おうちKubernetesクラスターの観察

はじめに
参考
内容
おわりに

はじめに

おうちKubernetesクラスターの観察です。

参考

「Kubernetes → CNI → Linux ネットワーク」のつながりを実感するためのコマンド例 #Ubuntu – Qiita

「Kubernetes → CNI → Linux ネットワーク」のつながりを実感するためのコマンド例 - Qiita

はじめに本記事の想定読者です：Linux のネットワーク設定について ip link, ip addr, ip route, ip netns 等のコマンドを使うことは知っているKuberne…

内容

クラスタを構成する各マシンのIPアドレス

tunl0が存在している。

k8s1

IPv4 address for eth0:  192.168.1.201
IPv6 address for eth0:  240d:1a:1d8:a600:dea6:32ff:fef1:4d1f
IPv4 address for tunl0: 172.16.166.192
IPv4 address for wlan0: 192.168.68.111

k8s2

IPv4 address for eth0:  192.168.1.202
IPv6 address for eth0:  240d:1a:1d8:a600:dea6:32ff:fef1:347e
IPv4 address for tunl0: 172.16.109.64
IPv4 address for wlan0: 192.168.68.107

k8s3

IPv4 address for eth0:  192.168.1.203
IPv6 address for eth0:  240d:1a:1d8:a600:dea6:32ff:fef1:3397
IPv4 address for tunl0: 172.16.219.0
IPv4 address for wlan0: 192.168.68.113

ip link

k8s1

wurly@k8s1:~$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether dc:a6:32:f1:4d:1f brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DORMANT group default qlen 1000
    link/ether dc:a6:32:f1:4d:20 brd ff:ff:ff:ff:ff:ff
4: cali2d67c50ecdd@if3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1480 qdisc noqueue state UP mode DEFAULT group default 
    link/ether ee:ee:ee:ee:ee:ee brd ff:ff:ff:ff:ff:ff link-netns cni-afa93372-5be3-2dee-223f-959d89af1ab5
5: cali5b7b022879c@if3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1480 qdisc noqueue state UP mode DEFAULT group default 
    link/ether ee:ee:ee:ee:ee:ee brd ff:ff:ff:ff:ff:ff link-netns cni-01b7b370-55bb-7055-172c-1f5555bf9007
6: cali3dc86b53b34@if3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1480 qdisc noqueue state UP mode DEFAULT group default 
    link/ether ee:ee:ee:ee:ee:ee brd ff:ff:ff:ff:ff:ff link-netns cni-22fd9ba8-21b6-302b-7acd-9323dd0153a6
7: tunl0@NONE: <NOARP,UP,LOWER_UP> mtu 1480 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/ipip 0.0.0.0 brd 0.0.0.0

k8s2

wurly@k8s2:~$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether dc:a6:32:f1:34:7e brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DORMANT group default qlen 1000
    link/ether dc:a6:32:f1:34:7f brd ff:ff:ff:ff:ff:ff
4: tunl0@NONE: <NOARP,UP,LOWER_UP> mtu 1480 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/ipip 0.0.0.0 brd 0.0.0.0

k8s3

wurly@k8s3:~$ ip link
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether dc:a6:32:f1:33:97 brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP mode DORMANT group default qlen 1000
    link/ether dc:a6:32:f1:33:9a brd ff:ff:ff:ff:ff:ff
4: tunl0@NONE: <NOARP,UP,LOWER_UP> mtu 1480 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/ipip 0.0.0.0 brd 0.0.0.0

ip netns list

k8s1

wurly@k8s1:~$ ip netns list
cni-01b7b370-55bb-7055-172c-1f5555bf9007 (id: 1)
cni-22fd9ba8-21b6-302b-7acd-9323dd0153a6 (id: 2)
cni-afa93372-5be3-2dee-223f-959d89af1ab5 (id: 0)

k8s2

wurly@k8s2:~$ ip netns list

k8s3

wurly@k8s3:~$ ip netns list

おわりに

以上です。