Cyber Security || DevSecOps
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How many Services exist on the system?

 kubectl get services --all-namespaces
kubectl get svc kubernetes -o yaml
kubectl scale statefulset vault -n vault --replicas=1
kubectl exec -it vault-0 -n vault -- /bin/sh
vault operator init
vault operator unseal
vault operator unseal
vault operator unseal
vault status
vault login <root_token>
kubeadm upgrade plan
— bu buyruq Kubernetes klasterni yangilashdan oldin qaysi versiyaga yangilanish mumkinligini va qadamlar rejasini ko‘rsatadi.
Chrony yoki NTP yordamida vaqtni avtomatik sinxronlashtirish:

# RHEL/CentOS/AlmaLinux
sudo yum install -y chrony
sudo systemctl enable --now chronyd
sudo chronyc tracking
# Eski repo o'chirish
sudo rm -f /etc/yum.repos.d/kubernetes.repo

# Yangi repo qo'shish (v1.34 uchun)
cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://pkgs.k8s.io/core:/stable:/v1.34/rpm/
enabled=1
gpgcheck=1
gpgkey=https://pkgs.k8s.io/core:/stable:/v1.34/rpm/repodata/repomd.xml.key
exclude=kubelet kubeadm kubectl cri-tools kubernetes-cni
EOF

# Cache tozalash
sudo dnf clean all
sudo dnf makecache

# O'rnatish
sudo dnf install -y kubeadm kubelet kubectl --disableexcludes=kubernetes

# Restart
sudo systemctl daemon-reload
sudo systemctl restart kubelet

# Versiyani tekshirish
kubelet --version