Prequisites).
In thie blog post, I will show how to provision k8s 1.17 with vagrant and some shell scripts.
Ubuntu18.04,vagrant and kvm environment.
*First of all, we should install vagrant and libvirt plugin.
oyj@controller:~$ vagrant plugin list
==> vagrant: A new version of Vagrant is available: 2.2.6 (installed version: 2.2.5)!
==> vagrant: To upgrade visit: https://www.vagrantup.com/downloads.html
vagrant-libvirt (0.0.45, global)
#If we did not install libvirt plugin, install like below.
oyj@controller:~$ vagrant plugin install libvirt
Installing the 'libvirt' plugin. This can take a few minutes...
*Second of all, we should clone git repo that I created recently.
oyj@controller:~$ git clone https://github.com/ohyoungjooung2/u18kvk8s.git
Cloning into 'u18kvk8s'...
remote: Enumerating objects: 216, done.
remote: Counting objects: 100% (216/216), done.
remote: Compressing objects: 100% (173/173), done.
remote: Total 216 (delta 36), reused 207 (delta 32), pack-reused 0
Receiving objects: 100% (216/216), 894.49 KiB | 942.00 KiB/s, done.
Resolving deltas: 100% (36/36), done.
*Lastly, just execute setup.sh.
oyj@controller:~$ cd u18kvk8s/k8s/
ooyj@controller:~/u18kvk8s/k8s$ bash setup.sh
Deleting previous id_rsa
Generating ssh key for provisionng automatic
copy id_rsa.put to pub_key
up master first
Bringing machine 'kubemaster' up with 'libvirt' provider...
==> kubemaster: Checking if box 'centos/7' version '1905.1' is up to date...
==> kubemaster: Creating image (snapshot of base box volume).
==> kubemaster: Creating domain with the following settings...
==> kubemaster: -- Name: k8s_kubemaster
==> kubemaster: -- Domain type: kvm
==> kubemaster: -- Cpus: 2
==> kubemaster: -- Feature: acpi
==> kubemaster: -- Feature: apic
==> kubemaster: -- Feature: pae
==> kubemaster: -- Memory: 2048M
==> kubemaster: -- Management MAC:
==> kubemaster: -- Loader:
==> kubemaster: -- Nvram:
==> kubemaster: -- Base box: centos/7
==> kubemaster: -- Storage pool: default
==> kubemaster: -- Image: /var/lib/libvirt/images/k8s_kubemaster.img (41G)
==> kubemaster: -- Volume Cache: default
==> kubemaster: -- Kernel:
==> kubemaster: -- Initrd:
==> kubemaster: -- Graphics Type: vnc
==> kubemaster: -- Graphics Port: -1
==> kubemaster: -- Graphics IP: 127.0.0.1
==> kubemaster: -- Graphics Password: Not defined
==> kubemaster: -- Video Type: cirrus
==> kubemaster: -- Video VRAM: 9216
==> kubemaster: -- Sound Type:
==> kubemaster: -- Keymap: en-us
==> kubemaster: -- TPM Path:
==> kubemaster: -- INPUT: type=mouse, bus=ps2
==> kubemaster: Creating shared folders metadata...
==> kubemaster: Starting domain.
==> kubemaster: Waiting for domain to get an IP address...
==> kubemaster: Waiting for SSH to become available...
kubemaster:
===============omitted..too long ====================
Password authentication is disabled to avoid man-in-the-middle attacks.
Keyboard-interactive authentication is disabled to avoid man-in-the-middle attacks.
admin_init.log 100% 4605 7.0MB/s 00:00
scp admin_inig.log success
Wait until kubemaster ready to accept nodes to join
kubeworker2: Warning: Permanently added '10.1.0.2' (ECDSA) to the list of known hosts.
kubeworker2: Node will join with master 10.1.0.2
kubeworker2: [preflight] Running pre-flight checks
kubeworker2: W1228 11:31:10.356519 6787 join.go:346] [preflight] WARNING: JoinControlPane.controlPlane settings will be ignored when control-plane flag is not set.
kubeworker2: [preflight] Reading configuration from the cluster...
kubeworker2: [preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -oyaml'
kubeworker2: [kubelet-start] Downloading configuration for the kubelet from the "kubelet-config-1.17" ConfigMap in the kube-system namespace
kubeworker2: [kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
kubeworker2: [kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
kubeworker2: [kubelet-start] Starting the kubelet
kubeworker2: [kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...
kubeworker2:
kubeworker2: This node has joined the cluster:
kubeworker2: * Certificate signing request was sent to apiserver and a response was received.
kubeworker2: * The Kubelet was informed of the new secure connection details.
kubeworker2:
kubeworker2: Run 'kubectl get nodes' on the control-plane to see this node join the cluster.
* And we can check by logging in kubemaster node.
oyj@controller:~/u18kvk8s/k8s$ vagrant ssh kubemaster
Last login: Sat Dec 28 11:20:50 2019
[vagrant@kubemaster ~]$ kubectl get nodes
NAME STATUS ROLES AGE VERSION
kubemaster Ready master 14m v1.17.0
kubeworker1 Ready <none> 5m34s v1.17.0
kubeworker2 Ready <none> 2m48s v1.17.0
Conclusion).
To sum up, we can create k8s environment with vagrant and some shell scripts. Easy!..^^.
Thanks for reading.
