This update provides:
1) workaround around the build failures. In
summary, it forces the download of some packages during the build
process.
2) update the set of packages that should go inside the vendor
directory
3) Update the dockerfile to use go 1.10
Change-Id: I2bfd090ce0f25b0c10aa214755ae2da7e5384d60
diff --git a/vendor/github.com/coreos/etcd/raft/log_unstable.go b/vendor/github.com/coreos/etcd/raft/log_unstable.go
new file mode 100644
index 0000000..263af9c
--- /dev/null
+++ b/vendor/github.com/coreos/etcd/raft/log_unstable.go
@@ -0,0 +1,159 @@
+// Copyright 2015 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package raft
+
+import pb "github.com/coreos/etcd/raft/raftpb"
+
+// unstable.entries[i] has raft log position i+unstable.offset.
+// Note that unstable.offset may be less than the highest log
+// position in storage; this means that the next write to storage
+// might need to truncate the log before persisting unstable.entries.
+type unstable struct {
+ // the incoming unstable snapshot, if any.
+ snapshot *pb.Snapshot
+ // all entries that have not yet been written to storage.
+ entries []pb.Entry
+ offset uint64
+
+ logger Logger
+}
+
+// maybeFirstIndex returns the index of the first possible entry in entries
+// if it has a snapshot.
+func (u *unstable) maybeFirstIndex() (uint64, bool) {
+ if u.snapshot != nil {
+ return u.snapshot.Metadata.Index + 1, true
+ }
+ return 0, false
+}
+
+// maybeLastIndex returns the last index if it has at least one
+// unstable entry or snapshot.
+func (u *unstable) maybeLastIndex() (uint64, bool) {
+ if l := len(u.entries); l != 0 {
+ return u.offset + uint64(l) - 1, true
+ }
+ if u.snapshot != nil {
+ return u.snapshot.Metadata.Index, true
+ }
+ return 0, false
+}
+
+// maybeTerm returns the term of the entry at index i, if there
+// is any.
+func (u *unstable) maybeTerm(i uint64) (uint64, bool) {
+ if i < u.offset {
+ if u.snapshot == nil {
+ return 0, false
+ }
+ if u.snapshot.Metadata.Index == i {
+ return u.snapshot.Metadata.Term, true
+ }
+ return 0, false
+ }
+
+ last, ok := u.maybeLastIndex()
+ if !ok {
+ return 0, false
+ }
+ if i > last {
+ return 0, false
+ }
+ return u.entries[i-u.offset].Term, true
+}
+
+func (u *unstable) stableTo(i, t uint64) {
+ gt, ok := u.maybeTerm(i)
+ if !ok {
+ return
+ }
+ // if i < offset, term is matched with the snapshot
+ // only update the unstable entries if term is matched with
+ // an unstable entry.
+ if gt == t && i >= u.offset {
+ u.entries = u.entries[i+1-u.offset:]
+ u.offset = i + 1
+ u.shrinkEntriesArray()
+ }
+}
+
+// shrinkEntriesArray discards the underlying array used by the entries slice
+// if most of it isn't being used. This avoids holding references to a bunch of
+// potentially large entries that aren't needed anymore. Simply clearing the
+// entries wouldn't be safe because clients might still be using them.
+func (u *unstable) shrinkEntriesArray() {
+ // We replace the array if we're using less than half of the space in
+ // it. This number is fairly arbitrary, chosen as an attempt to balance
+ // memory usage vs number of allocations. It could probably be improved
+ // with some focused tuning.
+ const lenMultiple = 2
+ if len(u.entries) == 0 {
+ u.entries = nil
+ } else if len(u.entries)*lenMultiple < cap(u.entries) {
+ newEntries := make([]pb.Entry, len(u.entries))
+ copy(newEntries, u.entries)
+ u.entries = newEntries
+ }
+}
+
+func (u *unstable) stableSnapTo(i uint64) {
+ if u.snapshot != nil && u.snapshot.Metadata.Index == i {
+ u.snapshot = nil
+ }
+}
+
+func (u *unstable) restore(s pb.Snapshot) {
+ u.offset = s.Metadata.Index + 1
+ u.entries = nil
+ u.snapshot = &s
+}
+
+func (u *unstable) truncateAndAppend(ents []pb.Entry) {
+ after := ents[0].Index
+ switch {
+ case after == u.offset+uint64(len(u.entries)):
+ // after is the next index in the u.entries
+ // directly append
+ u.entries = append(u.entries, ents...)
+ case after <= u.offset:
+ u.logger.Infof("replace the unstable entries from index %d", after)
+ // The log is being truncated to before our current offset
+ // portion, so set the offset and replace the entries
+ u.offset = after
+ u.entries = ents
+ default:
+ // truncate to after and copy to u.entries
+ // then append
+ u.logger.Infof("truncate the unstable entries before index %d", after)
+ u.entries = append([]pb.Entry{}, u.slice(u.offset, after)...)
+ u.entries = append(u.entries, ents...)
+ }
+}
+
+func (u *unstable) slice(lo uint64, hi uint64) []pb.Entry {
+ u.mustCheckOutOfBounds(lo, hi)
+ return u.entries[lo-u.offset : hi-u.offset]
+}
+
+// u.offset <= lo <= hi <= u.offset+len(u.offset)
+func (u *unstable) mustCheckOutOfBounds(lo, hi uint64) {
+ if lo > hi {
+ u.logger.Panicf("invalid unstable.slice %d > %d", lo, hi)
+ }
+ upper := u.offset + uint64(len(u.entries))
+ if lo < u.offset || hi > upper {
+ u.logger.Panicf("unstable.slice[%d,%d) out of bound [%d,%d]", lo, hi, u.offset, upper)
+ }
+}