diff --git a/alpine/ping/Dockerfile b/alpine/ping/Dockerfile
new file mode 100644
index 0000000..b52e81e
--- /dev/null
+++ b/alpine/ping/Dockerfile
@@ -0,0 +1,5 @@
+FROM alpine:latest
+LABEL description="ping test on alpine"
+LABEL maintainer="racken@one27.cf"
+ENV container docker
+CMD ["ping", "-qi5", "210.0.248.38"]
diff --git a/rocky/observium/.dockerignore b/rocky/observium/.dockerignore
new file mode 100644
index 0000000..ce8a093
--- /dev/null
+++ b/rocky/observium/.dockerignore
@@ -0,0 +1,2 @@
+app.data/
+app.data.tgz
diff --git a/rocky/observium/Dockerfile b/rocky/observium/Dockerfile
new file mode 100644
index 0000000..2148c6a
--- /dev/null
+++ b/rocky/observium/Dockerfile
@@ -0,0 +1,29 @@
+FROM rockylinux/rockylinux
+LABEL description="Observium 19.8.10000 on RockyLinux"
+LABEL maintainer="xpk@headdesk.me"
+LABEL notes="Initial user/pass = observium/observium. Mount /opt/observium and /var/lib/mysql on persistent storage."
+LABEL exposed-port="80"
+ENV container docker
+RUN dnf -y install epel-release 
+RUN dnf install -y https://rpms.remirepo.net/enterprise/remi-release-8.rpm
+RUN dnf module enable php:remi-8.1 -y
+# RUN dnf -y install http://yum.opennms.org/repofiles/opennms-repo-stable-rhel7.noarch.rpm
+#RUN dnf -y install wget httpd php php-opcache php-mysqlnd php-gd php-posix php-pear cronie net-snmp net-snmp-utils fping mariadb rrdtool ipmitool graphviz ImageMagick php-json python3-PyMySQL libsodium libsodium-devel php-devel make supervisor --nobest
+RUN dnf -y install wget httpd php php-opcache php-mysqlnd php-gd php-sodium php-posix php-pear cronie net-snmp net-snmp-utils fping mariadb rrdtool ipmitool graphviz ImageMagick php-json python3-PyMySQL libsodium php-devel supervisor --nobest
+#RUN mysql_install_db -u mysql
+#RUN pecl install libsodium; echo "extension=sodium.so" > /etc/php.d/sodium.ini
+RUN ln -s /usr/bin/python3 /usr/bin/python; mkdir -p /opt/observium /run/supervisor /run/php-fpm
+WORKDIR /opt/observium
+# RUN wget -qq -O- http://www.observium.org/observium-community-latest.tar.gz | tar zxf - --strip-components=1
+# for upgrade, see upgrade.md
+COPY config.php /opt/observium/config.php
+COPY observium.ini /etc/supervisord.d/observium.ini
+COPY crontab /var/spool/cron/root
+#RUN mkdir -p /opt/observium/rrd /opt/observium/logs; chown apache:apache /opt/observium/{rrd,logs}
+RUN sed -i -e 's@/var/www/html@/opt/observium/html@g' -e 's/AllowOverride.*/AllowOverride All/g' /etc/httpd/conf/httpd.conf 
+#ADD initialise.sh /opt/observium/initialise.sh
+#RUN chmod 755 /opt/observium/initialise.sh && /opt/observium/initialise.sh
+# Add static route
+# RUN ip route add 192.168.167.0/24 via 192.168.86.2
+EXPOSE 80
+CMD ["/usr/bin/supervisord", "-n"]
diff --git a/rocky/observium/Dockerfile-freshinstall b/rocky/observium/Dockerfile-freshinstall
new file mode 100644
index 0000000..8927f3c
--- /dev/null
+++ b/rocky/observium/Dockerfile-freshinstall
@@ -0,0 +1,25 @@
+FROM centos:8
+LABEL description="Observium 19.8.10000 on CentOS8"
+LABEL maintainer="xpk@headdesk.me"
+LABEL notes="Initial user/pass = observium/observium. Mount /opt/observium and /var/lib/mysql on persistent storage."
+LABEL exposed-port="80"
+LABEL git="https://xpk.headdesk.me/git/centos8-observium"
+ENV container docker
+RUN yum -y install epel-release 
+RUN yum -y install http://yum.opennms.org/repofiles/opennms-repo-stable-rhel7.noarch.rpm
+RUN yum -y install wget httpd php php-opcache php-mysqlnd php-gd php-posix php-pear cronie net-snmp net-snmp-utils fping mariadb-server mariadb rrdtool ipmitool graphviz ImageMagick php-json python3-PyMySQL libsodium libsodium-devel php-devel make supervisor --nobest
+RUN mysql_install_db -u mysql
+RUN pecl install libsodium; echo "extension=sodium.so" > /etc/php.d/sodium.ini
+RUN ln -s /usr/bin/python3 /usr/bin/python; mkdir -p /opt/observium /run/supervisor /run/php-fpm
+WORKDIR /opt/observium
+RUN wget -qq -O- http://www.observium.org/observium-community-latest.tar.gz | tar zxf - --strip-components=1
+COPY config.php /opt/observium/config.php
+COPY observium.ini /etc/supervisord.d/observium.ini
+COPY crontab /var/spool/cron/root
+RUN mkdir -p /opt/observium/rrd /opt/observium/logs; chown apache:apache /opt/observium/{rrd,logs}
+RUN sed -i -e 's@/var/www/html@/opt/observium/html@g' /etc/httpd/conf/httpd.conf 
+RUN sed -i -e 's/AllowOverride.*/AllowOverride All/g' /etc/httpd/conf/httpd.conf
+ADD initialise.sh /opt/observium/initialise.sh
+RUN chmod 755 /opt/observium/initialise.sh && /opt/observium/initialise.sh
+EXPOSE 80
+CMD ["/usr/bin/supervisord", "-n"]
diff --git a/rocky/observium/build.sh b/rocky/observium/build.sh
new file mode 100755
index 0000000..5d29a99
--- /dev/null
+++ b/rocky/observium/build.sh
@@ -0,0 +1 @@
+docker build -t rocky/observium --network macvlan .
diff --git a/rocky/observium/config.php b/rocky/observium/config.php
new file mode 100644
index 0000000..c74f4d1
--- /dev/null
+++ b/rocky/observium/config.php
@@ -0,0 +1,37 @@
+<?php
+
+## Check http://www.observium.org/docs/config_options/ for documentation of possible settings
+
+## It's recommended that settings are edited in the web interface at /settings/ on your observium installation.
+## Authentication and Database settings must be hardcoded here because they need to work before you can reach the web-based configuration interface
+
+// Database config ---  This MUST be configured
+$config['db_extension'] = 'mysqli';
+$config['db_host']      = '192.168.86.10';
+$config['db_user']      = 'observium';
+$config['db_pass']      = '25d38c2b7ffa43d94621b578';
+$config['db_name']      = 'observium';
+
+// Base directory
+#$config['install_dir'] = "/opt/observium";
+
+// Default community list to use when adding/discovering
+$config['snmp']['community'] = array("public");
+
+// Authentication Model
+$config['auth_mechanism'] = "mysql";    // default, other options: ldap, http-auth, please see documentation for config help
+
+// Enable alerter
+// $config['poller-wrapper']['alerter'] = TRUE;
+
+//$config['web_show_disabled'] = FALSE;    // Show or not disabled devices on major pages.
+
+// Set up a default alerter (email to a single address)
+//$config['email']['default']        = "user@your-domain";
+//$config['email']['from']           = "Observium <observium@your-domain>";
+//$config['email']['default_only']   = TRUE;
+
+// End config.php
+
+$config['fping'] = "/usr/sbin/fping";
+$config['housekeeping']['rrd']['age'] = 5184000;
diff --git a/rocky/observium/crontab b/rocky/observium/crontab
new file mode 100644
index 0000000..4b632a9
--- /dev/null
+++ b/rocky/observium/crontab
@@ -0,0 +1,14 @@
+# Run a complete discovery of all devices once every 6 hours
+33 */6 * * * /opt/observium/discovery.php -h all >> /dev/null 2>&1
+
+# Run automated discovery of newly added devices every 3 minutes
+*/3 * * * * /opt/observium/discovery.php -h new >> /dev/null 2>&1
+
+# Run multithreaded poller wrapper every 5 minutes
+*/5 * * * * /opt/observium/poller-wrapper.py >> /dev/null 2>&1
+
+# Run housekeeping script daily for syslog, eventlog and alert log
+13 5 * * * /opt/observium/housekeeping.php -ysel
+
+# Run housekeeping script daily for rrds, ports, orphaned entries in the database and performance data
+47 4 * * * /opt/observium/housekeeping.php -yrptb
diff --git a/rocky/observium/initialise.sh b/rocky/observium/initialise.sh
new file mode 100644
index 0000000..0c98597
--- /dev/null
+++ b/rocky/observium/initialise.sh
@@ -0,0 +1,8 @@
+/usr/bin/pidproxy /run/mariadb/mariadb.pid /usr/bin/mysqld_safe --pid-file=/run/mariadb/mariadb.pid &
+mysql -Nse 'create database observium default charset utf8 collate utf8_general_ci;'
+mysql -Nse "create user observium@localhost identified by '25d38c2b7ffa43d94621b578';"
+mysql -Nse 'grant all on observium.* to observium@localhost;'
+mysql -Nse 'flush privileges;'
+cd /opt/observium
+./discovery.php -u
+./adduser.php observium observium 10
diff --git a/rocky/observium/observium.ini b/rocky/observium/observium.ini
new file mode 100644
index 0000000..f5dd515
--- /dev/null
+++ b/rocky/observium/observium.ini
@@ -0,0 +1,29 @@
+[program:httpd]
+command=/usr/sbin/apachectl -DFOREGROUND
+autostart=true
+autorestart=true
+killasgroup=true
+stopasgroup=true
+
+[program:phpfpm]
+command=/usr/sbin/php-fpm -c /etc/php-fpm.conf -F
+autostart=true
+autorestart=true
+
+#[program:mysql]
+#command=/usr/bin/pidproxy /run/mariadb/mariadb.pid /usr/bin/mysqld_safe --pid-file=/run/mariadb/mariadb.pid
+#autostart=true
+#autorestart=true
+
+[program:crond]
+command=/usr/sbin/crond -nsp
+autostart=true
+autorestart=true
+
+[program:staticroute]
+command=/sbin/ip r a 192.168.167.0/24 via 192.168.86.2
+autostart=true
+autorestart=false
+startretries=1
+startsecs = 0
+
diff --git a/rocky/observium/start.sh b/rocky/observium/start.sh
new file mode 100755
index 0000000..158ec27
--- /dev/null
+++ b/rocky/observium/start.sh
@@ -0,0 +1,5 @@
+docker run -d --name observium --network macvlan --ip=192.168.86.57 \
+--cap-add NET_ADMIN --cpus=2 \
+-v /my/container-config/centos8/observium/app.data:/opt/observium \
+-e TZ=Asia/Hong_Kong \
+--restart=always rocky/observium
diff --git a/rocky/observium/upgrade.md b/rocky/observium/upgrade.md
new file mode 100644
index 0000000..f6f6b22
--- /dev/null
+++ b/rocky/observium/upgrade.md
@@ -0,0 +1,3 @@
+# attach to container
+cd /opt/observium
+wget -qq -O- http://www.observium.org/observium-community-latest.tar.gz | tar zxf - --strip-components=1