完整踩坑和精简内容
k8s containerd配置
containerd安装参考
k8s安装参考
环境
两台机器
hostnamectl set-hostname master
hostnamectl set-hostname node1
# 10.1.1.10 master
# 10.1.1.11 node1
cat > /etc/hosts << EOF
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
10.1.1.10 master
10.1.1.11 node1
EOF
系统
CentOS 7.9
必要的设置
- 1、关闭swap
swapoff -a
sed -ri 's/.*swap.*/#&/' /etc/fstab
cat > /etc/sysctl.conf << EOF
vm.swappiness=0
EOF
# 生效
sysctl -p
free -m
- 2、网桥设置
cat <<EOF | tee /etc/modules-load.d/k8s.conf
overlay
br_netfilter
EOF
cat <<EOF | tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system
modprobe br_netfilter
modprobe overlay
lsmod | grep -e br_netfilter -e overlay
# overlay 91659 0
# br_netfilter 22256 0
# bridge 151336 1 br_netfilter
- 3、ipvs设置
yum install ipset ipvsadm -y
cat > /etc/sysconfig/modules/ipvs.modules <<EOF
#!/bin/bash
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack_ipv4
EOF
chmod +x /etc/sysconfig/modules/ipvs.modules
/bin/bash /etc/sysconfig/modules/ipvs.modules
lsmod | grep -e ip_vs -e nf_conntrack_ipv4
# nf_conntrack_ipv4 15053 0
# nf_defrag_ipv4 12729 1 nf_conntrack_ipv4
# ip_vs_sh 12688 0
# ip_vs_wrr 12697 0
# ip_vs_rr 12600 0
# ip_vs 145458 6 ip_vs_rr,ip_vs_sh,ip_vs_wrr
# nf_conntrack 139264 2 ip_vs,nf_conntrack_ipv4
# libcrc32c 12644 3 xfs,ip_vs,nf_conntrack
- 4、关闭防火墙
iptables -F
iptables -X
- 5、禁用selinux
getenforce
setenforce 0
sed -i 's/^SELINUX=enforcing$/SELINUX=disabled/g' /etc/selinux/config
- 6、添加源
yum install -y wget && wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
cat > /etc/yum.repos.d/kubernetes.repo << EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
集群搭建
在所有节点上执行
- 1、安装最新的kubectl kubelet kubeadm
yum install kubectl kubelet kubeadm -y
systemctl start kubelet.service
systemctl enable kubelet.service
- 2、安装containerd
安装
yum install containerd -y
systemctl enable containerd.service
配置
containerd config default | tee /etc/containerd/config.toml
cat > /etc/containerd/config.toml << EOF
disabled_plugins = []
imports = []
oom_score = 0
plugin_dir = ""
required_plugins = []
root = "/var/lib/containerd"
state = "/run/containerd"
temp = ""
version = 2
[cgroup]
path = ""
[debug]
address = ""
format = ""
gid = 0
level = ""
uid = 0
[grpc]
address = "/run/containerd/containerd.sock"
gid = 0
max_recv_message_size = 16777216
max_send_message_size = 16777216
tcp_address = ""
tcp_tls_ca = ""
tcp_tls_cert = ""
tcp_tls_key = ""
uid = 0
[metrics]
address = ""
grpc_histogram = false
[plugins]
[plugins."io.containerd.gc.v1.scheduler"]
deletion_threshold = 0
mutation_threshold = 100
pause_threshold = 0.02
schedule_delay = "0s"
startup_delay = "100ms"
[plugins."io.containerd.grpc.v1.cri"]
device_ownership_from_security_context = false
disable_apparmor = false
disable_cgroup = false
disable_hugetlb_controller = true
disable_proc_mount = false
disable_tcp_service = true
enable_selinux = false
enable_tls_streaming = false
enable_unprivileged_icmp = false
enable_unprivileged_ports = false
ignore_image_defined_volumes = false
max_concurrent_downloads = 3
max_container_log_line_size = 16384
netns_mounts_under_state_dir = false
restrict_oom_score_adj = false
# 注释上面那行，添加下面这行，注意pause版本
sandbox_image = "registry.aliyuncs.com/google_containers/pause:3.8"
selinux_category_range = 1024
stats_collect_period = 10
stream_idle_timeout = "4h0m0s"
stream_server_address = "127.0.0.1"
stream_server_port = "0"
systemd_cgroup = false
tolerate_missing_hugetlb_controller = true
unset_seccomp_profile = ""
[plugins."io.containerd.grpc.v1.cri".cni]
bin_dir = "/opt/cni/bin"
conf_dir = "/etc/cni/net.d"
conf_template = ""
ip_pref = ""
max_conf_num = 1
[plugins."io.containerd.grpc.v1.cri".containerd]
default_runtime_name = "runc"
disable_snapshot_annotations = true
discard_unpacked_layers = false
ignore_rdt_not_enabled_errors = false
no_pivot = false
snapshotter = "overlayfs"
[plugins."io.containerd.grpc.v1.cri".containerd.default_runtime]
base_runtime_spec = ""
cni_conf_dir = ""
cni_max_conf_num = 0
container_annotations = []
pod_annotations = []
privileged_without_host_devices = false
runtime_engine = ""
runtime_path = ""
runtime_root = ""
runtime_type = ""
[plugins."io.containerd.grpc.v1.cri".containerd.default_runtime.options]
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes]
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc]
base_runtime_spec = ""
cni_conf_dir = ""
cni_max_conf_num = 0
container_annotations = []
pod_annotations = []
privileged_without_host_devices = false
runtime_engine = ""
runtime_path = ""
runtime_root = ""
runtime_type = "io.containerd.runc.v2"
[plugins."io.containerd.grpc.v1.cri".containerd.runtimes.runc.options]
BinaryName = ""
CriuImagePath = ""
CriuPath = ""
CriuWorkPath = ""
IoGid = 0
IoUid = 0
NoNewKeyring = false
NoPivotRoot = false
Root = ""
ShimCgroup = ""
# 修改下面这行
SystemdCgroup = true
[plugins."io.containerd.grpc.v1.cri".containerd.untrusted_workload_runtime]
base_runtime_spec = ""
cni_conf_dir = ""
cni_max_conf_num = 0
container_annotations = []
pod_annotations = []
privileged_without_host_devices = false
runtime_engine = ""
runtime_path = ""
runtime_root = ""
runtime_type = ""
[plugins."io.containerd.grpc.v1.cri".containerd.untrusted_workload_runtime.options]
[plugins."io.containerd.grpc.v1.cri".image_decryption]
key_model = "node"
[plugins."io.containerd.grpc.v1.cri".registry]
config_path = ""
[plugins."io.containerd.grpc.v1.cri".registry.auths]
[plugins."io.containerd.grpc.v1.cri".registry.configs]
[plugins."io.containerd.grpc.v1.cri".registry.headers]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."docker.io"]
#endpoint = ["https://registry-1.docker.io"]
# 注释上面那行，添加下面三行
endpoint = ["https://docker.mirrors.ustc.edu.cn"]
[plugins."io.containerd.grpc.v1.cri".registry.mirrors."k8s.gcr.io"]
endpoint = ["https://registry.aliyuncs.com/google_containers"]
[plugins."io.containerd.grpc.v1.cri".x509_key_pair_streaming]
tls_cert_file = ""
tls_key_file = ""
[plugins."io.containerd.internal.v1.opt"]
path = "/opt/containerd"
[plugins."io.containerd.internal.v1.restart"]
interval = "10s"
[plugins."io.containerd.internal.v1.tracing"]
sampling_ratio = 1.0
service_name = "containerd"
[plugins."io.containerd.metadata.v1.bolt"]
content_sharing_policy = "shared"
[plugins."io.containerd.monitor.v1.cgroups"]
no_prometheus = false
[plugins."io.containerd.runtime.v1.linux"]
no_shim = false
runtime = "runc"
runtime_root = ""
shim = "containerd-shim"
shim_debug = false
[plugins."io.containerd.runtime.v2.task"]
platforms = ["linux/amd64"]
sched_core = false
[plugins."io.containerd.service.v1.diff-service"]
default = ["walking"]
[plugins."io.containerd.service.v1.tasks-service"]
rdt_config_file = ""
[plugins."io.containerd.snapshotter.v1.aufs"]
root_path = ""
[plugins."io.containerd.snapshotter.v1.btrfs"]
root_path = ""
[plugins."io.containerd.snapshotter.v1.devmapper"]
async_remove = false
base_image_size = ""
discard_blocks = false
fs_options = ""
fs_type = ""
pool_name = ""
root_path = ""
[plugins."io.containerd.snapshotter.v1.native"]
root_path = ""
[plugins."io.containerd.snapshotter.v1.overlayfs"]
root_path = ""
upperdir_label = false
[plugins."io.containerd.snapshotter.v1.zfs"]
root_path = ""
[plugins."io.containerd.tracing.processor.v1.otlp"]
endpoint = ""
insecure = false
protocol = ""
[proxy_plugins]
[stream_processors]
[stream_processors."io.containerd.ocicrypt.decoder.v1.tar"]
accepts = ["application/vnd.oci.image.layer.v1.tar+encrypted"]
args = ["--decryption-keys-path", "/etc/containerd/ocicrypt/keys"]
env = ["OCICRYPT_KEYPROVIDER_CONFIG=/etc/containerd/ocicrypt/ocicrypt_keyprovider.conf"]
path = "ctd-decoder"
returns = "application/vnd.oci.image.layer.v1.tar"
[stream_processors."io.containerd.ocicrypt.decoder.v1.tar.gzip"]
accepts = ["application/vnd.oci.image.layer.v1.tar+gzip+encrypted"]
args = ["--decryption-keys-path", "/etc/containerd/ocicrypt/keys"]
env = ["OCICRYPT_KEYPROVIDER_CONFIG=/etc/containerd/ocicrypt/ocicrypt_keyprovider.conf"]
path = "ctd-decoder"
returns = "application/vnd.oci.image.layer.v1.tar+gzip"
[timeouts]
"io.containerd.timeout.bolt.open" = "0s"
"io.containerd.timeout.shim.cleanup" = "5s"
"io.containerd.timeout.shim.load" = "5s"
"io.containerd.timeout.shim.shutdown" = "3s"
"io.containerd.timeout.task.state" = "2s"
[ttrpc]
address = ""
gid = 0
uid = 0
EOF
重启
systemctl daemon-reload
systemctl restart containerd
- 3、安装crictl
wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.24.2/crictl-v1.24.2-linux-amd64.tar.gz
tar -zxf crictl-v1.24.2-linux-amd64.tar.gz
mv crictl /usr/local/bin/
编写配置文件
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///var/run/containerd/containerd.sock
image-endpoint: unix:///var/run/containerd/containerd.sock
timeout: 10
debug: false
pull-image-on-create: false
EOF
下载镜像
kubeadm --config=kubeadm.yml config images list
master
tee ./images.sh <<'EOF'
#!/bin/bash
images=(
kube-apiserver:v1.25.0
kube-controller-manager:v1.25.0
kube-scheduler:v1.25.0
kube-proxy:v1.25.0
pause:3.8
etcd:3.5.4-0
coredns:v1.9.3
)
for imageName in ${images[@]} ; do
crictl pull registry.aliyuncs.com/google_containers/$imageName
done
EOF
chmod +x ./images.sh && ./images.sh
node
tee ./images.sh <<'EOF'
#!/bin/bash
images=(
kube-proxy:v1.25.0
pause:3.8
)
for imageName in ${images[@]} ; do
crictl pull registry.aliyuncs.com/google_containers/$imageName
done
EOF
chmod +x ./images.sh && ./images.sh
此后步骤master上执行
- 4、通过kubeadm生成默认config文件
kubeadm config print init-defaults --kubeconfig ClusterConfiguration > kubeadm.yml
修改配置文件
1）修改 criSocket：默认使用docker做为runtime，修改为containerd.sock，使用containerd做为runtime
2）修改imageRepository，改为aliyun的镜像仓库地址
3）修改podSubnet以及serviceSubnet，根据的自己的环境进行设置
4）设置cgroupDriver为systemd，非必要
5）修改advertiseAddress为正确ip地址或者0.0.0.0
修改后的配置文件
apiVersion: kubeadm.k8s.io/v1beta3
bootstrapTokens:
- groups:
- system:bootstrappers:kubeadm:default-node-token
token: abcdef.0123456789abcdef
ttl: 24h0m0s
usages:
- signing
- authentication
kind: InitConfiguration
localAPIEndpoint:
advertiseAddress: 0.0.0.0
bindPort: 6443
nodeRegistration:
criSocket: unix:///var/run/containerd/containerd.sock
imagePullPolicy: IfNotPresent
name: master
taints: null
---
apiServer:
timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta3
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns: {}
etcd:
local:
dataDir: /var/lib/etcd
imageRepository: registry.aliyuncs.com/google_containers
kind: ClusterConfiguration
kubernetesVersion: 1.25.0
networking:
dnsDomain: cluster.local
podSubnet: 10.10.0.0/16
serviceSubnet: 10.96.0.0/12
scheduler: {}
- 5、初始化master集群
# 重置命令
kubeadm reset -f
# 初始化
# kubeadm init --config=kubeadm.yml --upload-certs --ignore-preflight-errors=ImagePull
W0823 07:37:26.188671 6862 initconfiguration.go:306] error unmarshaling configuration schema.GroupVersionKind{Group:"kubeadm.k8s.io", Version:"v1beta3", Kind:"ClusterConfiguration"}: strict decoding error: unknown field "cgroupdriver"
[init] Using Kubernetes version: v1.24.0
[preflight] Running pre-flight checks
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
[certs] Using certificateDir folder "/etc/kubernetes/pki"
[certs] Generating "ca" certificate and key
[certs] Generating "apiserver" certificate and key
[certs] apiserver serving cert is signed for DNS names [kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local master] and IPs [10.96.0.1 10.1.1.10]
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Generating "front-proxy-ca" certificate and key
[certs] Generating "front-proxy-client" certificate and key
[certs] Generating "etcd/ca" certificate and key
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [localhost master] and IPs [10.1.1.10 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [localhost master] and IPs [10.1.1.10 127.0.0.1 ::1]
[certs] Generating "etcd/healthcheck-client" certificate and key
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "sa" key and public key
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"
[kubeconfig] Writing "admin.conf" kubeconfig file
[kubeconfig] Writing "kubelet.conf" kubeconfig file
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[kubeconfig] Writing "scheduler.conf" kubeconfig file
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Starting the kubelet
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
[control-plane] Creating static Pod manifest for "kube-scheduler"
[etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests"
[wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s
[apiclient] All control plane components are healthy after 19.504370 seconds
[upload-config] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[kubelet] Creating a ConfigMap "kubelet-config" in namespace kube-system with the configuration for the kubelets in the cluster
[upload-certs] Storing the certificates in Secret "kubeadm-certs" in the "kube-system" Namespace
[upload-certs] Using certificate key:
ae70a9e894995efc394ec730e11bc660f54d717c670e3cc0b5c87a6bae5705c3
[mark-control-plane] Marking the node master as control-plane by adding the labels: [node-role.kubernetes.io/control-plane node.kubernetes.io/exclude-from-external-load-balancers]
[mark-control-plane] Marking the node master as control-plane by adding the taints [node-role.kubernetes.io/master:NoSchedule node-role.kubernetes.io/control-plane:NoSchedule]
[bootstrap-token] Using token: abcdef.0123456789abcdef
[bootstrap-token] Configuring bootstrap tokens, cluster-info ConfigMap, RBAC Roles
[bootstrap-token] Configured RBAC rules to allow Node Bootstrap tokens to get nodes
[bootstrap-token] Configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[bootstrap-token] Configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[bootstrap-token] Configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstrap-token] Creating the "cluster-info" ConfigMap in the "kube-public" namespace
[kubelet-finalize] Updating "/etc/kubernetes/kubelet.conf" to point to a rotatable kubelet client certificate and key
[addons] Applied essential addon: CoreDNS
[addons] Applied essential addon: kube-proxy
Your Kubernetes control-plane has initialized successfully!
To start using your cluster, you need to run the following as a regular user:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
Alternatively, if you are the root user, you can run:
export KUBECONFIG=/etc/kubernetes/admin.conf
You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
https://kubernetes.io/docs/concepts/cluster-administration/addons/
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 10.1.1.10:6443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:3effc72f50d0cefff23de6b4bece8962b59bc8e57b2ab641cb0bfd36460f1c4f
- 6、设置.kube/config(只在master执行)
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config
- 7、calico网络插件安装
kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml
查看master状态
[root@master ~]# kubectl get pods -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system calico-kube-controllers-5b97f5d8cf-qrg87 0/1 Pending 0 2m36s
kube-system calico-node-4j8s9 0/1 Init:0/3 0 2m36s
kube-system calico-node-7vnhb 0/1 Init:0/3 0 2m36s
kube-system coredns-74586cf9b6-glsgz 0/1 Pending 0 14h
kube-system coredns-74586cf9b6-hgtf7 0/1 Pending 0 14h
kube-system etcd-master 1/1 Running 1 (54m ago) 14h
kube-system kube-apiserver-master 1/1 Running 1 (54m ago) 14h
kube-system kube-controller-manager-master 1/1 Running 1 (54m ago) 14h
kube-system kube-proxy-mq7b9 1/1 Running 1 (53m ago) 14h
kube-system kube-proxy-wwr6d 1/1 Running 1 (54m ago) 14h
kube-system kube-scheduler-master 1/1 Running 1 (54m ago) 14h
[root@master ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master NotReady control-plane 14h v1.24.4
- 8、node1节点加入集群
# kubeadm join 10.1.1.10:6443 --token abcdef.0123456789abcdef \
# > --discovery-token-ca-cert-hash sha256:3effc72f50d0cefff23de6b4bece8962b59bc8e57b2ab641cb0bfd36460f1c4f
[preflight] Running pre-flight checks
[preflight] Reading configuration from the cluster...
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Starting the kubelet
[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...
This node has joined the cluster:
* Certificate signing request was sent to apiserver and a response was received.
* The Kubelet was informed of the new secure connection details.
Run 'kubectl get nodes' on the control-plane to see this node join the cluster.
加入后在master节点查看状态
kubectl get nodes
- 9、node节点加入集群令牌有效期为24小时，master节点可以生成新令牌
[root@master ~]# kubeadm token create --print-join-command
kubeadm join 10.1.1.10:6443 --token 52nf1s.puunevi6fxb9xit6 --discovery-token-ca-cert-hash sha256:3effc72f50d0cefff23de6b4bece8962b59bc8e57b2ab641cb0bfd36460f1c4f
- 10、使node节点也可以执行kubectl命令
scp -r $HOME/.kube node1:$HOME
kubectl get nodes
- 11、master节点部署dashboard
关于dashborad和k8s版本的对应关系
[root@master ~]# kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v2.5.1/aio/deploy/recommended.yaml
namespace/kubernetes-dashboard created
serviceaccount/kubernetes-dashboard created
service/kubernetes-dashboard created
secret/kubernetes-dashboard-certs created
secret/kubernetes-dashboard-csrf created
secret/kubernetes-dashboard-key-holder created
configmap/kubernetes-dashboard-settings created
role.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrole.rbac.authorization.k8s.io/kubernetes-dashboard created
rolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
clusterrolebinding.rbac.authorization.k8s.io/kubernetes-dashboard created
deployment.apps/kubernetes-dashboard created
service/dashboard-metrics-scraper created
deployment.apps/dashboard-metrics-scraper created
[root@master ~]# kubectl get pods -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system calico-kube-controllers-5b97f5d8cf-qrg87 1/1 Running 0 21m
kube-system calico-node-4j8s9 1/1 Running 0 21m
kube-system calico-node-7vnhb 1/1 Running 0 21m
kube-system coredns-74586cf9b6-glsgz 1/1 Running 0 15h
kube-system coredns-74586cf9b6-hgtf7 1/1 Running 0 15h
kube-system etcd-master 1/1 Running 1 (73m ago) 15h
kube-system kube-apiserver-master 1/1 Running 1 (73m ago) 15h
kube-system kube-controller-manager-master 1/1 Running 1 (73m ago) 15h
kube-system kube-proxy-mq7b9 1/1 Running 1 (72m ago) 15h
kube-system kube-proxy-wwr6d 1/1 Running 1 (73m ago) 15h
kube-system kube-scheduler-master 1/1 Running 1 (73m ago) 15h
kubernetes-dashboard dashboard-metrics-scraper-7bfdf779ff-pbnzr 1/1 Running 0 14s
kubernetes-dashboard kubernetes-dashboard-6465b7f54c-wtmf2 0/1 ContainerCreating 0 14s
设置访问端口
将type: ClusterIP改为：type: NodePort
[root@master ~]# kubectl edit svc kubernetes-dashboard -n kubernetes-dashboard
# Please edit the object below. Lines beginning with a '#' will be ignored,
# and an empty file will abort the edit. If an error occurs while saving this file will be
# reopened with the relevant failures.
#
apiVersion: v1
kind: Service
metadata:
annotations:
kubectl.kubernetes.io/last-applied-configuration: |
{"apiVersion":"v1","kind":"Service","metadata":{"annotations":{},"labels":{"k8s-app":"kubernetes-dashboard"},"name":"kubernetes-dashboard","namespace":"kubernetes-dashboard"},"spec":{"ports":[{"port":443,"targetPort":8443}],"selector":{"k8s-app":"kubernetes-dashboard"}}}
creationTimestamp: "2022-08-24T02:50:05Z"
labels:
k8s-app: kubernetes-dashboard
name: kubernetes-dashboard
namespace: kubernetes-dashboard
resourceVersion: "6865"
uid: ecf9f542-d1b3-4aa2-93db-89068fd71814
spec:
clusterIP: 10.100.215.190
clusterIPs:
- 10.100.215.190
internalTrafficPolicy: Cluster
ipFamilies:
- IPv4
ipFamilyPolicy: SingleStack
ports:
- port: 443
protocol: TCP
targetPort: 8443
selector:
k8s-app: kubernetes-dashboard
sessionAffinity: None
type: NodePort
status:
loadBalancer: {}
查看端口
[root@master ~]# kubectl get svc -A | grep kubernetes-dashboard
kubernetes-dashboard dashboard-metrics-scraper ClusterIP 10.101.228.146 <none> 8000/TCP 4m39s
kubernetes-dashboard kubernetes-dashboard NodePort 10.100.215.190 <none> 443:31132/TCP 4m39s
查看pods所有信息
[root@master ~]# kubectl get pods -A -o wide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-system calico-kube-controllers-5b97f5d8cf-qrg87 1/1 Running 0 40m 10.10.219.66 master <none> <none>
kube-system calico-node-4j8s9 1/1 Running 0 40m 10.1.1.10 master <none> <none>
kube-system calico-node-7vnhb 1/1 Running 0 40m 10.1.1.11 node1 <none> <none>
kube-system coredns-74586cf9b6-glsgz 1/1 Running 0 15h 10.10.219.65 master <none> <none>
kube-system coredns-74586cf9b6-hgtf7 1/1 Running 0 15h 10.10.219.67 master <none> <none>
kube-system etcd-master 1/1 Running 1 (91m ago) 15h 10.1.1.10 master <none> <none>
kube-system kube-apiserver-master 1/1 Running 1 (91m ago) 15h 10.1.1.10 master <none> <none>
kube-system kube-controller-manager-master 1/1 Running 1 (91m ago) 15h 10.1.1.10 master <none> <none>
kube-system kube-proxy-mq7b9 1/1 Running 1 (91m ago) 15h 10.1.1.11 node1 <none> <none>
kube-system kube-proxy-wwr6d 1/1 Running 1 (91m ago) 15h 10.1.1.10 master <none> <none>
kube-system kube-scheduler-master 1/1 Running 1 (91m ago) 15h 10.1.1.10 master <none> <none>
kubernetes-dashboard dashboard-metrics-scraper-7bfdf779ff-pbnzr 1/1 Running 0 18m 10.10.166.131 node1 <none> <none>
kubernetes-dashboard kubernetes-dashboard-6465b7f54c-wtmf2 1/1 Running 0 18m 10.10.166.132 node1 <none> <none>
查看面板 https://10.1.1.11:31132
创建访问账号
tee ./dash.yaml <<'EOF'
apiVersion: v1
kind: ServiceAccount
metadata:
name: admin-user
namespace: kubernetes-dashboard
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: admin-user
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: cluster-admin
subjects:
- kind: ServiceAccount
name: admin-user
namespace: kubernetes-dashboard
EOF
kubectl apply -f dash.yaml
# serviceaccount/admin-user created
# clusterrolebinding.rbac.authorization.k8s.io/admin-user created
获取访问令牌
用户创建参考
相关报错参考
[root@master ~]# kubectl -n kubernetes-dashboard create token admin-user
eyJhbGciOiJSUzI1NiIsImtpZCI6Im5HTDhEcGZlcjFoR2N0eTJ6cGdVTzJ6M3pLUFZlRWR4SnluT0VEcWNLV1kifQ.eyJhdWQiOlsiaHR0cHM6Ly9rdWJlcm5ldGVzLmRlZmF1bHQuc3ZjLmNsdXN0ZXIubG9jYWwiXSwiZXhwIjoxNjYxMzI1NjA4LCJpYXQiOjE2NjEzMjIwMDgsImlzcyI6Imh0dHBzOi8va3ViZXJuZXRlcy5kZWZhdWx0LnN2Yy5jbHVzdGVyLmxvY2FsIiwia3ViZXJuZXRlcy5pbyI6eyJuYW1lc3BhY2UiOiJrdWJlcm5ldGVzLWRhc2hib2FyZCIsInNlcnZpY2VhY2NvdW50Ijp7Im5hbWUiOiJhZG1pbi11c2VyIiwidWlkIjoiOGY1ZDA4MzItZWFiYy00MjhiLWE2ZmYtOTcyMGRjN2Y3NDQ3In19LCJuYmYiOjE2NjEzMjIwMDgsInN1YiI6InN5c3RlbTpzZXJ2aWNlYWNjb3VudDprdWJlcm5ldGVzLWRhc2hib2FyZDphZG1pbi11c2VyIn0.S2V1A8HkWLzHVA5lKmG1Ib1R7xfzWTZj7VyHOUy_aqmDeU2089t9bmXZENje2oJSzPNasWAGt6C9pI-V4M9pElLvEYRZ6yDZIndMFu4ioGILqoKrvuhI-Kyakx6r-cijmRQy3B5Uzh9l3GtZzf9xv5DuPvjauPcOhRKW6euejMH5oJEZfX-8Ng87ZzwT__r6m-6DDzybAsBlefWVtDzSuwcC1yj3pMK54ohLC8J_qZ8BEq67atHafX2XGD3wXedwMB1W0I6Yb0Jb4O3mU6wPTKuadKI5eoxxQ-qXhpK4d13N3IHDQG69gDhkfdeaA_kpA0cvkFkkrq6AnHUGaYkVlg
黏贴访问
- 12、nginx安装测试
kubectl create deployment nginx --image=nginx
watch -n 3 kubectl get pods -A -o wide
暴露端口
[root@master ~]# kubectl expose deployment nginx --port=80 --type=NodePort
service/nginx exposed
[root@master ~]# kubectl get pods,svc
NAME READY STATUS RESTARTS AGE
pod/nginx-76d6c9b8c-5xwm8 1/1 Running 0 2m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 56m
service/nginx NodePort 10.97.190.10 <none> 80:30856/TCP 7s
访问
http://10.1.1.10:30856/
http://10.1.1.11:30856/
其他
metrics-server
ipvs开启
ingress-nginx的安装
nfs搭建
注意k8s证书的过期
证书更新参考
[root@master ~]# openssl x509 -in /etc/kubernetes/pki/apiserver.crt -noout -text |grep ' Not '
Not Before: Aug 23 11:37:27 2022 GMT
Not After : Aug 23 11:37:27 2023 GMT
查看部署完毕的集群网卡，iptables，路由，内核
[root@node1 ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:0c:29:6d:1b:ff brd ff:ff:ff:ff:ff:ff
inet 10.1.1.11/24 brd 10.1.1.255 scope global noprefixroute ens33
valid_lft forever preferred_lft forever
inet6 fe80::8ae3:1458:f8a8:e3a3/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: tunl0@NONE: <NOARP,UP,LOWER_UP> mtu 1480 qdisc noqueue state UNKNOWN group default qlen 1000
link/ipip 0.0.0.0 brd 0.0.0.0
inet 10.10.166.128/32 scope global tunl0
valid_lft forever preferred_lft forever
[root@node1 ~]# iptables -S
-P INPUT ACCEPT
-P FORWARD ACCEPT
-P OUTPUT ACCEPT
-N KUBE-EXTERNAL-SERVICES
-N KUBE-FIREWALL
-N KUBE-FORWARD
-N KUBE-KUBELET-CANARY
-N KUBE-NODEPORTS
-N KUBE-PROXY-CANARY
-N KUBE-SERVICES
-N cali-FORWARD
-N cali-INPUT
-N cali-OUTPUT
-N cali-cidr-block
-N cali-from-hep-forward
-N cali-from-host-endpoint
-N cali-from-wl-dispatch
-N cali-to-hep-forward
-N cali-to-host-endpoint
-N cali-to-wl-dispatch
-N cali-wl-to-host
-A INPUT -m comment --comment "cali:Cz_u1IQiXIMmKD4c" -j cali-INPUT
-A INPUT -m comment --comment "kubernetes health check service ports" -j KUBE-NODEPORTS
-A INPUT -m conntrack --ctstate NEW -m comment --comment "kubernetes externally-visible service portals" -j KUBE-EXTERNAL-SERVICES
-A INPUT -j KUBE-FIREWALL
-A FORWARD -m comment --comment "cali:wUHhoiAYhphO9Mso" -j cali-FORWARD
-A FORWARD -m comment --comment "kubernetes forwarding rules" -j KUBE-FORWARD
-A FORWARD -m conntrack --ctstate NEW -m comment --comment "kubernetes service portals" -j KUBE-SERVICES
-A FORWARD -m conntrack --ctstate NEW -m comment --comment "kubernetes externally-visible service portals" -j KUBE-EXTERNAL-SERVICES
-A FORWARD -m comment --comment "cali:S93hcgKJrXEqnTfs" -m comment --comment "Policy explicitly accepted packet." -m mark --mark 0x10000/0x10000 -j ACCEPT
-A FORWARD -m comment --comment "cali:mp77cMpurHhyjLrM" -j MARK --set-xmark 0x10000/0x10000
-A OUTPUT -m comment --comment "cali:tVnHkvAo15HuiPy0" -j cali-OUTPUT
-A OUTPUT -m conntrack --ctstate NEW -m comment --comment "kubernetes service portals" -j KUBE-SERVICES
-A OUTPUT -j KUBE-FIREWALL
-A KUBE-FIREWALL -m comment --comment "kubernetes firewall for dropping marked packets" -m mark --mark 0x8000/0x8000 -j DROP
-A KUBE-FIREWALL ! -s 127.0.0.0/8 -d 127.0.0.0/8 -m comment --comment "block incoming localnet connections" -m conntrack ! --ctstate RELATED,ESTABLISHED,DNAT -j DROP
-A KUBE-FORWARD -m conntrack --ctstate INVALID -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding conntrack rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A cali-FORWARD -m comment --comment "cali:vjrMJCRpqwy5oRoX" -j MARK --set-xmark 0x0/0xe0000
-A cali-FORWARD -m comment --comment "cali:A_sPAO0mcxbT9mOV" -m mark --mark 0x0/0x10000 -j cali-from-hep-forward
-A cali-FORWARD -i cali+ -m comment --comment "cali:8ZoYfO5HKXWbB3pk" -j cali-from-wl-dispatch
-A cali-FORWARD -o cali+ -m comment --comment "cali:jdEuaPBe14V2hutn" -j cali-to-wl-dispatch
-A cali-FORWARD -m comment --comment "cali:12bc6HljsMKsmfr-" -j cali-to-hep-forward
-A cali-FORWARD -m comment --comment "cali:NOSxoaGx8OIstr1z" -j cali-cidr-block
-A cali-INPUT -p ipv4 -m comment --comment "cali:PajejrV4aFdkZojI" -m comment --comment "Allow IPIP packets from Calico hosts" -m set --match-set cali40all-hosts-net src -m addrtype --dst-type LOCAL -j ACCEPT
-A cali-INPUT -p ipv4 -m comment --comment "cali:_wjq-Yrma8Ly1Svo" -m comment --comment "Drop IPIP packets from non-Calico hosts" -j DROP
-A cali-INPUT -i cali+ -m comment --comment "cali:8TZGxLWh_Eiz66wc" -g cali-wl-to-host
-A cali-INPUT -m comment --comment "cali:6McIeIDvPdL6PE1T" -m mark --mark 0x10000/0x10000 -j ACCEPT
-A cali-INPUT -m comment --comment "cali:YGPbrUms7NId8xVa" -j MARK --set-xmark 0x0/0xf0000
-A cali-INPUT -m comment --comment "cali:2gmY7Bg2i0i84Wk_" -j cali-from-host-endpoint
-A cali-INPUT -m comment --comment "cali:q-Vz2ZT9iGE331LL" -m comment --comment "Host endpoint policy accepted packet." -m mark --mark 0x10000/0x10000 -j ACCEPT
-A cali-OUTPUT -m comment --comment "cali:Mq1_rAdXXH3YkrzW" -m mark --mark 0x10000/0x10000 -j ACCEPT
-A cali-OUTPUT -o cali+ -m comment --comment "cali:69FkRTJDvD5Vu6Vl" -j RETURN
-A cali-OUTPUT -p ipv4 -m comment --comment "cali:AnEsmO6bDZbQntWW" -m comment --comment "Allow IPIP packets to other Calico hosts" -m set --match-set cali40all-hosts-net dst -m addrtype --src-type LOCAL -j ACCEPT
-A cali-OUTPUT -m comment --comment "cali:9e9Uf3GU5tX--Lxy" -j MARK --set-xmark 0x0/0xf0000
-A cali-OUTPUT -m comment --comment "cali:0f3LDz_VKuHFaA2K" -m conntrack ! --ctstate DNAT -j cali-to-host-endpoint
-A cali-OUTPUT -m comment --comment "cali:OgU2f8BVEAZ_fwkq" -m comment --comment "Host endpoint policy accepted packet." -m mark --mark 0x10000/0x10000 -j ACCEPT
-A cali-from-wl-dispatch -m comment --comment "cali:zTj6P0TIgYvgz-md" -m comment --comment "Unknown interface" -j DROP
-A cali-to-wl-dispatch -m comment --comment "cali:7KNphB1nNHw80nIO" -m comment --comment "Unknown interface" -j DROP
-A cali-wl-to-host -m comment --comment "cali:Ee9Sbo10IpVujdIY" -j cali-from-wl-dispatch
-A cali-wl-to-host -m comment --comment "cali:nSZbcOoG1xPONxb8" -m comment --comment "Configured DefaultEndpointToHostAction" -j ACCEPT
[root@node1 ~]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.1.1.2 0.0.0.0 UG 100 0 0 ens33
10.1.1.0 0.0.0.0 255.255.255.0 U 100 0 0 ens33
10.10.166.128 0.0.0.0 255.255.255.192 U 0 0 0 *
10.10.219.64 10.1.1.10 255.255.255.192 UG 0 0 0 tunl0
[root@node1 ~]# sysctl -a | grep net.ipv4.ip_forward
net.ipv4.ip_forward = 1
net.ipv4.ip_forward_use_pmtu = 0
sysctl: reading key "net.ipv6.conf.all.stable_secret"
sysctl: reading key "net.ipv6.conf.default.stable_secret"
sysctl: reading key "net.ipv6.conf.ens33.stable_secret"
sysctl: reading key "net.ipv6.conf.lo.stable_secret"
sysctl: reading key "net.ipv6.conf.tunl0.stable_secret"
基于之前的第三步ipvs设置将k8s切换为ipvs转发模式
参考
master上修改模式
# kubectl -n kube-system edit cm kube-proxy
# 修改
metricsBindAddress: "127.0.0.1:10249"
mode: 'ipvs'
将master上原来的kube-proxy删除
kubectl -n kube-system get pod -l k8s-app=kube-proxy | grep -v 'NAME' | awk '{print $1}' | xargs kubectl -n kube-system delete pod
master和node上同时运行处理防火墙文章来源：https://www.toymoban.com/news/detail-483786.html
实际上iptables依然会生成规则
iptables-save>./iptables.`date +%F`
iptables -t filter -F
iptables -t filter -X
iptables -t nat -F
iptables -t nat -X
iptables -S
iptables -S -t nat
测试文章来源地址https://www.toymoban.com/news/detail-483786.html
kubectl run busybox --image busybox:1.28 --restart=Never --rm -it busybox -- sh
ping www.baidu.com
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