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.sha seguir.
1 # GCP project name - this is the only parameter that is mandatory to change here 2 export MDB_GKE_PROJECT="${MDB_GKE_PROJECT:="### Set your GKE project name here ###"}" 3 4 # Adjust the values for each Kubernetes cluster in your deployment. 5 # The deployment script references the following variables to get values for each cluster. 6 export K8S_CLUSTER_0="k8s-mdb-0${K8S_CLUSTER_SUFFIX:-""}" 7 export K8S_CLUSTER_0_ZONE="europe-central2-a" 8 export K8S_CLUSTER_0_NUMBER_OF_NODES=3 9 export K8S_CLUSTER_0_MACHINE_TYPE="e2-standard-4" 10 export K8S_CLUSTER_0_CONTEXT_NAME="gke_${MDB_GKE_PROJECT}_${K8S_CLUSTER_0_ZONE}_${K8S_CLUSTER_0}" 11 12 export K8S_CLUSTER_1="k8s-mdb-1${K8S_CLUSTER_SUFFIX:-""}" 13 export K8S_CLUSTER_1_ZONE="europe-central2-b" 14 export K8S_CLUSTER_1_NUMBER_OF_NODES=3 15 export K8S_CLUSTER_1_MACHINE_TYPE="e2-standard-4" 16 export K8S_CLUSTER_1_CONTEXT_NAME="gke_${MDB_GKE_PROJECT}_${K8S_CLUSTER_1_ZONE}_${K8S_CLUSTER_1}" 17 18 export K8S_CLUSTER_2="k8s-mdb-2${K8S_CLUSTER_SUFFIX:-""}" 19 export K8S_CLUSTER_2_ZONE="europe-central2-c" 20 export K8S_CLUSTER_2_NUMBER_OF_NODES=1 21 export K8S_CLUSTER_2_MACHINE_TYPE="e2-standard-4" 22 export K8S_CLUSTER_2_CONTEXT_NAME="gke_${MDB_GKE_PROJECT}_${K8S_CLUSTER_2_ZONE}_${K8S_CLUSTER_2}" 23 24 # Preemptible nodes disabled — caused random mid-test evictions in CI. 25 # export GKE_SPOT_INSTANCES_SWITCH="--preemptible"
código fonte
Você pode encontrar todo o código-fonte incluído no repositório do MongoDB Kubernetes Operator.
Procedimento
Criar clusters Kubernetes.
Criar três clusters GKE (Google Kubernetes Engine):
1 gcloud container clusters create "${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}}
1 gcloud 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}}
1 gcloud 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 $KUBECONFIG.
1 gcloud container clusters get-credentials "${K8S_CLUSTER_0}" --zone="${K8S_CLUSTER_0_ZONE}" 2 gcloud container clusters get-credentials "${K8S_CLUSTER_1}" --zone="${K8S_CLUSTER_1_ZONE}" 3 gcloud container clusters get-credentials "${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.
1 echo "Nodes in cluster ${K8S_CLUSTER_0_CONTEXT_NAME}" 2 kubectl --context "${K8S_CLUSTER_0_CONTEXT_NAME}" get nodes 3 echo; echo "Nodes in cluster ${K8S_CLUSTER_1_CONTEXT_NAME}" 4 kubectl --context "${K8S_CLUSTER_1_CONTEXT_NAME}" get nodes 5 echo; echo "Nodes in cluster ${K8S_CLUSTER_2_CONTEXT_NAME}" 6 kubectl --context "${K8S_CLUSTER_2_CONTEXT_NAME}" get nodes
1 Nodes in cluster gke_scratch-kubernetes-team_europe-central2-a_k8s-mdb-0-6a44b344349x7481ab2-7157 2 NAME STATUS ROLES AGE VERSION 3 gke-k8s-mdb-0-6a44b34434-default-pool-7917e68f-b1ff Ready <none> 3m4s v1.35.5-gke.1163012 4 gke-k8s-mdb-0-6a44b34434-default-pool-7917e68f-qmrq Ready <none> 3m57s v1.35.5-gke.1163012 5 gke-k8s-mdb-0-6a44b34434-default-pool-7917e68f-zfs8 Ready <none> 2m28s v1.35.5-gke.1163012 6 7 Nodes in cluster gke_scratch-kubernetes-team_europe-central2-b_k8s-mdb-1-6a44b344349x7481ab2-7157 8 NAME STATUS ROLES AGE VERSION 9 gke-k8s-mdb-1-6a44b34434-default-pool-d60358e8-lkbk Ready <none> 2m46s v1.35.5-gke.1163012 10 gke-k8s-mdb-1-6a44b34434-default-pool-d60358e8-pxsf Ready <none> 2m46s v1.35.5-gke.1163012 11 gke-k8s-mdb-1-6a44b34434-default-pool-d60358e8-w3zn Ready <none> 2m48s v1.35.5-gke.1163012 12 13 Nodes in cluster gke_scratch-kubernetes-team_europe-central2-c_k8s-mdb-2-6a44b344349x7481ab2-7157 14 NAME STATUS ROLES AGE VERSION 15 gke-k8s-mdb-2-6a44b34434-default-pool-f32ffd04-6732 Ready <none> 33s v1.35.5-gke.1163012