diff --git a/collectd/README.md b/collectd/README.md
index 69cd7ac..c87c851 100644
--- a/collectd/README.md
+++ b/collectd/README.md
@@ -5,6 +5,48 @@ collectd
 and provides mechanisms to store the values in a variety of ways, for example
 in RRD files.
 
+## directory tree
+
+```
+~/fig/collectd/
+├── collectd/
+│   ├── collectd.conf
+│   └── conf.d/
+│       └── network.conf
+└── docker-compose.yml
+```
+
+## config files
+
+collectd.conf
+
+```
+Hostname "localhost"
+
+FQDNLookup false
+Interval 10
+Timeout 2
+ReadThreads 5
+WriteThreads 5
+
+LoadPlugin cpu
+LoadPlugin interface
+LoadPlugin load
+LoadPlugin memory
+
+Include "/etc/collectd/conf.d/*.conf"
+```
+
+network.conf
+
+```
+LoadPlugin network
+
+<Plugin "network">
+  Server "influxdb" "8096"
+</Plugin>
+```
+
 ## docker-compose.yml
 
 ```
@@ -12,5 +54,6 @@ collectd:
   image: vimagick/collectd
   volumes:
     - ./collectd:/etc/collectd
+  pid: host
   restart: always
 ```
diff --git a/collectd/docker-compose.yml b/collectd/docker-compose.yml
index cf3d485..80fcdbb 100644
--- a/collectd/docker-compose.yml
+++ b/collectd/docker-compose.yml
@@ -2,4 +2,5 @@ collectd:
   image: vimagick/collectd
   volumes:
     - ./collectd:/etc/collectd
+  pid: host
   restart: always