miniskf.ubuntu.sh

#!/bin/bash
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export K8_VERSION="v1.21.14"
export TEMPLATE="skfk8/minikube/docker-compose.tpl.yml"
export COMPOSE_FILE="skfk8/minikube/docker-compose.yml"

export PERL='perl -i -pe' ##//perl exists on default OSX and Ubuntu. :)

010-minikube-start() {
    ##According to docs v1.23 is not supposed to support 'api_version="networking.k8s.io/v1beta1"' but seems to be with minikube (?)
    minikube start --kubernetes-version=$K8_VERSION --embed-certs=true --force-systemd=true
    
    cp $TEMPLATE $COMPOSE_FILE

    ##Reads the $TEMPLATE and replace$COMPOSE_FILEs with values to use minikube as the lab cluster
    $PERL "s#REPLACE_ME:/home/user_api/.kube/config#${HOME}/.kube/config:/home/user_api/.kube/config#g" $COMPOSE_FILE
    $PERL "s#LABS_KUBE_CONF=REPLACE_ME#LABS_KUBE_CONF=`cat ${HOME}/.kube/config | base64 | tr -d '\n'`#g" $COMPOSE_FILE
    $PERL "s#FRONTEND_URI=REPLACE_ME#FRONTEND_URI=http://localhost#g" $COMPOSE_FILE
    $PERL "s#SKF_API_URL=REPLACE_ME#SKF_API_URL=http://127.0.0.1/api#g" $COMPOSE_FILE
    $PERL "s#SKF_LABS_DOMAIN=REPLACE_ME#SKF_LABS_DOMAIN=http://$(minikube ip)#g" $COMPOSE_FILE
    $PERL "s#REPLACE_ME:/etc/nginx/nginx.conf#./site.conf:/etc/nginx/nginx.conf#g" $COMPOSE_FILE
    $PERL "s#:X.Y.Z#:4.1.0#g" $COMPOSE_FILE
    
    ##Use Docker to host the front-end/API etc. which is configured to use the minikube labs cluster
    docker-compose -f $COMPOSE_FILE up -d
}

020-minikube-iptables() {
    ##Connect the bridges between minikube and docker
    export brmini=`brctl show|egrep -ie '^br.+veth.*'|cut -f 1|head -n1`
    export brdocker=`brctl show|egrep -ie '^br.+veth.*'|cut -f 1|tail -n1`

    ##ACCEPT all traffic between minikube and docker bridge interfaces
    sudo iptables -I DOCKER-USER -i $brmini -o $brdocker -j ACCEPT
    sudo iptables -I DOCKER-USER -i $brdocker -o $brmini -j ACCEPT
}

999-minikube-destroy() {
    ###DESTROY ALL TRACES and invalidate the configuration above.
    docker-compose -f $COMPOSE_FILE down --volumes
    minikube delete --all

    ##Clean-up iptables mapping from non-exitent br (de-composed, and minikube --delete)
    sudo iptables -D DOCKER-USER -i $brmini -o $brdocker -j ACCEPT
    sudo iptables -D DOCKER-USER -i $brdocker -o $brmini -j ACCEPT
}