This takes advantange of the latest features in go-cid, peer.ID and
go-multiaddr and makes the Go types serializable by default.
This means we no longer need to copy between Pin <-> PinSerial, or ID <->
IDSerial etc. We can now efficiently binary-encode these types using short
field keys and without parsing/stringifying (in many cases it just a cast).
We still get the same json output as before (with minor modifications for
Cids).
This should greatly improve Cluster performance and memory usage when dealing
with large collections of items.
License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>
Squashed commit of the following:
commit 38cf569c6aed77c46ee4e0f8baa4d1a9daf8f03e
Merge: d125f69 aaada42
Author: Hector Sanjuan <hsanjuan@users.noreply.github.com>
Date: Wed Feb 20 11:02:00 2019 +0000
Merge pull request #634 from ipfs/issue_450
Support PinPath, UnpinPath (resolve before pinning)
commit aaada42054e1f1c7b2abb1270859d0de41a0e5d8
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Tue Feb 19 22:16:25 2019 +0530
formatResponse accepts api.Pin and not api.PinSerial
commit b5da4bea045865814cc422da71827b44ddd44b90
Merge: ba59036 cc8dd7e
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Tue Feb 19 21:36:46 2019 +0530
Merge branch 'master' into issue_450
commit ba5903649c1df1dba20f4d6f7e3573d6fe24921f
Merge: f002914 d59880c
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Mon Feb 18 08:41:11 2019 +0530
Merge branch 'issue_450' of github.com:ipfs/ipfs-cluster into issue_450
commit f00291494c0c02621c2296cbb7ac71e4c23aa9ec
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Mon Feb 18 08:31:39 2019 +0530
PinPath: more improvements
Added tracing for new methods
commit d59880c338eaa8214fe06b4f930a540793d78407
Merge: 0ca4c7c b4f0eb3
Author: Hector Sanjuan <hsanjuan@users.noreply.github.com>
Date: Wed Feb 13 15:22:49 2019 +0000
Merge branch 'master' into issue_450
commit 0ca4c7c3b0670ed9c8279f8274d36e3485c10030
Merge: d35017a ecef9ea
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Tue Feb 12 13:10:13 2019 +0530
Merge branch 'master' into issue_450
commit d35017a8de91ca9fc9a9a047c48c75134cee9f98
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Tue Feb 12 13:07:25 2019 +0530
PinPath: more improvements
- Worth having `PinOptions` as a separate field in the struct and
constructing the query in the test with ToQuery()
- sharness: "intialization" line can be placed outside the tests at
the top
commit 68e3b90417ffbad89d41a70ac81d85f9037f8848
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Sun Feb 10 21:43:50 2019 +0530
Using if-continue pattern instead of if-else
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 3c29799f3b85be328b27508332ab92049d8b82f3
Merge: 956790b 4324889
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Thu Feb 7 10:25:52 2019 +0530
Merge branch 'master' into issue_450
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 956790b381db9858e4194f983e898b07dc51ba66
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Wed Feb 6 21:11:20 2019 +0530
Removing resolved path
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 7191cc46cedfbec116a9746937e28881b50ca044
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Wed Feb 6 16:45:07 2019 +0530
Fix go vet
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit f8b3d5b63b1b7569e2a3e0d82894fd4491c246c4
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Wed Feb 6 16:07:03 2019 +0530
Fixed linting error
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 23c57eb467755a1f21387a1615a7f34e97348053
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Wed Feb 6 09:20:41 2019 +0530
Fixed tests
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 0caedd94aefeb3b6649dedc214cb4b849ace2ea4
Merge: 17e555e 5a7ee1d
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Wed Feb 6 00:07:10 2019 +0530
Merge branch 'master' into issue_450
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 17e555e4a7c574413df90aac70c5cc29cab98f54
Author: Hector Sanjuan <code@hector.link>
Date: Tue Feb 5 16:58:50 2019 +0000
PinPath: address some feedback + improvements
* Changed client's Pin() API and PinPath to be consistent
* Added helper methods to turn PinPath to query and back
* Make code and tests build
* Use TestCidResolved everywhere
* Fix cluster.PinPath arguments
* Fix formatting of responses with --no-status
* Make tests readable and call Fatal when needed
* Use a pathTestCases variable
commit f0e7369c47c5ddadc8ed45df5fd2d4d9b2d42b38
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Tue Feb 5 18:34:26 2019 +0530
Support PinPath, UnpinPath(resolve before pinning)
Addressed review comments as in
https://github.com/ipfs/ipfs-cluster/pull/634#pullrequestreview-198751932
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit a8b4f181d2d7afed32ee41331dfaab19fd66a173
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Tue Jan 29 22:41:27 2019 +0530
Fixing tests
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit e39b95ca19e4d75506f4f492678245ef13936a44
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Tue Jan 29 14:52:53 2019 +0530
Support PinPath, UnpinPath(resolve before pinning)
- PinPath and UnpinPath should return api.Pin
- PinPath should accept pin options
- Removing duplicate logic for Resolve from cluster
- And many other review comments https://github.com/ipfs/ipfs-cluster/pull/634#pullrequestreview-195509504
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit d146075126320896665ba58d337a13789f68ea86
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Wed Jan 23 17:08:41 2019 +0530
Support PinPath, UnpinPath(resolve before pinning)
PinPath(in both rest and rpc) should return a serializable struct in the
form `{"\":"Q...cid..string..."}` (as used in "github.com/ipfs/go-cid"
to marshal and unmarshal)
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 1f4869568a8adb450275257154ea3a26d03a30f3
Merge: 7acfd28 a244af9
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Wed Jan 23 07:18:56 2019 +0530
Merge branch 'master' into issue_450
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 7acfd282732ddf2282a67d4f9d0170a494eb3ed4
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Tue Jan 22 18:14:32 2019 +0530
Support PinPath, UnpinPath(resolve before pinning)
- RPC must always use serializable structs
- In command, just use pin with path as cid is also a valid path
- Addressing many other small review comments as in
https://github.com/ipfs/ipfs-cluster/pull/634#pullrequestreview-192122534
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 36905041e1e3f0b204942030aab3ab7b5b9e4d62
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Wed Jan 16 09:36:42 2019 +0530
Support PinPath, UnpinPath(resolve before pinning)
Extra logic for path checking should go into resolve so that it can be
properly reused
Added sharness tests
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 9116bda3534e77bb391d873051bb520a1b01a326
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Wed Jan 16 08:08:07 2019 +0530
Support PinPath, UnpinPath(resolve before pinning)
error strings should not be capitalized
Fixes#450
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit ca7e61861374f456300a85ddc0374e594f74f963
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Tue Jan 15 23:40:25 2019 +0530
Support PinPath, UnpinPath(resolve before pinning)
Tests
Fixes#450
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 522fbcd899f01c01680375561a32a87464157c0a
Merge: f1a56ab f7bc468
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Tue Jan 15 10:40:54 2019 +0530
Merge branch 'master' into issue_450
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit f1a56ab925fb74c0c44273a4524afa4843cf757f
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Mon Jan 14 20:58:17 2019 +0530
Support PinPath, UnpinPath(resolve before pinning)
- IPFS Connector should act as a pure IPFS client, any extra logic
should go to cluster.go
- Use cid.Undef, instead of cid.Cid{}
Fixes#450
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit c83b91054f6774f1f9d4930cfc3f1fa28236f57c
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Thu Jan 10 08:57:17 2019 +0530
Support PinPath, UnpinPath(resolve before pinning)
- Separate handlers, methods and rpc apis for PinPath and UnpinPath from
Pin and Unpin
- Support ipld paths as well
Fixes#450
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 719dff88129366ce3ccb5e04cb6f8082a0915c5c
Merge: 91ceb47 21170c4
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Wed Jan 9 19:38:35 2019 +0530
Merge branch 'issue_450_old' into HEAD
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 91ceb4796259ca7ef2974ec43e6a278a12796b13
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Wed Jan 9 19:36:41 2019 +0530
Revert "WIP: Figure out why test does not impleme"
This reverts commit 28a3a3f25dce6f296c8cbef86221644c099a7e75.
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
commit 28a3a3f25dce6f296c8cbef86221644c099a7e75
Author: cd10012 <ced361@nyu.edu>
Date: Tue Jul 24 23:23:10 2018 -0400
WIP: Figure out why test does not implement IPFSConnector interface...
License: MIT
Signed-off-by: cd10012 <ced361@nyu.edu>
commit 21170c48e77e69583db64544b08120a9baf40d8d
Author: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Date: Tue Jan 8 10:37:59 2019 +0530
Support PinPath, UnpinPath (resolve before pinning)
This commit adds API support for pinning using path
`POST /pins/<ipfs or ipns path>` and `DELETE /pins/<ipfs or ipns path>`
will resolve the path into a cid and perform perform pinning or
unpinning
Fixes#450
License: MIT
Signed-off-by: Kishan Mohanbhai Sagathiya <kishansagathiya@gmail.com>
Co-authored-by: Hector Sanjuan <hector@protocol.ai>
License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>
This commit adds support for OpenCensus tracing
and metrics collection. This required support for
context.Context propogation throughout the cluster
codebase, and in particular, the ipfscluster component
interfaces.
The tracing propogates across RPC and HTTP boundaries.
The current default tracing backend is Jaeger.
The metrics currently exports the metrics exposed by
the opencensus http plugin as well as the pprof metrics
to a prometheus endpoint for scraping.
The current default metrics backend is Prometheus.
Metrics are currently exposed by default due to low
overhead, can be turned off if desired, whereas tracing
is off by default as it has a much higher performance
overhead, though the extent of the performance hit can be
adjusted with smaller sampling rates.
License: MIT
Signed-off-by: Adrian Lanzafame <adrianlanzafame92@gmail.com>
This patch modifies the RPC protocol tag to use Major and Minor parts of the
version and not all of it.
This means all peers on the 0.5.x can run in the same cluster.
As cluster has become more mature and I see less risks in letting peers from
similar versions run together. This is useful when upgrading too.
License: MIT
Signed-off-by: Hector Sanjuan <code@hector.link>
tests cover local and sharded adds of files
ipfs mock and ipfs block put/get calls cleaned up
License: MIT
Signed-off-by: Wyatt Daviau <wdaviau@cs.stanford.edu>
non-recursive cdag pins
priority pins for shards to allocated peer
cdag, meta and shard pin types used
License: MIT
Signed-off-by: Wyatt Daviau <wdaviau@cs.stanford.edu>
4 PinTypes specify how CID is pinned
Changes to Pin and Unpin to handle different PinTypes
Tests for different PinTypes
Migration for new state format using new Pin datastructures
Visibility of the PinTypes used internally limited by default
License: MIT
Signed-off-by: Wyatt Daviau <wdaviau@cs.stanford.edu>
A sharder config provides a default shard size
getAllocations calls newly exposed rpcs
ipld cbor cluster dag node construction
logic to handle Flushing final shard
logic to initialize and finalize shard sessions
License: MIT
Signed-off-by: Wyatt Daviau <wdaviau@cs.stanford.edu>
Write basic scaffolding to include a sharding component in cluster
Sketch out a high level implementation in pseudo code
Share thoughts on upcoming design challenges
License: MIT
Signed-off-by: Wyatt Daviau <wdaviau@cs.stanford.edu>
RPC call to put a block in ipfs
IPFSConnector method to implement the RPC call
cluster restapi reads from channel and puts
blocks into IPFS via RPC in ctl add handler
License: MIT
Signed-off-by: Wyatt Daviau <wdaviau@cs.stanford.edu>
The monitor component should be in charge of deciding how it is
best to send metrics to other peers and what that means.
This adds the PublishMetric() method to the component interface
and moves that functionality from Cluster main component to the
basic monitor.
There is a behaviour change. Before, the metrics where sent only to
the leader, while the leader was the only peer to broadcast them everywhere.
Now, all peers broadcast all metrics everywhere. This is mostly
because we should not rely on the consensus layer providing a Leader(), so
we are taking the chance to remove this dependency.
Note that in any-case, pubsub monitoring should replace the
existing basic monitor. This is just paving the ground.
Additionally, in order to not duplicate the multiRPC code
in the monitor, I have moved that functionality to go-libp2p-gorpc
and added an rpcutil library to cluster which includes useful
methods to perform multiRPC requests (some of them existed in
util.go, others are new and help handling multiple contexts etc).
License: MIT
Signed-off-by: Hector Sanjuan <code@hector.link>
This commit promotes the Consensus component (and Raft) to become a fully
independent thing like other components, passed to NewCluster during
initialization. Cluster (main component) no longer creates the consensus
layer internally. This has triggered a number of breaking changes
that I will explain below.
Motivation: Future work will require the possibility of running Cluster
with a consensus layer that is not Raft. The "consensus" layer is in charge
of maintaining two things:
* The current cluster peerset, as required by the implementation
* The current cluster pinset (shared state)
While the pinset maintenance has always been in the consensus layer, the
peerset maintenance was handled by the main component (starting by the "peers"
key in the configuration) AND the Raft component (internally)
and this generated lots of confusion: if the user edited the peers in the
configuration they would be greeted with an error.
The bootstrap process (adding a peer to an existing cluster) and configuration
key also complicated many things, since the main component did it, but only
when the consensus was initialized and in single peer mode.
In all this we also mixed the peerstore (list of peer addresses in the libp2p
host) with the peerset, when they need not to be linked.
By initializing the consensus layer before calling NewCluster, all the
difficulties in maintaining the current implementation in the same way
have come to light. Thus, the following changes have been introduced:
* Remove "peers" and "bootstrap" keys from the configuration: we no longer
edit or save the configuration files. This was a very bad practice, requiring
write permissions by the process to the file containing the private key and
additionally made things like Puppet deployments of cluster difficult as
configuration would mutate from its initial version. Needless to say all the
maintenance associated to making sure peers and bootstrap had correct values
when peers are bootstrapped or removed. A loud and detailed error message has
been added when staring cluster with an old config, along with instructions on
how to move forward.
* Introduce a PeerstoreFile ("peerstore") which stores peer addresses: in
ipfs, the peerstore is not persisted because it can be re-built from the
network bootstrappers and the DHT. Cluster should probably also allow
discoverability of peers addresses (when not bootstrapping, as in that case
we have it), but in the meantime, we will read and persist the peerstore
addresses for cluster peers in this file, different from the configuration.
Note that dns multiaddresses are now fully supported and no IPs are saved
when we have DNS multiaddresses for a peer.
* The former "peer_manager" code is now a pstoremgr module, providing utilities
to parse, add, list and generally maintain the libp2p host peerstore, including
operations on the PeerstoreFile. This "pstoremgr" can now also be extended to
perform address autodiscovery and other things indepedently from Cluster.
* Create and initialize Raft outside of the main Cluster component: since we
can now launch Raft independently from Cluster, we have more degrees of
freedom. A new "staging" option when creating the object allows a raft peer to
be launched in Staging mode, waiting to be added to a running consensus, and
thus, not electing itself as leader or doing anything like we were doing
before. This additionally allows us to track when the peer has become a
Voter, which only happens when it's caught up with the state, something that
was wonky previously.
* The raft configuration now includes an InitPeerset key, which allows to
provide a peerset for new peers and which is ignored when staging==true. The
whole Raft initialization code is way cleaner and stronger now.
* Cluster peer bootsrapping is now an ipfs-cluster-service feature. The
--bootstrap flag works as before (additionally allowing comma-separated-list
of entries). What bootstrap does, is to initialize Raft with staging == true,
and then call Join in the main cluster component. Only when the Raft peer
transitions to Voter, consensus becomes ready, and cluster becomes Ready.
This is cleaner, works better and is less complex than before (supporting
both flags and config values). We also backup and clean the state whenever
we are boostrapping, automatically
* ipfs-cluster-service no longer runs the daemon. Starting cluster needs
now "ipfs-cluster-service daemon". The daemon specific flags (bootstrap,
alloc) are now flags for the daemon subcommand. Here we mimic ipfs ("ipfs"
does not start the daemon but print help) and pave the path for merging both
service and ctl in the future.
While this brings some breaking changes, it significantly reduces the
complexity of the configuration, the code and most importantly, the
documentation. It should be easier now to explain the user what is the
right way to launch a cluster peer, and more difficult to make mistakes.
As a side effect, the PR also:
* Fixes#381 - peers with dynamic addresses
* Fixes#371 - peers should be Raft configuration option
* Fixes#378 - waitForUpdates may return before state fully synced
* Fixes#235 - config option shadowing (no cfg saves, no need to shadow)
License: MIT
Signed-off-by: Hector Sanjuan <code@hector.link>
to the ipfscluster.IPFSConnector interface and then
to the implementation of that interface in ipfsconn/ipfshttp.
This allows calls from MapPinTracker to cancel requests made
to the local IPFS node.
License: MIT
Signed-off-by: Adrian Lanzafame <adrianlanzafame92@gmail.com>
added ConnectGraph type and serialization
added cli command hitting cluster api
added cluster api client method + endpoint calling into rpc
added rpc calling into main cluster component
added clustercomponent's function to collect ConnectGraph
added functionality in ipfsconn to retrieve ipfs swarm peers
added dot file printing given ConnectGraphSerial
License: MIT
Signed-off-by: Wyatt Daviau <wdaviau@cs.stanford.edu>
This adds API, RPC calls to support RecoverAllLocal() (and expose RecoverLocal()
on the Rest API too). cluster-ctl is updated accordingly.
License: MIT
Signed-off-by: Hector Sanjuan <code@hector.link>
This change removes the duplicities of the PeerManager component:
* No more commiting PeerAdd and PeerRm log entries
* The Raft peer set is the source of truth
* Basic broadcasting is used to communicate peer multiaddresses
in the cluster
* A peer can only be added in a healthy cluster
* A peer can be removed from any cluster which can still commit
* This also adds support for multiple multiaddresses per peer
License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>
The disk informer uses "ipfs repo stat" to fetch the RepoSize value and
uses it as a metric.
The numpinalloc allocator is now a generalized ascendalloc which
sorts metrics in ascending order and return the ones with lowest
values.
License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>
This adds snapshot and restore methods to state and uses the snapshot
one to save a copy of the state when shutting down. Right now, this is
not used for anything else.
Some lines performing a migration, but this is only an idea of how it could
work.
License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>
CidArg used to be an internal name for an argument that carried a Cid.
Now it has surfaced to API level and makes no sense. It is a Pin. It
represents a Pin (Cid, Allocations, Replication Factor)
License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>
New PeerManager, Allocator, Informer components have been added along
with a new "replication_factor" configuration option.
First, cluster peers collect and push metrics (Informer) to the Cluster
leader regularly. The Informer is an interface that can be implemented
in custom wayts to support custom metrics.
Second, on a pin operation, using the information from the collected metrics,
an Allocator can provide a list of preferences as to where the new pin
should be assigned. The Allocator is an interface allowing to provide
different allocation strategies.
Both Allocator and Informer are Cluster Componenets, and have access
to the RPC API.
The allocations are kept in the shared state. Cluster peer failure
detection is still missing and re-allocation is still missing, although
re-pinning something when a node is down/metrics missing does re-allocate
the pin somewhere else.
License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>
At the beginning we opted for native types which were
serializable (PinInfo had a CidStr field instead of Cid).
Now we provide types in two versions: native and serializable.
Go methods use native. The rest of APIs (REST/RPC) use always
serializable versions. Methods are provided to convert between the
two.
The reason for moving these out of the way is to be able to re-use
type definitions when parsing API responses in `ipfs-cluster-ctl` or
any other clients that come up. API responses are just the serializable
version of types in JSON encoding. This also reduces having
duplicate types defs and parsing methods everywhere.
License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>
This is the third implementation attempt. This time, rather than
broadcasting PeerAdd/Join requests to the whole cluster, we use the
consensus log to broadcast new peers joining.
This makes it easier to recover from errors and to know who exactly
is member of a cluster and who is not. The consensus is, after all,
meant to agree on things, and the list of cluster peers is something
everyone has to agree on.
Raft itself uses a special log operation to maintain the peer set.
The tests are almost unchanged from the previous attempts so it should
be the same, except it doesn't seem possible to bootstrap a bunch of nodes
at the same time using different bootstrap nodes. It works when using
the same. I'm not sure this worked before either, but the code is
simpler than recursively contacting peers, and scales better for
larger clusters.
Nodes have to be careful about joining clusters while keeping the state
from a different cluster (disjoint logs). This may cause problems with
Raft.
License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>
This commit adds PeerAdd() and PeerRemove() endpoints, CLI support,
tests. Peer management is a delicate issue because of how the consensus
works underneath and the places that need to track such peers.
When adding a peer the procedure is as follows:
* Try to open a connection to the new peer and abort if not reachable
* Broadcast a PeerManagerAddPeer operation which tells all cluster members
to add the new Peer. The Raft leader will add it to Raft's peerset and
the multiaddress will be saved in the ClusterPeers configuration key.
* If the above fails because some cluster node is not responding,
broadcast a PeerRemove() and try to undo any damage.
* If the broadcast succeeds, send our ClusterPeers to the new Peer along with
the local multiaddress we are using in the connection opened in the
first step (that is the multiaddress through which the other peer can reach us)
* The new peer updates its configuration with the new list and joins
the consensus
License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>
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>
