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control/controlclient: do not periodically print full netmap

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The netmaps can get really large.
Printing, processing, and uploading them is expensive.
Only print the header on an ongoing basis.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
This commit is contained in:
Josh Bleecher Snyder 2021-08-17 10:05:20 -07:00 committed by Josh Bleecher Snyder
parent a666b546fb
commit 4c8b5fdec4
2 changed files with 12 additions and 7 deletions
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11
control/controlclient/direct.go
View File

@ -872,15 +872,14 @@ func (c *Direct) sendMapRequest(ctx context.Context, maxPolls int, cb func(*netm
nm.LocalPort = c.localPort
c.mu.Unlock()
// Printing the netmap can be extremely verbose, but is very
// handy for debugging. Let's limit how often we do it.
// Code elsewhere prints netmap diffs every time, so this
// occasional full dump, plus incremental diffs, should do
// the job.
// Occasionally print the netmap header.
// This is handy for debugging, and our logs processing
// pipeline depends on it. (TODO: Remove this dependency.)
// Code elsewhere prints netmap diffs every time they are received.
now := c.timeNow()
if now.Sub(c.lastPrintMap) >= 5*time.Minute {
c.lastPrintMap = now
c.logf("[v1] new network map[%d]:\n%s", i, nm.Concise())
c.logf("[v1] new network map[%d]:\n%s", i, nm.VeryConcise())
}
c.mu.Lock()

8
types/netmap/netmap.go
View File

@ -87,6 +87,12 @@ func (nm *NetworkMap) Concise() string {
return buf.String()
}
func (nm *NetworkMap) VeryConcise() string {
buf := new(strings.Builder)
nm.printConciseHeader(buf)
return buf.String()
}
// printConciseHeader prints a concise header line representing nm to buf.
//
// If this function is changed to access different fields of nm, keep
@ -132,7 +138,7 @@ func (a *NetworkMap) equalConciseHeader(b *NetworkMap) bool {
return (a.Debug == nil && b.Debug == nil) || reflect.DeepEqual(a.Debug, b.Debug)
}
// printPeerConcise appends to buf a line repsenting the peer p.
// printPeerConcise appends to buf a line representing the peer p.
//
// If this function is changed to access different fields of p, keep
// in nodeConciseEqual in sync.