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Application development in a distributed system

Development of Distributed Systems from Design to Application


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= Setup
TIP: Tested on a Raspberry Pi with "Buster"
NOTE: * *sudo su* # if not already done
== Install prerequisites
[source,sh]
----
apt-get install apt-transport-https ca-certificates software-properties-common git gcc g++ make jq -y
curl -sL https://deb.nodesource.com/setup_15.x | sudo -E bash -
apt-get install -y nodejs
npm install -g pm2
----
== Download and install Docker.
[source,sh]
----
curl -fsSL get.docker.com -o get-docker.sh && sh get-docker.sh
usermod -aG docker pi
curl https://download.docker.com/linux/raspbian/gpg
----
== Give the ‘pi’ user the ability to run Docker.
[source,sh]
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sudo usermod -aG docker pi
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== Import Docker and swarmlab.io keys
[source,sh]
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curl https://download.docker.com/linux/raspbian/gpg
cat > /root/get-certs-swarmlab <<'EOF'
registry_address=hub.swarmlab.io
registry_port=5443
mkdir -p /etc/docker/certs.d/$registry_address:$registry_port
openssl s_client -showcerts -connect $registry_address:$registry_port < /dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /etc/docker/certs.d/$registry_address:$registry_port/ca.crt
registry_port=5480
mkdir -p /etc/docker/certs.d/$registry_address:$registry_port
openssl s_client -showcerts -connect $registry_address:$registry_port < /dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /etc/docker/certs.d/$registry_address:$registry_port/ca.crt
EOF
chmod +x /root/get-certs-swarmlab
/root/get-certs-swarmlab
----
== Add the Docker Repo.
[source,sh]
----
echo "deb https://download.docker.com/linux/raspbian/ buster stable" >> /etc/apt/sources.list
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== Update your Pi.
[source,sh]
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apt-get update
apt-get upgrade
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== Start the Docker service.
[source,sh]
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systemctl enable docker.service
systemctl start docker.service
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== Verify that Docker is installed and running.
[source,sh]
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docker info
docker ps
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== install docker-compose
[source,sh]
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apt-get install libffi-dev libssl-dev
apt install python3-dev
apt-get install -y python3 python3-pip
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*python3* and *pip3* are installed, we can install Docker-Compose using the following command:
[source,sh]
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pip3 install docker-compose
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=== check it
docker-compose --version
docker-compose => 1.27.4
== Fix "x509: certificate signed by unknown authority" issue
* On Error:
Get https ://registry.vlabs.uniwa.gr:5080/v2/: x509: certificate
Pulling ...
ERROR: Get https://registry.vlabs.uniwa.gr:5080/v2/: x509: certificate signed by unknown authority
http://docs.swarmlab.io/SwarmLab-HowTos/swarmlab/docs/swarmlab/docs/install/install-docker.html#fix-x509-certificate-signed-by-unknown-authority-issue[See here^]
or simple run:
[source,sh]
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/root/get-certs-swarmlab
----
== Install WireGuard
To install the most recent version of WireGuard, we’ll need packages from the Debian unstable release.
[source,sh]
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sh -c "echo 'deb http://deb.debian.org/debian/ unstable main' >> /etc/apt/sources.list.d/unstable.list"
sh -c "printf 'Package: *\nPin: release a=unstable\nPin-Priority: 90\n' >> /etc/apt/preferences.d/limit-unstable"
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Update and Install the WireGuard packages
[source,sh]
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apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 04EE7237B7D453EC
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 648ACFD622F3D138
apt update
apt install wireguard --assume-yes
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== Create Keys
[source,sh]
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(umask 077 && wg genkey > wg-private.key)
wg pubkey < wg-private.key > wg-public.key
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== Reboot
NOTE: reboot