Zerotier scipts

My collection of scrpts for ZeroTier virtual network. Nothing fancy just a place for me to dump my stuff before I forget it all.

ZeroTier is a distributed SDN switch build atop a encrypted P2P network. Learn more about ZeroTier here. You can either use the network controllers hosted by ZeroTier or set up your own standalone network controller if you're up for the extra effort.

Scripts:

• getnetworkmembers
• joinnetwork

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getnetworkmembers

This script pulls the all your ZeroTier networks (created by yourself) or networks shared with you. Each networkname, device member shortnames and IP addresses will be collected and output to a textfile suited for use with DNSMASQ. It can be be used with the addn-hosts= option in dnsmasq.conf (see an example here). The textfile or this script can also fairly easily be modified to append to /etc/hosts. There is also an option to only query a specific Network ID instead of all available.

ZeroTier shortnames will be used as hostnames so it is important that all members of a network only use DNS compatible characters in their shortname. This script will replace spaces in shortnames with a -. Non-compliant members can be renamed from the specific my.zerotier.com Network page. Members with empty shortnames will be named after their unique Member ID (10-digit alphanumeric value).

Usage:

getnetworkmembers --api=<32charalphanum> --output=<path/to/output/file>

OPTIONS:
    -a=,  --api=                        
            (32 digit alphanumeric key) Specifies the ZeroTier API Token (account) to query the API for netorks and members. 
            Default behavior is to query all the networks the Token owner are member off or networks shared with. This behavior can be changed 
            to only query a single specific Network ID with the --network argument.
 
    -u=,  --url=                        
            (HTTPS) OPTIONAL. URL to a standalone ZeroTier network controller API (Moon). 
            Default value is https://my.zerotier.com/api as this is the public network controller default configured in every ZeroTier client.
            This argument is only for those who run a standalone ZeroTier network controller.
     
    -n=, --network=
            (16 digit alphanumeric key) OPTIONAL. Default behavior is to query all available networks.
            If a Network ID is specifed only this network queried. 

    -d=, --tld=                          
            (string) OPTIONAL. Top Level Domain to append the networkname in the outputfile - e.g sdn, zero, net, etc...
            Using the output file for DNS resolving will result in the members having a FQDN of member-shortname.networkname.tld
            i.e specifying sdn will give the member fileserver in a network named home the FQDN of fileserver.home.sdn. 
            Default value is ZT resulting in a FQDN of member-shortname.networkname.zt
            NOTE: Do not use a leading . only letters - i.e ZT and not .ZT

    -o=, --output=
            (string, filepath) Path to outputfile e.g /etc/dnsmasq.zerotier.
            NOTE: The file will be overwritten at each run
            NOTE: Be sure to run ths script with sudo if you are writing to a file outside your oen HOMEDIR. 

    -s=, --silent=
            (TRUE | FALSE) OPTIONAL. Default value is FALSE and output status to to console. 
            NOTE: --silent can't be combined with --verbose. It's either or.

    -v=, --verbose=
            (TRUE | FALSE) OPTIONAL. Default value is FALSE and only output status to to console.
            This vill output the content of the outputfile to the console. 
            NOTE: --verbose can't be combined with --silent. It's either or.

PREREQUISITES:
    APPLICATIONS: curl , jq

or alternatively just edit the script variables in the section at line 86 to avoid the need for any runtime parameters.

• APIKEY is your API Access Token from the my.zerotier.com Account page.
• OUTPUT /path/to/dir/and/filename.zt
• TLD is the top-level domain that will be added to create a FQDN out of the networkname and shortname - i.e membwer-shortname.networkname.tld (server.office.zt).

TODO:

• Handle shortnames with space (change or remove it). fixed in 0.5: spaces will be replaced with a "-"
• Handle members with more than 1 assigned IP. fixed in 0.5
• Use the short name of a network as domain name (and handle spaces in name). fixed in 0.5: Configurable TLD variable as well
• Handle members across all networks. fixed in 0.6
• Support both use cases: getting only members of a single specified network or all members from all networks. fixed in 0.7
• Support support both silent and verbose console output. fixed in 0.7
• Some input validation of API token and Network ID args. fixed in 0.7
• Check if dependencies/tools are installed. fixed in 0.7
• Proper --help and usage output arguments. fixed in 0.7
• Handle auguments in a random order. fixed in 0.7
• Handle empty member shortnames to avoid a FQDN without a hostname .networkname.tld fixed in 0.8

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joinnetwork

This script will automatically join a new device (member) to a ZeroTier network. It can be used with cloud-init or during other deployment tools. The Network ID must be specified to join the network. If an API Token is also specified this will be used to autorize the member (i.e getting true access and assigned a ZT IP). The script can also just autorize an existing member that have joined but still haven't been autorized by a network admin.

Usage:

joinnetwork --network=<32charalphanum> --api=<32charalphanum> [ <other options: see below> ]

OPTIONS:
    -a=,  --api=                        
            (32 digit alphanumeric key) OPTIONAL. Specifies the ZeroTier API Token (account) to authorize the new device member (i.e allow traffic with other members and get an IP assigned).
            NOTE: If not specified the device will still be joined to the network, but not able to communitate with other devices until authorized by an admin or by running this script with the --api option. 

    -u=,  --url=                        
            (HTTPS) OPTIONAL. URL to a standalone ZeroTier network controller API (Moon). 
            Default value is https://my.zerotier.com/api as this is the public network controller default configured in every ZeroTier client.
            NOTE: This argument is only for those who run a standalone ZeroTier network controller.
     
    -n=, --network=
            (16 digit alphanumeric key) REQUIRED. The ZeroTier network (Network ID) to join.
            NOTE: A Network ID must be specified.  
    
    -m=,  --member=                        
            (STRING) OPTIONAL. RECOMENDED. Configures the device member shortname used by this client for the specific ZeroTier network. 
            Default action is use the unique device Node ID (10-digit alphanumeric) as member shortname. Use this option to set a more recognizable value.
            NOTE: Name must only be enclosed in quotes (" ") if any spaces are used. . Though spaces will for DNS compability be replaced with dashes (-).
                  This setting is a object value stored inside each ZeroTier network. As a client its therefore possible to use a diffrent short name inside each network.
                  Joining via the zerotier-cli utility will not configure any shortname and leave an empty value. This can cause problems if pulling data for DNS use.
 
   -d=,  --description=                        
            (STRING) OPTIONAL. RECOMENDED. Configures the device member description field for this client.
            NOTE: Discription must only be enclosed in quotes (" ") if any spaces are used. 
                  This setting is a object value stored inside each ZeroTier network. As a client its therefore possible to use a diffrent description field inside each network.
                  Joining via the zerotier-cli utility will not configure any description and leave an empty value.

PREREQUISITES:
    APPLICATIONS: zerotier-one , curl , jq

or alternatively just edit the script variables in the section at line 78 to avoid the need for any runtime parameters.

• NETWORK ID is the Network ID you wish to join and must be provided by an admin or existing member. Existing members can see the desired Network ID on the my.zerotier.com Network page or via the zeroctier-cli listnetworks command.
• APIKEY is your API Access Token from the my.zerotier.com Account page. When specified this token will be used to authorize the new member.

TODO:

• Handle existing members without authorization. fixed in 0.5
• Move auth part to a function fixed in 0.5
• Check if NETWORK ID and APIKEY have the corect lenght (basic syntac check) fixed in 0.6
• Check if dependencies are installed (curl, jq and zerotier-cli) fixed in 0.6
• Some input validation of API token and Network ID args fixed in 0.6
• Proper --help and usage output arguments fixed in 0.6
• Handle auguments in a random order fixed in 0.6
• Add option to set device member shortname (idea from RobertJensen) fixed in 0.7
• Move to a pure API driven approach and rely less on a local installed zerotier-one package

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