En los clústeres de Anthos en equipos físicos, los clústeres híbridos realizan la doble función de un clúster de administrador y un clúster de usuario. Ejecutan cargas de trabajo y, al mismo tiempo, administran otros clústeres y a ellos mismos.
Los clústeres híbridos eliminan la necesidad de ejecutar un clúster de administrador independiente en situaciones con recursos limitados y pueden proporcionar confiabilidad con alta disponibilidad (HA). En un clúster independiente con HA, si un nodo falla, los otros tomarán su lugar.
Los clústeres híbridos se diferencian de los clústeres independientes en que también pueden administrar otros clústeres. Los clústeres independientes no pueden crear ni administrar otros clústeres.
Sin embargo, cuando creas clústeres híbridos, se generan compensaciones entre la flexibilidad y la seguridad. Dado que los clústeres híbridos se administran por sí mismos, la ejecución de cargas de trabajo en el mismo clúster aumenta el riesgo de exposición a la seguridad de los datos administrativos sensibles, como las claves SSH.
Crea un clúster híbrido con un plano de control de alta disponibilidad (HA) mediante
el comando bmctl
. El comando bmctl
se puede ejecutar en una estación de trabajo independiente o en una
de los nodos del clúster híbrido.
Requisitos previos:
- Descargar
bmctl
degs://anthos-baremetal-release/bmctl/1.6.2/linux-amd64/bmctl
- La estación de trabajo que ejecuta bmctl debe tener conectividad de red a todos los nodos en el clúster híbrido de destino.
- La estación de trabajo que ejecuta bmctl debe tener conectividad de red al VIP del plano de control del clúster híbrido de destino.
- La clave SSH que se usa para crear el clúster híbrido debe estar disponible como raíz o debes tener acceso de usuario SUDO en todos los nodos del clúster híbrido de destino.
Consulta la guía de inicio rápido de los clústeres de Anthos en equipos físicos para obtener instrucciones detalladas sobre cómo crear un clúster híbrido.
Accede a gcloud y crea un archivo de configuración de clúster híbrido
- Accede a gcloud como un usuario con el acceso
gcloud auth application-default
: - Administrador de cuenta de servicio
- Administrador de clave de cuenta de servicio
- Administrador de IAM de proyecto
- Lector de Compute
- Administrador de Service Usage
- Obtén tu ID del proyecto de Cloud para usarlo con la creación del clúster:
gcloud auth application-default login
export GOOGLE_APPLICATION_CREDENTIALS=JSON_KEY_FILE
export CLOUD_PROJECT_ID=$(gcloud config get-value project)
Crea el clúster híbrido con bmctl
Después de acceder a gcloud y configurar el proyecto, puedes crear el archivo de configuración del clúster con el comando bmctl
. Ten en cuenta que, en este ejemplo, todas las cuentas de servicio se crean automáticamente mediante el comando bmctl create config
:
bmctl create config -c HYBRID_CLUSTER_NAME --enable-apis \ --create-service-accounts --project-id=CLOUD_PROJECT_ID
A continuación, se muestra un ejemplo a fin de crear un archivo de configuración para un clúster híbrido llamado hybrid1
asociado con el ID del proyecto my-gcp-project
:
bmctl create config -c hybrid1 --create-service-accounts --project-id=my-gcp-project
El archivo se escribe en bmctl-workspace/hybrid1/hybrid1.yaml.
Como alternativa a habilitar las API y crear cuentas de servicio automáticamente, también puedes proporcionar tus cuentas de servicio existentes con los permisos de IAM adecuados. Esto significa que puedes omitir la creación automática de cuentas de servicio en el paso anterior en el comando bmctl
:
bmctl create config -c hybrid1
Edita el archivo de configuración del clúster
Ahora que tienes un archivo de configuración de clúster, edítalo para realizar los siguientes cambios:
- Proporciona la clave privada SSH para acceder a los nodos del clúster híbrido:
- Cambia la configuración para especificar un tipo de clúster de
hybrid
en lugar deadmin
: - Cambia la configuración para especificar un plano de control de varios nodos y alta disponibilidad (opcional). Especifica un número impar de nodos para tener el mayor quórum para la HA:
# bmctl configuration variables. Because this section is valid YAML but not a valid Kubernetes # resource, this section can only be included when using bmctl to # create the initial admin/hybrid cluster. Afterwards, when creating user clusters by directly # applying the cluster and node pool resources to the existing cluster, you must remove this # section. gcrKeyPath: /bmctl/bmctl-workspace/.sa-keys/my-gcp-project-anthos-baremetal-gcr.json sshPrivateKeyPath: /path/to/your/ssh_private_key gkeConnectAgentServiceAccountKeyPath: /bmctl/bmctl-workspace/.sa-keys/my-gcp-project-anthos-baremetal-connect.json gkeConnectRegisterServiceAccountKeyPath: /bmctl/bmctl-workspace/.sa-keys/my-gcp-project-anthos-baremetal-register.json cloudOperationsServiceAccountKeyPath: /bmctl/bmctl-workspace/.sa-keys/my-gcp-project-anthos-baremetal-cloud-ops.json
spec: # Cluster type. This can be: # 1) admin: to create an admin cluster. This can later be used to create user clusters. # 2) user: to create a user cluster. Requires an existing admin cluster. # 3) hybrid: to create a hybrid cluster that runs admin cluster components and user workloads. # 4) standalone: to create a cluster that manages itself, runs user workloads, but does not manage other clusters. type: hybrid
# Control plane configuration controlPlane: nodePoolSpec: nodes: # Control plane node pools. Typically, this is either a single machine # or 3 machines if using a high availability deployment. - address: 10.200.0.4 - address: 10.200.0.5 - address: 10.200.0.6
Crea el clúster híbrido con la configuración del clúster
Usa el comando bmctl
para implementar el clúster:
bmctl create cluster -c CLUSTER_NAME
CLUSTER_NAME especifica el nombre del clúster que creaste en la sección anterior.
A continuación, se muestra un ejemplo del comando para crear un archivo de configuración de un clúster llamado hybrid1
:
bmctl create cluster -c hybrid1
Muestra de la configuración completa de clústeres híbridos
El siguiente es un archivo de configuración del clúster híbrido de muestra creado con el comando bmctl
.
Ten en cuenta que en esta configuración de muestra, se usan nombres de clústeres, VIP y direcciones de marcadores de posición. Es posible que no funcionen con tu red.
gcrKeyPath: /bmctl/bmctl-workspace/.sa-keys/my-gcp-project-anthos-baremetal-gcr.json sshPrivateKeyPath: /bmctl/bmctl-workspace/.ssh/id_rsa gkeConnectAgentServiceAccountKeyPath: /bmctl/bmctl-workspace/.sa-keys/my-gcp-project-anthos-baremetal-connect.json gkeConnectRegisterServiceAccountKeyPath: /bmctl/bmctl-workspace/.sa-keys/my-gcp-project-anthos-baremetal-register.json cloudOperationsServiceAccountKeyPath: /bmctl/bmctl-workspace/.sa-keys/my-gcp-project-anthos-baremetal-cloud-ops.json --- apiVersion: v1 kind: Namespace metadata: name: cluster-hybrid1 --- apiVersion: baremetal.cluster.gke.io/v1 kind: Cluster metadata: name: hybrid1 namespace: cluster-hybrid1 spec: # Cluster type. This can be: # 1) admin: to create an admin cluster. This can later be used to create user clusters. # 2) user: to create a user cluster. Requires an existing admin cluster. # 3) hybrid: to create a hybrid cluster that runs admin cluster components and user workloads. # 4) standalone: to create a cluster that manages itself, runs user workloads, but does not manage other clusters. type: hybrid # Anthos cluster version. anthosBareMetalVersion: 1.6.2 # GKE connect configuration gkeConnect: projectID: $GOOGLE_PROJECT_ID # Control plane configuration controlPlane: nodePoolSpec: nodes: # Control plane node pools. Typically, this is either a single machine # or 3 machines if using a high availability deployment. - address: 10.200.0.4 - address: 10.200.0.5 - address: 10.200.0.6 # Cluster networking configuration clusterNetwork: # Pods specify the IP ranges from which Pod networks are allocated. pods: cidrBlocks: - 192.168.0.0/16 # Services specify the network ranges from which service VIPs are allocated. # This can be any RFC 1918 range that does not conflict with any other IP range # in the cluster and node pool resources. services: cidrBlocks: - 10.96.0.0/12 # Load balancer configuration loadBalancer: # Load balancer mode can be either 'bundled' or 'manual'. # In 'bundled' mode a load balancer will be installed on load balancer nodes during cluster creation. # In 'manual' mode the cluster relies on a manually-configured external load balancer. mode: bundled # Load balancer port configuration ports: # Specifies the port the LB serves the kubernetes control plane on. # In 'manual' mode the external load balancer must be listening on this port. controlPlaneLBPort: 443 # There are two load balancer VIPs: one for the control plane and one for the L7 Ingress # service. The VIPs must be in the same subnet as the load balancer nodes. vips: # ControlPlaneVIP specifies the VIP to connect to the Kubernetes API server. # This address must not be in the address pools below. controlPlaneVIP: 10.200.0.71 # IngressVIP specifies the VIP shared by all services for ingress traffic. # Allowed only in non-admin clusters. # This address must be in the address pools below. ingressVIP: 10.200.0.72 # AddressPools is a list of non-overlapping IP ranges for the data plane load balancer. # All addresses must be in the same subnet as the load balancer nodes. # Address pool configuration is only valid for 'bundled' LB mode in non-admin clusters. addressPools: - name: pool1 addresses: # Each address must be either in the CIDR form (1.2.3.0/24) # or range form (1.2.3.1-1.2.3.5). - 10.200.0.72-10.200.0.90 # A load balancer nodepool can be configured to specify nodes used for load balancing. # These nodes are part of the kubernetes cluster and run regular workloads as well as load balancers. # If the node pool config is absent then the control plane nodes are used. # Node pool configuration is only valid for 'bundled' LB mode. # nodePoolSpec: # nodes: # - address: <Machine 1 IP> # Proxy configuration # proxy: # url: http://[username:password@]domain # # A list of IPs, hostnames or domains that should not be proxied. # noProxy: # - 127.0.0.1 # - localhost # Logging and Monitoring clusterOperations: # Cloud project for logs and metrics. projectID: <Google Project ID>$GOOGLE_PROJECT_ID # Cloud location for logs and metrics. location: us-central1 # Whether collection of application logs/metrics should be enabled (in addition to # collection of system logs/metrics which correspond to system components such as # Kubernetes control plane or cluster management agents). # enableApplication: false # Storage configuration storage: # lvpNodeMounts specifies the config for local PersistentVolumes backed by mounted disks. # These disks need to be formatted and mounted by the user, which can be done before or after # cluster creation. lvpNodeMounts: # path specifies the host machine path where mounted disks will be discovered and a local PV # will be created for each mount. path: /mnt/localpv-disk # storageClassName specifies the StorageClass that PVs will be created with. The StorageClass # is created during cluster creation. storageClassName: local-disks # lvpShare specifies the config for local PersistentVolumes backed by subdirectories in a shared filesystem. # These subdirectories are automatically created during cluster creation. lvpShare: # path specifies the host machine path where subdirectories will be created on each host. A local PV # will be created for each subdirectory. path: /mnt/localpv-share # storageClassName specifies the StorageClass that PVs will be created with. The StorageClass # is created during cluster creation. storageClassName: local-shared # numPVUnderSharedPath specifies the number of subdirectories to create under path. numPVUnderSharedPath: 5 # Authentication; uncomment this section if you wish to enable authentication to the cluster with OpenID Connect. # authentication: # oidc: # # issuerURL specifies the URL of your OpenID provider, such as "https://accounts.google.com". The Kubernetes API # # server uses this URL to discover public keys for verifying tokens. Must use HTTPS. # issuerURL: <URL for OIDC Provider; required> # # clientID specifies the ID for the client application that makes authentication requests to the OpenID # # provider. # clientID: <ID for OIDC client application; required> # # clientSecret specifies the secret for the client application. # clientSecret: <Secret for OIDC client application; optional> # # kubectlRedirectURL specifies the redirect URL (required) for the gcloud CLI, such as # # "http://localhost:[PORT]/callback". # kubectlRedirectURL: <Redirect URL for the gcloud CLI; optional default is "http://kubectl.redirect.invalid" # # username specifies the JWT claim to use as the username. The default is "sub", which is expected to be a # # unique identifier of the end user. # username: <JWT claim to use as the username; optional, default is "sub"> # # usernamePrefix specifies the prefix prepended to username claims to prevent clashes with existing names. # usernamePrefix: <Prefix prepended to username claims; optional> # # group specifies the JWT claim that the provider will use to return your security groups. # group: <JWT claim to use as the group name; optional> # # groupPrefix specifies the prefix prepended to group claims to prevent clashes with existing names. # groupPrefix: <Prefix prepended to group claims; optional> # # scopes specifies additional scopes to send to the OpenID provider as a comma-delimited list. # scopes: Additional scopes to send to OIDC provider as a comma-separated list; optional> # # extraParams specifies additional key-value parameters to send to the OpenID provider as a comma-delimited # # list. # extraParams: Additional key-value parameters to send to OIDC provider as a comma-separated list; optional> # # certificateAuthorityData specifies a Base64 PEM-encoded certificate authority certificate of your identity # # provider. It's not needed if your identity provider's certificate was issued by a well-known public CA. # certificateAuthorityData: Base64 PEM-encoded certificate authority certificate of your OIDC provider; optional> # Node access configuration; uncomment this section if you wish to use a non-root user # with passwordless sudo capability for machine login. # nodeAccess: # loginUser: login user name --- # Node pools for worker nodes apiVersion: baremetal.cluster.gke.io/v1 kind: NodePool metadata: name: node-pool-1 namespace: cluster-hybrid1 spec: clusterName: hybrid1 nodes: - address: 10.200.0.7 - address: 10.200.0.8