Clusters GKE

O Kubernetes não é específico do fornecedor; no entanto, com o objetivo de fornecer instruções explícitas e completas para a implantação de todos os elementos de uma implementação de vários clusters do Kubernetes Operator, esta seção orienta você no processo de implantação de vários clusters do Kubernetes no GCP especificamente.

Pré-requisitos

Antes de começar, execute as seguintes ações:

Crie uma conta GCP.
Prepare um projeto GCP para que você possa usá-lo para criar clusters GKE (Google Kubernetes Engine).
Instale o GCP CLI.
Autentique com o comando gcloud auth login.
Atualize conforme necessário e defina as variáveis de ambiente definidas no arquivo env_variables.sh a seguir.

1# GCP project name - this is the only parameter that is mandatory to change here2export MDB_GKE_PROJECT="${MDB_GKE_PROJECT:="### Set your GKE project name here ###"}"3
4# Adjust the values for each Kubernetes cluster in your deployment.5# The deployment script references the following variables to get values for each cluster.6export K8S_CLUSTER_0="k8s-mdb-0${K8S_CLUSTER_SUFFIX:-""}"7export K8S_CLUSTER_0_ZONE="europe-central2-a"8export K8S_CLUSTER_0_NUMBER_OF_NODES=39export K8S_CLUSTER_0_MACHINE_TYPE="e2-standard-4"10export K8S_CLUSTER_0_CONTEXT_NAME="gke_${MDB_GKE_PROJECT}_${K8S_CLUSTER_0_ZONE}_${K8S_CLUSTER_0}"11
12export K8S_CLUSTER_1="k8s-mdb-1${K8S_CLUSTER_SUFFIX:-""}"13export K8S_CLUSTER_1_ZONE="europe-central2-b"14export K8S_CLUSTER_1_NUMBER_OF_NODES=315export K8S_CLUSTER_1_MACHINE_TYPE="e2-standard-4"16export K8S_CLUSTER_1_CONTEXT_NAME="gke_${MDB_GKE_PROJECT}_${K8S_CLUSTER_1_ZONE}_${K8S_CLUSTER_1}"17
18export K8S_CLUSTER_2="k8s-mdb-2${K8S_CLUSTER_SUFFIX:-""}"19export K8S_CLUSTER_2_ZONE="europe-central2-c"20export K8S_CLUSTER_2_NUMBER_OF_NODES=121export K8S_CLUSTER_2_MACHINE_TYPE="e2-standard-4"22export K8S_CLUSTER_2_CONTEXT_NAME="gke_${MDB_GKE_PROJECT}_${K8S_CLUSTER_2_ZONE}_${K8S_CLUSTER_2}"23
24# Preemptible nodes disabled — caused random mid-test evictions in CI.25# export GKE_SPOT_INSTANCES_SWITCH="--preemptible"

código fonte

Você pode encontrar todo o código-fonte incluído no repositório do MongoDB Kubernetes Operator.

Procedimento

Defina seu projeto gcloud padrão :

1gcloud config set project "${MDB_GKE_PROJECT}"

Criar clusters Kubernetes.

Criar três clusters GKE (Google Kubernetes Engine):

1gcloud container clusters create "${K8S_CLUSTER_0}" \2      --zone="${K8S_CLUSTER_0_ZONE}" \3      --num-nodes="${K8S_CLUSTER_0_NUMBER_OF_NODES}" \4      --machine-type "${K8S_CLUSTER_0_MACHINE_TYPE}" \5      --tags=mongodb \6      ${GKE_SPOT_INSTANCES_SWITCH:+${GKE_SPOT_INSTANCES_SWITCH}}

1gcloud container clusters create "${K8S_CLUSTER_1}" \2      --zone="${K8S_CLUSTER_1_ZONE}" \3      --num-nodes="${K8S_CLUSTER_1_NUMBER_OF_NODES}" \4      --machine-type "${K8S_CLUSTER_1_MACHINE_TYPE}" \5      --tags=mongodb \6      ${GKE_SPOT_INSTANCES_SWITCH:+${GKE_SPOT_INSTANCES_SWITCH}}

1gcloud container clusters create "${K8S_CLUSTER_2}" \2      --zone="${K8S_CLUSTER_2_ZONE}" \3      --num-nodes="${K8S_CLUSTER_2_NUMBER_OF_NODES}" \4      --machine-type "${K8S_CLUSTER_2_MACHINE_TYPE}" \5      --tags=mongodb \6      ${GKE_SPOT_INSTANCES_SWITCH:+${GKE_SPOT_INSTANCES_SWITCH}}

Armazene credenciais em seu kubeconfig.

Obtenha credenciais e salve contextos no arquivo kubeconfig atual. Por padrão, este arquivo está localizado no diretório ~/.kube/config e referenciado pela variável de ambiente $KUBECONFIG.

1gcloud container clusters get-credentials "${K8S_CLUSTER_0}" --zone="${K8S_CLUSTER_0_ZONE}"2gcloud container clusters get-credentials "${K8S_CLUSTER_1}" --zone="${K8S_CLUSTER_1_ZONE}"3gcloud container clusters get-credentials "${K8S_CLUSTER_2}" --zone="${K8S_CLUSTER_2_ZONE}"

Todos os comandos kubectl referenciam estes contextos utilizando as seguintes variáveis:

$K8S_CLUSTER_0_CONTEXT_NAME
$K8S_CLUSTER_1_CONTEXT_NAME
$K8S_CLUSTER_2_CONTEXT_NAME

Verifique se `kubectl` tem acesso aos clusters Kubernetes.

1echo "Nodes in cluster ${K8S_CLUSTER_0_CONTEXT_NAME}"2kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" get nodes3echo; echo "Nodes in cluster ${K8S_CLUSTER_1_CONTEXT_NAME}"4kubectl --context "${K8S_CLUSTER_1_CONTEXT_NAME}" get nodes5echo; echo "Nodes in cluster ${K8S_CLUSTER_2_CONTEXT_NAME}"6kubectl --context "${K8S_CLUSTER_2_CONTEXT_NAME}" get nodes

1Nodes in cluster gke_scratch-kubernetes-team_europe-central2-a_k8s-mdb-0-cabcbfd835d45fd33b2NAME                                                  STATUS   ROLES    AGE    VERSION3gke-k8s-mdb-0-cabcbfd835-default-pool-41737e6e-52hc   Ready    <none>   112s   v1.36.4-gke.13910024gke-k8s-mdb-0-cabcbfd835-default-pool-41737e6e-7pds   Ready    <none>   113s   v1.36.4-gke.13910025gke-k8s-mdb-0-cabcbfd835-default-pool-41737e6e-k76f   Ready    <none>   113s   v1.36.4-gke.13910026
7Nodes in cluster gke_scratch-kubernetes-team_europe-central2-b_k8s-mdb-1-cabcbfd835d45fd33b8NAME                                                  STATUS   ROLES    AGE   VERSION9gke-k8s-mdb-1-cabcbfd835-default-pool-a593e388-0m6k   Ready    <none>   36s   v1.36.4-gke.139100210gke-k8s-mdb-1-cabcbfd835-default-pool-a593e388-5zq5   Ready    <none>   32s   v1.36.4-gke.139100211gke-k8s-mdb-1-cabcbfd835-default-pool-a593e388-zppj   Ready    <none>   31s   v1.36.4-gke.139100212
13Nodes in cluster gke_scratch-kubernetes-team_europe-central2-c_k8s-mdb-2-cabcbfd835d45fd33b14NAME                                                  STATUS   ROLES    AGE   VERSION15gke-k8s-mdb-2-cabcbfd835-default-pool-4a9f72a1-hn1q   Ready    <none>   44s   v1.36.4-gke.1495002

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Arquitetura de vários clusters

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