IT-SDK-Kubernetes-Basics - Revision history

Samerhijazi: /* Cluster */

2022-12-05T08:33:13Z

‎Cluster

Samerhijazi: /* Cluster */

2022-12-04T13:34:59Z

‎Cluster

Samerhijazi: /* Cluster */

2022-12-04T12:48:20Z

‎Cluster

Samerhijazi: /* Namespace */

2022-12-04T12:45:41Z

‎Namespace

Samerhijazi: /* Ingress */

2022-12-04T12:45:03Z

‎Ingress

Samerhijazi: /* manifests */

2022-12-04T12:44:00Z

‎manifests

Samerhijazi: /* Settings */

2022-12-04T12:42:58Z

‎Settings

Samerhijazi: /* Backup-etcd */

2022-12-04T12:40:49Z

‎Backup-etcd

Samerhijazi: /* k8s-master */

2022-12-04T12:40:22Z

‎k8s-master

Samerhijazi: /* Init-RoadMap */

2022-12-04T12:39:53Z

‎Init-RoadMap

@@ Line 419: / Line 419: @@
 <pre class="code">
 kubectl cluster-info
 ----
 kubectl config view
@@ Line 438: / Line 437: @@
 kubectl api-versions
 kubectl api-resources
 kubectl get ep,ns,no,pvc,pv,svc,deploy,rs
 ----

@@ Line 425: / Line 425: @@
 kubectl config use-context
 ----
 kubectl config get-clusters
 kubectl config get-contexts
 ----
 kubectl config set-cluster $NAME_CLUSTER --server=$SERVER
 kubectl config set-context $CONTEXT --cluster=$NAME_CLUSTER --namespace=$NAME_SPACE --user=$USER
 kubectl config set-context --current --namespace=samer

@@ Line 432: / Line 432: @@
 kubectl config set-credentials $USER --client-certificate=file.crt --client-key=file.key
 kubectl config set-context $CONTEXT --cluster=$NAME_CLUSTER --namespace=$NAME_SPACE --user=$USER
 ----
 kubectl proxy --port=8080

@@ Line 595: / Line 595: @@
 ==Namespace==
 <pre class="code">
-k get pods --all-namespaces
+kubectl get pods --all-namespaces
-k get pods -n development
+kubectl get pods -n development
 kubectl config set-context --current --namespace=samer
 ----
-k api-resources --namespaced -o name
+kubectl api-resources --namespaced -o name
 </pre>

@@ Line 563: / Line 563: @@
 rules.http.paths.backend.service.port.name: ***
 ---------------------------------------------------
-k create ing ingress05 \
+kubectl create ing ingress05 \
 --rule="foo.com/bar*=svc1:8080" \
 --rule="foo.com/api=svc2:http" \

@@ Line 350: / Line 350: @@
 --------------------------------------------------------------------------------------------------------------
 /etc/kubernetes/pki/etcd/
-/etc/kubernetes/pki/etcd/ca.crt        ### File for Certificate-Authority
+/etc/kubernetes/pki/etcd/ca.crt                         ### File for Certificate-Authority
-/etc/kubernetes/pki/etcd/server.crt    ### File for certificate
+/etc/kubernetes/pki/etcd/server.crt                     ### File for certificate
-/etc/kubernetes/pki/etcd/server.key    ### File for Key
+/etc/kubernetes/pki/etcd/server.key                     ### File for Key
 --------------------------------------------------------------------------------------------------------------
-/var/lib/etcd                      ### etcd-data
+/var/lib/etcd                                           ### etcd-data
 </pre>
 ==openssl==
 * https://kubernetes.io/docs/tasks/administer-cluster/certificates/
 <pre class="code">
-openssl genrsa -out ca.key 2048     ### Generate a KEY "ca.key" with 2048bit
+openssl genrsa -out ca.key 2048                                                                ### Generate a KEY "ca.key" with 2048bit
 openssl req -x509 -new -nodes -key ca.key -subj "/CN=${MASTER_IP}" -days 10000 -out ca.crt     ### Generate a Certificate "ca.crt"
-openssl x509 -noout -text -in server.crt     ### View the certificate
+openssl x509 -noout -text -in server.crt                                                       ### View the certificate
 openssl x509 -noout -fingerprint -sha256 -inform pem -in key.crt
 </pre>

@@ Line 325: / Line 325: @@
 ## Cluster-Controller (kube-controller-manager) >>> Controlles the status of the cluster.
 ## Cluster-Scheduler (kube-scheduler) >>> The scheduler Decides on which Node new Pods schould be created.
-## Cluster-DNS (CoreDNS) >>> ???
+## Cluster-DNS (CoreDNS) >>> Is a flexible, extensible DNS server that can serve as the Kubernetes cluster DNS.
-## Cluster-ETCD (etcd) >>> The storage of the Settings of the cluster
+## Cluster-ETCD (etcd) >>> The storage of the Settings of the cluster.
 --------------------------------------------------------------------------------------------------------------
-## Worker-Let (kubelet) >>> Installed in every Node. Responsible for starting the Pods
+## Worker-Let (kubelet) >>> Installed in every Node. Responsible for starting the Pods.
 ## Worker-Proxy (kube-proxy) >>> Installed in every Node. Responsible for the communications (nodes, pods)
 </pre>
 =manifests=
 <pre class="code">

@@ Line 255: / Line 255: @@
 ==Backup-etcd==
 <pre class="code">
-/etc/kubernetes/manifests/etcd.yaml                    ### ETCD-Manifesto.
+/etc/kubernetes/manifests/etcd.yaml                  ### ETCD-Manifesto.
-/etc/kubernetes/pki/etcd                                          ### ETCD-PKI
+/etc/kubernetes/pki/etcd                             ### ETCD-PKI
 -------------------------------------------------------------------------------------------------------------------
 CACERT=/etc/kubernetes/pki/etcd/ca.crt               ### certificate authority

@@ Line 174: / Line 174: @@
 sudo sh -c "echo '192.168.178.80 k8s-master' >> /etc/hosts"
 </pre>
-<pre class="file">
+<pre class="code">
 # nano kubeadm-config.yaml
 ---------------------------------------------------------

@@ Line 33: / Line 33: @@
 ==Init-RoadMap==
 <pre class="code">
 * Cluster: Installation Master