[2015-11월 정기 세미나]K8s on openstack
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This document discusses using plain Linux bridges for networking Docker containers on Kubernetes clusters deployed on OpenStack. It involves pre-allocating IP addresses on virtual machines, configuring Docker bridges to use the pre-allocated subnet, and allowing Kubernetes pods and containers to use the pre-allocated IP addresses for networking. The approach aims to provide a simple networking solution that is compatible with legacy systems.
![DOCKER NETWORK
cite-node-01:~$ docker network inspect bridge
[
{
"Name": "bridge",
"Id": "686c7352a697c038d642d2db95efadfc221c9e9044877b0f7a38756f5dc22e59"
"Scope": "local",
"Driver": "bridge",
"IPAM": {
"Driver": "default",
"Config": [
{
"Subnet": "172.16.128.0/23",
"IPRange": "172.16.128.128/28",
"AuxiliaryAddresses": {
"DefaultGatewayIPv4": "172.16.128.1"
}
}
]](https://image.slidesharecdn.com/k8sonopenstack-151127132857-lva1-app6891/85/2015-11-K8s-on-openstack-7-320.jpg)
[2015-11월 정기 세미나]K8s on openstack
- 6. NEUTRON INFO $ neutron port-list +-----+------+-------------------+----------------------------------------------- | id | name | mac_address | fixed_ips +-----+------+-------------------+----------------------------------------------- | XXX | cite | xx:xx:xx:xx:xx:xx | {"subnet_id": "...", "ip_address": "172.16.128 | | | | {"subnet_id": "...", "ip_address": "172.16.128 | | | | {"subnet_id": "...", "ip_address": "172.16.128 | | | | {"subnet_id": "...", "ip_address": "172.16.128 | | | | {"subnet_id": "...", "ip_address": "172.16.128 | | | | {"subnet_id": "...", "ip_address": "172.16.128 | | | | {"subnet_id": "...", "ip_address": "172.16.128 | | | | {"subnet_id": "...", "ip_address": "172.16.128 | | | | {"subnet_id": "...", "ip_address": "172.16.128 | | | | {"subnet_id": "...", "ip_address": "172.16.128 | | | | {"subnet_id": "...", "ip_address": "172.16.128 | | | | {"subnet_id": "...", "ip_address": "172.16.128 | | | | {"subnet_id": "...", "ip_address": "172.16.128 | | | | {"subnet_id": "...", "ip_address": "172.16.128
- 7. DOCKER NETWORK cite-node-01:~$ docker network inspect bridge [ { "Name": "bridge", "Id": "686c7352a697c038d642d2db95efadfc221c9e9044877b0f7a38756f5dc22e59" "Scope": "local", "Driver": "bridge", "IPAM": { "Driver": "default", "Config": [ { "Subnet": "172.16.128.0/23", "IPRange": "172.16.128.128/28", "AuxiliaryAddresses": { "DefaultGatewayIPv4": "172.16.128.1" } } ]
- 8. K8S POD $ kubectl get pod EXAMPLE -o yaml apiVersion: v1 kind: Pod metadata: ... spec: containers: ... status: ... hostIP: 172.16.217.246 phase: Running podIP: 172.16.128.132
- 9. CONTAINER INFO $ docker inspect 820ee00d9b3396572adb4c376bb5ff3a9d45c515e597267e1621401f6add297a [ { ... "NetworkSettings": { "Gateway": "172.16.128.1", "IPAddress": "172.16.128.132", "IPPrefixLen": 23, "IPv6Gateway": "", "MacAddress": "02:42:ac:10:80:84", "Networks": { "bridge": { "Gateway": "172.16.128.1", "IPAddress": "172.16.128.132", "IPPrefixLen": 23, "IPv6Gateway": "", "GlobalIPv6Address": "", "GlobalIPv6PrefixLen": 0,
- 10. DEMO
- 11. QUESTIONS?