1. Kubernetes
가상머신 스펙
- 이미지 : Ubuntu
- 램 : 4 GB
- 코어 : 2
- 프로세서 : 2
- ssh 연결을 위해 계정 업데이트 필요
- 만든 가상머신을 full clone 하여 master VM, worker1, worker2 생성 (ubuntu 기반)
- 호스트 네임 변경
hostnamectl set-hostname <변경할 호스트 네임>
vi /etc/netplan/00-installer-config.yml
master : 211.183.3.100
hostname : master
worker1 : 211.183.3.110
hostname : worker1
worker2 : 211.183.3.120
hostname : worker2
모든 노드에 명령어 입력
각 노드에 도커 설치
도커 재시작 및 실행(enable)
CRI 도커 플러그인 설치
docker를 CRI(Container Runtime Interface)로 사용하기 위해 docker를 설치(현재 k8s는 공식적으로 docker를 지원하지 않기때문에 cri-dockerd 설치가 필요.)
1.14 미만의 k8s를 설치하는것도 한가지 방법이다.
git clone https://github.com/Mirantis/cri-dockerd.git
wget https://storage.googleapis.com/golang/getgo/installer_linux
chmod +x ./installer_linux
./installer_linux
source ~/.bash_profile
cd cri-dockerd
mkdir bin
go build -o bin/cri-dockerd
mkdir -p /usr/local/bin
install -o root -g root -m 0755 bin/cri-dockerd /usr/local/bin/cri-dockerd
cp -a packaging/systemd/* /etc/systemd/system
sed -i -e 's,/usr/bin/cri-dockerd,/usr/local/bin/cri-dockerd,' /etc/systemd/system/cri-docker.service
systemctl daemon-reload
systemctl enable cri-docker.service
systemctl enable --now cri-docker.socket
sudo systemctl restart docker && sudo systemctl restart cri-docker
sudo systemctl status cri-docker.socket --no-pager
Docker Cgroup 변경.
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 restart docker && sudo systemctl restart cri-docker
Kernel Forwarding , kube-proxy(= 파드의 통신, 오버레이 네트워크를 담당) 설정.
cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
br_netfilter
EOF
iptable이 오버레이 네트워크의 트래픽을 허용하도록 설정.
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sudo apt-get update
sudo apt-get install -y apt-transport-https ca-certificates curl
sudo curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg
echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
sudo apt-get update
sudo apt-get install -y kubelet kubeadm kubectl
버전 확인
kubectl version --short
해당 버전으로 고정
sudo apt-mark hold kubelet kubeadm kubectl
- Only Master Node
sudo kubeadm config images pull --cri-socket unix:///run/cri-dockerd.sock
sudo kubeadm init --pod-network-cidr=10.10.0.0/16 --apiserver-advertise-address=211.183.3.100 --cri-socket /var/run/cri-dockerd.sock
- Only worker Node
kubeadm join 211.183.3.100:6443 --token sgxslr.euy1fukqiriwa9ll \
--discovery-token-ca-cert-hash <여러분의 토큰> --cri-socket unix:///run/cri-dockerd.sock
마스터에서 발행된 토큰 뒤에 --cri-socket unix:///run/cri-dockerd.sock 를 붙여준다.
- Only Master Node
mkdir -p HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):(id -g) $HOME/.kube/config
CNI (Container Network Interface) - 컨테이너 네트워크를 구성하기 위한 플러그인
weavenet, calico 등의 오픈소스 플러그인이 존재하는데, calico 대신 CNI를 사용할 것이다
curl https://projectcalico.docs.tigera.io/manifests/calico.yaml -O
#calico 다운로드
sed -i -e 's?192.168.0.0/16?10.10.0.0/16?g' calico.yaml
우리는 아까 파드 네트워크를 10.10.0.0/16으로 변경했기때문에 CNI의 설정도 똑같이 변경해준다.
kubectl apply -f calico.yaml
master node history
5 sudo swapoff /swap.img
6 sudo sed -i -e '/swap.img/d' /etc/fstab
7 curl -fsSL https://get.docker.com -o get-docker.sh
8 sudo sh get-docker.sh
9 sudo systemctl restart docker
10 sudo systemctl enable docker
11 clear
12 git clone https://github.com/Mirantis/cri-dockerd.git
13 wget https://storage.googleapis.com/golang/getgo/installer_linux
14 chmod +x ./installer_linux
15 ./installer_linux
16 source ~/.bash_profile
17 cd cri-dockerd
18 mkdir bin
19 go build -o bin/cri-dockerd
20 mkdir -p /usr/local/bin
21 install -o root -g root -m 0755 bin/cri-dockerd
22 mkdir -p /usr/local/bin
23 install -o root -g root -m 0755 bin/cri-dockerd /usr/local/bin/cri-dockerd
24 cp -a packaging/systemd/* /etc/systemd/system
25 sed -i -e 's,/usr/bin/cri-dockerd,/usr/local/bin/cri-dockerd,' /etc/systemd/system/cri-docker.service
26 systemctl daemon-reload
27 systemctl enable cri-docker.service
28 systemctl enable --now cri-docker.socket
29 sudo systemctl restart docker && sudo systemctl restart cri-docker
30 sudo systemctl status cri-docker.socket --no-pager
31 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
32 sudo systemctl restart docker && sudo systemctl restart cri-docker
33 cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
br_netfilter
EOF
34 cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
35 sudo apt-get update
36 sudo apt-get install -y apt-transport-https ca-certificates curl
37 sudo curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg
38 sudo curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg
39 sudo curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg
40 echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
41 history
42 clear
43 sudo apt-get update
44 sudo apt-get install -y kubelet kubeadm kubectl
45 kubectl version --short
46 sudo apt-mark hold kubelet kubeadm kubectl
47 sudo kubeadm config images pull --cri-socket unix:///run/cri-dockerd.sock
48 sudo kubeadm init --pod-network-cidr=10.10.0.0/16 --apiserver-advertise-address=211.183.3.100 --cri-socket /var/run/cri-dockerd.sock
49 mkdir -p $HOME/.kube
50 sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
51 sudo chown $(id -u):$(id -g) $HOME/.kube/config
52 vi /etc/kubernetes/admin.conf
53 kubectl get node
54 curl https://projectcalico.docs.tigera.io/manifests/calico.yaml -O
55 sed -i -e 's?192.168.0.0/16?10.10.0.0/16?g' calico.yaml
56 vi calico.yaml
57 kubectl apply -f calico.yaml
58 kubectl get nodesworker 1 node history
5 sudo swapoff /swap.img
6 sudo sed -i -e '/swap.img/d' /etc/fstab
7 curl -fsSL https://get.docker.com -o get-docker.sh
8 sudo sh get-docker.sh
9 sudo systemctl restart docker
10 sudo systemctl enable docker
11 clear
12 git clone https://github.com/Mirantis/cri-dockerd.git
13 wget https://storage.googleapis.com/golang/getgo/installer_linux
14 chmod +x ./installer_linux
15 ./installer_linux
16 source ~/.bash_profile
17 cd cri-dockerd
18 mkdir bin
19 go build -o bin/cri-dockerd
20 mkdir -p /usr/local/bin
21 install -o root -g root -m 0755 bin/cri-dockerd /usr/local/bin/cri-dockerd
22 cp -a packaging/systemd/* /etc/systemd/system
23 sed -i -e 's,/usr/bin/cri-dockerd,/usr/local/bin/cri-dockerd,' /etc/systemd/system/cri-docker.service
24 systemctl daemon-reload
25 systemctl enable cri-docker.service
26 systemctl enable --now cri-docker.socket
27 sudo systemctl restart docker && sudo systemctl restart cri-docker
28 sudo systemctl status cri-docker.socket --no-pager
29 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
30 sudo systemctl restart docker && sudo systemctl restart cri-docker
31 cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
br_netfilter
EOF
32 cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
33 sudo apt-get update
34 sudo apt-get install -y apt-transport-https ca-certificates curl
35 sudo curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg
36 echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
37 clear
38 sudo apt-get update
39 sudo apt-get install -y kubelet kubeadm kubectl
40 kubectl version --short
41 sudo apt-mark hold kubelet kubeadm kubectl
42 kubeadm join 211.183.3.100:6443 --token pwf42v.u1nmoe0rdzukmhy8 --discovery-token-ca-cert-hash sha256:05bb3dfff1a1629749f30411f581198581d14a2b2328e0fa805c5e7d781931c1 --cri-socket unix:///run/cri-dockerd.sockworker 2 node history
5 sudo swapoff /swap.img
6 sudo sed -i -e '/swap.img/d' /etc/fstab
7 curl -fsSL https://get.docker.com -o get-docker.sh
8 sudo sh get-docker.sh
9 sudo systemctl restart docker
10 sudo systemctl enable docker
11 clear
12 git clone https://github.com/Mirantis/cri-dockerd.git
13 wget https://storage.googleapis.com/golang/getgo/installer_linux
14 chmod +x ./installer_linux
15 ./installer_linux
16 source ~/.bash_profile
17 cd cri-dockerd
18 mkdir bin
19 go build -o bin/cri-dockerd
20 mkdir -p /usr/local/bin
21 install -o root -g root -m 0755 bin/cri-dockerd /usr/local/bin/cri-dockerd
22 cp -a packaging/systemd/* /etc/systemd/system
23 sed -i -e 's,/usr/bin/cri-dockerd,/usr/local/bin/cri-dockerd,' /etc/systemd/system/cri-docker.service
24 systemctl daemon-reload
25 systemctl enable cri-docker.service
26 systemctl enable --now cri-docker.socket
27 sudo systemctl restart docker && sudo systemctl restart cri-docker
28 sudo systemctl status cri-docker.socket --no-pager
29 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
30 sudo systemctl restart docker && sudo systemctl restart cri-docker
31 cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
br_netfilter
EOF
32 cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
33 sudo apt-get update
34 sudo apt-get install -y apt-transport-https ca-certificates curl
35 sudo curl -fsSLo /usr/share/keyrings/kubernetes-archive-keyring.gpg https://packages.cloud.google.com/apt/doc/apt-key.gpg
36 echo "deb [signed-by=/usr/share/keyrings/kubernetes-archive-keyring.gpg] https://apt.kubernetes.io/ kubernetes-xenial main" | sudo tee /etc/apt/sources.list.d/kubernetes.list
37 clear
38 sudo apt-get update
39 sudo apt-get install -y kubelet kubeadm kubectl
40 kubectl version --short
41 sudo apt-mark hold kubelet kubeadm kubectl
42 kubeadm join 211.183.3.100:6443 --token pwf42v.u1nmoe0rdzukmhy8 --discovery-token-ca-cert-hash sha256:05bb3dfff1a1629749f30411f581198581d14a2b2328e0fa805c5e7d781931c1 --cri-socket unix:///run/cri-dockerd.sock
컴포넌트들은 컨테이너로 이루어져 있음
root@master:~/cri-dockerd# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
c8ffe8615af9 5185b96f0bec "/coredns -conf /etc…" 52 minutes ago Up 52 minutes k8s_coredns_coredns-787d4945fb-szkxc_kube-system_278d14ac-5230-4120-9dbd-c41420f8cae1_0
fa609ed3d08b 5185b96f0bec "/coredns -conf /etc…" 52 minutes ago Up 52 minutes k8s_coredns_coredns-787d4945fb-6j6m5_kube-system_ce9b94f8-e47c-4973-8285-99489d94be8e_0
17193f835516 registry.k8s.io/pause:3.6 "/pause" 52 minutes ago Up 52 minutes k8s_POD_calico-kube-controllers-7bdbfc669-vtkvx_kube-system_4db96924-e71b-4458-8178-cae780b81924_7
f9f3e6b796f7 registry.k8s.io/pause:3.6 "/pause" 52 minutes ago Up 52 minutes k8s_POD_coredns-787d4945fb-szkxc_kube-system_278d14ac-5230-4120-9dbd-c41420f8cae1_5
8a6c65f2df64 registry.k8s.io/pause:3.6 "/pause" 52 minutes ago Up 52 minutes k8s_POD_coredns-787d4945fb-6j6m5_kube-system_ce9b94f8-e47c-4973-8285-99489d94be8e_6
1a736b3200fd 54637cb36d4a "start_runit" 52 minutes ago Up 52 minutes k8s_calico-node_calico-node-6qwqc_kube-system_c552ddb8-94ef-40cb-801e-adbe5d5e0d33_0
8509d48b28f0 registry.k8s.io/pause:3.6 "/pause" 53 minutes ago Up 53 minutes k8s_POD_calico-node-6qwqc_kube-system_c552ddb8-94ef-40cb-801e-adbe5d5e0d33_0
d9ef632d4182 556768f31eb1 "/usr/local/bin/kube…" About an hour ago Up About an hour k8s_kube-proxy_kube-proxy-v6s56_kube-system_ef892210-6d97-42b6-9205-d94a9c85773b_0
36a7995b5ab9 registry.k8s.io/pause:3.6 "/pause" About an hour ago Up About an hour k8s_POD_kube-proxy-v6s56_kube-system_ef892210-6d97-42b6-9205-d94a9c85773b_0
b92b9ec68745 dafd8ad70b15 "kube-scheduler --au…" About an hour ago Up About an hour k8s_kube-scheduler_kube-scheduler-master_kube-system_ed005ef5c70ffeb7405e6e1e3ef0f5f2_0
3e6e6be36416 a31e1d84401e "kube-apiserver --ad…" About an hour ago Up About an hour k8s_kube-apiserver_kube-apiserver-master_kube-system_f59a75118a056a401a2dd7f00bf0971a_0
6c3db0c19859 5d7c5dfd3ba1 "kube-controller-man…" About an hour ago Up About an hour k8s_kube-controller-manager_kube-controller-manager-master_kube-system_2143afa0fd4147e948b0484f607c8818_0
b91cb81d472b fce326961ae2 "etcd --advertise-cl…" About an hour ago Up About an hour k8s_etcd_etcd-master_kube-system_0a6c20b596244b014d4229cec39c7489_0
fcd2f15adc08 registry.k8s.io/pause:3.6 "/pause" About an hour ago Up About an hour k8s_POD_etcd-master_kube-system_0a6c20b596244b014d4229cec39c7489_0
28503094e79f registry.k8s.io/pause:3.6 "/pause" About an hour ago Up About an hour k8s_POD_kube-controller-manager-master_kube-system_2143afa0fd4147e948b0484f607c8818_0
97e79a45f886 registry.k8s.io/pause:3.6 "/pause" About an hour ago Up About an hour k8s_POD_kube-apiserver-master_kube-system_f59a75118a056a401a2dd7f00bf0971a_0
389062f41732 registry.k8s.io/pause:3.6 "/pause" About an hour ago Up About an hour k8s_POD_kube-scheduler-master_kube-system_ed005ef5c70ffeb7405e6e1e3ef0f5f2_0
pod(하나 이상의 컨테이너)들은 네임스페이스를 기준으로 정리되어 있다.
지금 default 네임스페이스에 위치해있는 상태
root@master:~/cri-dockerd# kubectl get pod
No resources found in default namespace.
root@master:~/cri-dockerd# kubectl get pod --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system calico-kube-controllers-7bdbfc669-vtkvx 0/1 ImagePullBackOff 0 56m
kube-system calico-node-6qwqc 1/1 Running 0 56m
kube-system calico-node-ddk9t 1/1 Running 0 56m
kube-system calico-node-z9vsh 1/1 Running 0 56m
kube-system coredns-787d4945fb-6j6m5 1/1 Running 0 70m
kube-system coredns-787d4945fb-szkxc 1/1 Running 0 70m
kube-system etcd-master 1/1 Running 0 70m
kube-system kube-apiserver-master 1/1 Running 0 70m
kube-system kube-controller-manager-master 1/1 Running 0 70m
kube-system kube-proxy-c8s7q 1/1 Running 0 66m
kube-system kube-proxy-fblbx 1/1 Running 0 66m
kube-system kube-proxy-v6s56 1/1 Running 0 70m
kube-system kube-scheduler-master 1/1 Running 0 70m
controller : 내가 선언한 상태에 수렴하려고 노력한다
root@master:~/cri-dockerd# kubectl run test --image=nginx
pod/test created
root@master:~/cri-dockerd# docker login
master, worker1, worker2 노드 docker login
root@master:~/cri-dockerd# kubectl run test --image=nginx
pod/test created
root@master:~/cri-dockerd# curl 10.10.235.130
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html { color-scheme: light dark; }
body { width: 35em; margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif; }
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
root@master:~# kubectl get pod -o wide --watch
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
test 0/1 Pending 0 0s <none> <none> <none> <none>
test 0/1 Pending 0 0s <none> worker1 <none> <none>
test 0/1 ContainerCreating 0 0s <none> worker1 <none> <none>
test 0/1 ContainerCreating 0 1s <none> worker1 <none> <none>
test 1/1 Running 0 5s 10.10.235.130 worker1 <none> <none>
root@master:~/cri-dockerd# kubectl delete pod test
pod "test" deleted
root@master:~# kubectl get pod -o wide --watch
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
test 0/1 Pending 0 0s <none> <none> <none> <none>
test 0/1 Pending 0 0s <none> worker1 <none> <none>
test 0/1 ContainerCreating 0 0s <none> worker1 <none> <none>
test 0/1 ContainerCreating 0 1s <none> worker1 <none> <none>
test 1/1 Running 0 5s 10.10.235.130 worker1 <none> <none>
test 1/1 Terminating 0 3m31s 10.10.235.130 worker1 <none> <none>
test 1/1 Terminating 0 3m31s 10.10.235.130 worker1 <none> <none>
test 0/1 Terminating 0 3m32s 10.10.235.130 worker1 <none> <none>
test 0/1 Terminating 0 3m32s 10.10.235.130 worker1 <none> <none>
test 0/1 Terminating 0 3m32s 10.10.235.130 worker1 <none> <none>
yaml : 매니페스트 파일
root@master:~/cri-dockerd# vi test.yml
*******
# api 버전 명시
# 어떤 오브젝트를 쓸 것인지 결정해야 하고 오브젝트는
# pod, namespace, replicaSet, Deployment, Persistant volume 등이 있다.
apiVersion: v1
kind: Pod # 오브젝트 명시
metadata: # 이름, 혹은 라벨
name: test
spec: # 원하는 상태- 계속 원하는 상태가 됐는지감시를 계속한다 만약, 충족되지 않았다면충족시키려고 노력
containers:
- name: test-container
image: nginx
*******
create 말고 apply 을 주로 쓰는 이유는 yml 파일이 변경됐을 시, 자동으로 이미지의 버전을 업데이트한다
root@master:~/cri-dockerd# kubectl apply -f test.yml
pod/test created
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
test 0/1 Pending 0 0s <none> <none> <none> <none>
test 0/1 Pending 0 0s <none> worker1 <none> <none>
test 0/1 ContainerCreating 0 0s <none> worker1 <none> <none>
test 0/1 ContainerCreating 0 3s <none> worker1 <none> <none>
test 1/1 Running 0 6s 10.10.235.131 worker1 <none> <none>
root@master:~/cri-dockerd# kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
test 1/1 Running 0 61s 10.10.235.131 worker1 <none> <none>
제원을 더 자세히 보고싶을 때 - describe
root@master:~/cri-dockerd# kubectl delete pod test
pod "test" deleted
root@master:~/cri-dockerd# vi test.yml
apiVersion: v1
kind: Pod # 오브젝트 명시
metadata: # 이름, 혹은 라벨
name: test
spec: # 원하는 상태- 계속 원하는 상태가 됐는지감시를 계속한다 만약, 충족되지 않았다면충족시키려고 노력
containers:
- name: test-container
image: nginx
- name: centos-container
image: centos:7
command:
- sleep
- "10000"replicaset
root@master:~/cri-dockerd# kubectl delete pod test
pod "test" deleted
root@master:~/cri-dockerd# vi rs.yml
**********
apiVersion: apps/v1
kind: ReplicaSet
metadata:
name: rs
spec:
selector:
matchLabels:
app: test
replicas: 3
template:
metadata:
name: test
labels:
app: test
spec:
containers:
- name: test-container
image: nginx
**********
root@master:~/cri-dockerd# kubectl get pod
NAME READY STATUS RESTARTS AGE
rs-5zzlg 1/1 Running 0 3m19s
rs-hhwgk 0/1 ImagePullBackOff 0 3m19s
rs-sgf6f 1/1 Running 0 3m19s
두번째 pod 는 자체오류로 running 이라고 가정해서 진행
일단 삭제 해보자
root@master:~/cri-dockerd# kubectl delete pod rs-hhwgk
같은 오류 돈 안내서 그런거 같다
root@master:~/cri-dockerd# kubectl delete rs rs
root@master:~/cri-dockerd# kubectl get pod
No resources found in default namespace.
Deployment
root@master:~/cri-dockerd# vi deploy-nginx.yml
****
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-nginx-deployment
spec:
replicas: 2
selector:
matchLabels:
app: my-nginx
template:
metadata:
name: my-nginx-pod
labels:
app: my-nginx
spec:
containers:
- name: nginx
image: nginx
ports:
- containerPort: 80
****
root@master:~/cri-dockerd# kubectl apply -f deploy-nginx.yml
root@master:~/cri-dockerd# kubectl delete deployment my-nginx-deployment
root@master:~/cri-dockerd# kubectl get pod
NAME READY STATUS RESTARTS AGE
my-nginx-deployment-7c58d86666-4nghn 1/1 Running 0 7m37s
my-nginx-deployment-7c58d86666-58k9p 0/1 ImagePullBackOff 0 7m37s
my-nginx-deployment-7c58d86666-tc4sc 1/1 Running 0 7m37s
root@master:~/cri-dockerd# kubectl get replicasets
NAME DESIRED CURRENT READY AGE
my-nginx-deployment-7c58d86666 3 3 2 8m38s
무럭무럭 자라볼까