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Interesting example from justfile documentation: where it create mktemp and set it in variable then by concatenation you get a full path to the tar.gz. Then the Recipe “publish” create the artifact again and push it to a server. 1tmpdir := `mktemp` # Create a tmp file 2version := "0.2.7" 3tardir := tmpdir / "awesomesauce-" + version 4tarball := tardir + ".tar.gz" # use tmpfile path to create a tarball 5 6publish: 7 rm -f {{tarball}} 8 mkdir {{tardir}} 9 cp README.md *.c {{tardir}} 10 tar zcvf {{tarball}} {{tardir}} 11 scp {{tarball}} me@server.com:release/ 12 rm -rf {{tarball}} {{tardir}} This one can be really usefull to define a default value which can be redefine with env variable:

Shell Variable $$var $$( python -c ‘import sys; print(sys.implementation.name)’ ) Make Variable T ?= foo # give a default value T := $(shell whoami) # execute shell immediately to put in the var PHONY to execute several makefile Example 1 1SUBDIRS = foo bar baz 2 3## dir is a Shell variables 4## SUBDIR and MAKE are Internal make variables 5subdirs: 6 for dir in $(SUBDIRS); do \ 7 $(MAKE) -C $$dir; \ 8 done Example 2 1SUBDIRS = foo bar baz 2 3.PHONY: subdirs $(SUBDIRS) 4subdirs: $(SUBDIRS) 5$(SUBDIRS): 6 $(MAKE) -C $@ 7foo: baz Idea for a testing tools 1git clone xxx /tmp/xxx&& make -C !$/Makefile 2make download le conteneur 3make build le binaire 4make met le dans /use/local/bin 5make clean 6make help Sources: Tutorials

Deploy a Nexus3 in container on VM Load the image 1podman pull sonatype/nexus3:3.59.0 2podman save sonatype/nexus3:3.59.0 -o nexus3.tar 3podman load < nexus3.tar Create a service inside /etc/systemd/system/container-nexus3.service with content below: 1[Unit] 2Description=Nexus Podman container 3Wants=syslog.service 4 5[Service] 6User=nexus-system 7Group=nexus-system 8Restart=always 9ExecStart=/usr/bin/podman run \ 10 --log-level=debug \ 11 --rm \ 12 -ti \ 13 --publish 8081:8081 \ 14 --name nexus \ 15 sonatype/nexus3:3.59.0 16 17ExecStop=/usr/bin/podman stop -t 10 nexus 18 19[Install] 20WantedBy=multi-user.target

Pypi Repo for airgap env Let’s take as an example py dependencies for Netbox 1# Tools needed 2dnf install -y python3.11 3pip install --upgrade pip setuptool python-pypi-mirror twine 4 5# init mirror 6python3.11 -m venv mirror 7mkdir download 8 9# Get list of Py packages needed 10curl raw.githubusercontent.com/netbox-community/netbox/v3.7.3/requirements.txt -o requirements.txt 11echo pip >> requirements.txt 12echo setuptools >> requirements.txt 13echo uwsgi >> requirements.txt 14 15# Make sure repository CA is installed 16curl http://pki.server/pki/cacerts/ISSUING_CA.pem -o /etc/pki/ca-trust/source/anchors/issuing.crt 17curl http://pki.server/pki/cacerts/ROOT_CA.pem -o /etc/pki/ca-trust/source/anchors/root.crt 18update-ca-trust 19 20 21source mirror/bin/activate 22pypi-mirror download -b -d download -r requirements.tx 23twine upload --repository-url https://nexus3.server/repository/internal-pypi/ download/*.whl --cert /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem 24twine upload --repository-url https://nexus3.server/repository/internal-pypi/ /download/*.tar.gz --cert /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem Then on target host inside /etc/pip.conf :

Some time ago, I made a small shell script to handle Vault on a cluster kubernetes. For documentation purpose. Install Vault with helm 1#!/bin/bash 2 3## Variables 4DIRNAME=$(dirname $0) 5DEFAULT_VALUE="vault/values-override.yaml" 6NewAdminPasswd="PASSWORD" 7PRIVATE_REGISTRY_USER="registry-admin" 8PRIVATE_REGISTRY_PASSWORD="PASSWORD" 9PRIVATE_REGISTRY_ADDRESS="registry.example.com" 10DOMAIN="example.com" 11INGRESS="vault.${DOMAIN}" 12 13if [ -z ${CM_NS+x} ];then 14 CM_NS='your-namespace' 15fi 16 17if [ -z ${1+x} ]; then 18 VALUES_FILE="${DIRNAME}/${DEFAULT_VALUE}" 19 echo -e "\n[INFO] Using default values file '${DEFAULT_VALUE}'" 20else 21 if [ -f $1 ]; then 22 echo -e "\n[INFO] Using values file $1" 23 VALUES_FILE=$1 24 else 25 echo -e "\n[ERROR] No file exist $1" 26 exit 1 27 fi 28fi 29 30## Functions 31function checkComponentsInstall() { 32 componentsArray=("kubectl" "helm") 33 for i in "${componentsArray[@]}"; do 34 command -v "${i}" >/dev/null 2>&1 || 35 { echo "${i} is required, but it's not installed. Aborting." >&2; exit 1; } 36 done 37} 38 39function createSecret() { 40kubectl get secret -n ${CM_NS} registry-pull-secret --no-headers 2> /dev/null \ 41|| \ 42kubectl create secret docker-registry -n ${CM_NS} registry-pull-secret \ 43 --docker-server=${PRIVATE_REGISTRY_ADDRESS} \ 44 --docker-username=${PRIVATE_REGISTRY_USER} \ 45 --docker-password=${PRIVATE_REGISTRY_ADDRESS} 46} 47 48function installWithHelm() { 49helm dep update ${DIRNAME}/helm 50 51helm upgrade --install vault ${DIRNAME}/helm \ 52--namespace=${CM_NS} --create-namespace \ 53--set global.imagePullSecrets.[0]=registry-pull-secret \ 54--set global.image.repository=${PRIVATE_REGISTRY_ADDRESS}/hashicorp/vault-k8s \ 55--set global.agentImage.repository=${PRIVATE_REGISTRY_ADDRESS}/hashicorp/vault \ 56--set ingress.hosts.[0]=${INGRESS} \ 57--set ingress.enabled=true \ 58--set global.leaderElection.namespace=${CM_NS} 59 60echo -e "\n[INFO] sleep 30s" && sleep 30 61} 62 63checkComponentsInstall 64createSecret 65installWithHelm Init Vault on kubernetes Allow local kubernetes to create and reach secret on the Vault

Package with pip3 1pip3 freeze netaddr > requirements.txt 2pip3 download -r requirements.txt -d wheel 3mv requirements.txt wheel 4tar -zcf wheelhouse.tar.gz wheel 5tar -zxf wheelhouse.tar.gz 6pip3 install -r wheel/requirements.txt --no-index --find-links wheel Package with Poetry 1curl -sSL https://install.python-poetry.org | python3 - 2poetry new rp-poetry 3poetry add ansible 4poetry add poetry 5poetry add netaddr 6poetry add kubernetes 7poetry add jsonpatch 8poetry add `cat ~/.ansible/collections/ansible_collections/kubernetes/core/requirements.txt` 9 10poetry build 11 12pip3 install dist/rp_poetry-0.1.0-py3-none-any.whl 13 14poetry export --without-hashes -f requirements.txt -o requirements.txt Push dans Nexus 1poetry config repositories.test http://localhost 2poetry publish -r test Images Builder 1podman login registry.redhat.io 2podman pull registry.redhat.io/ansible-automation-platform-22/ansible-python-base-rhel8:1.0.0-230 3 4pyenv local 3.9.13 5python -m pip install poetry 6poetry init 7poetry add ansible-builder

Specific to RHEL 1# Create a trust zone for the two interconnect 2sudo firewall-cmd --permanent --zone=trusted --add-source=10.42.0.0/16 #pods 3sudo firewall-cmd --permanent --zone=trusted --add-source=10.43.0.0/16 #services 4sudo firewall-cmd --reload 5sudo firewall-cmd --list-all-zones 6 7# on Master 8sudo rm -f /var/lib/cni/networks/cbr0/lock 9sudo /usr/local/bin/k3s-killall.sh 10sudo systemctl restart k3s 11sudo systemctl status k3s 12 13# on Worker 14sudo rm -f /var/lib/cni/networks/cbr0/lock 15sudo /usr/local/bin/k3s-killall.sh 16sudo systemctl restart k3s-agent 17sudo systemctl status k3s-agent Check Certificates 1# Get CA from K3s master 2openssl s_client -connect localhost:6443 -showcerts < /dev/null 2>&1 | openssl x509 -noout -enddate 3openssl s_client -showcerts -connect 193.168.51.103:6443 < /dev/null 2>/dev/null|openssl x509 -outform PEM 4openssl s_client -showcerts -connect 193.168.51.103:6443 < /dev/null 2>/dev/null|openssl x509 -outform PEM | base64 | tr -d '\n' 5 6# Check end date: 7for i in `ls /var/lib/rancher/k3s/server/tls/*.crt`; do echo $i; openssl x509 -enddate -noout -in $i; done 8 9# More efficient: 10cd /var/lib/rancher/k3s/server/tls/ 11for crt in *.crt; do printf '%s: %s\n' "$(date --date="$(openssl x509 -enddate -noout -in "$crt"|cut -d= -f 2)" --iso-8601)" "$crt"; done | sort 12 13# Check CA issuer 14for i in $(find . -maxdepth 1 -type f -name "*.crt"); do openssl x509 -in ${i} -noout -issuer; done General Checks RKE2/K3S Nice gist to troubleshoot etcd link

Operators have 3 kinds : go, ansible, helm. 1## Init an Ansible project 2operator-sdk init --plugins=ansible --domain example.org --owner "Your name" 3 4## Command above will create a structure like: 5netbox-operator 6├── Dockerfile 7├── Makefile 8├── PROJECT 9├── config 10│ ├── crd 11│ ├── default 12│ ├── manager 13│ ├── manifests 14│ ├── prometheus 15│ ├── rbac 16│ ├── samples 17│ ├── scorecard 18│ └── testing 19├── molecule 20│ ├── default 21│ └── kind 22├── playbooks 23│ └── install.yml 24├── requirements.yml 25├── roles 26│ └── deployment 27└── watches.yaml 1## Create first role 2operator-sdk create api --group app --version v1alpha1 --kind Deployment --generate-role

Deploy a Quay.io / Mirror-registry on container Nothing original, it just the documentation of redhat, but can be usefull to kickstart a registry. Prerequisites: 10G /home 15G /var 300G /srv or /opt (regarding QuayRoot) min 2 or more vCPUs. min 8 GB of RAM. 1# packages 2sudo yum install -y podman 3sudo yum install -y rsync 4sudo yum install -y jq 5 6# Get tar 7mirror="https://mirror.openshift.com/pub/openshift-v4/clients" 8wget ${mirror}/mirror-registry/latest/mirror-registry.tar.gz 9tar zxvf mirror-registry.tar.gz 10 11# Get oc-mirror 12curl https://mirror.openshift.com/pub/openshift-v4/x86_64/clients/ocp/latest/oc-mirror.rhel9.tar.gz -O 13 14# Basic install 15sudo ./mirror-registry install \ 16 --quayHostname quay01.example.local \ 17 --quayRoot /opt 18 19# More detailed install 20sudo ./mirror-registry install \ 21 --quayHostname quay01.example.local \ 22 --quayRoot /srv \ 23 --quayStorage /srv/quay-pg \ 24 --pgStorage /srv/quay-storage \ 25 --sslCert tls.crt \ 26 --sslKey tls.key 27 28podman login -u init \ 29 -p 7u2Dm68a1s3bQvz9twrh4Nel0i5EMXUB \ 30 quay01.example.local:8443 \ 31 --tls-verify=false 32 33# By default login go in: 34cat $XDG_RUNTIME_DIR/containers/auth.json 35 36# Get IP 37sudo podman inspect --format '{{range.NetworkSettings.Networks}}{{.IPAddress}}{{end}}' quay-app 38 39#unistall 40sudo ./mirror-registry uninstall -v \ 41 --quayRoot <example_directory_name> 42 43# Info 44curl -u init:password https://quay01.example.local:8443/v2/_catalog | jq 45curl -u root:password https://<url>:<port>/v2/ocp4/openshift4/tags/list | jq 46 47# Get an example of imageset 48oc-mirror init --registry quay.example.com:8443/mirror/oc-mirror-metadata 49 50# Get list of Operators, channels, packages 51oc-mirror list operators --catalog=registry.redhat.io/redhat/redhat-operator-index:v4.14 52oc-mirror list operators --catalog=registry.redhat.io/redhat/redhat-operator-index:v4.14 --package=kubevirt-hyperconverged 53oc-mirror list operators --catalog=registry.redhat.io/redhat/redhat-operator-index:v4.14 --package=kubevirt-hyperconverged --channel=stable unlock user init/admin 1QUAY_POSTGRES=`podman ps | grep quay-postgres | awk '{print $1}'` 2 3podman exec -it $QUAY_POSTGRES psql -d quay -c "UPDATE "public.user" SET invalid_login_attempts = 0 WHERE username = 'init'" Source Mirror-registry

Presentation Gita is opensource project in python to handle a bit number of projects available: Here 1# Install 2pip3 install -U gita 3 4# add repo in gita 5gita add dcc/ssg/toolset 6gita add -r dcc/ssg # recursively add 7gita add -a dcc # resursively add and auto-group based on folder structure 8 9# create a group 10gita group add docs -n ccn 11 12# Checks 13gita ls 14gita ll -g 15gita group ls 16gita group ll 17gita st dcc 18 19# Use 20gita pull ccn 21gita push ccn 22 23gita freeze