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kubeasz/tools/easzctl

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#!/bin/bash
#
# This script aims to manage k8s clusters created by 'kubeasz'. (developing)
set -o nounset
set -o errexit
#set -o xtrace
function usage() {
cat <<EOF
Usage: easzctl COMMAND [args]
Commands 1 (in-cluster opration):
add-node To add a kube-node(work node) to the k8s cluster
add-master To add a kube-master(master node) to the k8s cluster
add-etcd To add a etcd-node to the etcd cluster
del-etcd To delete a etcd-node from the etcd cluster
clean-node To clean a node, whatever role the node plays
Commands 2 (cluster-wide operation):
checkout To switch to cluster <clustername> context, or create it if not existed
destroy To destroy the current cluster, with '--purge' option to also delete the context
list To list all of clusters managed
setup To setup a cluster using the current context
Use "easzctl help <command>" for more information about a given command.
EOF
}
function help-info() {
case "$1" in
(add-node)
echo -e "Usage: easzctl add-node <new_node_ip>\n\nread 'https://github.com/gjmzj/kubeasz/blob/master/docs/op/AddNode.md'"
;;
(add-master)
echo -e "Usage: easzctl add-master <new_master_ip>\n\nread 'https://github.com/gjmzj/kubeasz/blob/master/docs/op/AddMaster.md'"
;;
(add-etcd)
echo -e "Usage: easzctl add-etcd <new_etcd_ip>\n\nread 'https://github.com/gjmzj/kubeasz/blob/master/docs/op/op-etcd.md'"
;;
(del-etcd)
echo -e "Usage: easzctl del-etcd <etcd_ip>\n\nread 'https://github.com/gjmzj/kubeasz/blob/master/docs/op/op-etcd.md'"
;;
(clean-node)
echo -e "Usage: easzctl clean-node <node_ip>\n\nread 'https://github.com/gjmzj/kubeasz/blob/master/docs/op/clean_one_node.md'"
;;
(*)
usage
return 0
;;
esac
}
function process_cmd() {
echo -e "+---\033[33m$ACTION\033[0m---+ : $CMD"
$CMD || { echo -e "+---\033[31mAction failed\033[0m---+ : $CMD"; return 1; }
echo -e "+---\033[32mAction successed\033[0m---+ : $CMD"
}
### in-cluster operation functions ##############################
function add-node() {
# check new node's address regexp
[[ $1 =~ ^(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})(\.(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})){3}$ ]] || { echo "ERROR: Invalid ip address!"; return 1; }
# check if the new node already exsited
sed -n '/^\[kube-master/,/^\[harbor/p' $BASEPATH/hosts|grep "^$1" && { echo "ERROR: node $1 already existed!"; return 2; }
# add a node into 'kube-node' group
sed -i "/\[kube-node/a $1 NEW_NODE=yes" $BASEPATH/hosts
# check if playbook runs successfully
ansible-playbook $BASEPATH/tools/20.addnode.yml -e NODE_TO_ADD=$1 || { sed -i "/$1 NEW_NODE=yes/d" $BASEPATH/hosts; return 2; }
}
function add-master() {
# check new master's address regexp
[[ $1 =~ ^(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})(\.(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})){3}$ ]] || { echo "ERROR: Invalid ip address!"; return 2; }
# check if k8s with DPLOY_MODE='multi-master'
grep '^DEPLOY_MODE=multi-master' $BASEPATH/hosts || { echo "ERROR: only k8s with DPLOY_MODE='multi-master' can have master node added!"; return 2; }
# check if the new master already exsited
sed -n '/^\[kube-master/,/^\[kube-node/p' $BASEPATH/hosts|grep "^$1" && { echo "ERROR: master $1 already existed!"; return 2; }
# add a node into 'kube-master' group
sed -i "/\[kube-master/a $1 NEW_MASTER=yes" $BASEPATH/hosts
# check if playbook runs successfully
ansible-playbook $BASEPATH/tools/21.addmaster.yml -e NODE_TO_ADD=$1 || { sed -i "/$1 NEW_MASTER=yes/d" $BASEPATH/hosts; return 2; }
}
function add-etcd() {
# check new node's address regexp
[[ $1 =~ ^(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})(\.(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})){3}$ ]] || { echo "ERROR: Invalid ip address!"; return 2; }
# check if the new node already exsited
sed -n '/^\[etcd/,/^\[kube-master/p' $BASEPATH/hosts|grep "^$1" && { echo "ERROR: node $1 already existed!"; return 2; }
# input an unique NODE_NAME of the node in etcd cluster
echo "Please input an UNIQUE name(string) for the new node: "
read NAME
sed -n '/^\[etcd/,/^\[kube-master/p' $BASEPATH/hosts|grep "$NAME" && { echo "ERROR: name [$NAME] already existed!"; return 2; }
# add a node into 'kube-node' group
sed -i "/\[etcd/a $1 NODE_NAME=$NAME" $BASEPATH/hosts
# check if playbook runs successfully
ansible-playbook $BASEPATH/tools/19.addetcd.yml -e NODE_TO_ADD=$1 || { sed -i "/$1 NODE_NAME=$NAME/d" $BASEPATH/hosts; return 2; }
}
function del-etcd() {
# check node's address regexp
[[ $1 =~ ^(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})(\.(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})){3}$ ]] || { echo "ERROR: Invalid ip address!"; return 2; }
#
ansible-playbook $BASEPATH/tools/remove_etcd_node.yml -e ETCD_TO_DEL=$1
}
function clean-node() {
# check node's address regexp
[[ $1 =~ ^(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})(\.(2(5[0-5]{1}|[0-4][0-9]{1})|[0-1]?[0-9]{1,2})){3}$ ]] || { echo "ERROR: Invalid ip address!"; return 2; }
#
ansible-playbook $BASEPATH/tools/clean_one_node.yml -e NODE_TO_DEL=$1
}
function start() {
case "$1" in
(aio)
start-aio
;;
(*)
return 0
;;
esac
}
function start-aio(){
[ -f "$BASEPATH/hosts" ] && { echo -e "ERROR: file $BASEPATH/hosts exists, checkout!\nRemove it if you really want to start an aio cluster"; return 3; }
if [ ! -n "$KUBEASZ_DOCKER_HOST" ]; then
# easzctl runs in a host machine, get host's ip
HOST_IF=$(ip route|grep default|cut -d' ' -f5)
HOST_IP=$(ip a|grep $HOST_IF|awk 'NR==2{print $2}'|cut -d'/' -f1)
cp -f $BASEPATH/example/hosts.allinone.example.en $BASEPATH/hosts
sed -i "s/192.168.1.1/$HOST_IP/g" $BASEPATH/hosts
ansible-playbook $BASEPATH/90.setup.yml
else
# easzctl runs in a container
cp -f $BASEPATH/example/hosts.allinone.example.en $BASEPATH/hosts
sed -i "s/192.168.1.1/$KUBEASZ_DOCKER_HOST/g" $BASEPATH/hosts
ansible-playbook $BASEPATH/90.setup.yml
fi
}
### cluster-wide operation functions ############################
function save_context() {
echo "[INFO] save $1 roles' configration"
for ROLE in $(ls $BASEPATH/roles);
do
if [ -d "$BASEPATH/roles/$ROLE/defaults" ]; then
mkdir -p $BASEPATH/.cluster/$1/roles/$ROLE/defaults/
cp -fpr $BASEPATH/roles/$ROLE/defaults/* $BASEPATH/.cluster/$1/roles/$ROLE/defaults/
fi
done
echo "[INFO] save $1 ansible hosts"
[ -f "$BASEPATH/hosts" ] && cp -fp $BASEPATH/hosts $BASEPATH/.cluster/$1/
echo "[INFO] save $1 kubeconfig"
[ -f /root/.kube/config ] && cp -fp /root/.kube/config $BASEPATH/.cluster/$1/
}
function install_context() {
[ -d "$BASEPATH/.cluster/$1" ] || { echo "Invalid Context"; return 1; }
echo "[INFO] install $1 roles' configration"
for ROLE in $(ls $BASEPATH/.cluster/$1/roles);
do
cp -fp $BASEPATH/.cluster/$1/roles/$ROLE/defaults/* $BASEPATH/roles/$ROLE/defaults/
done
echo "[INFO] install $1 ansible hosts"
if [ -f "$BASEPATH/.cluster/$1/hosts" ];then
cp -fp $BASEPATH/.cluster/$1/hosts $BASEPATH/
fi
echo "[INFO] install $1 kubeconfig"
if [ -f "$BASEPATH/.cluster/$1/config" ];then
cp -fp $BASEPATH/.cluster/$1/config /root/.kube/
fi
}
function checkout() {
# check directory '.cluster', initialize it if not existed
if [ ! -d "$BASEPATH/.cluster" ]; then
echo "[INFO] initialize directory $BASEPATH/.cluster"
mkdir -p $BASEPATH/.cluster/default
save_context default
echo default > $BASEPATH/.cluster/current_cluster
fi
# check if $1 is already the current context
CLUSTER=$(cat $BASEPATH/.cluster/current_cluster)
[ "$1" != "$CLUSTER" ] || { echo "[WARN] $1 is already the current context"; return 0; }
# save context of the current cluster
echo "[INFO] save current context: $CLUSTER"
save_context $CLUSTER
echo "[INFO] clean context: $CLUSTER"
rm -rf $BASEPATH/hosts /root/.kube/*
echo "[INFO] change current context to $1"
echo $1 > $BASEPATH/.cluster/current_cluster
# check context $1, install it if existed, otherwise initialize it using default context
if [ -d "$BASEPATH/.cluster/$1" ];then
install_context $1; return 0;
else
echo "[INFO] context $1 not existed, initialize it using default context"
cp -rp $BASEPATH/.cluster/default $BASEPATH/.cluster/$1
rm -f $BASEPATH/.cluster/$1/hosts $BASEPATH/.cluster/$1/config
fi
}
function setup() {
if [ ! -d "$BASEPATH/.cluster" ]; then
echo "[ERROR] no cluster context found, run 'easzctl checkout <cluster_name>' first."
return 1
fi
CLUSTER=$(cat $BASEPATH/.cluster/current_cluster)
echo "[INFO] setup cluster: $CLUSTER"
[ -f "$BASEPATH/bin/kube-apiserver" ] || { echo "[ERROR] no binaries found, download then fist"; return 1; }
[ -f "$BASEPATH/hosts" ] || { echo "[ERROR] no ansible hosts found, read 'docs/setup/00-planning_and_overall_intro.md'"; return 1; }
echo -e "[INFO] setup begin in 15s, press 'Enter' to stop it\n:"
! (read -t 10 ANS) || { echo "[WARN] setup aborted"; return 1; }
ansible-playbook $BASEPATH/90.setup.yml
echo "[INFO] save context: $CLUSTER"
save_context $CLUSTER
}
function list() {
CLUSTER=$(cat $BASEPATH/.cluster/current_cluster)
save_context $CLUSTER
i=1
for Cluster in $(ls $BASEPATH/.cluster/ |grep -v current_cluster);
do
KUBECONF=$BASEPATH/.cluster/$Cluster/config
if [ -f "$KUBECONF" ]; then
echo -e "\ncluster $i: $Cluster"
$BASEPATH/bin/kubectl --kubeconfig=$KUBECONF get node
fi
let "i++"
done
echo -e "\nCurrent cluster context is: $CLUSTER"
}
function destroy() {
CLUSTER=$(cat $BASEPATH/.cluster/current_cluster)
echo -e "[WARN] DELETE cluster: $CLUSTER, Continue? y/n:\n"
read -t 15 ANS || { echo "[WARN] timeout, destroy aborted"; return 1; }
if [[ -n $ANS && $ANS == y ]];then
echo "[INFO] clean all nodes of cluster"
sleep 5
ansible-playbook $BASEPATH/99.clean.yml
if [[ -n $1 && $1 == --purge ]];then
echo "[INFO] delete current context"
rm -rf $BASEPATH/.cluster/$CLUSTER
echo default > $BASEPATH/.cluster/current_cluster
rm -rf $BASEPATH/hosts /root/.kube/*
echo "[INFO] change current context to default"
install_context default
fi
else
echo "[WARN] destroy aborted"; return 1;
fi
}
### Main Lines ##################################################
BASEPATH=/etc/ansible
[ "$#" -gt 0 ] || { usage >&2; exit 2; }
case "$1" in
### in-cluster operations #####################
(add-node)
[ "$#" -gt 1 ] || { usage >&2; exit 2; }
ACTION="Action: add a k8s work node"
CMD="add-node $2"
;;
(add-master)
[ "$#" -gt 1 ] || { usage >&2; exit 2; }
ACTION="Action: add a k8s master node"
CMD="add-master $2"
;;
(add-etcd)
[ "$#" -gt 1 ] || { usage >&2; exit 2; }
ACTION="Action: add a etcd node"
CMD="add-etcd $2"
;;
(del-etcd)
[ "$#" -gt 1 ] || { usage >&2; exit 2; }
ACTION="Action: delete a etcd node"
CMD="del-etcd $2"
;;
(clean-node)
[ "$#" -gt 1 ] || { usage >&2; exit 2; }
ACTION="Action: clean a node"
CMD="clean-node $2"
;;
(start)
ACTION="Action: start an AllInOne cluster"
CMD="start $2"
;;
### cluster-wide operations #######################
(checkout)
[ "$#" -gt 1 ] || { usage >&2; exit 2; }
ACTION="Action: checkout cluster context"
CMD="checkout $2"
;;
(destroy)
ACTION="Action: destroy current cluster"
if [ "$#" -gt 1 ];then
CMD="destroy $2"
else
CMD="destroy"
fi
;;
(setup)
ACTION="Action: setup cluster with current context"
CMD="setup"
;;
(list)
ACTION="Action: list all of clusters managed"
CMD="list"
;;
(help)
[ "$#" -gt 1 ] || { usage >&2; exit 2; }
help-info $2
exit 0
;;
(*)
usage
exit 0
;;
esac
process_cmd
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