I have renamed "members" to "peers". Added IPFS daemon ID and addresses to the ID object and have Peers() return the collection of ID() objects from the cluster. License: MIT Signed-off-by: Hector Sanjuan <hector@protocol.ai>
6.8 KiB
ipfs-cluster
Clustering for IPFS nodes.
WORK IN PROGRESS
DO NOT USE IN PRODUCTION
ipfs-cluster
is a tool which groups a number of IPFS nodes together, allowing to collectively perform operations such as pinning.
In order to do so IPFS Cluster nodes use a libp2p-based consensus algorithm (currently Raft) to agree on a log of operations and build a consistent state across the cluster. The state represents which objects should be pinned by which nodes.
Additionally, cluster nodes act as a proxy/wrapper to the IPFS API, so they can be used as a regular node, with the difference that pin requests are handled by the Cluster.
IPFS Cluster provides a cluster-node application (ipfs-cluster-service
), a Go API, a HTTP API and a command-line tool (ipfs-cluster-ctl
).
Current functionality only allows pinning in all cluster peers, but more strategies (like setting a replication factor for each pin) will be developed.
Table of Contents
Background
Since the start of IPFS it was clear that a tool to coordinate a number of different nodes (and the content they are supposed to store) would add a great value to the IPFS ecosystem. Naïve approaches are possible, but they present some weaknesses, specially at dealing with error handling, recovery and implementation of advanced pinning strategies.
ipfs-cluster
aims to address this issues by providing a IPFS node wrapper which coordinates multiple cluster peers via a consensus algorithm. This ensures that the desired state of the system is always agreed upon and can be easily maintained by the cluster peers. Thus, every cluster node knows which content is tracked, can decide whether asking IPFS to pin it and can react to any contingencies like node reboots.
Captain
This project is captained by @hsanjuan. See the captain's log for information about current status and upcoming features. You can also check out the project's Roadmap.
Install
In order to install the ipfs-cluster-service
the ipfs-cluster-ctl
tool simply download this repository and run make
as follows:
$ go get -u -d github.com/ipfs/ipfs-cluster
$ cd $GOPATH/src/github.com/ipfs/ipfs-cluster
$ make install
This will install ipfs-cluster-service
and ipfs-cluster-ctl
in your $GOPATH/bin
folder.
Usage
ipfs-cluster-service
ipfs-cluster-service
runs a cluster peer. Usage information can be obtained running:
$ ipfs-cluster-service -h
Before running ipfs-cluster-service
for the first time, initialize a configuration file with:
$ ipfs-cluster-service -init
The configuration will be placed in ~/.ipfs-cluster/service.json
by default.
You can add the multiaddresses for the other cluster peers the cluster_peers
variable. For example, here is a valid configuration for a cluster of 4 peers:
{
"id": "QmSGCzHkz8gC9fNndMtaCZdf9RFtwtbTEEsGo4zkVfcykD",
"private_key" : "<redacted>",
"cluster_peers" : [
"/ip4/192.168.1.2/tcp/9096/ipfs/QmcQ5XvrSQ4DouNkQyQtEoLczbMr6D9bSenGy6WQUCQUBt",
"/ip4/192.168.1.3/tcp/9096/ipfs/QmdFBMf9HMDH3eCWrc1U11YCPenC3Uvy9mZQ2BedTyKTDf",
"/ip4/192.168.1.4/tcp/9096/ipfs/QmYY1ggjoew5eFrvkenTR3F4uWqtkBkmgfJk8g9Qqcwy51",
"/ip4/192.168.1.5/tcp/9096/ipfs/QmSGCzHkz8gC9fNndMtaCZdf9RFtwtbTEEsGo4zkVfcykD"
],
"cluster_multiaddress": "/ip4/0.0.0.0/tcp/9096",
"api_listen_multiaddress": "/ip4/127.0.0.1/tcp/9094",
"ipfs_proxy_listen_multiaddress": "/ip4/127.0.0.1/tcp/9095",
"ipfs_node_multiaddress": "/ip4/127.0.0.1/tcp/5001",
"consensus_data_folder": "/home/user/.ipfs-cluster/data",
"raft_config": {
"snapshot_interval_seconds": 120,
"enable_single_node": true
}
The configuration file should probably be identical among all cluster peers, except for the id
and private_key
fields. To facilitate configuration, cluster_peers
may include its own address, but it does not have to. For additional information about the configuration format, see the JSONConfig documentation.
Once every cluster peer has the configuration in place, you can run ipfs-cluster-service
to start the cluster.
ipfs-cluster-ctl
ipfs-cluster-ctl
is the client application to manage the cluster nodes and perform actions. ipfs-cluster-ctl
uses the HTTP API provided by the nodes.
After installing, you can run ipfs-cluster-ctl --help
to display general description and options, or alternatively ipfs-cluster-ctl help [cmd]
to display
information about supported commands.
In summary, it works as follows:
$ ipfs-cluster-ctl peers ls # list cluster peers
$ ipfs-cluster-ctl pin add Qma4Lid2T1F68E3Xa3CpE6vVJDLwxXLD8RfiB9g1Tmqp58 # pins a Cid in the cluster
$ ipfs-cluster-ctl pin rm Qma4Lid2T1F68E3Xa3CpE6vVJDLwxXLD8RfiB9g1Tmqp58 # unpins a Cid from the cluster
$ ipfs-cluster-ctl status # display tracked Cids information
$ ipfs-cluster-ctl sync Qma4Lid2T1F68E3Xa3CpE6vVJDLwxXLD8RfiB9g1Tmqp58 # recover Cids in error status
Go
IPFS Cluster nodes can be launched directly from Go. The Cluster
object provides methods to interact with the cluster and perform actions.
Documentation and examples on how to use IPFS Cluster from Go can be found in godoc.org/github.com/ipfs/ipfs-cluster.
API
TODO: Swagger
Contribute
PRs accepted.
Small note: If editing the README, please conform to the standard-readme specification.
License
MIT © Protocol Labs, Inc.