#!/bin/bash

set -eux

install-packages rabbitmq-server

# Ensure we leave symlinks in place for RabbitMQ state paths
register-state-path --leave-symlink /var/lib/rabbitmq
register-state-path --leave-symlink /var/log/rabbitmq

FILES="$(dirname $0)/../files"

# Note(jang): the rabbitmq-server service is installed, but not started, since
# the first run of os-collect-config is required to configure it properly.

# In Ubuntu rabbit's default init.d script is broken.
if [ "$DISTRO_NAME" = "ubuntu" ] || [ "$DISTRO_NAME" = "debian" -a "$DIB_INIT_SYSTEM" = "upstart" ]; then
    update-rc.d -f rabbitmq-server remove
    rm /etc/init.d/rabbitmq-server

    # Note(jang) The os-svc-daemon script has too many assumptions baked into it
    # that it'll be running a venv-based service to use directly. Install an upstart
    # configuration that's compatible with os-svc-enable and os-svc-restart

    FILE=/etc/init/rabbitmq-server.conf
    install -g root -o root -m 0755 "${FILES}${FILE}" "${FILE}"
fi

if [ "$DIB_INIT_SYSTEM" = "systemd" ]; then
    # Delay the rc-local.service start-up until rabbitmq-server.service is started up
    sed -i 's/\[Unit\]/\[Unit\]\nBefore=rc-local.service/g' /lib/systemd/system/rabbitmq-server.service

    # Respawn rabbitmq-server in case the process exits with an nonzero exit code
    sed -i 's/\[Service\]/\[Service\]\nRestart=on-failure/g' /lib/systemd/system/rabbitmq-server.service
fi

FILE=/etc/rabbitmq/rabbitmq-env.conf
install -g root -o root -m 0755 "${FILES}${FILE}" "${FILE}"

# Enable ulimits in pam if needed
PAM_FILE=/etc/pam.d/su
sed -i '/# session.*pam_limits\.so/s/# //' ${PAM_FILE}

# Reserve the cluster port (61000) from the ephemeral port range.
sysctl-append-value net.ipv4.ip_local_reserved_ports 61000