rengokantai/pkk8scok2ed

pkk8scok

Chapter1: Building Your Own Kubernetes

kube-apiserver, kube-scheduler and kube-controller-manager

Command-line interface

kubectl get cs

install etcd
u15

apt install etcd
service stop etcd
etcd -name ke --data-dir /tmp.ke.etcd &

use another machine, connect

etcdctl set ke "ke"
etcd get ke

use curl

curl -L http://localhost:2379/v2/keys/ke

put/update

curl http://localhost:2379/v2/keys/ke -X PUT -d value="ke2"

delete

curl http://localhost:2379/v2/keys/ke?recursive=true -X DELETE

note, an key could be multiple lavel,like

/ke/ke1/ke2

the above delete recursive=true still apply

######enalbe startup service in c7,u15+,use systemd-based

vim /lib/systemd/system/etcd.service

point to

systemctl enable etcd

create /etc/etcd/etcd.conf

cd /etc
mkdir etcd
cd etcd && vim etcd.conf

edit

export ETCD_NAME=ke
export ETCD_DATA_DIR="/tmp/ke.etcd"
export ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0/8080"
export ETCD_ADVERTISE_CLIENT_URLS="http://localhost:8080"

#####install flannel on u16

apt-get install linux-libc-dev golang gcc -y

vim ke.json

edit

{
"Network":"10.136.0.0/16",
"SubnetLen":28
"SubnetMin":"10.136.16.0",
"SubnetMax":"10.136.99.0",
"Backend":{
        "Type":"udp",
        "Port":7890
}
}

then create service file in system

vim /lib/systemd/system/flanneld.service

edit

[Unit]
Description=Flannel
Wants=etcd.service
After=etcd.service
Before=docker.service

[Service]
Type=Notify

EnvironmentFile=/etc/sysconfig/flanneld
EnvironmentFile=-/etc/sysconfig/docker-network
ExecStart=/usr/bin/flanneld -etcd-endpoints=${FLANNEL_ETCD} -etcd-prefix=${FLANN
EL_ETCD_KEY} $FLANNEL_OPTIONS
Restart=on-failure

RestartSec=5s

[Install]
WantedBy=multi-user.target

then create flanneld:

cd /etc && mkdir sysconfig && cd sysconfig && vim flanneld

FLANNEL_ETCD="http://localhost:2379" FLANNEL_ETCD_KEY="/coreos.com/network"