删除集群
#从work节点开始每个节点都执行重置命令,执行后最好执行重启命令,清除集群的内核配置和IPtables,ipvs
kubeadm reset --cri-socket unix:///run/cri-dockerd.sock && rm -rf /etc/kubernetes/ /var/lib/kubelet /var/lib/dockershim /var/run/kubernetes /var/lib/cni /etc/cni/net.d重建集群应用calico网络插件
[root@k8s-Master-01 data]#curl https://raw.githubusercontent.com/projectcalico/calico/v3.24.4/manifests/calico.yaml -O
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 229k 100 229k 0 0 82206 0 0:00:02 0:00:02 --:--:-- 82177
[root@k8s-Master-01 data]#ll
总用量 248
drwxr-xr-x 4 root root 4096 11月 8 21:01 ./
drwxr-xr-x 19 root root 4096 11月 8 20:04 ../
-rw-r--r-- 1 root root 235192 11月 8 21:01 calico.yaml
drwxr-xr-x 3 root root 4096 11月 8 20:32 Kubernetes_Advanced_Practical/
drwxr-xr-x 9 root root 4096 11月 8 20:06 learning-k8s/
[root@k8s-Master-01 data]#kubeadm init --control-plane-endpoint="kubeapi.shuhong.com" --kubernetes-version=v1.25.3 --pod-network-cidr=192.168.0.0/16 --service-cidr=10.96.0.0/12 --token-ttl=0 --cri-socket unix:///run/cri-dockerd.sock --upload-certs --image-repository=registry.aliyuncs.com/google_containers
[init] Using Kubernetes version: v1.25.3
[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 [k8s-master-01 kubeapi.shuhong.com kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 10.0.0.201]
[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 [k8s-master-01 localhost] and IPs [10.0.0.201 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [k8s-master-01 localhost] and IPs [10.0.0.201 127.0.0.1 ::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 12.020807 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:
ecd4b52e56aeda1b309f1bdc068fcccb86e78a3a18bf62d6177ac20579c59a87
[mark-control-plane] Marking the node k8s-master-01 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 k8s-master-01 as control-plane by adding the taints [node-role.kubernetes.io/control-plane:NoSchedule]
[bootstrap-token] Using token: m3yome.ec57pkfl2rbrz3c3
[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/
You can now join any number of the control-plane node running the following command on each as root:
kubeadm join kubeapi.shuhong.com:6443 --token m3yome.ec57pkfl2rbrz3c3 \
--discovery-token-ca-cert-hash sha256:9dce5184d61a7b6a83c0806138a1a90343f529d49e2db841baf31b3945b827b0 \
--control-plane --certificate-key ecd4b52e56aeda1b309f1bdc068fcccb86e78a3a18bf62d6177ac20579c59a87
Please note that the certificate-key gives access to cluster sensitive data, keep it secret!
As a safeguard, uploaded-certs will be deleted in two hours; If necessary, you can use
"kubeadm init phase upload-certs --upload-certs" to reload certs afterward.
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join kubeapi.shuhong.com:6443 --token m3yome.ec57pkfl2rbrz3c3 \
--discovery-token-ca-cert-hash sha256:9dce5184d61a7b6a83c0806138a1a90343f529d49e2db841baf31b3945b827b0
[root@k8s-Master-01 data]#cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[root@k8s-Master-01 data]#vim calico.yaml
....
- name: CALICO_IPV4POOL_IPIP
value: "Cross-Subnet"
- name: CALICO_IPV4POOL_BLOCK_SIZE
value: "24"
....
[root@k8s-Master-01 data]#kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master-01 NotReady control-plane 8m24s v1.25.3
[root@k8s-Master-01 data]#kubectl apply -f calico.yaml
poddisruptionbudget.policy/calico-kube-controllers created
serviceaccount/calico-kube-controllers created
serviceaccount/calico-node created
configmap/calico-config created
customresourcedefinition.apiextensions.k8s.io/bgpconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/bgppeers.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/blockaffinities.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/caliconodestatuses.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/clusterinformations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/felixconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/globalnetworksets.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/hostendpoints.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamblocks.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamconfigs.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipamhandles.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ippools.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/ipreservations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/kubecontrollersconfigurations.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networkpolicies.crd.projectcalico.org created
customresourcedefinition.apiextensions.k8s.io/networksets.crd.projectcalico.org created
clusterrole.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrole.rbac.authorization.k8s.io/calico-node created
clusterrolebinding.rbac.authorization.k8s.io/calico-kube-controllers created
clusterrolebinding.rbac.authorization.k8s.io/calico-node created
daemonset.apps/calico-node created
deployment.apps/calico-kube-controllers created
[root@k8s-Master-01 data]#kubectl get ns
NAME STATUS AGE
default Active 8m57s
kube-node-lease Active 8m59s
kube-public Active 8m59s
kube-system Active 9m
[root@k8s-Master-01 data]#kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
calico-kube-controllers-f79f7749d-7pqxz 0/1 ContainerCreating 0 99s
calico-node-wmdns 0/1 Init:2/3 0 99s
coredns-c676cc86f-77qwc 0/1 ContainerCreating 0 9m58s
coredns-c676cc86f-gcqlt 0/1 ContainerCreating 0 9m58s
etcd-k8s-master-01 1/1 Running 0 10m
kube-apiserver-k8s-master-01 1/1 Running 0 10m
kube-controller-manager-k8s-master-01 1/1 Running 0 10m
kube-proxy-f9rc5 1/1 Running 0 9m58s
kube-scheduler-k8s-master-01 1/1 Running 0 10m
#增加master节点
kubeadm join kubeapi.shuhong.com:6443 --token levsg3.xuj3v9wkgl9362us --discovery-token-ca-cert-hash sha256:7b214afe4dc7cfb13f74e8dcac9c76cbeea278800b19d21a2692389622b5470e --control-plane --certificate-key 1e3268422d15d44b87e35ef32ba8d4f5b912f59d25e06bedb3e8c10d961c4c34 --cri-socket unix:///run/cri-dockerd.sock
#增加node节点
kubeadm join kubeapi.shuhong.com:6443 --token levsg3.xuj3v9wkgl9362us --discovery-token-ca-cert-hash sha256:7b214afe4dc7cfb13f74e8dcac9c76cbeea278800b19d21a2692389622b5470e --cri-socket unix:///run/cri-dockerd.sock
[root@k8s-Master-01 ~]#kubectl get nodes
NAME STATUS ROLES AGE VERSION
k8s-master-01 Ready control-plane 9m33s v1.25.3
k8s-master-02 Ready control-plane 4m35s v1.25.3
k8s-master-03 Ready control-plane 4m27s v1.25.3
k8s-node-01 Ready <none> 2m13s v1.25.3
k8s-node-02 Ready <none> 105s v1.25.3
k8s-node-03 Ready <none> 103s v1.25.3
在node节点部署nginx,用四层负载均衡指向三个master节点,实现master的高可用
[root@k8s-Ansible ansible]#vim install_nginx.yml
---
- name: install nginx
hosts: Node
tasks:
- name: apt
apt:
name: nginx
state: present
- name: copy
copy:
src: kubeapi.shuhong.com.conf
dest: /etc/nginx/conf.d/kubeapi.shuhong.com.conf
- name: service
service:
name: nginx
state: restarted
enabled: yes
[root@k8s-Ansible ansible]#ansible-playbook install_nginx.yml
PLAY [install nginx] ****************************************************************************************************************************************************************************************************************
TASK [Gathering Facts] **************************************************************************************************************************************************************************************************************
ok: [10.0.0.205]
ok: [10.0.0.204]
ok: [10.0.0.206]
TASK [apt] **************************************************************************************************************************************************************************************************************************
ok: [10.0.0.206]
ok: [10.0.0.205]
ok: [10.0.0.204]
TASK [copy] *************************************************************************************************************************************************************************************************************************
ok: [10.0.0.206]
ok: [10.0.0.204]
ok: [10.0.0.205]
TASK [service] **********************************************************************************************************************************************************************************************************************
changed: [10.0.0.204]
changed: [10.0.0.206]
changed: [10.0.0.205]
PLAY RECAP **************************************************************************************************************************************************************************************************************************
10.0.0.204 : ok=4 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
10.0.0.205 : ok=4 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
10.0.0.206 : ok=4 changed=1 unreachable=0 failed=0 skipped=0 rescued=0 ignored=0
#修改个结点的hosts均只想自己ip
[root@k8s-Master-01 ~]#vim /etc/hosts
10.0.0.201 k8s-Master-01 kubeapi.shuhong.com
10.0.0.202 k8s-Master-02
10.0.0.203 k8s-Master-03
10.0.0.204 k8s-Node-01
10.0.0.205 k8s-Node-02
10.0.0.206 k8s-Node-03
10.0.0.207 k8s-Ansible
[root@k8s-Master-02 ~]#vim /etc/hosts
10.0.0.201 k8s-Master-01
10.0.0.202 k8s-Master-02 kubeapi.shuhong.com
10.0.0.203 k8s-Master-03
10.0.0.204 k8s-Node-01
10.0.0.205 k8s-Node-02
10.0.0.206 k8s-Node-03
10.0.0.207 k8s-Ansible
[root@k8s-Master-03 ~]#vim /etc/hosts
10.0.0.201 k8s-Master-01
10.0.0.202 k8s-Master-02
10.0.0.203 k8s-Master-03 kubeapi.shuhong.com
10.0.0.204 k8s-Node-01
10.0.0.205 k8s-Node-02
10.0.0.206 k8s-Node-03
10.0.0.207 k8s-Ansible
[root@k8s-Node-01 ~]#vim /etc/hosts
10.0.0.201 k8s-Master-01
10.0.0.202 k8s-Master-02
10.0.0.203 k8s-Master-03
10.0.0.204 k8s-Node-01 kubeapi.shuhong.com
10.0.0.205 k8s-Node-02
10.0.0.206 k8s-Node-03
10.0.0.207 k8s-Ansible
[root@k8s-Node-02 ~]#vim /etc/hosts
10.0.0.201 k8s-Master-01
10.0.0.202 k8s-Master-02
10.0.0.203 k8s-Master-03
10.0.0.204 k8s-Node-01
10.0.0.205 k8s-Node-02 kubeapi.shuhong.com
10.0.0.206 k8s-Node-03
10.0.0.207 k8s-Ansible
[root@k8s-Node-03 ~]#vim /etc/hosts
10.0.0.201 k8s-Master-01
10.0.0.202 k8s-Master-02
10.0.0.203 k8s-Master-03
10.0.0.204 k8s-Node-01
10.0.0.205 k8s-Node-02
10.0.0.206 k8s-Node-03 kubeapi.shuhong.com
10.0.0.207 k8s-Ansible
#测试
[root@k8s-Node-03 ~]#curl kubeapi.shuhong.com
{
"kind": "Status",
"apiVersion": "v1",
"metadata": {},
"status": "Failure",
"message": "forbidden: User \"system:anonymous\" cannot get path \"/\"",
"reason": "Forbidden",
"details": {},
"code": 403
}
[root@k8s-Master-03 ~]#curl https://kubeapi.shuhong.com:6443 -k
{
"kind": "Status",
"apiVersion": "v1",
"metadata": {},
"status": "Failure",
"message": "forbidden: User \"system:anonymous\" cannot get path \"/\"",
"reason": "Forbidden",
"details": {},
"code": 403
}
#测试运行pod
[root@k8s-Master-01 ~]#cd /data/learning-k8s/wordpress/
[root@k8s-Master-01 wordpress]#ls
mysql mysql-ephemeral nginx README.md wordpress wordpress-apache-ephemeral
[root@k8s-Master-01 wordpress]#kubectl apply -f mysql-ephemeral
secret/mysql-user-pass created
service/mysql created
deployment.apps/mysql created
[root@k8s-Master-01 wordpress]#kubectl apply -f wordpress-apache-ephemeral
service/wordpress created
deployment.apps/wordpress created
[root@k8s-Master-01 wordpress]#kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 11h
mysql ClusterIP 10.96.146.190 <none> 3306/TCP 5m3s
wordpress NodePort 10.106.224.35 <none> 80:31021/TCP 4m37s
[root@k8s-Master-01 wordpress]#kubectl get pods -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
mysql-787575d954-sk8s8 1/1 Running 0 6m23s 192.168.204.1 k8s-node-03 <none> <none>
wordpress-6c854887c8-p8snx 1/1 Running 0 5m58s 192.168.127.1 k8s-node-01 <none> <none>
指令式命令：管理的目标的对象的操作和配置，通过命令行选项进行指定
创建demoapp
[root@k8s-Master-01 wordpress]#kubectl create ns demo
[root@k8s-Master-01 wordpress]#kubectl get ns
NAME STATUS AGE
default Active 12h
demo Active 6m5s
kube-node-lease Active 12h
kube-public Active 12h
kube-system Active 12h
[root@k8s-Master-01 wordpress]#kubectl create deployment demoapp --image=ikubernetes/demoapp:v1.0 --replicas=2 -n demo
deployment.apps/demoapp created
[root@k8s-Master-01 wordpress]#kubectl get pods -n demo
NAME READY STATUS RESTARTS AGE
demoapp-55c5f88dcb-drs6d 1/1 Running 0 112s
demoapp-55c5f88dcb-lfv6c 1/1 Running 0 112s
[root@k8s-Master-01 wordpress]#kubectl describe pods -n demo demoapp-55c5f88dcb-drs6d
Name: demoapp-55c5f88dcb-drs6d
Namespace: demo
Priority: 0
Service Account: default
Node: k8s-node-03/10.0.0.206
Start Time: Wed, 09 Nov 2022 09:33:17 +0800
Labels: app=demoapp
pod-template-hash=55c5f88dcb
Annotations: cni.projectcalico.org/containerID: 118e53a64d8e91af67172457a4fde12b7c82fe66cfa12659f34816369de07552
cni.projectcalico.org/podIP: 192.168.204.10/32
cni.projectcalico.org/podIPs: 192.168.204.10/32
Status: Running
IP: 192.168.204.10
IPs:
IP: 192.168.204.10
Controlled By: ReplicaSet/demoapp-55c5f88dcb
Containers:
demoapp:
Container ID: docker://dc6be64cb2766c1ebc4186331cf4a976acc89c5592e027238716d97b72cf0dcc
Image: ikubernetes/demoapp:v1.0
Image ID: docker-pullable://ikubernetes/demoapp@sha256:6698b205eb18fb0171398927f3a35fe27676c6bf5757ef57a35a4b055badf2c3
Port: <none>
Host Port: <none>
State: Running
Started: Wed, 09 Nov 2022 09:33:54 +0800
Ready: True
Restart Count: 0
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-wdkpt (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
kube-api-access-wdkpt:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional: <nil>
DownwardAPI: true
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 115s default-scheduler Successfully assigned demo/demoapp-55c5f88dcb-drs6d to k8s-node-03
Normal Pulling 111s kubelet Pulling image "ikubernetes/demoapp:v1.0"
Normal Pulled 80s kubelet Successfully pulled image "ikubernetes/demoapp:v1.0" in 31.012550745s
Normal Created 79s kubelet Created container demoapp
Normal Started 78s kubelet Started container demoapp
[root@k8s-Master-01 wordpress]#kubectl create svc nodeport demoapp --tcp=80:80 -n demo
service/demoapp created
[root@k8s-Master-01 wordpress]#kubectl get svc -n demo
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
demoapp NodePort 10.104.230.57 <none> 80:32462/TCP 8s
[root@k8s-Master-01 wordpress]#curl 10.104.230.57
iKubernetes demoapp v1.0 !! ClientIP: 10.0.0.201, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
[root@k8s-Node-03 ~]#curl 10.104.230.57
iKubernetes demoapp v1.0 !! ClientIP: 10.0.0.206, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
创建客户端访问
Service：
对于每个Service来说，CoreDNS会自动为其生成可用于解析的资源记录
A, PTR, SRV
service_name.namespace.svc.cluster.local A ClusterIP
[root@k8s-Master-02 ~]#kubectl get svc -n demo
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
demoapp NodePort 10.104.230.57 <none> 80:32462/TCP 17m
#创建一个专用的交互式测试客户端：
[root@k8s-Master-01 wordpress]#kubectl run client-$RANDOM --image=ikubernetes/admin-box:v1.2 --restart=Never -it --rm --command -- /bin/bash
If you don't see a command prompt, try pressing enter.
root@client-25427 /#
[root@k8s-Master-02 ~]#kubectl get pods
NAME READY STATUS RESTARTS AGE
client-25427 1/1 Running 0 7m13s
mysql-787575d954-sk8s8 1/1 Running 0 35m
wordpress-6c854887c8-p8snx 1/1 Running 0 34m
root@client-25427 /# curl 10.104.230.57
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
root@client-25427 /# curl 10.104.230.57
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
root@client-25427 /# curl 10.104.230.57
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
root@client-25427 /# curl 10.104.230.57
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
root@client-25427 /# curl 10.104.230.57
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
root@client-25427 /# curl demoapp.demo
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
root@client-25427 /# curl demoapp.demo
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
root@client-25427 /# curl demoapp.demo
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
root@client-25427 /# curl demoapp.demo
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
root@client-25427 /# curl demoapp.demo
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
root@client-25427 /# host -t A demoapp.demo
demoapp.demo.svc.cluster.local has address 10.104.230.57
动态扩缩容
#动态扩缩容
root@client-25427 /# while true; do curl demoapp.demo;sleep 1 ;done
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
....
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-tb6c5, ServerIP: 192.168.127.4!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-tb6c5, ServerIP: 192.168.127.4!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
....
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-lfv6c, ServerIP: 192.168.8.9!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
...
[root@k8s-Master-02 ~]# kubectl scale deployment/demoapp --replicas=3 -n demo
deployment.apps/demoapp scaled
[root@k8s-Master-02 ~]#kubectl get pods -n demo -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
demoapp-55c5f88dcb-drs6d 1/1 Running 0 28m 192.168.204.10 k8s-node-03 <none> <none>
demoapp-55c5f88dcb-lfv6c 1/1 Running 0 28m 192.168.8.9 k8s-node-02 <none> <none>
demoapp-55c5f88dcb-tb6c5 1/1 Running 0 84s 192.168.127.4 k8s-node-01 <none> <none>
[root@k8s-Master-02 ~]#kubectl scale deployment/demoapp --replicas=2 -n demo
deployment.apps/demoapp scaled
[root@k8s-Master-02 ~]#kubectl get pods -n demo -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
demoapp-55c5f88dcb-drs6d 1/1 Running 0 29m 192.168.204.10 k8s-node-03 <none> <none>
demoapp-55c5f88dcb-lfv6c 1/1 Running 0 29m 192.168.8.9 k8s-node-02 <none> <none>滚动升级和回滚
#升级
kubectl set image (-f FILENAME | TYPE NAME) CONTAINER_NAME_1=CONTAINER_IMAGE_1 ... CONTAINER_NAME_N=CONTAINER_IMAGE_N
[root@k8s-Master-02 ~]#kubectl get pods -n demo -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
demoapp-55c5f88dcb-drs6d 1/1 Running 0 32m 192.168.204.10 k8s-node-03 <none> <none>
demoapp-55c5f88dcb-lfv6c 1/1 Running 0 32m 192.168.8.9 k8s-node-02 <none> <none>
[root@k8s-Master-02 ~]#kubectl describe pods -n demo demoapp-55c5f88dcb-drs6d
Name: demoapp-55c5f88dcb-drs6d
Namespace: demo
Priority: 0
Service Account: default
Node: k8s-node-03/10.0.0.206
Start Time: Wed, 09 Nov 2022 09:33:17 +0800
Labels: app=demoapp
pod-template-hash=55c5f88dcb
Annotations: cni.projectcalico.org/containerID: 118e53a64d8e91af67172457a4fde12b7c82fe66cfa12659f34816369de07552
cni.projectcalico.org/podIP: 192.168.204.10/32
cni.projectcalico.org/podIPs: 192.168.204.10/32
Status: Running
IP: 192.168.204.10
IPs:
IP: 192.168.204.10
Controlled By: ReplicaSet/demoapp-55c5f88dcb
Containers:
demoapp:
Container ID: docker://dc6be64cb2766c1ebc4186331cf4a976acc89c5592e027238716d97b72cf0dcc
Image: ikubernetes/demoapp:v1.0
Image ID: docker-pullable://ikubernetes/demoapp@sha256:6698b205eb18fb0171398927f3a35fe27676c6bf5757ef57a35a4b055badf2c3
Port: <none>
Host Port: <none>
State: Running
Started: Wed, 09 Nov 2022 09:33:54 +0800
Ready: True
Restart Count: 0
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-wdkpt (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
kube-api-access-wdkpt:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional: <nil>
DownwardAPI: true
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 33m default-scheduler Successfully assigned demo/demoapp-55c5f88dcb-drs6d to k8s-node-03
Normal Pulling 33m kubelet Pulling image "ikubernetes/demoapp:v1.0"
Normal Pulled 32m kubelet Successfully pulled image "ikubernetes/demoapp:v1.0" in 31.012550745s
Normal Created 32m kubelet Created container demoapp
Normal Started 32m kubelet Started container demoapp
[root@k8s-Master-02 ~]#kubectl set image deployment demoapp demoapp=ikubernetes/demoapp:v1.1 -n demo
deployment.apps/demoapp image updated
[root@k8s-Master-02 ~]#kubectl get pods -n demo -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
demoapp-55c5f88dcb-drs6d 1/1 Running 0 35m 192.168.204.10 k8s-node-03 <none> <none>
demoapp-55c5f88dcb-lfv6c 1/1 Running 0 35m 192.168.8.9 k8s-node-02 <none> <none>
demoapp-69f8964965-wfqjg 0/1 ContainerCreating 0 12s <none> k8s-node-01 <none> <none>
[root@k8s-Master-02 ~]#kubectl describe pods -n demo demoapp-69f8964965-wfqjg
Name: demoapp-69f8964965-wfqjg
Namespace: demo
Priority: 0
Service Account: default
Node: k8s-node-01/10.0.0.204
Start Time: Wed, 09 Nov 2022 10:08:06 +0800
Labels: app=demoapp
pod-template-hash=69f8964965
Annotations: cni.projectcalico.org/containerID: 742cc2c7f26301b4c93187199ae4f5ec4fca8bea1dcd1c621d19b61f1d7486ab
cni.projectcalico.org/podIP: 192.168.127.5/32
cni.projectcalico.org/podIPs: 192.168.127.5/32
Status: Pending
IP:
IPs: <none>
Controlled By: ReplicaSet/demoapp-69f8964965
Containers:
demoapp:
Container ID:
Image: ikubernetes/demoapp:v1.1
Image ID:
Port: <none>
Host Port: <none>
State: Waiting
Reason: ContainerCreating
Ready: False
Restart Count: 0
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-4sxfq (ro)
Conditions:
Type Status
Initialized True
Ready False
ContainersReady False
PodScheduled True
Volumes:
kube-api-access-4sxfq:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional: <nil>
DownwardAPI: true
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 26s default-scheduler Successfully assigned demo/demoapp-69f8964965-wfqjg to k8s-node-01
Normal Pulling 25s kubelet Pulling image "ikubernetes/demoapp:v1.1"
root@client-25427 /# while true; do curl demoapp.demo;sleep 1 ;done
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-drs6d, ServerIP: 192.168.204.10!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-r7tdd, ServerIP: 192.168.204.11!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-r7tdd, ServerIP: 192.168.204.11!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-r7tdd, ServerIP: 192.168.204.11!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-r7tdd, ServerIP: 192.168.204.11!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-wfqjg, ServerIP: 192.168.127.5!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-r7tdd, ServerIP: 192.168.204.11!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-r7tdd, ServerIP: 192.168.204.11!
iKubernetes demoapp v1.1 !! ClientIP: 192.168.8.10, ServerName: demoapp-69f8964965-r7tdd, ServerIP: 192.168.204.11!
[root@k8s-Master-02 ~]#kubectl get pods -n demo -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
demoapp-69f8964965-r7tdd 1/1 Running 0 85s 192.168.204.11 k8s-node-03 <none> <none>
demoapp-69f8964965-wfqjg 1/1 Running 0 2m6s 192.168.127.5 k8s-node-01 <none> <none>
#回滚
kubectl rollout history (TYPE NAME | TYPE/NAME) [flags] [options]
[root@k8s-Master-02 ~]#kubectl rollout history deployment demoapp -n demo
deployment.apps/demoapp
REVISION CHANGE-CAUSE
1 <none>
2 <none>
kubectl rollout undo (TYPE NAME | TYPE/NAME) [flags] [options]
[root@k8s-Master-02 ~]#kubectl rollout undo deployment demoapp -n demo
deployment.apps/demoapp rolled back
[root@k8s-Master-02 ~]#kubectl rollout undo deployment demoapp -n demo
deployment.apps/demoapp rolled back
[root@k8s-Master-02 ~]#kubectl get pods -n demo -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
demoapp-55c5f88dcb-cjlhc 1/1 Running 0 32s 192.168.8.11 k8s-node-02 <none> <none>
demoapp-55c5f88dcb-qdh6v 1/1 Running 0 25s 192.168.127.6 k8s-node-01 <none> <none>
demoapp-69f8964965-r7tdd 1/1 Terminating 0 6m6s 192.168.204.11 k8s-node-03 <none> <none>
demoapp-69f8964965-wfqjg 1/1 Terminating 0 6m47s 192.168.127.5 k8s-node-01 <none> <none>
root@client-25427 /# while true; do curl demoapp.demo;sleep 1 ;done
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-cjlhc, ServerIP: 192.168.8.11!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-cjlhc, ServerIP: 192.168.8.11!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-cjlhc, ServerIP: 192.168.8.11!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-cjlhc, ServerIP: 192.168.8.11!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-cjlhc, ServerIP: 192.168.8.11!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-cjlhc, ServerIP: 192.168.8.11!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
iKubernetes demoapp v1.0 !! ClientIP: 192.168.8.10, ServerName: demoapp-55c5f88dcb-qdh6v, ServerIP: 192.168.127.6!
[root@k8s-Master-02 ~]#kubectl get pods -n demo -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
demoapp-55c5f88dcb-cjlhc 1/1 Running 0 53s 192.168.8.11 k8s-node-02 <none> <none>
demoapp-55c5f88dcb-qdh6v 1/1 Running 0 46s 192.168.127.6 k8s-node-01 <none> <none>指令式对象配置：对象配置通过配置文件进行定义
#例如:
kubectl get -f nodes.yaml
kubectl delete -f nodes.yaml
[root@k8s-Master-01 wordpress]#kubectl get pods
NAME READY STATUS RESTARTS AGE
mysql-787575d954-sk8s8 1/1 Running 0 88m
wordpress-6c854887c8-p8snx 1/1 Running 0 87m
[root@k8s-Master-01 wordpress]#kubectl delete -f mysql-ephemeral/
secret "mysql-user-pass" deleted
service "mysql" deleted
deployment.apps "mysql" deleted
[root@k8s-Master-01 wordpress]#kubectl delete -f wordpress-apache-ephemeral/
service "wordpress" deleted
deployment.apps "wordpress" deleted
[root@k8s-Master-01 wordpress]#kubectl get pods
NAME READY STATUS RESTARTS AGE
wordpress-6c854887c8-p8snx 0/1 Terminating 0 88m
[root@k8s-Master-01 wordpress]#kubectl get pods
No resources found in default namespace.声明式对象配置：对象配置通过配置文件进行定义
手动编辑yaml文件部署wordpress
[root@k8s-Master-01 mysql]#kubectl create service clusterip mydb --tcp=3306:3306 --dry-run=client -o yaml > /data/test/mysql/01-service-mydb.yaml
[root@k8s-Master-01 mysql]#cat 01-service-mydb.yaml
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: mydb
name: mydb
spec:
ports:
- name: 3306-3306
port: 3306
protocol: TCP
targetPort: 3306
selector:
app: mydb
type: ClusterIP
status:
loadBalancer: {}
[root@k8s-Master-01 wordpress]#kubectl create service nodeport wordpress --tcp=80:80 --dry-run=client -o yaml > /data/test/wordpress/01-service-wordpress.yaml
[root@k8s-Master-01 wordpress]#cat 01-service-wordpress.yaml
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: wordpress
name: wordpress
spec:
ports:
- name: 80-80
port: 80
protocol: TCP
targetPort: 80
selector:
app: wordpress
type: NodePort
status:
loadBalancer: {}
[root@k8s-Master-01 test]#vim mysql/02-deploy-mydb.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: mydb
namespace: default
labels:
app: mydb
spec:
replicas: 1
selector:
matchLabels:
app: mydb
template:
metadata:
labels:
app: mydb
spec:
containers:
- name: mysql
image: mysql:8.0
env:
- name: MYSQL_RANDOM_ROOT_PASSWORD
value: "1"
- name: MYSQL_DATABASE
value: wpdb
- name: MYSQL_USER
value: wpuser
- name: MYSQL_PASSWORD
value: "123456"
[root@k8s-Master-01 test]#vim wordpress/02-deploy-wordpress.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: wordpress
namespace: default
labels:
app: wordpress
spec:
replicas: 1
selector:
matchLabels:
app: wordpress
template:
metadata:
labels:
app: wordpress
spec:
containers:
- name: wordpress
image: wordpress:5.7
env:
- name: WORDPRESS_DB_HOST
value: mydb
- name: WORDPRESS_DB_NAME
value: wpdb
- name: WORDPRESS_DB_USER
value: wpuser
- name: WORDPRESS_DB_PASSWORD
value: "123456"
[root@k8s-Master-01 test]#kubectl apply -f wordpress/
service/wordpress created
deployment.apps/wordpress created
[root@k8s-Master-01 test]#kubectl apply -f mysql/
service/mydb configured
deployment.apps/mydb created
[root@k8s-Master-01 test]#kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 13h
mydb ClusterIP 10.110.129.77 <none> 3306/TCP 20m
wordpress NodePort 10.109.147.168 <none> 80:32177/TCP 5m37s
[root@k8s-Master-01 test]#kubectl get pods
NAME READY STATUS RESTARTS AGE
mydb-57786547bd-hkzbn 1/1 Running 0 11m
wordpress-7c468fbc8d-9d784 1/1 Running 0 5m41s
配置健康探针
[root@k8s-Master-01 test]#kubectl get pods -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
mydb-5dccf4cbf7-2tmbw 1/1 Running 0 48m 192.168.204.29 k8s-node-03 <none> <none>
wordpress-579c794b44-rmctx 0/1 Running 0 65s 192.168.8.18 k8s-node-02 <none> <none>
[root@k8s-Master-01 test]#kubectl describe pods wordpress-579c794b44-rmctx
Name: wordpress-579c794b44-rmctx
Namespace: default
Priority: 0
Service Account: default
Node: k8s-node-02/10.0.0.205
Start Time: Wed, 09 Nov 2022 15:56:46 +0800
Labels: app=wordpress
pod-template-hash=579c794b44
Annotations: cni.projectcalico.org/containerID: a73bf090a8b0bd6727552b00ea52ec9ff5115990aeef71492274328e9aa4fea7
cni.projectcalico.org/podIP: 192.168.8.18/32
cni.projectcalico.org/podIPs: 192.168.8.18/32
Status: Running
IP: 192.168.8.18
IPs:
IP: 192.168.8.18
Controlled By: ReplicaSet/wordpress-579c794b44
Containers:
wordpress:
Container ID: docker://c30b46ed34b0bbf06fd194f505c3cf383b6feeef68ba55c64e4f78c39171af72
Image: wordpress:5.7
Image ID: docker-pullable://wordpress@sha256:37be4c1afbce8025ebaca553b70d9ce5d7ce4861a351e4bea42c36ee966b27bb
Port: <none>
Host Port: <none>
State: Running
Started: Wed, 09 Nov 2022 15:56:50 +0800
Ready: False
Restart Count: 0
Liveness: http-get http://:80/wp-admin/install.php delay=30s timeout=2s period=10s #success=1 #failure=3
Readiness: http-get http://:80/wp-login.php delay=60s timeout=2s period=10s #success=1 #failure=3
Startup: http-get http://:80/wp-admin/install.php delay=0s timeout=1s period=3s #success=1 #failure=3
Environment:
WORDPRESS_DB_HOST: mydb
WORDPRESS_DB_NAME: wpdb
WORDPRESS_DB_USER: wpuser
WORDPRESS_DB_PASSWORD: 123456
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-72v26 (ro)
Conditions:
Type Status
Initialized True
Ready False
ContainersReady False
PodScheduled True
Volumes:
kube-api-access-72v26:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional: <nil>
DownwardAPI: true
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 67s default-scheduler Successfully assigned default/wordpress-579c794b44-rmctx to k8s-node-02
Normal Pulled 63s kubelet Container image "wordpress:5.7" already present on machine
Normal Created 63s kubelet Created container wordpress
Normal Started 63s kubelet Started container wordpress
Warning Unhealthy 61s kubelet Startup probe failed: Get "http://192.168.8.18:80/wp-admin/install.php": dial tcp 192.168.8.18:80: connect: connection refused
Warning Unhealthy 57s kubelet Startup probe failed: Get "http://192.168.8.18:80/wp-admin/install.php": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
[root@k8s-Master-01 test]#kubectl get pods -owide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
mydb-5dccf4cbf7-2tmbw 1/1 Running 0 48m 192.168.204.29 k8s-node-03 <none> <none>
wordpress-579c794b44-rmctx 1/1 Running 0 73s 192.168.8.18 k8s-node-02 <none> <none>
[root@k8s-Master-01 test]#kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 18h
mydb ClusterIP 10.107.249.52 <none> 3306/TCP 49m
wordpress NodePort 10.102.151.208 <none> 80:30817/TCP 86s添加资源需求和资源限制
[root@k8s-Master-01 test]#vim mysql/02-deploy-mydb.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: mydb
namespace: default
labels:
app: mydb
spec:
replicas: 1
selector:
matchLabels:
app: mydb
template:
metadata:
labels:
app: mydb
spec:
containers:
- name: mysql
image: mysql:8.0
# ports:
# - name: tcp
# containerPort: 3306
# securityContext:
# capabilities:
# add:
# - NET_ADMIN
env:
- name: MYSQL_ROOT_PASSWORD
value: "123456"
- name: MYSQL_DATABASE
value: wpdb
- name: MYSQL_USER
value: wpuser
- name: MYSQL_PASSWORD
value: "123456"
resources:
requests:
memory: "128M"
cpu: "200m"
limits:
memory: "512M"
cpu: "400m"
# startupProbe:
# exec:
# command: ['/bin/sh','-c','[ "$(mysql -uroot -p123456 -e "show databases" > /dev/null && echo $?)" == "0" ] ']
# initialDelaySeconds: 0
# failureThreshold: 5
# periodSeconds: 3
# livenessProbe:
[root@k8s-Master-01 test]#vim wordpress/02-deploy-wordpress.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: wordpress
namespace: default
labels:
app: wordpress
spec:
replicas: 1
selector:
matchLabels:
app: wordpress
template:
metadata:
labels:
app: wordpress
spec:
containers:
- name: wordpress
image: wordpress:5.7
env:
- name: WORDPRESS_DB_HOST
value: mydb
- name: WORDPRESS_DB_NAME
value: wpdb
- name: WORDPRESS_DB_USER
value: wpuser
- name: WORDPRESS_DB_PASSWORD
value: "123456"
resources:
requests:
memory: "128M"
cpu: "200m"
limits:
memory: "512M"
cpu: "400m"
startupProbe:
exec:
command: ['/bin/bash','-c','[ $(find /var/www/html -name "wp-config.ph" >> /dev/null && echo $?) = 0 ]']
initialDelaySeconds:
failureThreshold: 10
periodSeconds: 3
# livenessProbe:
# httpGet:
# path: '/'
# port: 80
# scheme: HTTP
# initialDelaySeconds: 30
# timeoutSeconds: 2
# readinessProbe:
# httpGet:
# path: '/'
# port: 80
# scheme: HTTP
# initialDelaySeconds: 60
# timeoutSeconds: 2
