Install Inmanta¶
This page explain how to install the Inmanta orchestrator software and setup an orchestration server. Regardless what platform you installed it on, Inmanta requires at least the latest Python 3.6 or 3.7 and git.
For CentOS use yum:
sudo tee /etc/yum.repos.d/inmanta_oss_stable.repo <<EOF
[inmanta-oss-stable]
name=Inmanta OSS stable
baseurl=https://pkg.inmanta.com/inmanta-oss-stable/el7/
gpgcheck=1
gpgkey=https://pkg.inmanta.com/inmanta-oss-stable/inmanta-oss-stable-public-key
repo_gpgcheck=1
enabled=1
enabled_metadata=1
EOF
sudo yum install -y python3-inmanta python3-inmanta-server python3-inmanta-agent
The first package (python3-inmanta) contains all the code and the commands. The server and the agent packages install config files and systemd unit files. The dashboard is installed with the server package.
First make sure Python >= 3.6 and git are installed. Inmanta requires many dependencies so it is recommended to create a virtual env. Next install inmanta with pip install in the newly created virtual env.
# Install python3 >= 3.6 and git
sudo python3 -m venv /opt/inmanta
sudo /opt/inmanta/bin/pip install inmanta
sudo /opt/inmanta/bin/inmanta --help
The misc folder in the source distribution contains systemd service files for both the server and the agent. Also
install inmanta.cfg
from the misc folder in /etc/inmanta/inmanta.cfg
If you want to use the dashboard you need to install it as well. Get the source from our github page Next, build and install the dashboard. For this you need to have yarn and grunt:
tar xvfz inmanta-dashboard-20xx.x.x.tar.gz
cd inmanta-dashboard-20xx.x.x
yarn install
grunt dist
This creates a dist.tgz file in the current directory. Unpack this tarball in /opt/inmanta/dashboard
and point
the server in /etc/inmanta/inmanta.cfg
to this location: set
dashboard.path
to /opt/inmanta/dashboard
On Windows only the compile and export commands are supported. This is useful in the Push to server deployment mode of inmanta. First make sure you have Python >= 3.6 and git. Inmanta requires many dependencies so it is recommended to create a virtual env. Next install inmanta with pip install in the newly created virtual env.
# Install python3 >= 3.6 and git
python3 -m venv C:\inmanta\env
C:\inmanta\env\Script\pip install inmanta
C:\inmanta\env\Script\inmanta --help
Get the source either from our release page on github or clone/download a branch directly.
git clone https://github.com/inmanta/inmanta.git
cd inmanta
pip install -c requirements.txt .
Warning
When you use Inmanta modules that depend on python libraries with native code, python headers and a working compiler are required as well.
Configure server¶
This guide goes through the steps to set up an Inmanta service orchestrator server. This guide assumes a RHEL 7 or CentOS 7 server is used. The rpm packages install the server configuration file in /etc/inmanta/inmanta.cfg.
Optional step 1: Setup SSL and authentication¶
Follow the instructions in Setting up authentication to configure both SSL and authentication. While not mandatory, it is highly recommended you do so.
Step 2: Install PostgreSQL 10¶
PostgreSQL 10 can be installed by following the installation guide for your platform.
If you are in the process of migrating an existing Inmanta server from MongoDB to PosgreSQL, you can use the following database migration procedure: Migrate from MongoDB to PostgreSQL.
Step 3: Setup a PostgreSQL database for the Inmanta server¶
Initialize the PostgreSQL server:
sudo /usr/pgsql-10/bin/postgresql-10-setup initdb
Start the PostgreSQL database
sudo systemctl start postgresql-10
Create a inmanta user and an inmanta database by executing the following command. This command will request you to choose a password for the inmanta database.
sudo -u postgres -i sh -c "createuser --pwprompt inmanta; createdb -O inmanta inmanta"
Change the authentication method for local connections to md5 by changing the following lines in the
/var/lib/pgsql/10/data/pg_hba.conf
file
# IPv4 local connections:
host all all 127.0.0.1/32 ident
# IPv6 local connections:
host all all ::1/128 ident
to
# IPv4 local connections:
host all all 127.0.0.1/32 md5
# IPv6 local connections:
host all all ::1/128 md5
Restart the PostgreSQL server to apply the changes made in the pg_hba.conf
file:
sudo systemctl restart postgresql-10
Step 4: Set the database connection details¶
Add a /etc/inmanta/inmanta.d/database.cfg
file as such that it contains the correct database connection details.
That file should look as follows:
[database]
name=inmanta
username=inmanta
password=<password>
Replace <password> in the above-mentioned snippet with the password of the inmanta database. By default Inmanta tries to
connect to the local server and uses the database inmanta. See the database
section in the
configfile for other options.
Step 5: Set the server address¶
When virtual machines are started by this server that install the inmanta agent, the correct
server.server-address
needs to be
configured. This address is used to create the correct boot script for the virtual machine.
Set this value to the hostname or IP address that others systems use to connect to the server
in the configuration file stored at /etc/inmanta/inmanta.d/server.cfg
.
Note
If you deploy configuration models that modify resolver configuration it is recommended to use the IP address instead of the hostname.
Step 6: Configure ssh of the inmanta user¶
The inmanta user that runs the server needs a working ssh client. This client is required to checkout git repositories over ssh and if the remote agent is used.
Provide the inmanta user with one or more private keys:
Generate a new key with ssh-keygen as the inmanta user:
sudo -u inmanta ssh-keygen -N ""
Install an exiting key in
/var/lib/inmanta/.ssh/id_rsa
Make sure the permissions and ownership are set correctly.
ls -l /var/lib/inmanta/.ssh/id_rsa -rw-------. 1 inmanta inmanta 1679 Mar 21 13:55 /var/lib/inmanta/.ssh/id_rsa
Configure ssh to accept all host keys or white list the hosts that are allowed or use signed host keys (depends on your security requirements). This guide configures ssh client for the inmanta user to accept all host keys. Create
/var/lib/inmanta/.ssh/config
and create the following content:
Host * StrictHostKeyChecking no UserKnownHostsFile=/dev/nullEnsure the file belongs to the inmanta user:
sudo chown inmanta:inmanta /var/lib/inmanta/.ssh/config
Add the public key to any git repositories and save if to include in configuration models that require remote agents.
Test if you can login into a machine that has the public key and make sure ssh does not show you any prompts to store the host key.
Step 7: Start the Inmanta server¶
Start the Inmanta server and make sure it is started at boot.
sudo systemctl enable inmanta-server
sudo systemctl start inmanta-server
Step 8: Connect to the dashboard¶
The server dashboard is now available on port ‘8888’
Optional Step 9: Setup influxdb for collection of performance metrics¶
Follow the instructions in Performance Metering to send performance metrics to influxdb. This is only recommended for production deployments.