1. Enable EPEL

dnf install -y epel-release
dnf config-manager --set-enabled crb

2. Install Packages

Run these commands to use the upstream Postgres package repository:

dnf install -y https://download.postgresql.org/pub/repos/yum/reporpms/EL-9-x86_64/pgdg-redhat-repo-latest.noarch.rpm
dnf -qy module disable postgresql

Now install all the required packages:

dnf install -y postgresql16 postgresql16-server postgresql16-libs postgresql16-devel postgresql16-contrib
dnf install -y git gcc make redis httpd mod_ssl mod_xsendfile
dnf install -y libjpeg-turbo-devel libxslt-devel libxml2-devel libffi-devel pcre-devel libyaml-devel zlib-devel bzip2 bzip2-devel readline-devel sqlite sqlite-devel openssl-devel xz xz-devel findutils libuuid-devel tar pango
/usr/pgsql-16/bin/postgresql-16-setup initdb
systemctl start postgresql-16.service redis.service

3. Create a Database

We create a user and database for indico and enable the necessary Postgres extensions (which can only be done by the Postgres superuser)

su - postgres -c 'createuser indico'
su - postgres -c 'createdb -O indico indico'
su - postgres -c 'psql indico -c "CREATE EXTENSION unaccent; CREATE EXTENSION pg_trgm;"'


Do not forget to setup a cronjob that creates regular database backups once you start using Indico in production!

4. Configure uWSGI & Apache

The default uWSGI and Apache configuration files should work fine in most cases.

cat > /etc/uwsgi-indico.ini <<'EOF'
uid = indico
gid = apache
umask = 027

processes = 4
enable-threads = true
chmod-socket = 770
socket = /opt/indico/web/uwsgi.sock
stats = /opt/indico/web/uwsgi-stats.sock
protocol = uwsgi

master = true
auto-procname = true
procname-prefix-spaced = indico
disable-logging = true

single-interpreter = true

touch-reload = /opt/indico/web/indico.wsgi
wsgi-file = /opt/indico/web/indico.wsgi
virtualenv = /opt/indico/.venv

vacuum = true
buffer-size = 20480
memory-report = true
max-requests = 2500
harakiri = 900
harakiri-verbose = true
reload-on-rss = 2048
evil-reload-on-rss = 8192

We also need a systemd unit to start uWSGI.

cat > /etc/systemd/system/indico-uwsgi.service <<'EOF'
Description=Indico uWSGI

ExecStart=/opt/indico/.venv/bin/uwsgi --ini /etc/uwsgi-indico.ini
ExecReload=/bin/kill -HUP $MAINPID



Replace YOURHOSTNAME in the next files with the hostname on which your Indico instance should be available, e.g. indico.yourdomain.com

cat > /etc/httpd/conf.d/indico-sslredir.conf <<'EOF'
<VirtualHost *:80>
    RewriteEngine On
    RewriteRule ^(.*)$ https://%{HTTP_HOST}$1 [R=301,L]

cat > /etc/httpd/conf.d/indico.conf <<'EOF'
<VirtualHost *:443>
    DocumentRoot "/var/empty/apache"

    SSLEngine               on
    SSLCertificateFile      /etc/ssl/indico/indico.crt
    SSLCertificateChainFile /etc/ssl/indico/indico.crt
    SSLCertificateKeyFile   /etc/ssl/indico/indico.key

    SSLProtocol             all -SSLv3 -TLSv1 -TLSv1.1
    SSLHonorCipherOrder     off
    SSLSessionTickets       off

    XSendFile on
    XSendFilePath /opt/indico
    CustomLog /opt/indico/log/apache/access.log combined
    ErrorLog /opt/indico/log/apache/error.log
    LogLevel error
    ServerSignature Off

        Redirect 301 / https://YOURHOSTNAME/

    AliasMatch "^/(images|fonts)(.*)/(.+?)(__v[0-9a-f]+)?\.([^.]+)$" "/opt/indico/web/static/$1$2/$3.$5"
    AliasMatch "^/(css|dist|images|fonts)/(.*)$" "/opt/indico/web/static/$1/$2"
    Alias /robots.txt /opt/indico/web/static/robots.txt

    SetEnv UWSGI_SCHEME https
    ProxyPass / unix:/opt/indico/web/uwsgi.sock|uwsgi://localhost/

    <Directory /opt/indico>
        AllowOverride None
        Require all granted

Now enable the uwsgi proxy module in apache:

echo 'LoadModule proxy_uwsgi_module modules/mod_proxy_uwsgi.so' > /etc/httpd/conf.modules.d/proxy_uwsgi.conf

5. Create a TLS Certificate

First, create the folders for the certificate/key and set restrictive permissions on them:

mkdir /etc/ssl/indico
chown root:root /etc/ssl/indico/
chmod 700 /etc/ssl/indico

If you are just trying out Indico you can simply use a self-signed certificate (your browser will show a warning which you will have to confirm when accessing your Indico instance for the first time).


Do not forget to replace YOURHOSTNAME with the same value you used above

openssl req -x509 -nodes -newkey rsa:4096 -subj /CN=YOURHOSTNAME -keyout /etc/ssl/indico/indico.key -out /etc/ssl/indico/indico.crt

While a self-signed certificate works for testing, it is not suitable for a production system. You can either buy a certificate from any commercial certification authority or get a free one from Let’s Encrypt.


There’s an optional step later in this guide to get a certificate from Let’s Encrypt. We can’t do it right now since the Apache config references a directory yet to be created, which prevents Apache from starting.

6. Configure SELinux

Indico works fine with SELinux enabled, but you need to load a custom SELinux module to tell SELinux about Indico’s files and how they should be handled.

cat > /tmp/indico.cil <<'EOF'
; define custom type that logrotate can access
(type indico_log_t)
(typeattributeset file_type (indico_log_t))
(typeattributeset logfile (indico_log_t))
(roletype object_r indico_log_t)

; allow logrotate to reload systemd services
(allow logrotate_t init_t (service (start)))
(allow logrotate_t policykit_t (dbus (send_msg)))
(allow policykit_t logrotate_t (dbus (send_msg)))

; make sure the uwsgi socket is writable by the webserver
(typetransition unconfined_service_t usr_t sock_file "uwsgi.sock" httpd_sys_rw_content_t)
(filecon "/opt/indico/web/uwsgi\.sock" socket (system_u object_r httpd_sys_rw_content_t ((s0)(s0))))

; let apache connect to uwsgi
(allow httpd_t unconfined_service_t (unix_stream_socket (connectto)))

; set proper types for our log dirs
(filecon "/opt/indico/log(/.*)?" any (system_u object_r indico_log_t ((s0)(s0))))
(filecon "/opt/indico/log/apache(/.*)?" any (system_u object_r httpd_log_t ((s0)(s0))))
semodule -i /tmp/indico.cil

7. Install Indico

Celery runs as a background daemon. Add a systemd unit file for it:

cat > /etc/systemd/system/indico-celery.service <<'EOF'
Description=Indico Celery

ExecStart=/opt/indico/.venv/bin/indico celery worker -B


systemctl daemon-reload

Now create a user that will be used to run Indico and switch to it:

useradd -rm -g apache -d /opt/indico -s /bin/bash indico
su - indico

The first thing to do is installing pyenv - we use it to install the latest Python version as not all Linux distributions include it and like this Indico can benefit from the latest Python features.

curl -L https://github.com/pyenv/pyenv-installer/raw/master/bin/pyenv-installer | bash

cat >> ~/.bashrc <<'EOF'
export PATH="/opt/indico/.pyenv/bin:$PATH"
eval "$(pyenv init --path)"
eval "$(pyenv init -)"

source ~/.bashrc

You are now ready to install Python 3.12:

pyenv install 3.12
pyenv global 3.12

This may take a while since pyenv needs to compile the specified Python version. Once done, you may want to use python -V to confirm that you are indeed using the version you just installed.

You are now ready to install Indico:

python -m venv --upgrade-deps --prompt indico ~/.venv
source ~/.venv/bin/activate
export PATH="$PATH:/usr/pgsql-16/bin"
echo 'source ~/.venv/bin/activate' >> ~/.bashrc
pip install setuptools wheel
pip install uwsgi
pip install indico

8. Configure Indico

Once Indico is installed, you can run the configuration wizard. You can keep the defaults for most options, but make sure to use https://YOURHOSTNAME when prompted for the Indico URL. Also specify valid email addresses when asked and enter a valid SMTP server Indico can use to send emails. When asked for the default timezone make sure this is the main time zone used in your Indico instance.

indico setup wizard

Now finish setting up the directory structure and permissions:

mkdir ~/log/apache
chmod go-rwx ~/* ~/.[^.]*
chmod 710 ~/ ~/archive ~/cache ~/log ~/tmp
chmod 750 ~/web ~/.venv
chmod g+w ~/log/apache
restorecon -R ~/
echo -e "\nSTATIC_FILE_METHOD = 'xsendfile'" >> ~/etc/indico.conf

9. Create database schema

Finally you can create the database schema and switch back to root:

indico db prepare

10. Launch Indico

You can now start Indico and set it up to start automatically when the server is rebooted:

systemctl restart httpd.service indico-celery.service indico-uwsgi.service
systemctl enable httpd.service postgresql-16.service redis.service indico-celery.service indico-uwsgi.service

11. Optional: Get a Certificate from Let’s Encrypt

To avoid ugly TLS warnings in your browsers, the easiest option is to get a free certificate from Let’s Encrypt. We also enable the cronjob to renew it automatically:

dnf install -y certbot python3-certbot-apache
certbot --apache --no-redirect --staple-ocsp -d YOURHOSTNAME
rm -f /etc/ssl/indico/indico.*
systemctl start certbot-renew.timer
systemctl enable certbot-renew.timer

12. Create an Indico user

Access https://YOURHOSTNAME in your browser and follow the steps displayed there to create your initial user.

13. Install TeXLive

Follow the LaTeX install guide to install TeXLive so Indico can generate PDF files in various places.

Optional: Shibboleth

If your organization uses Shibboleth/SAML-based SSO, follow these steps to use it in Indico:

1. Install Shibboleth

Add the Shibboleth repository:

curl -fsSL -o /etc/yum.repos.d/shibboleth.repo 'https://shibboleth.net/cgi-bin/sp_repo.cgi?platform=rockylinux9'

Now install Shibboleth itself. When prompted to accept the GPG key of the Shibboleth repo, confirm the prompt.

setsebool httpd_can_network_connect 1
dnf install -y shibboleth xmltooling-schemas opensaml-schemas

2. Configure Shibboleth

This is outside the scope of this documentation and depends on your environment (Shibboleth, ADFS, etc). Please contact whoever runs your SSO infrastructure if you need assistance.

3. Enable Shibboleth in Apache

Add the following code to your /etc/httpd/conf.d/indico.conf right before the AliasMatch lines:

<LocationMatch "^(/Shibboleth\.sso|/login/shib-sso/shibboleth)">
    AuthType shibboleth
    ShibRequestSetting requireSession 1
    ShibExportAssertion Off
    Require valid-user

4. Enable Shibboleth in Indico

Add the following code to your /opt/indico/etc/indico.conf:

    'shib-sso': {
        'type': 'shibboleth',
        'title': 'SSO',
        'attrs_prefix': 'ADFS_',
        'callback_uri': '/login/shib-sso/shibboleth',
        # 'logout_uri': 'https://login.yourcompany.tld/logout'
    'shib-sso': {
        'type': 'shibboleth',
        'title': 'SSO',
        'identifier_field': 'ADFS_LOGIN',
        'mapping': {
            'affiliation': 'ADFS_HOMEINSTITUTE',
            'first_name': 'ADFS_FIRSTNAME',
            'last_name': 'ADFS_LASTNAME',
            'email': 'ADFS_EMAIL',
            'phone': 'ADFS_PHONENUMBER'
        'trusted_email': True

The values for attrs_prefix, mapping and identifier_field may be different in your environment. Uncomment and set logout_uri if your SSO infrastructure provides a logout URL (usually used to log you out from all applications).

If you only want to use SSO, without allowing people to login locally using username/password, disable it by setting LOCAL_IDENTITIES = False in indico.conf.


We assume that emails received from SSO are already validated. If this is not the case, make sure to disable trusted_email which will require email validation in Indico when logging in for the first time. Otherwise people could take over the account of someone else by using their email address!


The example config is rather simple and only accesses data from SSO during login. This is not sufficient for advanced features such as automatic synchronization of names, affiliations and phone numbers or using centrally managed groups. To use these features, you need to use e.g. the LDAP identity provider and use the information received via SSO to retrieve the user details from LDAP. If you need assistance with this, feel free to ask us on IRC (#indico @ Libera.Chat) or the forum.