Extend Kubernetes cheatsheet

resources/git.md

@@ -1,7 +1,9 @@
 ## Git
 
-Name | Description
+### Learn Git
+Name | Comments
 :------|:------:
+[git-scm](https://git-scm.com) | The best place (imho) to learn everything about Git (through reading)
 [Interactive Git Branching Learning](https://learngitbranching.js.org/) | Visual and interactive way to learn Git branching
 [Learn git concepts, not commands](https://dev.to/unseenwizzard/learn-git-concepts-not-commands-4gjc) | Article on Git concepts
 [Codeacademy Learn Git](https://www.codecademy.com/learn/learn-git) | Not Free 
@@ -10,6 +12,26 @@ Name | Description
 
 ## CheatSheet
 
+* Clone a repository: `git clone https://github.com/bregman-arie/devops-resources.git`
+* Pull changes from remote repository: `git pull`
+* Pull changes without trying to merge the changes between the local branch and the remote one: `git pull --ff-only`
+
+#### Branches
+* Switch to a branch called "main": `git checkout main`
+* Create (if doesn't exists) and switch to a branch called `devel`: `git checkout -b devel`
+* List branches: `git branch`
+* Update based on status of remote branches: `git remote prune origin`
+* Delete local branch: `git branch -d some-branch`
+
+#### Staging
+
+* See what the current status in the repository: `git status`
+* Add changes to the staging area: `git add <FILE>` or `git add .` to add everything
+
+#### Commits
+* Create a commit: `git commit`
+* List of latest commits: `git log --oneline`
+* Push commits to the remote branch: `git push origin main`
 * Revert to commit X
 
 ```

resources/jinja2.md

@@ -0,0 +1,3 @@
+### CheatSheet
+
+* Split string to list of items using comma as the separator: `{% set list1 = variable1.split(',') %}`

resources/kubernetes.md

@@ -70,8 +70,36 @@ Name | Comments
 
 * List service accounts: `kubectl get serviceaccounts`
 
-### Kubernetes
+### Cluster
 
 * Cluster version: `kubectl version`
 * Cluster information: `kubectl cluster-info`
 * List nodes: `kubectl get nodes`
+
+### Pods
+
+* List of Pods in current namespace: `kubectl get po`
+* List of Pods in all amespaces: `kubectl get po --all-namespaces`
+* Get containers names: `kubectl get po <POD_NAME> -o jsonpath="{.spec.containers[*].name}"`
+
+* Create a Pod from file: `kubectl create -f pod_definition.yaml`
+* Delete a Pod using a YAML definition: `kubectl delete -f pod_definition.yaml`
+* Delete a Pod using the Pod name: `kubectl delete <POD_NAME>`
+* Delete a Pod instantly: `kubectl delete <POD_NAME> --grace-period=0 --force`
+
+* Execute commands inside a container: `kubectl exec -it -c <CONTAINER_NAME> <POD_NAME> ls`
+
+* Display logs of a Pod: `kubectl logs <POD_NAME>`
+* Display logs of a specific container in a Pod: `kubectl logs <POD_NAME> -c <CONTAINER_NAME>`
+
+### User
+
+* Creating a new user
+
+```
+openssl genrsa -out user.key 2048 # create key
+openssl req key user.key user.csr -subj "/CN=user /O=sgroup" # create csr
+openssl x509 -req -in user.csr -CA ca.crt -CAkey ca.key -CAcreateseral -out user.crt -days 365
+kubectl config set-credentials myuser --client-certificates=$PWD/user.crt --client-key=$PWD/user.key
+kubectl config set-context myuser-context --cluster=k8s-cluster --user=user
+```

resources/linux.md

@@ -83,7 +83,10 @@ sudo ausearch -m avc -m user_avc -m selinux_err -m user_selinux_err -i -ts today
 
 #### Tmux
 
-* Join session `tmux a`
+* Join a session `tmux a`
+* Attach to existing session: `tmux attach -t <SESSION_NAME>`
+* New tab: `ctrl + B + c`
+* New session called "bla": `tmux new -s bla`
 
 #### Virsh
 

resources/openshift.md

@@ -19,7 +19,10 @@ Name | Comments
 #### Accounts
 
 * The username of the user currently logged in: `oc whoami`
+
 * Add to user "user1" the ability to view the project "wonderland": `oc adm policy add-role-to-user view user1 -n wonderland`
+* Add a user as admin to the project "wonderland": `oc adm policy add-role-to-user admin some_user -n wonderland`
+
 * Get a list of all context whihc have ever been created: `oc config get-contexts`
 * Check what is the current context: `oc whoami --show-context`
 * The OpenShift server currently used: `oc whoami --show-server`

resources/virtualization.md

@@ -0,0 +1,30 @@
+## Virtualization
+
+### Virsh CheatSheet
+
+* List VMs: `virsh list --all`
+* Shutdown VMs: `virsh shutdown <VM_NAME>`
+* Delete VMs: `virsh undefine <VM_NAME>`
+
+* List pools: `virsh pool-list`
+* Delete pool content: `virsh pool-delete <POOL_NAME>`
+* Deactivate pool: `virsh pool-destroy <POOL_NAME>`
+* Delete the pool object: `virsh pool-undefine <POOL_NAME>`
+
+* List networks: `virsh net-list`
+* Delete network: `virsh net-undefine <NETWORK_NAME> && virsh net-destroy <NETWORK_NAME>`
+
+### Vagrant Resources
+
+Name | Description
+:------|:------:
+[Official Docs](https://www.vagrantup.com/intro/index.html) | Multi-container applications
+
+#### Vagrant Cheatsheet
+
+* Initialize vagrant file using Fedora image: `vagrant init fedora/33-cloud-base`
+* Bring up the VM: `vagrant up`
+* SSH into the machine: `vagrant ssh`
+* Shutdown: `vagrant halt`
+* Delete the VM: `vagrant destroy`
+* Reload Vagrant configuration: `vagrant reload`