environments for kubernetes

environments_for_k8s.txt

#!/usr/bin/bash

# Generate encryption key for EncryptionConfig
export ENCRYPTION_KEY=$(head -c 32 /dev/urandom | base64)

# Array of cluster machine IPs
export NODE_IPS=(192.168.31.80 192.168.31.81 192.168.31.82)

# Array of hostnames corresponding to cluster IPs
export NODE_NAMES=(k8s-master-01 k8s-slave-01 k8s-slave-02)

# List of etcd cluster service addresses
export ETCD_ENDPOINTS="https://192.168.31.80:2379,https://192.168.31.81:2379,https://192.168.31.82:2379"

# IPs and ports for etcd inter-cluster communication
export ETCD_NODES="k8s-master-01=https://192.168.31.80:2380,k8s-slave-01=https://192.168.31.81:2380,k8s-slave-02=https://192.168.31.82:2380"

# kube-apiserver reverse proxy (kube-nginx) address and port
export KUBE_APISERVER="https://127.0.0.1:8443"

# Name of the network interface for inter-node communication
export IFACE="eth0"

# etcd data directory
export ETCD_DATA_DIR="/data/k8s/etcd/data"

# etcd WAL directory (preferably an SSD partition, or a different partition from ETCD_DATA_DIR)
export ETCD_WAL_DIR="/data/k8s/etcd/wal"

# Data directory for Kubernetes components
export K8S_DIR="/data/k8s/k8s"

# Docker data directory
export DOCKER_DIR="/data/k8s/docker"

## The following parameters generally do not need to be modified

# Token used for TLS Bootstrapping (can be generated using: head -c 16 /dev/urandom | od -An -t x | tr -d ' ')
export BOOTSTRAP_TOKEN="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

# It's best to use a currently unused network segment for the service and pod network segments

# Service CIDR (not routable before deployment, routable within the cluster after deployment (guaranteed by kube-proxy))
export SERVICE_CIDR="10.96.0.0/12"

# Pod CIDR (recommended /16 segment, not routable before deployment, routable within the cluster after deployment (guaranteed by flanneld))
export CLUSTER_CIDR="10.244.0.0/16"

# Service port range (NodePort Range)
export NODE_PORT_RANGE="30000-32767"

# flanneld network configuration prefix
export FLANNEL_ETCD_PREFIX="/kubernetes/network"

# Kubernetes service IP (usually the first IP in SERVICE_CIDR)
export CLUSTER_KUBERNETES_SVC_IP="10.254.0.1"

# Cluster DNS service IP (pre-allocated from SERVICE_CIDR)
export CLUSTER_DNS_SVC_IP="10.254.0.2"

# Cluster DNS domain (without a trailing dot)
export CLUSTER_DNS_DOMAIN="cluster.local"

# Add the binary directory /opt/k8s/bin to PATH
export PATH=/opt/k8s/bin:$PATH