9b9d76f92d
This commit introduces the new go-libp2p-gorpc streaming capabilities for Cluster. The main aim is to work towards heavily reducing memory usage when working with very large pinsets. As a side-effect, it takes the chance to revampt all types for all public methods so that pointers to static what should be static objects are not used anymore. This should heavily reduce heap allocations and GC activity. The main change is that state.List now returns a channel from which to read the pins, rather than pins being all loaded into a huge slice. Things reading pins have been all updated to iterate on the channel rather than on the slice. The full pinset is no longer fully loaded onto memory for things that run regularly like StateSync(). Additionally, the /allocations endpoint of the rest API no longer returns an array of pins, but rather streams json-encoded pin objects directly. This change has extended to the restapi client (which puts pins into a channel as they arrive) and to ipfs-cluster-ctl. There are still pending improvements like StatusAll() calls which should also stream responses, and specially BlockPut calls which should stream blocks directly into IPFS on a single call. These are coming up in future commits.
668 lines
17 KiB
Go
668 lines
17 KiB
Go
package client
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import (
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"bytes"
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"net/url"
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"os"
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"path"
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"path/filepath"
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"strings"
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"time"
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"github.com/ipfs/ipfs-cluster/api"
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cid "github.com/ipfs/go-cid"
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files "github.com/ipfs/go-ipfs-files"
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gopath "github.com/ipfs/go-path"
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peer "github.com/libp2p/go-libp2p-core/peer"
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"go.opencensus.io/trace"
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)
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// ID returns information about the cluster Peer.
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func (c *defaultClient) ID(ctx context.Context) (api.ID, error) {
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ctx, span := trace.StartSpan(ctx, "client/ID")
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defer span.End()
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var id api.ID
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err := c.do(ctx, "GET", "/id", nil, nil, &id)
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return id, err
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}
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// Peers requests ID information for all cluster peers.
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func (c *defaultClient) Peers(ctx context.Context) ([]api.ID, error) {
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ctx, span := trace.StartSpan(ctx, "client/Peers")
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defer span.End()
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var ids []api.ID
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err := c.do(ctx, "GET", "/peers", nil, nil, &ids)
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return ids, err
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}
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type peerAddBody struct {
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PeerID string `json:"peer_id"`
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}
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// PeerAdd adds a new peer to the cluster.
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func (c *defaultClient) PeerAdd(ctx context.Context, pid peer.ID) (api.ID, error) {
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ctx, span := trace.StartSpan(ctx, "client/PeerAdd")
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defer span.End()
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pidStr := peer.Encode(pid)
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body := peerAddBody{pidStr}
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var buf bytes.Buffer
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enc := json.NewEncoder(&buf)
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enc.Encode(body)
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var id api.ID
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err := c.do(ctx, "POST", "/peers", nil, &buf, &id)
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return id, err
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}
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// PeerRm removes a current peer from the cluster
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func (c *defaultClient) PeerRm(ctx context.Context, id peer.ID) error {
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ctx, span := trace.StartSpan(ctx, "client/PeerRm")
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defer span.End()
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return c.do(ctx, "DELETE", fmt.Sprintf("/peers/%s", id.Pretty()), nil, nil, nil)
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}
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// Pin tracks a Cid with the given replication factor and a name for
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// human-friendliness.
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func (c *defaultClient) Pin(ctx context.Context, ci cid.Cid, opts api.PinOptions) (api.Pin, error) {
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ctx, span := trace.StartSpan(ctx, "client/Pin")
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defer span.End()
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query, err := opts.ToQuery()
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if err != nil {
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return api.Pin{}, err
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}
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var pin api.Pin
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err = c.do(
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ctx,
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"POST",
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fmt.Sprintf(
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"/pins/%s?%s",
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ci.String(),
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query,
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),
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nil,
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nil,
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&pin,
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)
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return pin, err
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}
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// Unpin untracks a Cid from cluster.
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func (c *defaultClient) Unpin(ctx context.Context, ci cid.Cid) (api.Pin, error) {
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ctx, span := trace.StartSpan(ctx, "client/Unpin")
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defer span.End()
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var pin api.Pin
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err := c.do(ctx, "DELETE", fmt.Sprintf("/pins/%s", ci.String()), nil, nil, &pin)
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return pin, err
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}
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// PinPath allows to pin an element by the given IPFS path.
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func (c *defaultClient) PinPath(ctx context.Context, path string, opts api.PinOptions) (api.Pin, error) {
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ctx, span := trace.StartSpan(ctx, "client/PinPath")
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defer span.End()
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var pin api.Pin
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ipfspath, err := gopath.ParsePath(path)
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if err != nil {
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return api.Pin{}, err
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}
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query, err := opts.ToQuery()
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if err != nil {
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return api.Pin{}, err
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}
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err = c.do(
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ctx,
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"POST",
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fmt.Sprintf(
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"/pins%s?%s",
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ipfspath.String(),
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query,
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),
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nil,
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nil,
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&pin,
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)
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return pin, err
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}
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// UnpinPath allows to unpin an item by providing its IPFS path.
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// It returns the unpinned api.Pin information of the resolved Cid.
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func (c *defaultClient) UnpinPath(ctx context.Context, p string) (api.Pin, error) {
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ctx, span := trace.StartSpan(ctx, "client/UnpinPath")
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defer span.End()
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var pin api.Pin
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ipfspath, err := gopath.ParsePath(p)
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if err != nil {
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return api.Pin{}, err
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}
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err = c.do(ctx, "DELETE", fmt.Sprintf("/pins%s", ipfspath.String()), nil, nil, &pin)
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return pin, err
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}
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// Allocations returns the consensus state listing all tracked items and
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// the peers that should be pinning them.
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func (c *defaultClient) Allocations(ctx context.Context, filter api.PinType, out chan<- api.Pin) error {
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ctx, span := trace.StartSpan(ctx, "client/Allocations")
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defer span.End()
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defer close(out)
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types := []api.PinType{
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api.DataType,
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api.MetaType,
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api.ClusterDAGType,
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api.ShardType,
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}
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var strFilter []string
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if filter == api.AllType {
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strFilter = []string{"all"}
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} else {
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for _, t := range types {
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if t&filter > 0 { // the filter includes this type
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strFilter = append(strFilter, t.String())
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}
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}
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}
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handler := func(dec *json.Decoder) error {
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var obj api.Pin
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err := dec.Decode(&obj)
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if err != nil {
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return err
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}
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out <- obj
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return nil
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}
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f := url.QueryEscape(strings.Join(strFilter, ","))
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err := c.doStream(
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ctx,
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"GET",
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fmt.Sprintf("/allocations?filter=%s", f),
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nil,
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nil,
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handler)
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return err
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}
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// Allocation returns the current allocations for a given Cid.
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func (c *defaultClient) Allocation(ctx context.Context, ci cid.Cid) (api.Pin, error) {
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ctx, span := trace.StartSpan(ctx, "client/Allocation")
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defer span.End()
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var pin api.Pin
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err := c.do(ctx, "GET", fmt.Sprintf("/allocations/%s", ci.String()), nil, nil, &pin)
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return pin, err
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}
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// Status returns the current ipfs state for a given Cid. If local is true,
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// the information affects only the current peer, otherwise the information
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// is fetched from all cluster peers.
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func (c *defaultClient) Status(ctx context.Context, ci cid.Cid, local bool) (api.GlobalPinInfo, error) {
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ctx, span := trace.StartSpan(ctx, "client/Status")
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defer span.End()
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var gpi api.GlobalPinInfo
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err := c.do(
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ctx,
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"GET",
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fmt.Sprintf("/pins/%s?local=%t", ci.String(), local),
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nil,
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nil,
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&gpi,
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)
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return gpi, err
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}
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// StatusCids returns Status() information for the given Cids. If local is
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// true, the information affects only the current peer, otherwise the
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// information is fetched from all cluster peers.
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func (c *defaultClient) StatusCids(ctx context.Context, cids []cid.Cid, local bool) ([]api.GlobalPinInfo, error) {
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return c.statusAllWithCids(ctx, api.TrackerStatusUndefined, cids, local)
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}
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// StatusAll gathers Status() for all tracked items. If a filter is
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// provided, only entries matching the given filter statuses
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// will be returned. A filter can be built by merging TrackerStatuses with
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// a bitwise OR operation (st1 | st2 | ...). A "0" filter value (or
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// api.TrackerStatusUndefined), means all.
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func (c *defaultClient) StatusAll(ctx context.Context, filter api.TrackerStatus, local bool) ([]api.GlobalPinInfo, error) {
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return c.statusAllWithCids(ctx, filter, nil, local)
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}
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func (c *defaultClient) statusAllWithCids(ctx context.Context, filter api.TrackerStatus, cids []cid.Cid, local bool) ([]api.GlobalPinInfo, error) {
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ctx, span := trace.StartSpan(ctx, "client/StatusAll")
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defer span.End()
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var gpis []api.GlobalPinInfo
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filterStr := ""
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if filter != api.TrackerStatusUndefined { // undefined filter means "all"
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filterStr = filter.String()
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if filterStr == "" {
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return nil, errors.New("invalid filter value")
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}
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}
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cidsStr := make([]string, len(cids))
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for i, c := range cids {
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cidsStr[i] = c.String()
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}
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err := c.do(
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ctx,
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"GET",
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fmt.Sprintf("/pins?local=%t&filter=%s&cids=%s",
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local, url.QueryEscape(filterStr), strings.Join(cidsStr, ",")),
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nil,
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nil,
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&gpis,
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)
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return gpis, err
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}
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// Recover retriggers pin or unpin ipfs operations for a Cid in error state.
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// If local is true, the operation is limited to the current peer, otherwise
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// it happens on every cluster peer.
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func (c *defaultClient) Recover(ctx context.Context, ci cid.Cid, local bool) (api.GlobalPinInfo, error) {
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ctx, span := trace.StartSpan(ctx, "client/Recover")
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defer span.End()
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var gpi api.GlobalPinInfo
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err := c.do(ctx, "POST", fmt.Sprintf("/pins/%s/recover?local=%t", ci.String(), local), nil, nil, &gpi)
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return gpi, err
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}
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// RecoverAll triggers Recover() operations on all tracked items. If local is
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// true, the operation is limited to the current peer. Otherwise, it happens
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// everywhere.
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func (c *defaultClient) RecoverAll(ctx context.Context, local bool) ([]api.GlobalPinInfo, error) {
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ctx, span := trace.StartSpan(ctx, "client/RecoverAll")
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defer span.End()
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var gpis []api.GlobalPinInfo
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err := c.do(ctx, "POST", fmt.Sprintf("/pins/recover?local=%t", local), nil, nil, &gpis)
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return gpis, err
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}
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// Alerts returns information health events in the cluster (expired metrics
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// etc.).
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func (c *defaultClient) Alerts(ctx context.Context) ([]api.Alert, error) {
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ctx, span := trace.StartSpan(ctx, "client/Alert")
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defer span.End()
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var alerts []api.Alert
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err := c.do(ctx, "GET", "/health/alerts", nil, nil, &alerts)
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return alerts, err
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}
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// Version returns the ipfs-cluster peer's version.
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func (c *defaultClient) Version(ctx context.Context) (api.Version, error) {
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ctx, span := trace.StartSpan(ctx, "client/Version")
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defer span.End()
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var ver api.Version
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err := c.do(ctx, "GET", "/version", nil, nil, &ver)
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return ver, err
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}
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// GetConnectGraph returns an ipfs-cluster connection graph.
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// The serialized version, strings instead of pids, is returned
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func (c *defaultClient) GetConnectGraph(ctx context.Context) (api.ConnectGraph, error) {
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ctx, span := trace.StartSpan(ctx, "client/GetConnectGraph")
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defer span.End()
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var graph api.ConnectGraph
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err := c.do(ctx, "GET", "/health/graph", nil, nil, &graph)
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return graph, err
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}
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// Metrics returns a map with the latest valid metrics of the given name
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// for the current cluster peers.
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func (c *defaultClient) Metrics(ctx context.Context, name string) ([]api.Metric, error) {
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ctx, span := trace.StartSpan(ctx, "client/Metrics")
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defer span.End()
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if name == "" {
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return nil, errors.New("bad metric name")
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}
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var metrics []api.Metric
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err := c.do(ctx, "GET", fmt.Sprintf("/monitor/metrics/%s", name), nil, nil, &metrics)
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return metrics, err
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}
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// MetricNames lists names of all metrics.
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func (c *defaultClient) MetricNames(ctx context.Context) ([]string, error) {
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ctx, span := trace.StartSpan(ctx, "client/MetricNames")
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defer span.End()
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var metricsNames []string
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err := c.do(ctx, "GET", "/monitor/metrics", nil, nil, &metricsNames)
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return metricsNames, err
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}
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// RepoGC runs garbage collection on IPFS daemons of cluster peers and
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// returns collected CIDs. If local is true, it would garbage collect
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// only on contacted peer, otherwise on all peers' IPFS daemons.
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func (c *defaultClient) RepoGC(ctx context.Context, local bool) (api.GlobalRepoGC, error) {
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ctx, span := trace.StartSpan(ctx, "client/RepoGC")
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defer span.End()
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var repoGC api.GlobalRepoGC
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err := c.do(
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ctx,
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"POST",
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fmt.Sprintf("/ipfs/gc?local=%t", local),
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nil,
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nil,
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&repoGC,
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)
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return repoGC, err
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}
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// WaitFor is a utility function that allows for a caller to wait until a CID
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// status target is reached (as given in StatusFilterParams).
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// It returns the final status for that CID and an error, if there was one.
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//
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// WaitFor works by calling Status() repeatedly and checking that returned
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// peers have transitioned to the target TrackerStatus. It immediately returns
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// an error when the an error is among the statuses (and an empty
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// GlobalPinInfo).
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//
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// A special case exists for TrackerStatusPinned targets: in this case,
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// TrackerStatusRemote statuses are ignored, so WaitFor will return when
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// all Statuses are Pinned or Remote by default.
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//
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// The Limit parameter allows to specify finer-grained control to, for
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// example, only wait until a number of peers reaches a status.
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func WaitFor(ctx context.Context, c Client, fp StatusFilterParams) (api.GlobalPinInfo, error) {
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ctx, span := trace.StartSpan(ctx, "client/WaitFor")
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defer span.End()
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ctx, cancel := context.WithCancel(ctx)
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defer cancel()
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sf := newStatusFilter()
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go sf.pollStatus(ctx, c, fp)
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go sf.filter(ctx, fp)
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var status api.GlobalPinInfo
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for {
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select {
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case <-ctx.Done():
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return status, ctx.Err()
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case err := <-sf.Err:
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return status, err
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case st, ok := <-sf.Out:
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if !ok { // channel closed
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return status, nil
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}
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status = st
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}
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}
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}
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// StatusFilterParams contains the parameters required
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// to filter a stream of status results.
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type StatusFilterParams struct {
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Cid cid.Cid
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Local bool // query status from the local peer only
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Target api.TrackerStatus
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Limit int // wait for N peers reaching status. 0 == all
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CheckFreq time.Duration
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}
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type statusFilter struct {
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In, Out chan api.GlobalPinInfo
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Done chan struct{}
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Err chan error
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}
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func newStatusFilter() *statusFilter {
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return &statusFilter{
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In: make(chan api.GlobalPinInfo),
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Out: make(chan api.GlobalPinInfo),
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Done: make(chan struct{}),
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Err: make(chan error),
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}
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}
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func (sf *statusFilter) filter(ctx context.Context, fp StatusFilterParams) {
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defer close(sf.Done)
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defer close(sf.Out)
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for {
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select {
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case <-ctx.Done():
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sf.Err <- ctx.Err()
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return
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case gblPinInfo, more := <-sf.In:
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if !more {
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return
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}
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ok, err := statusReached(fp.Target, gblPinInfo, fp.Limit)
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if err != nil {
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sf.Err <- err
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return
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}
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sf.Out <- gblPinInfo
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if !ok {
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continue
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}
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return
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}
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}
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}
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func (sf *statusFilter) pollStatus(ctx context.Context, c Client, fp StatusFilterParams) {
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ticker := time.NewTicker(fp.CheckFreq)
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defer ticker.Stop()
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for {
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select {
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case <-ctx.Done():
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sf.Err <- ctx.Err()
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return
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case <-ticker.C:
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gblPinInfo, err := c.Status(ctx, fp.Cid, fp.Local)
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if err != nil {
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sf.Err <- err
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return
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}
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logger.Debugf("pollStatus: status: %#v", gblPinInfo)
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sf.In <- gblPinInfo
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case <-sf.Done:
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close(sf.In)
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return
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}
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}
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}
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func statusReached(target api.TrackerStatus, gblPinInfo api.GlobalPinInfo, limit int) (bool, error) {
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// Specific case: return error if there are errors
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for _, pinInfo := range gblPinInfo.PeerMap {
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switch pinInfo.Status {
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case api.TrackerStatusUndefined,
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api.TrackerStatusClusterError,
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api.TrackerStatusPinError,
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api.TrackerStatusUnpinError:
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return false, fmt.Errorf("error has occurred while attempting to reach status: %s", target.String())
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}
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}
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// Specific case: when limit it set, just count how many targets we
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// reached.
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if limit > 0 {
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|
total := 0
|
|
for _, pinInfo := range gblPinInfo.PeerMap {
|
|
if pinInfo.Status == target {
|
|
total++
|
|
}
|
|
}
|
|
return total >= limit, nil
|
|
}
|
|
|
|
// General case: all statuses should be the target.
|
|
// Specific case: when looking for Pinned, ignore status remote.
|
|
for _, pinInfo := range gblPinInfo.PeerMap {
|
|
if pinInfo.Status == api.TrackerStatusRemote && target == api.TrackerStatusPinned {
|
|
continue
|
|
}
|
|
if pinInfo.Status == target {
|
|
continue
|
|
}
|
|
return false, nil
|
|
}
|
|
|
|
// All statuses are the target, as otherwise we would have returned
|
|
// false.
|
|
return true, nil
|
|
}
|
|
|
|
// logic drawn from go-ipfs-cmds/cli/parse.go: appendFile
|
|
func makeSerialFile(fpath string, params api.AddParams) (string, files.Node, error) {
|
|
if fpath == "." {
|
|
cwd, err := os.Getwd()
|
|
if err != nil {
|
|
return "", nil, err
|
|
}
|
|
cwd, err = filepath.EvalSymlinks(cwd)
|
|
if err != nil {
|
|
return "", nil, err
|
|
}
|
|
fpath = cwd
|
|
}
|
|
|
|
fpath = filepath.ToSlash(filepath.Clean(fpath))
|
|
|
|
stat, err := os.Lstat(fpath)
|
|
if err != nil {
|
|
return "", nil, err
|
|
}
|
|
|
|
if stat.IsDir() {
|
|
if !params.Recursive {
|
|
return "", nil, fmt.Errorf("%s is a directory, but Recursive option is not set", fpath)
|
|
}
|
|
}
|
|
|
|
sf, err := files.NewSerialFile(fpath, params.Hidden, stat)
|
|
return path.Base(fpath), sf, err
|
|
}
|
|
|
|
// Add imports files to the cluster from the given paths. A path can
|
|
// either be a local filesystem location or an web url (http:// or https://).
|
|
// In the latter case, the destination will be downloaded with a GET request.
|
|
// The AddParams allow to control different options, like enabling the
|
|
// sharding the resulting DAG across the IPFS daemons of multiple cluster
|
|
// peers. The output channel will receive regular updates as the adding
|
|
// process progresses.
|
|
func (c *defaultClient) Add(
|
|
ctx context.Context,
|
|
paths []string,
|
|
params api.AddParams,
|
|
out chan<- api.AddedOutput,
|
|
) error {
|
|
ctx, span := trace.StartSpan(ctx, "client/Add")
|
|
defer span.End()
|
|
|
|
addFiles := make([]files.DirEntry, len(paths))
|
|
for i, p := range paths {
|
|
u, err := url.Parse(p)
|
|
if err != nil {
|
|
close(out)
|
|
return fmt.Errorf("error parsing path: %s", err)
|
|
}
|
|
var name string
|
|
var addFile files.Node
|
|
if strings.HasPrefix(u.Scheme, "http") {
|
|
addFile = files.NewWebFile(u)
|
|
name = path.Base(u.Path)
|
|
} else {
|
|
if params.NoCopy {
|
|
close(out)
|
|
return fmt.Errorf("nocopy option is only valid for URLs")
|
|
}
|
|
name, addFile, err = makeSerialFile(p, params)
|
|
if err != nil {
|
|
close(out)
|
|
return err
|
|
}
|
|
}
|
|
addFiles[i] = files.FileEntry(name, addFile)
|
|
}
|
|
|
|
sliceFile := files.NewSliceDirectory(addFiles)
|
|
// If `form` is set to true, the multipart data will have
|
|
// a Content-Type of 'multipart/form-data', if `form` is false,
|
|
// the Content-Type will be 'multipart/mixed'.
|
|
return c.AddMultiFile(ctx, files.NewMultiFileReader(sliceFile, true), params, out)
|
|
}
|
|
|
|
// AddMultiFile imports new files from a MultiFileReader. See Add().
|
|
func (c *defaultClient) AddMultiFile(
|
|
ctx context.Context,
|
|
multiFileR *files.MultiFileReader,
|
|
params api.AddParams,
|
|
out chan<- api.AddedOutput,
|
|
) error {
|
|
ctx, span := trace.StartSpan(ctx, "client/AddMultiFile")
|
|
defer span.End()
|
|
|
|
defer close(out)
|
|
|
|
headers := make(map[string]string)
|
|
headers["Content-Type"] = "multipart/form-data; boundary=" + multiFileR.Boundary()
|
|
|
|
// This method must run with StreamChannels set.
|
|
params.StreamChannels = true
|
|
queryStr, err := params.ToQueryString()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// our handler decodes an AddedOutput and puts it
|
|
// in the out channel.
|
|
handler := func(dec *json.Decoder) error {
|
|
if out == nil {
|
|
return nil
|
|
}
|
|
var obj api.AddedOutput
|
|
err := dec.Decode(&obj)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
out <- obj
|
|
return nil
|
|
}
|
|
|
|
err = c.doStream(ctx,
|
|
"POST",
|
|
"/add?"+queryStr,
|
|
headers,
|
|
multiFileR,
|
|
handler,
|
|
)
|
|
return err
|
|
}
|