Installing Juju 2.0 on Centos7

README.md

Juju 2.0 on Centos7

Configure epel repository

yum -y install epel-release
yum repolist

Install LXD

Install lxc libraries

yum -y install python-requests
rpm --nodeps -i https://copr-be.cloud.fedoraproject.org/results/alonid/yum-plugin-copr/epel-7-x86_64/00110045-yum-plugin-copr/yum-plugin-copr-1.1.31-508.el7.centos.noarch.rpm
yum copr enable thm/lxc2.0
yum -y install lxc lxc-devel

Build from source

yum install -y golang-bin git make dnsmasq squashfs-tools
mkdir ~/go
export GOPATH=~/go

go get github.com/lxc/lxd
cd $GOPATH/src/github.com/lxc/lxd
make

Add to path

cp $GOPATH/bin/* /usr/bin

Start LXD daemon

We want to setup systemd to manage LXD, and ensure that LXD will start after a reboot.

Create the file /etc/systemd/system/lxd.service with the following contents:

[Unit]
Description=LXD Container Hypervisor
Requires=network.service

[Service]
ExecStart=/usr/bin/lxd --group lxd --logfile=/var/log/lxd/lxd.log
KillMode=process
TimeoutStopSec=40
KillSignal=SIGPWR
Restart=on-failure
LimitNOFILE=-1
LimitNPROC=-1

Once you've saved that file, enable, start, and set the service to start on boot:

addgroup lxd

mkdir -p /var/log/lxd
systemctl enable lxd
systemctl start lxd
ln -s /etc/systemd/system/lxd.service /etc/systemd/system/multi-user.target.wants/lxd.net

Configure LXD

The first time LXD is run, we need to setup the storage backend and virtual network bridge. For optimal performance, we recommend using zfs-backed storage. Create a virtual network bridge, enabling ipv4 but disabling ipv6.

lxd init

Testing LXD

Launch an instance to verify that LXD is working. The first launch of an image will take the longest because it needs to download (and cache) the image.

lxc launch ubuntu:16.04
lxc list

Install Juju

curl -o juju-2.0.2-centos7.tar.gz -L https://launchpad.net/juju/2.0/2.0.2/+download/juju-2.0.2-centos7.tar.gz
tar zxf juju-2.0.2-centos7.tar.gz
mkdir -p  /usr/lib/juju-2.0/bin
cp juju-bin/* /usr/lib/juju-2.0/bin 
update-alternatives --install /usr/bin/juju juju /usr/lib/juju-2.0/bin/juju 1

Once this is completed, Juju is installed on your system. You can confirm this by running juju, which will display usage information.

Configuration

SSH

mkdir ~/.ssh
chmod 700 .ssh
ssh-keygen -t rsa

the lxd repo location has changed as well. this is from the README.md

go get -d -v github.com/lxc/lxd/lxd
cd $GOPATH/src/github.com/lxc/lxd
make

Hey.

In this method, there is a problem - packages for Fedora are more likely to not work in CentOS, because they need dependencies for work that are not in CentOS (let's not forget that Fedora software is newer).

For the solution, it's easiest to download the package from the repository to the server with CentOS, and then use the "yum-builddep" and "rpmbuild -rebuild" commands to re-compile the package specifically for CentOS.

Less is a matter of updating programs, many things have to be done manually.