8. flannel 部署

21 22

下载地址：https://github.com/coreos/flannel/releases

src]# wget https://github.com/coreos/flannel/releases/download/v0.11.0/flannel-v0.11.0-linux-amd64.tar.gz

src]# mkdir /opt/flannel-v0.11.0

src]# tar xf flannel-v0.11.0-linux-amd64.tar.gz -C /opt/flannel-v0.11.0/

src]# ln -s /opt/flannel-v0.11.0/ /opt/flannel

flannel]# mkdir certs

cert]# scp hdss7-200:/opt/certs/ca.pem . 

cert]# scp hdss7-200:/opt/certs/client.pem .

cert]# scp hdss7-200:/opt/certs/client-key.pem .

flannel]# vi subnet.env

FLANNEL_NETWORK=172.7.0.0/16
FLANNEL_SUBNET=172.7.21.1/24
FLANNEL_MTU=1500
FLANNEL_IPMASQ=false

flannel]# vi flanneld.sh 


#!/bin/sh
./flanneld \
  --public-ip=172.16.20.21 \
  --etcd-endpoints=https://172.16.20.12:2379,https://172.16.20.21:2379,https://172.16.20.22:2379 \
  --etcd-keyfile=./certs/client-key.pem \
  --etcd-certfile=./certs/client.pem \
  --etcd-cafile=./certs/ca.pem \
  --iface=een192 \
  --subnet-file=./subnet.env \
  --healthz-port=2401
  
mkdir -p /data/logs/flanneld

etcd]# ./etcdctl set /coreos.com/network/config '{"Network": "172.7.0.0/16", "Backend": {"Type": "host-gw"}}'

~]# vi /etc/supervisord.d/flannel.ini


[program:flanneld-7-21]
command=/opt/flannel/flanneld.sh                             ; the program (relative uses PATH, can take args)
numprocs=1                                                   ; number of processes copies to start (def 1)
directory=/opt/flannel                                       ; directory to cwd to before exec (def no cwd)
autostart=true                                               ; start at supervisord start (default: true)
autorestart=true                                             ; retstart at unexpected quit (default: true)
startsecs=30                                                 ; number of secs prog must stay running (def. 1)
startretries=3                                               ; max # of serial start failures (default 3)
exitcodes=0,2                                                ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT                                              ; signal used to kill process (default TERM)
stopwaitsecs=10                                              ; max num secs to wait b4 SIGKILL (default 10)
user=root                                                    ; setuid to this UNIX account to run the program
redirect_stderr=true                                         ; redirect proc stderr to stdout (default false)
stdout_logfile=/data/logs/flanneld/flanneld.stdout.log       ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB                                 ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4                                     ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB                                  ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false                                  ; emit events on stdout writes (default false)

chmod u+x /opt/flannel/flanneld.sh

'{"Network": "172.7.0.0/16", "Backend": {"Type": "VxLAN"}}'

'{"Network": "172.7.0.0/16", "Backend": {"Type": "VxLAN","Directrouting": true}}'

~]# yum install iptables-services -y

~]# iptables -t nat -D POSTROUTING -s 172.7.21.0/24 ! -o docker0 -j MASQUERADE

~]# iptables -t nat -I POSTROUTING -s 172.7.21.0/24 ! -d 172.7.0.0/16 ! -o docker0 -j MASQUERADE

~]# iptables-save |grep -i postrouting

~]# iptables-save > /etc/sysconfig/iptables