151 lines
3.3 KiB
Markdown
151 lines
3.3 KiB
Markdown
# Scheduler
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```bash
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{
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cat > kube-scheduler-csr.json <<EOF
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{
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"CN": "system:kube-scheduler",
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"key": {
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"algo": "rsa",
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"size": 2048
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},
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"names": [
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{
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"C": "US",
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"L": "Portland",
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"O": "system:kube-scheduler",
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"OU": "Kubernetes The Hard Way",
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"ST": "Oregon"
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}
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]
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}
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EOF
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cfssl gencert \
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-ca=ca.pem \
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-ca-key=ca-key.pem \
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-config=ca-config.json \
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-profile=kubernetes \
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kube-scheduler-csr.json | cfssljson -bare kube-scheduler
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}
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```
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```bash
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{
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kubectl config set-cluster kubernetes-the-hard-way \
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--certificate-authority=ca.pem \
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--embed-certs=true \
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--server=https://127.0.0.1:6443 \
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--kubeconfig=kube-scheduler.kubeconfig
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kubectl config set-credentials system:kube-scheduler \
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--client-certificate=kube-scheduler.pem \
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--client-key=kube-scheduler-key.pem \
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--embed-certs=true \
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--kubeconfig=kube-scheduler.kubeconfig
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kubectl config set-context default \
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--cluster=kubernetes-the-hard-way \
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--user=system:kube-scheduler \
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--kubeconfig=kube-scheduler.kubeconfig
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kubectl config use-context default --kubeconfig=kube-scheduler.kubeconfig
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}
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```
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```bash
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wget -q --show-progress --https-only --timestamping \
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"https://storage.googleapis.com/kubernetes-release/release/v1.21.0/bin/linux/amd64/kube-scheduler"
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```
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```bash
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{
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chmod +x kube-scheduler
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sudo mv kube-scheduler /usr/local/bin/
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}
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```
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```bash
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sudo mv kube-scheduler.kubeconfig /var/lib/kubernetes/
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```
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```bash
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cat <<EOF | sudo tee /etc/kubernetes/config/kube-scheduler.yaml
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apiVersion: kubescheduler.config.k8s.io/v1beta1
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kind: KubeSchedulerConfiguration
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clientConnection:
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kubeconfig: "/var/lib/kubernetes/kube-scheduler.kubeconfig"
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leaderElection:
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leaderElect: true
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EOF
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```
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```bash
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cat <<EOF | sudo tee /etc/systemd/system/kube-scheduler.service
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[Unit]
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Description=Kubernetes Scheduler
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Documentation=https://github.com/kubernetes/kubernetes
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[Service]
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ExecStart=/usr/local/bin/kube-scheduler \\
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--config=/etc/kubernetes/config/kube-scheduler.yaml \\
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--v=2
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Restart=on-failure
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RestartSec=5
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[Install]
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WantedBy=multi-user.target
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EOF
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```
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```bash
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{
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sudo systemctl daemon-reload
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sudo systemctl enable kube-scheduler
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sudo systemctl start kube-scheduler
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}
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```
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```bash
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sudo systemctl status kube-scheduler
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```
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```
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● kube-scheduler.service - Kubernetes Scheduler
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Loaded: loaded (/etc/systemd/system/kube-scheduler.service; enabled; vendor preset: enabled)
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Active: active (running) since Thu 2023-04-20 11:57:44 UTC; 16s ago
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Docs: https://github.com/kubernetes/kubernetes
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Main PID: 15134 (kube-scheduler)
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Tasks: 7 (limit: 2275)
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Memory: 13.7M
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CGroup: /system.slice/kube-scheduler.service
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└─15134 /usr/local/bin/kube-scheduler --config=/etc/kubernetes/config/kube-scheduler.yaml --v=2
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...
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```
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```bash
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kubectl get pod -o wide
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```
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```
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hello-world 1/1 Running 0 35m 10.240.1.9 example-server <none> <none>
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nginx-deployment-5d9cbcf759-x4pk8 1/1 Running 0 9m34s 10.240.1.10 example-server <none> <none>
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```
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```bash
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kubectl logs nginx-deployment-5d9cbcf759-x4pk8
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```
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```
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Hello, World from deployment!
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Hello, World from deployment!
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Hello, World from deployment!
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...
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```
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Next: [Kube proxy](./09-kubeproxy.md) |