Traffic Ops - Installing

System Requirements

The user must have the following for a successful minimal install:

As of version 2.0 only PostgreSQL is supported as the database. This documentation assumes CentOS 7.2 and PostgreSQL 9.6.3 for a production install.


  1. Install PostgreSQL Database


    For more information on installing PostgreSQL, see their documentation.

    For a production install it is best to install PostgreSQL on its own server/VM. To install PostgreSQL, on the PostgreSQL host (hostname pg in example), run the following commands as the root user (or with sudo):

    yum update -y
    yum install -y
    yum install -y postgresql96-server
    su - postgres -c '/usr/pgsql-9.6/bin/initdb -A md5 -W' #-W forces the user to provide a superuser (postgres) password

    Edit /var/lib/pgsql/9.6/data/pg_hba.conf to allow your Traffic Ops instance to access the PostgreSQL server. For example if you are going to install Traffic Ops on add:

    host  all   all md5

    to the appropriate section of this file. Edit the /var/lib/pgsql/9.6/data/postgresql.conf file to add the appropriate listen_addresses or listen_addresses = '*', set timezone = 'UTC', and start the database:

    systemctl enable postgresql-9.6
    systemctl start postgresql-9.6
    systemctl status postgresql-9.6
  2. Build a Traffic Ops .rpm file using the instructions under the Building Traffic Control page.

  3. Install PostgreSQL. To install the PostgreSQL 9.6 yum repository, run this command as the root user (or with sudo):

    yum install -y
  4. Install the Traffic Ops RPM. The Traffic Ops RPM file should have been built in an earlier step. To install it, simply run the following command as the root user (or with sudo):

    yum install -y ./dist/traffic_ops-2.0.0-xxxx.yyyyyyy.el7.x86_64.rpm


    This will install the PostgreSQL client, psql as a dependency.

  5. Install Additional Packages. Some packages on which Traffic Ops depends not have been installed as direct dependencies of the traffic_ops-<version stuff>.rpm. To explicitly install these, run the following commands as the root user (or with sudo):

    yum install -y git
    wget -q -O go.tar.gz
    tar -C /usr/local -xzf go.tar.gz
    PATH=$PATH:/usr/local/go/bin                    # go binaries are needed in the path for the 'postinstall' script
    go get


    These are for the Traffic Control version 2.0.0 install, this may change, but the explicit installs won’t hurt.

  6. Login to the Database from the Traffic Ops machine. At this point you should be able to login from the Traffic Ops (hostname to in the example) host to the PostgreSQL (hostname pg in the example) host like so:

    to-# psql -h -U postgres
    Password for user postgres:
    psql (9.6.3)
    Type "help" for help.
  7. Create the User and Database. In this example, we use user: traffic_ops, password: tcr0cks, database: traffic_ops:

    to-# psql -U postgres -h -c "CREATE USER traffic_ops WITH ENCRYPTED PASSWORD 'tcr0cks';"
    Password for user postgres:
    to-# createdb traffic_ops --owner traffic_ops -U postgres -h
  8. Run the postinstall Script. Now, run the following command as the root user (or with sudo): /opt/traffic_ops/install/bin/postinstall. The postinstall script will first get all packages needed from CPAN. This may take a while, expect up to 30 minutes on the first install. If there are any prompts in this phase, please just answer with the defaults (some CPAN installs can prompt for install questions). When this phase is complete, you will see Complete! Modules were installed into /opt/traffic_ops/app/local. Some additional files will be installed, and then it will proceed with the next phase of the install, where it will ask you about the local environment for your CDN. Please make sure you remember all your answers and verify that the database answers match the information previously used to create the database. Example output:

    Database type [Pg]:
    Database type: Pg
    Database name [traffic_ops]:
    Database name: traffic_ops
    Database server hostname IP or FQDN [localhost]:
    Database server hostname IP or FQDN:
    Database port number [5432]:
    Database port number: 5432
    Traffic Ops database user [traffic_ops]:
    Traffic Ops database user: traffic_ops
    Password for Traffic Ops database user:
    Re-Enter Password for Traffic Ops database user:
    Writing json to /opt/traffic_ops/app/conf/production/database.conf
    Database configuration has been saved
    Database server root (admin) user [postgres]:
    Database server root (admin) user: postgres
    Password for database server admin:
    Re-Enter Password for database server admin:
    Download Maxmind Database? [yes]:
    Download Maxmind Database?: yes
    Generate a new secret? [yes]:
    Generate a new secret?: yes
    Number of secrets to keep? [10]:
    Number of secrets to keep?: 10
    Not setting up ldap
    Administration username for Traffic Ops [admin]:
    Administration username for Traffic Ops: admin
    Password for the admin user:
    Re-Enter Password for the admin user:
    Writing json to /opt/traffic_ops/install/data/json/users.json
    Do you want to generate a certificate? [yes]:
    Country Name (2 letter code): US
    State or Province Name (full name): CO
    Locality Name (eg, city): Denver
    Organization Name (eg, company): Super CDN, Inc
    Organizational Unit Name (eg, section):
    Common Name (eg, your name or your server's hostname):
    RSA Passphrase:
    Re-Enter RSA Passphrase:
    Traffic Ops url [https://localhost]:
    Traffic Ops url: https://localhost
    Human-readable CDN Name.  (No whitespace, please) [kabletown_cdn]: blue_cdn
    Human-readable CDN Name.  (No whitespace, please): blue_cdn
    DNS sub-domain for which your CDN is authoritative []:
    DNS sub-domain for which your CDN is authoritative:
    Writing json to /opt/traffic_ops/install/data/json/profiles.json
    Downloading Maxmind data
    --2017-06-11 15:32:41--
    Resolving ( 2400:cb00:2048:1::6810:262f, 2400:cb00:2048:1::6810:252f,, ...
    Connecting to (|2400:cb00:2048:1::6810:262f|:80... connected.
    ... much SQL output skipped
    Starting Traffic Ops
    Restarting traffic_ops (via systemctl):                    [  OK  ]
    Waiting for Traffic Ops to restart
    Success! Postinstall complete.
    Explanation of the information that needs to be provided:
    Field Description
    Database type This requests the type of database to be used. Answer with the default - ‘Pg’ to indicate a PostgreSQL database.
    Database name The name of the database Traffic Ops uses to store the configuration information.
    Database server hostname IP or FQDN The hostname of the database server (pg in the example).
    Database port number The database port number. The default value, 5432, should be correct unless you changed it during the setup.
    Traffic Ops database user The username Traffic Ops will use to read/write from the database.
    Password for Traffic Ops The password for the database user that Traffic Ops uses.
    Database server root (admin) user name Privileged database user that has permission to create the database and user for Traffic Ops.
    Database server root (admin) user password The password for the privileged database user.
    Traffic Ops URL The URL to connect to this instance of Traffic Ops, usually https://<Traffic Ops host FQDN>/
    Human-readable CDN Name The name of the first CDN which Traffic Ops will be manage.
    DNS sub-domain for which your CDN is authoritative The DNS domain that will be delegated to this Traffic Control CDN.
    Administration username for Traffic Ops The Administration (highest privilege) Traffic Ops user to create. Use this user to login for the first time and create other users.
    Password for the admin user The password for the administrative Traffic Ops user.

Traffic Ops is now installed!

To complete the Traffic Ops Setup See: Default Profiles

Upgrading Traffic Ops

To upgrade from older Traffic Ops versions, run the following commands as the root user (or with sudo):

systemctl stop traffic_ops
yum upgrade traffic_ops
pushd /opt/traffic_ops/app/
./db/admin --env production upgrade

After this completes, see Traffic Ops - Installing to run the postinstall script. Once the postinstall script, has finished, run the following command as the root user (or with sudo): systemctl start traffic_ops