Nei cluster Anthos su Bare Metal, i cluster utente eseguono i carichi di lavoro e, in un'architettura multi-cluster, i cluster utente vengono creati e gestiti da un cluster di amministrazione.
Dopo aver creato un cluster di amministrazione, chiamando il comando bmctl create config
viene creato un file yaml che puoi modificare per definire il cluster utente. Per applicare la configurazione e creare il cluster utente, puoi utilizzare il comando bmctl create
cluster
nei cluster Anthos su Bare Metal 1.7.0 e versioni successive. I controlli preliminari
sono applicabili ai cluster utente creati con il comando
bmctl create cluster
.
Mantenere i carichi di lavoro fuori dal cluster di amministrazione protegge i dati amministrativi sensibili, come le chiavi SSH archiviate nel cluster di amministrazione, da coloro che non hanno bisogno di accedere a tali informazioni. Inoltre, mantenere i cluster utente separati l'uno dall'altro offre una buona sicurezza generale per i tuoi carichi di lavoro.
Prerequisiti
- L'ultimo
bmctl
è scaricato (gs://anthos-baremetal-release/bmctl/1.7.7/linux-amd64/bmctl
) da Cloud Storage. - Cluster di amministrazione funzionante con accesso al server API del cluster (
controlPlaneVIP
). - I nodi dei cluster di amministrazione hanno una connettività di rete a tutti i nodi sul cluster utente di destinazione.
- La workstation che esegue
bmctl
ha una connettività di rete a tutti i nodi nei cluster utente di destinazione. - Chiave SSH utilizzata per creare il cluster utente disponibile per l'utente root o SUDO in tutti i nodi del cluster utente.
- Per le versioni 1.7.0 e successive, l'account di servizio Connect-register è configurato sul cluster di amministrazione per l'utilizzo con Connect.
Crea un file di configurazione del cluster utente
Il file di configurazione per la creazione di un cluster utente è quasi esattamente lo stesso di quello utilizzato per la creazione di un cluster di amministrazione. L'unica differenza è che rimuovi la sezione delle credenziali locali per rendere la configurazione una raccolta valida di risorse Kubernetes. La sezione di configurazione si trova nella parte superiore del file all'interno della sezione bmctl configuration variables
.
Per impostazione predefinita, i cluster utente ereditano le credenziali dal cluster di amministrazione che li gestisce. Puoi sostituire selettivamente alcune o tutte queste credenziali. Per ulteriori dettagli, consulta il file di configurazione del cluster utente di esempio.
Crea un file di configurazione del cluster utente con il comando
bmctl create config
:bmctl create config -c USER_CLUSTER_NAME
Ad esempio, esegui il comando seguente per creare un file di configurazione per un cluster utente chiamato
user1
:bmctl create config -c utente1
Il file è scritto in
bmctl-workspace/user1/user1.yaml
. Il percorso generico del file èbmctl-workspace/CLUSTER NAME/CLUSTER_NAME.yaml
Modifica il file di configurazione con le seguenti modifiche:
Rimuovi il percorso dei file delle credenziali locali dalla configurazione:
....
gcrKeyPath: (path to GCR service account key)sshPrivateKeyPath: (path to SSH private key, used for node access)gkeConnectAgentServiceAccountKeyPath: (path to Connect agent service account key)gkeConnectRegisterServiceAccountKeyPath: (path to Hub registration service account key)cloudOperationsServiceAccountKeyPath: (path to Cloud Operations service account key)....Modifica la configurazione per specificare un tipo di cluster
user
anzichéadmin
:.... 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: user ....
Assicurati che le specifiche dei cluster di amministrazione e degli utenti per i VIP e i pool di indirizzi del bilanciatore del carico siano complementari e non si sovrappongano ai cluster esistenti. Di seguito è riportato un esempio di configurazioni di amministratori e cluster utente, che specifica il bilanciamento del carico e i pool di indirizzi:
.... # Sample admin cluster config for load balancer and address pools loadBalancer: vips: controlPlaneVIP: 10.200.0.49 ingressVIP: 10.200.0.50 addressPools: - name: pool1 addresses: - 10.200.0.50-10.200.0.70 .... .... # Sample user cluster config for load balancer and address pools loadBalancer: vips: controlPlaneVIP: 10.200.0.71 ingressVIP: 10.200.0.72 addressPools: - name: pool1 addresses: - 10.200.0.72-10.200.0.90 ....
I file di configurazione del cluster utente sono gli stessi della configurazione del cluster di amministrazione.
Specifica la densità dei pod dei nodi del cluster e il runtime del container:
.... # NodeConfig specifies the configuration that applies to all nodes in the cluster. nodeConfig: # podDensity specifies the pod density configuration. podDensity: # maxPodsPerNode specifies at most how many pods can be run on a single node. maxPodsPerNode: 110 # containerRuntime specifies which container runtime to use for scheduling containers on nodes. # containerd and docker are supported. containerRuntime: containerd ....
Per i cluster utente, i valori consentiti per
maxPodsPerNode
sono32-250
. Il valore predefinito se non è specificato è110
. Una volta creato il cluster, questo valore non può essere aggiornato.La densità dei pod è limitata anche dalle risorse IP disponibili del tuo cluster. Per i dettagli, consulta Networking dei pod.
Crea il cluster utente
Esegui il comando bmctl
per applicare la configurazione del cluster utente e creare il cluster:
bmctl create cluster -c USER_CLUSTER_NAME --kubeconfig ADMIN_KUBECONFIG
Sostituisci quanto segue:
USER_CLUSTER_NAME
: il nome del cluster creato nella sezione precedente.ADMIN_KUBECONFIG
: il percorso del file kubeconfig del cluster di amministrazione.
Ad esempio, per un cluster utente denominato user1
e un file kubeconfig del cluster di amministrazione con il percorso kubeconfig bmctl-workspace/admin/admin-kubeconfig
, il comando sarebbe:
bmctl create cluster -c user1 --kubeconfig bmctl-workspace/admin/admin-kubeconfig
Esempio di configurazione completa del cluster utente
Di seguito è riportato un file di configurazione del cluster utente di esempio creato dal comando bmctl
. Nota che in questa configurazione di esempio vengono utilizzati nomi di cluster segnaposto, VIP e indirizzi. Potrebbero non funzionare per la tua rete. Le credenziali verranno ereditate dal cluster di amministrazione per impostazione predefinita. Se vuoi sostituire le credenziali, devi fornire i percorsi chiave corrispondenti nella sezione configuration variables
.
# Sample user cluster config:
# ---
# To override default credentials
# 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-user1
---
apiVersion: baremetal.cluster.gke.io/v1
kind: Cluster
metadata:
name: user1
namespace: cluster-user1
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: user
# Anthos cluster version.
anthosBareMetalVersion: 1.7.7
# 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
# 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 virtual IPs 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:
- 10.96.0.0/20
# 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 load balancer 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 virtual IP (VIP) addresses: 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.
# These IP addresses do not correspond to physical network interfaces.
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 node pool 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
# 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
# NodeConfig specifies the configuration that applies to all nodes in the cluster.
nodeConfig:
# podDensity specifies the pod density configuration.
podDensity:
# maxPodsPerNode specifies at most how many pods can be run on a single node.
maxPodsPerNode: 250
# containerRuntime specifies which container runtime to use for scheduling containers on nodes.
# containerd and docker are supported.
containerRuntime: containerd
# KubeVirt configuration, uncomment this section if you want to install kubevirt to the cluster
# kubevirt:
# # if useEmulation is enabled, hardware accelerator (i.e relies on cpu feature like vmx or svm)
# # will not be attempted. QEMU will be used for software emulation.
# # useEmulation must be specified for KubeVirt installation
# useEmulation: false
# 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>
# # proxy specifies the proxy server to use for the cluster to connect to your OIDC provider, if applicable.
# # Example: https://user:password@10.10.10.10:8888. If left blank, this defaults to no proxy.
# proxy: <Proxy server to use for the cluster to connect to your OIDC provider; optional, default is no proxy>
# # deployCloudConsoleProxy specifies whether to deploy a reverse proxy in the cluster to allow Google Cloud
# # Console access to the on-premises OIDC provider for authenticating users. If your identity provider is not
# # reachable over the public internet, and you wish to authenticate using Google Cloud console, then this field
# # must be set to true. If left blank, this field defaults to false.
# deployCloudConsoleProxy: <Whether to deploy a reverse proxy for Google Cloud console authentication; 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.
# # However, if deployCloudConsoleProxy is true, then this value must be provided, even for 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-user1
spec:
clusterName: user1
nodes:
- address: 10.200.0.5