Kubernetes the hard way lab setup
Материал из noname.com.ua
Настойка лаборатории для K8s
Касается всех нод
- Hardware: RaspberryPi 4, 8GB
- OS: Ubuntu 22.04
- Установка: https://ubuntu.com/tutorials/how-to-install-ubuntu-on-your-raspberry-pi#1-overview (можно не читать - ничего особенного, похоже на любой другой дистрибутив на microsd для raspberry)
Пакеты
apt -y install mc apt -y install iw apt -y install i2c-tools apt -y install python3-smbus python3-netifaces python3-willow apt -y install python3-rpi.gpio apt -y install net-tools apt -y install frr
Консоль
HISTSIZE=100000000 HISTFILESIZE=20000000 HISTTIMEFORMAT="%d/%m/%y %T "
alias date='date -R ' alias ll='ls -lsa'
Ядро
uname -a Linux master-az3 5.15.0-1014-raspi #16-Ubuntu SMP PREEMPT Thu Aug 25 09:50:55 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux
Температура и управление вентилятором
В моем случае ноды питаются от Poe HAT, с дополнительным экраном и охлаждением - для управления этой платой есть отдельный проект
- https://github.com/sirmax123/waveshare_poe_hat
- systemctl enable poe-hat-screen.service
unattended-upgrades
dpkg-reconfigure unattended-upgrades
nano /etc/apt/apt.conf.d/20auto-upgrades APT::Periodic::Download-Upgradeable-Packages "0"; APT::Periodic::AutocleanInterval "0"; APT::Periodic::Update-Package-Lists "0"; APT::Periodic::Unattended-Upgrade "0";
Схема сети
+--------------+ +---------------------
| Master 1 eth0 | Catalyst 3560G
| | |
| eth0.101 -- 10.0.11.1/30------VLAN101---10.0.11.2/30 ---+
wifi0-+ | |
| eth0.102 -- 10.0.12.1/30------VLAN102---10.0.12.2/30 ---+ Gi 0/43
| | |
| eth0.103 -- 10.0.13.1/30------VLAN101---10.0.13.2/30 ---+
| | |
| | |
+--------------+ |
|
+--------------+ |
| Master 2 eth0 |
| | |
| eth0.201 -- 10.0.21.1/30------VLAN201---10.0.21.2/30 ---+
wifi0-+ | |
| eth0.202 -- 10.0.22.1/30------VLAN202---10.0.22.2/30 ---+ Gi 0/44
| | |
| eth0.203 -- 10.0.23.1/30------VLAN201---10.0.23.2/30 ---+
| | |
| | |
+--------------+ |
|
+--------------+ |
| Master 3 eth0 |
| | |
| eth0.301 -- 10.0.31.1/30------VLAN301---10.0.31.2/30 ---+
wifi0-+ | |
| eth0.302 -- 10.0.32.1/30------VLAN302---10.0.32.2/30 ---+ Gi 0/45
| | |
| eth0.303 -- 10.0.33.1/30------VLAN301---10.0.33.2/30 ---+
| | |
| | |
+--------------+ +---------------------
WiFi0 используется исключительно для настройки, в процессе работы никакой траффик через него ходить не будет
- В номерах VLAN для каждой ноды используется номер ноды что бы проще было запомнить
- Vlan 101, 201, 301 - используется для etcd
Master Nodes
- Три ноды которые будут играть роль как master так и worker нод
- Для лучшего понимания для каждого отдельного сервиса будет назначена своя сеть
master1
network:
ethernets:
eth0:
dhcp4: false
optional: true
version: 2
wifis:
wlan0:
access-points:
ssid-name:
password: access-point-password
dhcp4: true
optional: true
vlans:
eth0.101:
id: 101
link: eth0
addresses: [ "10.0.11.1/30"]
eth0.102:
id: 102
link: eth0
addresses: [ "10.0.12.1/30"]
eth0.103:
id: 103
link: eth0
addresses: [ "10.0.13.1/30"]
frr version 8.1 frr defaults traditional hostname master-az1 log syslog informational no ipv6 forwarding service integrated-vtysh-config ! ip route 10.0.21.0/30 10.0.11.2 ip route 10.0.22.0/30 10.0.12.2 ip route 10.0.23.0/30 10.0.13.2 ip route 10.0.31.0/30 10.0.11.2 ip route 10.0.32.0/30 10.0.12.2 ip route 10.0.33.0/30 10.0.13.2 ! end
master2
network:
ethernets:
eth0:
dhcp4: true
optional: true
version: 2
wifis:
wlan0:
access-points:
ssid-name:
password: access-point-password
dhcp4: true
optional: true
vlans:
eth0.201:
id: 201
link: eth0
addresses: [ "10.0.21.1/30"]
eth0.202:
id: 202
link: eth0
addresses: [ "10.0.22.1/30"]
eth0.203:
id: 203
link: eth0
addresses: [ "10.0.23.1/30"]
frr version 8.1 frr defaults traditional hostname master-az2 log syslog informational no ipv6 forwarding service integrated-vtysh-config ! ip route 10.0.11.0/30 10.0.21.2 ip route 10.0.12.0/30 10.0.22.2 ip route 10.0.13.0/30 10.0.23.2 ip route 10.0.31.0/30 10.0.21.2 ip route 10.0.32.0/30 10.0.22.2 ip route 10.0.33.0/30 10.0.23.2 ! end
master3
network:
ethernets:
eth0:
dhcp4: true
optional: true
version: 2
wifis:
wlan0:
access-points:
ssid-name:
password: access-point-password
dhcp4: true
optional: true
vlans:
eth0.301:
id: 301
link: eth0
addresses: [ "10.0.31.1/30"]
eth0.302:
id: 302
link: eth0
addresses: [ "10.0.32.1/30"]
eth0.303:
id: 303
link: eth0
addresses: [ "10.0.33.1/30"]
frr version 8.1 frr defaults traditional hostname master-az3 log syslog informational no ipv6 forwarding service integrated-vtysh-config ! ip route 10.0.11.0/30 10.0.31.2 ip route 10.0.12.0/30 10.0.32.2 ip route 10.0.13.0/30 10.0.33.2 ip route 10.0.21.0/30 10.0.31.2 ip route 10.0.22.0/30 10.0.32.2 ip route 10.0.23.0/30 10.0.33.2 ! end
Worker Nodes
Catalyst 3550G
vlan 101 name etcd-az1-k8s-cluster0-home mtu 9000 exit ! vlan 201 name etcd-az2-k8s-cluster0-home mtu 9000 exit ! vlan 301 name etcd-az3-k8s-cluster0-home mtu 9000 exit ! vlan 102 mtu 9000 ! vlan 202 mtu 9000 ! vlan 302 mtu 9000 ! vlan 103 mtu 9000 ! vlan 203 mtu 9000 ! vlan 303 mtu 9000 ! vrf definition k8s-cluster0 description Cluster 0 rd 65532:101010 no interface Vlan101 interface Vlan101 description master-az1-etcd vrf forwarding k8s-cluster0 ip address 10.0.11.2 255.255.255.252 exit ! no interface Vlan102 interface Vlan102 vrf forwarding k8s-cluster0 ip address 10.0.12.2 255.255.255.252 exit no interface Vlan103 interface Vlan103 vrf forwarding k8s-cluster0 ip address 10.0.13.2 255.255.255.252 exit ! ! no interface Vlan201! interface Vlan201 description master-az2-etcd vrf forwarding k8s-cluster0 ip address 10.0.21.2 255.255.255.252 exit ! no interface Vlan202 interface Vlan202 vrf forwarding k8s-cluster0 ip address 10.0.22.2 255.255.255.252 exit ! no interface Vlan203 interface Vlan203 vrf forwarding k8s-cluster0 ip address 10.0.23.2 255.255.255.252 exit ! ! ! ! no interface Vlan301 interface Vlan301 description master-az2-etcd vrf forwarding k8s-cluster0 ip address 10.0.31.2 255.255.255.252 exit ! no interface Vlan302 interface Vlan302 vrf forwarding k8s-cluster0 ip address 10.0.32.2 255.255.255.252 exit ! no interface Vlan303 interface Vlan303 vrf forwarding k8s-cluster0 ip address 10.0.33.2 255.255.255.252 exit ! ! ! ! Current configuration : 247 bytes ! interface GigabitEthernet0/43 description master-az1.k8s.cluster0.home switchport trunk encapsulation dot1q switchport trunk native vlan 2003 switchport trunk allowed vlan 101-103 switchport mode trunk spanning-tree bpdufilter enable exit ! interface GigabitEthernet0/44 description master-az2.k8s.cluster0.home switchport access vlan 2002 switchport trunk encapsulation dot1q switchport trunk native vlan 2002 switchport trunk allowed vlan 201-203 switchport mode trunk spanning-tree bpdufilter enable exit ! interface GigabitEthernet0/45 description master-az3.k8s.cluster0.home switchport access vlan 2001 switchport trunk encapsulation dot1q switchport trunk native vlan 2001 switchport trunk allowed vlan 301-303 switchport mode trunk spanning-tree bpdufilter enable exit
