docker-davrods

An Apache WebDAV interface to iRODS in Docker

This work is based on UtrechtUniversity/davrods.

Davrods provides access to iRODS servers using the WebDAV protocol. It is a bridge between the WebDAV protocol and the iRODS API, implemented as an Apache HTTPD module.
Davrods leverages the Apache server implementation of the WebDAV protocol, mod_dav, for compliance with the WebDAV Class 2 standard.

Supported tags and respective Dockerfile links

4.2.2, latest (4.2.2/Dockerfile)
4.2.1 (4.2.1/Dockerfile)

Pull image from dockerhub

$ docker pull renci/docker-davrods:4.2.2

Build locally

$ cd 4.2.2
$ docker build -t docker-davrods:4.2.2 .

Usage

Provide the iRODS, VirtualHost and SSL settings to the docker run or docker-compose call using environment variables or an environment file.

Possible environment variables (and their default values):

 # irods_environment.json
 IRODS_HOST='localhost'
 IRODS_PORT=1247
 IRODS_DEFAULT_RESOURCE=''
 IRODS_HOME='/tempZone/home/rods'
 IRODS_CWD='/tempZone/home/rods'
 IRODS_USER_NAME='rods'
 IRODS_ZONE_NAME='tempZone'
 IRODS_CLIENT_SERVER_NEGOTIATION='request_server_negotiation'
 IRODS_CLIENT_SERVER_POLICY='CS_NEG_DONT_CARE'
 IRODS_ENCRYPTION_KEY_SIZE=32
 IRODS_ENCRYPTION_SALT_SIZE=8
 IRODS_ENCRYPTION_NUM_HASH_ROUNDS=16
 IRODS_ENCRYPTION_ALGORITHM='AES-256-CBC'
 IRODS_DEFAULT_HASH_SCHEME='SHA256'
 IRODS_MATCH_HASH_POLICY='compatible'
 IRODS_SERVER_CONTROL_PLANE_PORT=1248
 IRODS_SERVER_CONTROL_PLANE_KEY='TEMPORARY__32byte_ctrl_plane_key'
 IRODS_SERVER_CONTROL_PLANE_ENCRYPTION_NUM_HASH_ROUNDS=16
 IRODS_SERVER_CONTROL_PLANE_ENCRYPTION_ALGORITHM='AES-256-CBC'
 IRODS_MAXIMUM_SIZE_FOR_SINGLE_BUFFER_IN_MEGABYTES=32
 IRODS_DEFAULT_NUMBER_OF_TRANSFER_THREADS=4
 IRODS_TRANSFER_BUFFER_SIZE_FOR_PARALLEL_TRANSFER_IN_MEGABYTES=4
 IRODS_SSL_VERIFY_SERVER='hostname'
 # VirtualHost settings
 VHOST_SERVER_NAME='dav.example.com'
 VHOST_LOCATION='/'
 VHOST_DAV_RODS_SERVER='localhost 1247'
 VHOST_DAV_RODS_ZONE='tempZone'
 VHOST_DAV_RODS_AUTH_SCHEME='Native'
 VHOST_DAV_RODS_EXPOSED_ROOT='User'
 # SSL settings
 SSL_ENGINE='off'
 SSL_CERTIFICATE_FILE=''
 SSL_CERTIFICATE_KEY_FILE=''

Minimally the following variables are likely candidates to be updated prior to running against a non-generic deployment of iRODS.

IRODS_CLIENT_SERVER_POLICY=CS_NEG_REFUSE
IRODS_SERVER_CONTROL_PLANE_KEY=<USE_REAL_KEY_FROM_IRODS_SERVER>
VHOST_SERVER_NAME=<FQDN_OR_IP_OF_VHOST>
VHOST_DAV_RODS_SERVER=<FQDN_OR_IP_OF_IRODS_SERVER> 1247
VHOST_DAV_RODS_ZONE=<IRODS_ZONE_NAME>

Run a davrods container at http://localhost:8080 (replacing <USE_REAL_KEY_FROM_IRODS_SERVER>, <FQDN_OR_IP_OF_IRODS_SERVER>, and <IRODS_ZONE_NAME> with appropriate values):

 docker run -d --name davrods \
 	-e IRODS_CLIENT_SERVER_POLICY=CS_NEG_REFUSE
 	-e IRODS_SERVER_CONTROL_PLANE_KEY=<USE_REAL_KEY_FROM_IRODS_SERVER>
 	-e VHOST_SERVER_NAME=localhost
 	-e VHOST_DAV_RODS_SERVER='<FQDN_OR_IP_OF_IRODS_SERVER> 1247'
 	-e VHOST_DAV_RODS_ZONE=<IRODS_ZONE_NAME>
 	-p 8080:80 \
 	renci/docker-davrods:4.2.2

Using the same environment variables as above, but placed into a file named sample.env.

 docker run -d --name davrods \
 	--env-file sample.env \
 	-p 8080:80 \
 	renci/docker-davrods:4.2.2

Example of running environment

Configure/Build/Run

The provided docker-compose.yml file specifies an example using four containers.

davrods
- DavRODS server running at http://localhost:8080/tempzone
- User: rods, Pass: rods
centos-davfs2
- CentOS 7 based data container with webdav mount at /mnt/davrods
ubuntu-davfs2
- Ubuntu 16.04 based data container with webdav mount at /mnt/davrods
irods
- iRODS Catalog Provider to support DavRODS

Configure:

Under the environment: section of the docker-compose.yml file we can set a few parameters to be used by the container serving DavRODS. We want to ensure that the IRODS_* settings correspond to what is found in the iRODS server we'll be attaching to and so set the connection parameters for the Virtual Host that will run in Apache. Here we are choosing to default to starting at the Zone level of the iRODS deployment. The default here would generally be User, and a description of these settings can be found in davrods-vhost.conf.

...
environment:
  - IRODS_CLIENT_SERVER_POLICY=CS_NEG_REFUSE
  - IRODS_SERVER_CONTROL_PLANE_KEY=TEMPORARY__32byte_ctrl_plane_key
  - VHOST_SERVER_NAME=davrods.local
  - VHOST_LOCATION=/tempzone
  - VHOST_DAV_RODS_SERVER=irods 1247
  - VHOST_DAV_RODS_ZONE=tempZone
  - VHOST_DAV_RODS_AUTH_SCHEME=Native
  - VHOST_DAV_RODS_EXPOSED_ROOT=Zone
...

Build:

docker-compose build

Run:

If you wish to view STDOUT of the containers as they run, do not use the -d parameter.

docker-compose up -d

Verify containers are running:

$ docker-compose ps
    Name                   Command               State                                          Ports
--------------------------------------------------------------------------------------------------------------------------------------------
centos-davfs2   /usr/local/bin/tini -- /do ...   Up      443/tcp, 80/tcp
davrods         /usr/local/bin/tini -- /do ...   Up      1247/tcp, 0.0.0.0:8443->443/tcp, 0.0.0.0:8080->80/tcp
irods           /irods-docker-entrypoint.s ...   Up      1247/tcp, 1248/tcp, 20000/tcp, 20001/tcp, 20002/tcp, 20003/tcp, 20004/tcp,
                                                         20005/tcp, 20006/tcp, 20007/tcp, 20008/tcp, 20009/tcp, 20010/tcp, 20011/tcp,
                                                         ...
                                                         20187/tcp, 20188/tcp, 20189/tcp, 20190/tcp, 20191/tcp, 20192/tcp, 20193/tcp,
                                                         20194/tcp, 20195/tcp, 20196/tcp, 20197/tcp, 20198/tcp, 20199/tcp, 5432/tcp
ubuntu-davfs2   /usr/local/bin/tini -- /do ...   Up      443/tcp, 80/tcp

Test DavRODS connection via browser: http://localhost:8080/tempzone

Username: rods
Password: rods

Once signed in as the iRODS rods user, you should see an empty directory listing.

This can also be confirmed from the irods, centos-davfs2 and ubuntu-davfs2 docker containers.

From irods as the irods user:

 $ docker exec -u irods irods ils /tempZone
 /tempZone:
   C- /tempZone/home
   C- /tempZone/trash

From centos-davfs2:

 $ docker exec centos-davfs2 ls -alh /mnt/davrods
 total 512
 drwxr-xr-x 5 root root 136 Feb  2 18:28 .
 drwxr-xr-x 4 root root   0 Feb  2 18:28 home
 drwx------ 2 root root   0 Feb  2 18:28 lost+found
 drwxr-xr-x 3 root root   0 Feb  2 18:28 trash

From ubuntu-davfs2:

 $ docker exec ubuntu-davfs2 ls -alh /mnt/davrods
 total 512
 drwxr-xr-x 5 root root 136 Feb  2 18:28 .
 drwxr-xr-x 4 root root   0 Feb  2 18:28 home
 drwx------ 2 root root   0 Feb  2 18:28 lost+found
 drwxr-xr-x 3 root root   0 Feb  2 18:28 trash

Add data

Validate that data can be added to iRODS and be accessible to available mount points.

From the irods container: Get onto the irods container as the irods user and add a file to /tempZone/home/rods

Use iput to add the VERSION.json file to /tempZone/home/rods

 $ docker exec -ti -u irods irods /bin/bash
 irods@irods:~$ ls
 clients		       iRODS	 msiExecCmd_bin  test
 config		       irodsctl  packaging	 VERSION.json
 configuration_schemas  log	 scripts	 VERSION.json.dist
 irods@irods:~$ iput VERSION.json
 irods@irods:~$ ils -Lr /tempZone/home/rods
 /tempZone/home/rods:
   rods              0 demoResc          224 2018-02-02.18:45 & VERSION.json
         generic    /var/lib/irods/iRODS/Vault/home/rods/VERSION.json

Verify in the browser by navigating to http://localhost:8080/tempzone/home/rods/

Verify on the centos-davfs2 container

 $ docker exec centos-davfs2 ls -alh /mnt/davrods/home/rods
 total 1.0K
 drwxr-xr-x 2 root root 104 Feb  2 18:28 .
 drwxr-xr-x 4 root root   0 Feb  2 18:28 ..
 -rw-r--r-- 1 root root 224 Feb  2 18:45 VERSION.json

Verify on the ubuntu-davfs2 container

 $ docker exec ubuntu-davfs2 ls -alh /mnt/davrods/home/rods
 total 1.0K
 drwxr-xr-x 2 root root 104 Feb  2 18:28 .
 drwxr-xr-x 4 root root   0 Feb  2 18:28 ..
 -rw-r--r-- 1 root root 224 Feb  2 18:45 VERSION.json

From the centos-davfs2 container: Get onto the datamount container as the root user, generate a 10 MB file, and copy it to the /mnt/davrods/home/rods directory

Use dd to create a 10 MB file and cp to copy it

 $ docker exec -ti centos-davfs2 /bin/bash
 [root@centos-davfs2 /]# dd if=/dev/zero of=output.dat  bs=1M  count=10
 10+0 records in
 10+0 records out
 10485760 bytes (10 MB) copied, 0.00735935 s, 1.4 GB/s
 [root@centos-davfs2 /]# ls -alh output.dat
 -rw-r--r-- 1 root root 10M Feb  2 18:51 output.dat
 [root@centos-davfs2 /]# cp output.dat /mnt/davrods/home/rods/
 [root@centos-davfs2 /]# ls -alh /mnt/davrods/home/rods/
 total 11M
 drwxr-xr-x 2 root root 144 Feb  2 18:28 .
 drwxr-xr-x 4 root root 128 Feb  2 18:28 ..
 -rw-r--r-- 1 root root 224 Feb  2 18:45 VERSION.json
 -rw-r--r-- 1 root root 10M Feb  2 18:52 output.dat

Verify from the irods container

 $ docker exec -u irods irods ils -Lr /tempZone/home/rods
 /tempZone/home/rods:
   rods              0 demoResc     10485760 2018-02-02.18:52 & output.dat
         generic    /var/lib/irods/iRODS/Vault/home/rods/output.dat
   rods              0 demoResc          224 2018-02-02.18:45 & VERSION.json
         generic    /var/lib/irods/iRODS/Vault/home/rods/VERSION.json

Verify from the ubuntu-davfs2 container

$ docker exec ubuntu-davfs2 ls -alh /mnt/davrods/home/rods/
total 11M
drwxr-xr-x 2 root root 144 Feb  2 18:28 .
drwxr-xr-x 4 root root   0 Feb  2 18:28 ..
-rw-r--r-- 1 root root 224 Feb  2 18:45 VERSION.json
-rw-r--r-- 1 root root 10M Feb  2 18:52 output.dat

Verify in the browser by refreshing it

Download output.dat from browser to local machine

Verify size of file on local machine

 $ ls -alh ~/Downloads/output.dat
 -rw-rw-rw-@ 1 stealey  staff    10M Feb  2 13:56 /Users/stealey/Downloads/output.dat

Clean up

Clean up the environment using docker-compose

$ docker-compose stop
Stopping ubuntu-davfs2 ... done
Stopping centos-davfs2 ... done
Stopping davrods       ... done
Stopping irods         ... done

$ docker-compose rm -f
Going to remove ubuntu-davfs2, centos-davfs2, davrods, irods
Removing ubuntu-davfs2 ... done
Removing centos-davfs2 ... done
Removing davrods       ... done
Removing irods         ... done

$ docker-compose ps
Name   Command   State   Ports
------------------------------

Environment variable descriptions

This implementation makes use of many environment varialbes to set or modify the contents of /etc/httpd/irods/irods_environment.json and /etc/httpd/conf.d/davrods.conf

The iRODS environment file:
- The binary distribution installs the irods_environment.json file in /etc/httpd/irods. In most iRODS setups, this file can be used as is.
- Importantly, the first seven options (from irods_host up to and including irods_zone_name) are not read from this file. These settings are taken from their equivalent Davrods configuration directives in the vhost file instead.
- The options in the provided environment file starting from irods_client_server_negotiation do affect the behaviour of Davrods. See the official documentation for help on these settings at: https://docs.irods.org/4.2.2/system_overview/configuration/#irodsirods_environmentjson
- For instance, if you want Davrods to connect to iRODS 3.3.1, the irods_client_server_negotiation option must be set to "none".
- The default settings are based on the source repository
HTTPD vhost configuration
- The davrods.conf file is copied at build time and then modified at runtime in the Apache /etc/httpd/conf.d directory. Attributes outside of the scope altered by the runtime script can be altered directly in the source file prior to building the image.
- The Davrods RPM distribution installs two vhost template files:
  - /etc/httpd/conf.d/davrods-vhost.conf
  - /etc/httpd/conf.d/davrods-anonymous-vhost.conf
- These files are provided completely commented out. To enable either configuration, simply remove the first column of # signs, and then tune the settings to your needs.
- The normal vhost configuration (1) provides sane defaults for authenticated access.
- The anonymous vhost configuration (2) allows password-less public access using the anonymous iRODS account.
- You can enable both configurations simultaneously, as long as their ServerName values are unique (for example, you might use dav.example.com for authenticated access and public.dav.example.com for anonymous access).

Default settings:

# irods_environment.json
IRODS_HOST='localhost'
IRODS_PORT=1247
IRODS_DEFAULT_RESOURCE=''
IRODS_HOME='/tempZone/home/rods'
IRODS_CWD='/tempZone/home/rods'
IRODS_USER_NAME='rods'
IRODS_ZONE_NAME='tempZone'
IRODS_CLIENT_SERVER_NEGOTIATION='request_server_negotiation'
IRODS_CLIENT_SERVER_POLICY='CS_NEG_DONT_CARE'
IRODS_ENCRYPTION_KEY_SIZE=32
IRODS_ENCRYPTION_SALT_SIZE=8
IRODS_ENCRYPTION_NUM_HASH_ROUNDS=16
IRODS_ENCRYPTION_ALGORITHM='AES-256-CBC'
IRODS_DEFAULT_HASH_SCHEME='SHA256'
IRODS_MATCH_HASH_POLICY='compatible'
IRODS_SERVER_CONTROL_PLANE_PORT=1248
IRODS_SERVER_CONTROL_PLANE_KEY='TEMPORARY__32byte_ctrl_plane_key'
IRODS_SERVER_CONTROL_PLANE_ENCRYPTION_NUM_HASH_ROUNDS=16
IRODS_SERVER_CONTROL_PLANE_ENCRYPTION_ALGORITHM='AES-256-CBC'
IRODS_MAXIMUM_SIZE_FOR_SINGLE_BUFFER_IN_MEGABYTES=32
IRODS_DEFAULT_NUMBER_OF_TRANSFER_THREADS=4
IRODS_TRANSFER_BUFFER_SIZE_FOR_PARALLEL_TRANSFER_IN_MEGABYTES=4
IRODS_SSL_VERIFY_SERVER='hostname'
# SSL settings
SSL_ENGINE='off'
SSL_CERTIFICATE_FILE=''
SSL_CERTIFICATE_KEY_FILE=''
# VirtualHost settings
VHOST_SERVER_NAME='dav.example.com'
VHOST_LOCATION='/'
VHOST_DAV_RODS_SERVER='localhost 1247'
VHOST_DAV_RODS_ZONE='tempZone'
VHOST_DAV_RODS_AUTH_SCHEME='Native'
VHOST_DAV_RODS_EXPOSED_ROOT='User'

Default settings can be overwritten by:

Altering the Dockerfile or source files directly prior to build
Adding -e ENV_VAR_KEY=ENV_VAR_VALUE to the docker run call (or corresponding docker-compose.yml file)
Adding -env-file ENV_FILE_NAME pointing to a file with one or more variable definitions to the docker run call (or corresponding docker-compose.yml file)

WebDAV mount instructions

Web Distributed Authoring and Versioning (WebDAV) is an extension of the Hypertext Transfer Protocol (HTTP) that allows clients to perform remote Web content authoring operations.

Linux Note:

Uses davfs2 package.
Ubuntu warning: The file /sbin/mount.davfs must have the SUID bit set if you want to allow unprivileged (non-root) users to mount WebDAV resources.

If using Docker, the following run parameters should be set

 --privileged 
 --cap-add=SYS_ADMIN 
 --device /dev/fuse

macOS

Open the Connect to Server dialogue

Finder: Go > Connect to Server, or command + k

Set

Server Address: http://localhost:8080/tempzone

Connect:

Name: rods
Password: rods

Access

Volume mount from Finder named tempzone

Windows

TODO

CentOS 7

Install:

sudo yum install epel-release
sudo yum makecache fast
sudo yum install davfs2

Mount:

Format: mount -t davfs http(s)://addres:<port>/path /mount/point
- REMOTE_URL - URL to reflect as local mount point, i.e. http://localhost:8080/tempzone/
- LOCAL_MOUNT - local mount point, i.e. /mnt/davrods
```
 sudo mkdir LOCAL_MOUNT
 sudo mount -t davfs REMOTE_URL LOCAL_MOUNT
```

Unmount:

Format: umount -t davfs /mount/point
- LOCAL_MOUNT - local mount point, i.e. /mnt/davrods
```
 sudo umount -t davfs LOCAL_MOUNT
```

Storing credentials:

Create a secrets file to store credentials for a WebDAV-service using ~/.davfs2/secrets for user, and /etc/davfs2/secrets for root:
- Format:
```
 https://webdav.example/path davusername davpassword
```
Make sure the secrets file contains the correct permissions, for root mounting:
```
 # chmod 600 /etc/davfs2/secrets
 # chown root:root /etc/davfs2/secrets
```
And for user mounting:
```
 $ chmod 600 ~/.davfs2/secrets
```

See centos-davfs2/Dockerfile for example implementation.

Ubuntu 16.04

Install:

sudo apt install davfs2

Mount:

Format: mount -t davfs http(s)://addres:<port>/path /mount/point
- REMOTE_URL - URL to reflect as local mount point, i.e. http://localhost:8080/tempzone/
- LOCAL_MOUNT - local mount point, i.e. /mnt/davrods
```
 sudo mkdir LOCAL_MOUNT
 sudo mount -t davfs REMOTE_URL LOCAL_MOUNT
```

Unmount:

Format: umount -t davfs /mount/point
- LOCAL_MOUNT - local mount point, i.e. /mnt/davrods
```
 sudo umount -t davfs LOCAL_MOUNT
```

Storing credentials:

Create a secrets file to store credentials for a WebDAV-service using ~/.davfs2/secrets for user, and /etc/davfs2/secrets for root:
- Format:
```
 https://webdav.example/path davusername davpassword
```
Make sure the secrets file contains the correct permissions, for root mounting:
```
 # chmod 600 /etc/davfs2/secrets
 # chown root:root /etc/davfs2/secrets
```
And for user mounting:
```
 $ chmod 600 ~/.davfs2/secrets
```

See ubuntu-davfs2/Dockerfile for example implementation.

SSL

To avoid cleartext password communication we strongly recommend to enable DavRODS only over SSL.

Example: Serving NWM data

Goal - Expose NWM data starting at /nwmZone/home/nwm/data/nomads as https://apps-ffs.renci.org:8443/nwm/daily

Ensure a valid certificate pair exists on the server and is shareable via volume mount with the container.

We'll map /root/cert to /ssl_cert of the container which contains

star_renci_org.crt: certificate
star_renci_org.key: key

Update the docker-compose.yml file

IRODS_* and VHOST_* settings get applied
SSL_ENGINE= set to on
SSL_CERTIFICATE_FILE= set to /ssl_cert/star_renci_org.crt

SSL_CERTIFICATE_KEY_FILE= set to /ssl_cert/star_renci_org.key

 version: '3.1'
 services:
   davrods:
     image: renci/docker-davrods:4.2.2
     container_name: davrods
     hostname: davrods-local
     ports:
       - '8080:80'
       - '8443:443'
     environment:
       - IRODS_CWD=/nwmZone/home/nwm/data/nomads
       - IRODS_CLIENT_SERVER_POLICY=CS_NEG_REFUSE
       - IRODS_SERVER_CONTROL_PLANE_KEY=<USE_REAL_KEY_FROM_IRODS_SERVER>
       - VHOST_SERVER_NAME=apps-ffs.renci.org
       - VHOST_LOCATION=/nwm/daily
       - VHOST_DAV_RODS_SERVER=nwm.renci.org 1247
       - VHOST_DAV_RODS_ZONE=nwmZone
       - VHOST_DAV_RODS_AUTH_SCHEME=Native
       - VHOST_DAV_RODS_EXPOSED_ROOT=/nwmZone/home/nwm/data/nomads
       - SSL_ENGINE=on
       - SSL_CERTIFICATE_FILE=/ssl_cert/star_renci_org.crt
       - SSL_CERTIFICATE_KEY_FILE=/ssl_cert/star_renci_org.key
     restart: always
     volumes:
       - './4.2.2/davrods_conf.d:/etc/httpd/davrods_conf.d'
       - '/root/cert:/ssl_cert'

Run the container using docker-compose

docker-compose up -d

Validate use of SSL certs at: https://apps-ffs.renci.org:8443/nwm/daily

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docker-davrods

An Apache WebDAV interface to iRODS in Docker

Supported tags and respective Dockerfile links

Pull image from dockerhub

Build locally

Contents

Usage

Example of running environment

Configure/Build/Run

Add data

Clean up

Environment variable descriptions

WebDAV mount instructions

macOS

Windows

CentOS 7

Ubuntu 16.04

SSL

Example: Serving NWM data

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Name		Name	Last commit message	Last commit date
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4.2.1		4.2.1
4.2.2		4.2.2
example		example
.gitignore		.gitignore
LICENSE		LICENSE
README.md		README.md
docker-compose.yml		docker-compose.yml

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docker-davrods

An Apache WebDAV interface to iRODS in Docker

Supported tags and respective Dockerfile links

Pull image from dockerhub

Build locally

Contents

Usage

Example of running environment

Configure/Build/Run

Add data

Clean up

Environment variable descriptions

WebDAV mount instructions

macOS

Windows

CentOS 7

Ubuntu 16.04

SSL

Example: Serving NWM data

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