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์Šค์™‘ ๋ฉ”๋ชจ๋ฆฌ ๋„๋Š” ์ด์œ 

- ์Šค์™‘ ๋ฉ”๋ชจ๋ฆฌ? : ๋ฉ”๋ชจ๋ฆฌ๊ฐ€ ๊ฐ€๋“์ฐจ๊ณ  ๋” ๋งŽ์€ ๋ฉ”๋ชจ๋ฆฌ ํ•„์š”ํ•  ๋•Œ, ํ•˜๋“œ๋””์Šคํฌ๋ฅผ ๋ฉ”๋ชจ๋ฆฌ์ฒ˜๋Ÿผ ์‚ฌ์šฉ (์†๋„ ๋А๋ฆผ) (๋””์Šคํฌ๋ฅผ ๊ฐ€์ƒ๋ฉ”๋ชจ๋ฆฌ)

์ด์ „ ๋ฆด๋ฆฌ์ฆˆ์—์„œ Kubernetes๋Š” Linux์—์„œ ์Šค์™‘ ๋ฉ”๋ชจ๋ฆฌ ์‚ฌ์šฉ์„ ์ง€์›ํ•˜์ง€ ์•Š์Œ. ์Šค์™‘์ด ๊ด€๋ จ๋  ๋•Œ ํฌ๋“œ ๋ฉ”๋ชจ๋ฆฌ ์‚ฌ์šฉ๋ฅ ์„ ๋ณด์žฅํ•˜๊ณ  ๊ณ ๋ คํ•˜๊ธฐ ์–ด๋ ต๊ธฐ ๋•Œ๋ฌธ์ž…๋‹ˆ๋‹ค. Kubernetes์˜ ์ด์ „ ์„ค๊ณ„์˜ ์ผ๋ถ€๋กœ, ์Šค์™‘ ์ง€์›์€ ๋ฒ”์œ„๋ฅผ ๋ฒ—์–ด๋‚œ ๊ฒƒ์œผ๋กœ ๊ฐ„์ฃผ๋˜์—ˆ์œผ๋ฉฐ, ๋…ธ๋“œ์—์„œ ์Šค์™‘์ด ๊ฐ์ง€๋˜๋ฉด ๊ธฐ๋ณธ์ ์œผ๋กœ ์ฟ ๋ธ”๋ ›์ด ์‹œ์ž‘๋˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค.

 

k8s 1.22 alpha version

๋…ธ๋“œ ์‹œ์Šคํ…œ ์Šค์™‘(swap) ์ง€์›

๋ชจ๋“  ์‹œ์Šคํ…œ ๊ด€๋ฆฌ์ž๋‚˜ ์ฟ ๋ฒ„๋„คํ‹ฐ์Šค ์‚ฌ์šฉ์ž๋Š” ์ฟ ๋ฒ„๋„คํ‹ฐ์Šค๋ฅผ ์„ค์ •ํ•˜๊ฑฐ๋‚˜ ์‚ฌ์šฉํ•  ๋•Œ ์Šค์™‘ ๊ณต๊ฐ„(space)์„ ๋น„ํ™œ์„ฑํ™”ํ•ด์•ผ ํ•œ๋‹ค๋Š” ๋™์ผํ•œ ์ƒํ™ฉ์— ๋†“์—ฌ ์žˆ์—ˆ์Šต๋‹ˆ๋‹ค. ์ฟ ๋ฒ„๋„คํ‹ฐ์Šค 1.22 ๋ฆด๋ฆฌ์Šค์—์„œ๋Š” ๋…ธ๋“œ์˜ ์Šค์™‘ ๋ฉ”๋ชจ๋ฆฌ๋ฅผ ์ง€์›ํ•ฉ๋‹ˆ๋‹ค(์•ŒํŒŒ). ์ด ๋ณ€๊ฒฝ์€ ๋ธ”๋ก ์Šคํ† ๋ฆฌ์ง€์˜ ์ผ๋ถ€๋ฅผ ์ถ”๊ฐ€์ ์ธ ๊ฐ€์ƒ ๋ฉ”๋ชจ๋ฆฌ๋กœ ์ทจ๊ธ‰ํ•˜๋„๋ก, ๊ด€๋ฆฌ์ž์˜ ์˜ตํŠธ์ธ(opt in)์„ ๋ฐ›์•„์„œ ๋ฆฌ๋ˆ…์Šค ๋…ธ๋“œ์— ์Šค์™‘์„ ๊ตฌ์„ฑํ•ฉ๋‹ˆ๋‹ค

https://kubernetes.io/blog/2021/08/09/run-nodes-with-swap-alpha/

 

New in Kubernetes v1.22: alpha support for using swap memory

Author: Elana Hashman (Red Hat) The 1.22 release introduced alpha support for configuring swap memory usage for Kubernetes workloads on a per-node basis. In prior releases, Kubernetes did not support the use of swap memory on Linux, as it is difficult to p

kubernetes.io

 

 

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k8s cluster ๊ตฌ์„ฑ ์ „, ์„ธํŒ…ํ•ด์•ผํ•˜๋Š” ๊ฒƒ๋“ค์ด ์žˆ๋‹ค.

1. /etc/hosts ์ˆ˜์ • (ํด๋Ÿฌ์Šคํ„ฐ๋กœ ์“ธ ์„œ๋ฒ„ IP, hostname)

2. swap memory ๋„๊ธฐ swapoff -a

3. setenforce 0 > getenforce Permissive ํ™•์ธ

4. docker engine ์„ค์น˜

5. kubectl, kubeadm, kubelet ์„ค์น˜

 

docker engine ์„ค์น˜

 sudo yum install -y yum-utils
 sudo yum-config-manager \
    --add-repo \
    https://download.docker.com/linux/centos/docker-ce.repo
 sudo yum clean all
 sudo yum repolist
 sudo yum install docker-ce docker-ce-cli containerd.io
 systemctl start docker

 

k8s ์„ค์น˜

vi /etc/yum.reposd/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
exclude=kubelet kubeadm kubectl

yum clean all
yum repolist
yum install kubelet kubeadm kubectl -y
sudo mkdir /etc/docker
cat <<EOF | sudo tee /etc/docker/daemon.json
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2"
}
EOF
sudo systemctl enable docker
sudo systemctl daemon-reload
sudo systemctl restart docker

sudo systemctl restart kubelet

kubeadm init --pod-network-cidr=20.96.0.0/12 --apiserver-advertise-address=ip_address --v=5 --ignore-preflight-errors=NumCPU

Worker Node - Contrl Plane Node์— Join 

kubeadm join masterIP:6443 --token ~~~~~~`~~~ \
        --discovery-token-ca-cert-hash sha256:~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ --v=5 \
        --ignore-preflight-errors=NumCPU
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Docker ํ™˜๊ฒฝ - Linux centos version

 

Docker๋ฅผ ์‹œ์ž‘ํ•˜๊ธฐ ์ „์—

https://www.redhat.com/ko/topics/containers/what-is-docker

 

Docker(๋„์ปค)๋ž€? ๋„์ปค ์ปจํ…Œ์ด๋„ˆ ์‹คํ–‰, ์‚ฌ์šฉ๋ฒ•, ๋‹ค์šด๋กœ๋“œ, ๋ฐฐํฌ

Docker(๋„์ปค)๋ž€ Linux(๋ฆฌ๋ˆ…์Šค) ์ปจํ…Œ์ด๋„ˆ ์ƒ์„ฑ ๋ฐ ์‚ฌ์šฉ์„ ๋•๋Š” ์ปจํ…Œ์ด๋„ˆ ๊ธฐ์ˆ ์„ ๋œปํ•ฉ๋‹ˆ๋‹ค. Docker ์‚ฌ์šฉ๋ฒ•, Docker container(๋„์ปค ์ปจํ…Œ์ด๋„ˆ), ๋‹ค์šด๋กœ๋“œ ๋ฐฉ๋ฒ•์„ ์„ค๋ช…ํ•ฉ๋‹ˆ๋‹ค.

www.redhat.com

ํด๋ผ์šฐ๋“œ๋ž€?

 

Docker๋ž€?

https://docs.docker.com/engine/

 

Docker Engine overview

 

docs.docker.com

 

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'๋ฏธ์‚ฌ์šฉ > ์ฟ ๋ฒ„๋„คํ‹ฐ์Šค์™€ ๋„์ปค' ์นดํ…Œ๊ณ ๋ฆฌ์˜ ๋‹ค๋ฅธ ๊ธ€

[k8s] k8s swap memory  (0) 2022.04.27
[k8s] kubernetes ์„ค์น˜ ๊ฐ€์ด๋“œ  (0) 2022.04.22

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