Error when create a MicroK8s cluster : Connection failed. The hostname (xx) of the joining node does not resolve to the IP "xx". Refusing join (400)

ya chen

10/1/23, 9:37 AM

I have installed microk8s(1.24/stable) on two machines. The ip of the two machines are：172.29.99.187, 172.29.99.188. I operate the command at 172.29.99.187：microk8s add-node

Output:

From the node you wish to join to this cluster, run the following:
microk8s join 172.29.99.187:25000/57a191d07ce8fe360e13f4f1e9026ce8/5be428d4e916

Use the '--worker' flag to join a node as a worker not running the control plane, eg:
microk8s join 172.29.99.187:25000/57a191d07ce8fe360e13f4f1e9026ce8/5be428d4e916 --worker

If the node you are adding is not reachable through the default interface you can use one of the following:
microk8s join 172.29.99.187:25000/57a191d07ce8fe360e13f4f1e9026ce8/5be428d4e916
microk8s join 192.168.192.122:25000/57a191d07ce8fe360e13f4f1e9026ce8/5be428d4e916
microk8s join 172.24.0.1:25000/57a191d07ce8fe360e13f4f1e9026ce8/5be428d4e916
microk8s join 172.30.239.1:25000/57a191d07ce8fe360e13f4f1e9026ce8/5be428d4e916
microk8s join 172.17.0.1:25000/57a191d07ce8fe360e13f4f1e9026ce8/5be428d4e916

I operate the command at 172.29.99.188：

microk8s join 172.29.99.187:25000/57a191d07ce8fe360e13f4f1e9026ce8/5be428d4e916

Output:

Contacting cluster at 172.29.99.187
Connection failed. The hostname (cxsw) of the joining node does not resolve to the IP "172.29.99.188". Refusing join (400).

0 + 0

cluster

microk8s

Score:0

Server

ya chen

10/1/23, 11:18 AM

I found the solution on github：https://github.com/canonical/microk8s/issues/2967#issuecomment-1059942384

Edit /etc/hosts on the 172.29.99.188 machine,Add:

172.29.99.188 cxsw

0 + 0

Mysterio

10/11/22, 7:48 PM

Don't forget to add the same IP to the control plane node as well

edib

4/26/23, 10:19 AM

or hostnames must be somehow resolvable

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: Error when create a MicroK8s cluster : Connection failed. The hostname (xx) of the joining node does not resolve to the IP "xx". Refusing join (400)

TH: เกิดข้อผิดพลาดเมื่อสร้างคลัสเตอร์ MicroK8s: การเชื่อมต่อล้มเหลวชื่อโฮสต์ (xx) ของโหนดที่เข้าร่วมไม่ได้แก้ไขเป็น IP "xx" ปฏิเสธการเข้าร่วม (400)

RO: Eroare la crearea unui cluster MicroK8s: conexiune a eșuat.Numele de gazdă (xx) al nodului de alăturare nu se rezolvă la IP-ul „xx”. Refuz alăturarea (400)

RU: Ошибка при создании кластера MicroK8s: Ошибка подключения.Имя хоста (xx) присоединяющегося узла не преобразуется в IP-адрес «xx». Отказ присоединиться (400)

VI: Lỗi khi tạo cụm MicroK8s: Kết nối không thành công.Tên máy chủ (xx) của nút tham gia không phân giải thành IP "xx". Từ chối tham gia (400)

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.