7d
model: 0x1af4 0x0001
name: enp1s0
pxe: true
- ip: fe80::1863:f385:feab:381c%enp1s0
mac: 00:ee:d0:b8:47:7d
model: 0x1af4 0x0001
name: enp1s0
pxe: true
- ip: 192.168.111.20
mac: 00:ee:d0:b8:47:7f
model: 0x1af4 0x0001
name: enp2s0
- ip: fe80::521c:6a5b:f79:9a75%enp2s0
mac: 00:ee:d0:b8:47:7f
model: 0x1af4 0x0001
name: enp2s0
ramMebibytes: 4096
storage:
- hctl: "0:0:0:0"
model: QEMU HARDDISK
name: /dev/sda
rotational: true
serialNumber: drive-scsi0-0-0-0
sizeBytes: 53687091200
type: HDD
vendor: QEMU
systemVendor:
manufacturer: QEMU
productName: Standard PC (Q35 + ICH9, 2009)
hardwareProfile: unknown
lastUpdated: "2021-07-12T11:08:53Z"
operationHistory:
deprovision:
end: null
start: null
inspect:
end: "2021-07-12T11:08:23Z"
start: "2021-07-12T11:04:55Z"
provision:
end: null
start: null
register:
end: "2021-07-12T11:04:55Z"
start: "2021-07-12T11:04:44Z"
operationalStatus: OK
poweredOn: true
provisioning:
ID: 8effe29b-62fe-4fb6-9327-a3663550e99d
bootMode: legacy
image:
url: ""
rootDeviceHints:
deviceName: /dev/sda
state: ready
triedCredentials:
credentials:
name: node-0-bmc-secret
namespace: metal3
credentialsVersion: "1789"
2.2. Provision Cluster and Machines
This section describes how to trigger the provisioning of a cluster and hosts via
Machine objects as part of the Cluster API integration. This uses Cluster API
v1beta1 and
assumes that metal3-dev-env is deployed with the environment variable
CAPM3_VERSION set to v1beta1. This is the default behaviour. The v1beta1 deployment can be done with
Ubuntu 22.04 or Centos 9 Stream target host images. Please make sure to meet
resource requirements for successful deployment:
See support version for more on CAPI compatibility
The following scripts can be used to provision a cluster, controlplane node and worker node.
./tests/scripts/provision/cluster.sh
./tests/scripts/provision/controlplane.sh
./tests//scripts/provision/worker.sh
At this point, the Machine actuator will respond and try to claim a
BareMetalHost for this Metal3Machine. You can check the logs of the actuator.
First, check the names of the pods running in the baremetal-operator-system namespace and the output should be something similar
to this:
$ kubectl -n baremetal-operator-system get pods
NAME READY STATUS RESTARTS AGE
baremetal-operator-controller-manager-5fd4fb6c8-c9prs 2/2 Running 0 71m
In order to get the logs of the actuator the logs of the baremetal-operator-controller-manager instance have to be queried with the following command:
$ kubectl logs -n baremetal-operator-system pod/baremetal-operator-controller-manager-5fd4fb6c8-c9prs -c manager
...
{"level":"info","ts":1642594214.3598707,"logger":"controllers.BareMetalHost","msg":"done","baremetalhost":"metal3/node-1", "provisioningState":"provisioning","requeue":true,"after":10}
...
Keep in mind that the suffix hashes e.g. 5fd4fb6c8-c9prs are automatically generated and change in case of a different
deployment.
If you look at the yaml representation of the Metal3Machine object, you will see a
new annotation that identifies which BareMetalHost was chosen to satisfy this
Metal3Machine request.
First list the Metal3Machine objects present in the metal3 namespace:
$ kubectl get metal3machines -n metal3
NAME PROVIDERID READY CLUSTER PHASE
test1-controlplane-jjd9l metal3://d4848820-55fd-410a-b902-5b2122dd206c true test1
test1-workers-bx4wp metal3://ee337588-be96-4d5b-95b9-b7375969debd true test1
Based on the name of the Metal3Machine objects you can check the yaml representation of the object and
see from its annotation which BareMetalHost was chosen.
$ kubectl get metal3machine test1-workers-bx4wp -n metal3 -o yaml
...
annotations:
metal3.io/BareMetalHost: metal3/node-1
...
You can also see in the list of BareMetalHosts that one of the hosts is now
provisioned and associated with a Metal3Machines by looking at the CONSUMER output column of the following command:
$ kubectl get baremetalhosts -n metal3
NAME STATE CONSUMER ONLINE ERROR AGE
node-0 provisioned test1-controlplane-jjd9l true 122m
node-1 provisioned test1-workers-bx4wp true 122m
It is also possible to check which Metal3Machine serves as the infrastructure for the ClusterAPI Machine
objects.
First list the Machine objects:
$ kubectl get machine -n metal3
NAME CLUSTER NODENAME PROVIDERID PHASE AGE VERSION
test1-6d8cc5965f-wvzms test1 test1-6d8cc5965f-wvzms metal3://7f51f14b-7701-436a-85ba-7dbc7315b3cb Running 53m v1.22.3
test1-nphjx test1 test1-nphjx metal3://14fbcd25-4d09-4aca-9628-a789ba3e175c Running 55m v1.22.3
As a next step you can check what serves as the infrastructure backend for e.g. test1-6d8cc5965f-wvzms Machine
object:
$ kubectl get machine test1-6d8cc5965f-wvzms -n metal3 -o yaml
...
infrastructureRef:
apiVersion: infrastructure.cluster.x-k8s.io/v1beta1
kind: Metal3Machine
name: test1-workers-bx4wp
namespace: metal3
uid: 39362b32-ebb7-4117-9919-67510ceb177f
...
Based on the result of the query test1-6d8cc5965f-wvzms ClusterAPI Machine object is backed by
test1-workers-bx4wp Metal3Machine object.
You should be able to ssh into your host once provisioning is completed.
The default username for both CentOS & Ubuntu images is metal3.
For the IP address, you can either use the API endpoint IP of the target cluster
which is - 192.168.111.249 by default or use the predictable IP address of the first
master node - 192.168.111.100.
ssh metal3@192.168.111.249
2.3. Deprovision Cluster and Machines
Deprovisioning of the target cluster is done just by deleting Cluster and Machine objects or by executing the de-provisioning scripts in reverse order than provisioning:
./tests/scripts/deprovision/worker.sh
./tests/scripts/deprovision/controlplane.sh
./tests/scripts/deprovision/cluster.sh
Note that you can easily de-provision worker Nodes by decreasing the number of replicas in the MachineDeployment object created when executing the provision/worker.sh script:
kubectl scale machinedeployment test1 -n metal3 --replicas=0
warning “Warning” control-plane and cluster are very tied together. This means that you are not able to de-provision the control-plane of a cluster and then provision a new one within the same cluster. Therefore, in case you want to de-provision the control-plane you need to de-provision the cluster as well and provision both again.
Below, it is shown how the de-provisioning can be executed in a more manual way by just deleting the proper Custom Resources (CR).
The order of deletion is:
- Machine objects of the workers
- Metal3Machine objects of the workers
- Machine objects of the control plane
- Metal3Machine objects of the control plane
- The cluster object
An additional detail is that the Machine object test1-workers-bx4wp is controlled by the test1 MachineDeployment
the object thus in order to avoid reprovisioning of the Machine object the MachineDeployment has to be deleted instead of the Machine object in the case of test1-workers-bx4wp.
$ # By deleting the Machine or MachineDeployment object the related Metal3Machine object(s) should be deleted automatically.
$ kubectl delete machinedeployment test1 -n metal3
machinedeployment.cluster.x-k8s.io "test1" deleted
$ # The "machinedeployment.cluster.x-k8s.io "test1" deleted" output will be visible almost instantly but that doesn't mean that the related Machine
$ # object(s) has been deleted right away, after the deletion command is issued the Machine object(s) will enter a "Deleting" state and they could stay in that state for minutes
$ # before they are fully deleted.
$ kubectl delete machine test1-m77bn -n metal3
machine.cluster.x-k8s.io "test1-m77bn" deleted
$ # When a Machine object is deleted directly and not by deleting a MachineDeployment the "machine.cluster.x-k8s.io "test1-m77bn" deleted" will be only visible when the Machine and the
$ # related Metal3Machine object has been fully removed from the cluster. The deletion process could take a few minutes thus the command line will be unresponsive (blocked) for the time being.
$ kubectl delete cluster test1 -n metal3
cluster.cluster.x-k8s.io "test1" deleted
Once the deletion has finished, you can see that the BareMetalHosts are offline and Cluster object is not present anymore
$ kubectl get baremetalhosts -n metal3
NAME STATE CONSUMER ONLINE ERROR AGE
node-0 available false 160m
node-1 available false 160m
$ kubectl get cluster -n metal3
No resources found in metal3 namespace.
2.4. Running Custom Baremetal-Operator
The baremetal-operator comes up running in the cluster by default, using an
image built from the metal3-io/baremetal-operator repository. If you’d like to test changes to the
baremetal-operator, you can follow this process.
First, you must scale down the deployment of the baremetal-operator running
in the cluster.
kubectl scale deployment baremetal-operator-controller-manager -n baremetal-operator-system --replicas=0
To be able to run baremetal-operator locally, you need to install
operator-sdk. After that, you can run
the baremetal-operator including any custom changes.
cd ~/go/src/github.com/metal3-io/baremetal-operator
make run
2.5. Running Custom Cluster API Provider Metal3
There are two Cluster API-related managers running in the cluster. One includes a set of generic controllers, and the other includes a custom Machine controller for Metal3.
Tilt development environment
Tilt setup can deploy CAPM3 in a local kind cluster. Since
Tilt is applied in the metal3-dev-env deployment, you can make changes inside
the cluster-api-provider-metal3 folder and Tilt will deploy the changes
automatically.
If you deployed CAPM3 separately and want to make changes to it, then
follow CAPM3 instructions. This will save you from
having to build all of the images for CAPI, which can take a while. If the
scope of your development will span both CAPM3 and CAPI, then follow the
CAPI and CAPM3 instructions.
2.6. Accessing Ironic API
Sometimes you may want to look directly at Ironic to debug something. The metal3-dev-env repository contains clouds.yaml file with connection settings for Ironic.
Metal3-dev-env will install the unified OpenStack and standalone OpenStack Ironic command-line clients on the provisioning host as part of setting up the cluster.
Note that currently, you can use either a unified OpenStack client or an Ironic client. In this example, we are using an Ironic client to interact with the Ironic API.
Please make sure to export
CONTAINER_RUNTIME environment variable before you execute
commands.
Example:
[notstack@metal3 metal3-dev-env]$ export CONTAINER_RUNTIME=docker
[notstack@metal3 metal3-dev-env]$ baremetal node list
+--------------------------------------+---------------+--------------------------------------+-------------+--------------------+-------------+
| UUID | Name | Instance UUID | Power State | Provisioning State | Maintenance |
+--------------------------------------+---------------+--------------------------------------+-------------+--------------------+-------------+
| b423ee9c-66d8-48dd-bd6f-656b93140504 | metal3~node-1 | 7f51f14b-7701-436a-85ba-7dbc7315b3cb | power off | available | False |
| 882533c5-2f14-49f6-aa44-517e1e404fd8 | metal3~node-0 | 14fbcd25-4d09-4aca-9628-a789ba3e175c | power off | available | False |
+--------------------------------------+---------------+--------------------------------------+-------------+--------------------+-------------+
To view a particular node’s details, run the below command. The
last_error, maintenance_reason, and provisioning_state fields are
useful for troubleshooting to find out why a node did not deploy.
[notstack@metal3 metal3-dev-env]$ baremetal node show b423ee9c-66d8-48dd-bd6f-656b93140504
+------------------------+------------------------------------------------------------+
| Field | Value |
+------------------------+------------------------------------------------------------+
| allocation_uuid | None |
| automated_clean | True |
| bios_interface | redfish |
| boot_interface | ipxe |
| chassis_uuid | None |
| clean_step | {} |
| conductor | 172.22.0.2 |
| conductor_group | |
| console_enabled | False |
| console_interface | no-console |
| created_at | 2022-01-19T10:56:06+00:00 |
| deploy_interface | direct |
| deploy_step | {} |
| description | None |
| driver | redfish |
| driver_info | {u'deploy_kernel': u'http://172.22.0.2:6180/images/ironic-python-agent.kernel', u'deploy_ramdisk': u'http://172.22.0.2:6180/images/ironic-python-agent.initramfs', u'redfish_address': u'http://192.168.111.1:8000', u'redfish_password': u'******', u'redfish_system_id': u'/redfish/v1/Systems/492fcbab-4a79-40d7-8fea-a7835a05ef4a', u'redfish_username': u'admin', u'force_persistent_boot_device': u'Default'} |
| driver_internal_info | {u'last_power_state_change': u'2022-01-19T13:04:01.981882', u'agent_version': u'8.3.1.dev2', u'agent_last_heartbeat': u'2022-01-19T13:03:51.874842', u'clean_steps': None, u'agent_erase_devices_iterations': 1, u'agent_erase_devices_zeroize': True, u'agent_continue_if_secure_erase_failed': False, u'agent_continue_if_ata_erase_failed': False, u'agent_enable_nvme_secure_erase': True, u'disk_erasure_concurrency': 1, u'agent_erase_skip_read_only': False, u'hardware_manager_version': {u'generic_hardware_manager': u'1.1'}, u'agent_cached_clean_steps_refreshed': u'2022-01-19 13:03:47.558697', u'deploy_steps': None, u'agent_cached_deploy_steps_refreshed': u'2022-01-19 12:09:34.731244'} |
| extra | {} |
| fault | None |
| inspect_interface | agent |
| inspection_finished_at | None |
| inspection_started_at | 2022-01-19T10:56:17+00:00 |
| instance_info | {u'capabilities': {}, u'image_source': u'http://172.22.0.1/images/CENTOS_8_NODE_IMAGE_K8S_v1.22.3-raw.img', u'image_os_hash_algo': u'md5', u'image_os_hash_value': u'http://172.22.0.1/images/CENTOS_8_NODE_IMAGE_K8S_v1.22.3-raw.img.md5sum', u'image_checksum': u'http://172.22.0.1/images/CENTOS_8_NODE_IMAGE_K8S_v1.22.3-raw.img.md5sum', u'image_disk_format': u'raw'} |
| instance_uuid | None |
| last_error | None |
| lessee | None |
| maintenance | False |
| maintenance_reason | None |
| management_interface | redfish |
| name | metal3~node-1 |
| network_data | {} |
| network_interface | noop |
| owner | None |
| power_interface | redfish |
| power_state | power off |
| properties | {u'capabilities': u'cpu_vt:true,cpu_aes:true,cpu_hugepages:true,boot_mode:bios', u'vendor': u'Sushy Emulator', u'local_gb': u'50', u'cpus': u'2', u'cpu_arch': u'x86_64', u'memory_mb': u'4096', u'root_device': {u'name': u's== /dev/sda'}} |
| protected | False |
| protected_reason | None |
| provision_state | available |
| provision_updated_at | 2022-01-19T13:03:52+00:00 |
| raid_config | {} |
| raid_interface | no-raid |
| rescue_interface | no-rescue |
| reservation | None |
| resource_class | None |
| retired | False |
| retired_reason | None |
| storage_interface | noop |
| target_power_state | None |
| target_provision_state | None |
| target_raid_config | {} |
| traits | [] |
| updated_at | 2022-01-19T13:04:03+00:00 |
| uuid | b423ee9c-66d8-48dd-bd6f-656b93140504 |
| vendor_interface | redfish |
+-------------------------------------------------------------------------------------+