post_install() {
    if ! getent passwd confluence > /dev/null; then
        useradd -r confluence
    fi

    chown -R confluence:confluence /opt/atlassian-confluence/{logs,temp,webapps,work,conf} /var/opt/atlassian-confluence
}

pre_upgrade() {
    systemctl stop confluence.service
}

post_upgrade() {
    chown -R confluence:confluence /opt/atlassian-confluence/{logs,temp,webapps,work,conf} /var/opt/atlassian-confluence
    systemctl start confluence.service
}