Distributed Services with Go (Pragmatic Bookshelf)
PragmaticBookshelf
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Take your Go skills to the next level by learning how to design, develop, and deploy a distributed service. Start from the bare essentials of storage handling, then work your way through networking a client and server, and finally to distributing server instances, deployment, and testing. All this will make coding in your day job or side projects easier, faster, and more fun.
Travis Jeffery @travisjeffery
edited by Dawn Schanafelt and Katharine Dvorak @katied
Take your Go skills to the next level by learning how to design, develop, and deploy a distributed service. Start from the bare essentials of storage handling, then work your way through networking a client and server, and finally to distributing server instances, deployment, and testing. All this will make coding in your day job or side projects easier, faster, and more fun.
Lay out your applications and libraries to be modular and easy to maintain. Build networked, secure clients and servers with gRPC. Monitor your applications with metrics, logs, and traces to make them debuggable and reliable. Test and benchmark your applications to ensure they’re correct and fast. Build your own distributed services with service discovery and consensus. Write CLIs to configure your applications. Deploy applications to the cloud with Kubernetes and manage them with your own Kubernetes Operator.
Dive into writing Go and join the hundreds of thousands who are using it to build software for the real world.
Don’t forget you can get 35% off with your Devtalk discount! Just use the coupon code “devtalk.com" at checkout 
Latest Threads About This Book
Hi @travisjeffery, in the Close function on page 33 it seems there is an error, after the i.mmap.Sync is called, the memory is not unmapp...
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@travisjeffery
The book in many places stands for Raft consensus algorithm being able to replicate all data across the servers. The trut...
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@travisjeffery The code in server.go is not consistent with the generated grpc code.
I see that the code in the git repo was updated, bu...
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@travisjeffery
PDF - Page 35
No need to synchronize this function? How mmap work with multiple writers?.
func (i *index) Write(off uin...
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Can I run proglog from within Intellij without too much trouble? When I try I get
Error: open : no such file or directory
I assume thi...
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On page 44:
Now add the following Append() function below setup():
“Append() function” should read “Append() method”.
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On page 42:
We test that we can append a record to a segment, read back the same record, and eventually hit the configured max size for...
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On page 40:
IsMaxed returns whether the segment has reached its max size, either by writing too much to the store or the index. If you ...
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On page 40:
Read(off uint64) returns the record for the given offset. Similar to writes, to read a record the segment must first transl...
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On page 18
These protobuf messages are equivalent to the Go structs shown earlier.
You’ll notice the two syntaxes are very similar: in...
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rec, err := s.Log.Read(req.Offset)
I get a compiler error saying there is no “Read” method available on the Log struct. Any ideas on wh...
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When trying to run protoc at this point, I get a different output, I am not sure why. Also, tests fail.
I even tried to see if it would ...
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Title: Distributed Services with Go
Page 32: protoc api/v1/*.proto
–go_out=.
–go_opt=paths=source_relative
–proto_path=.
When I r...
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I’m not quite sure what’s going on here, but I’m unable to have to containers successfully complete the Readiness/Liveness checks. I’m im...
New
Just a note for other readers as I have resolved my issue.
On page 141 of the text, we are told to update our TLSConfig in the test to e...
New
Hey @travisjeffery,
After following all steps in Ch10, helm install proglog deploy/proglog fails to start the service. Initially, it was...
New
@travisjeffery
As per instructions up to page 132, I have checked the code against the downloadable resources and A/B’d back and forth. ...
New
Page 72 shows implementation of the nearestMultiple function. (as per below)
func nearestMultiple(j, k uint64) uint64 {
if...
New
@travisjeffery,
In the “Error Handling in gRPC” section (page 63 of the print version) it is said that we should use error codes from th...
New
@travisjeffery
When writing agent_test.go in page 134, the package name is agent_test when other tests use the same package name. For ex...
New
Distributed Services with Go (pg. 207 && pg. 228)
Looking for suggestions to allow load-balancing to work from outside the k8s n...
New
When trying to generate the protobuf .go file, I receive this error:
Unknown flag: --go_opt
libprotoc 3.12.3
MacOS 11.3.1
Googling ...
New
When I attempt to go get github.com/tysonmote/gommap I get an error gommap.go:60:15: undefined: mmap_syscall. Has anyone on an M1 mac bee...
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It seem to me that in early editions of the book whole server.go file was located in grpc folder. (instructions in the start of chapter 4...
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Page 39, Print Edition
The description of how the offset is calculated for the index under the definition of Append() is confusing and I...
New
Howdy readers! Travis Jeffrey’s book, Distributed Services with Go, is now in print for those of you who prefer analog. Please support yo...
New
Page 28: It implements io.ReaderAt on the store type.
Sorry if it’s a dumb question but was the io.ReaderAt supposed to be io.ReadAt?
...
New
Hi TJ, Suggestions on Chapter 2 of the book:
To send data (such as your structs) over a network
Not sure whether a layperson would tra...
New
Hi Travis! Thank you for the cool book! :slight_smile:
I made a list of issues and thought I could post them chapter by chapter. I’m rev...
New
Test Discovery and Balancing End-to-End
Reader is instructed to Run your tests again and watch them pass. However, the reader will encou...
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Most Active This Week
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Most Active Last Three Years
Page 28: It implements io.ReaderAt on the store type.
Sorry if it’s a dumb question but was the io.ReaderAt supposed to be io.ReadAt?
...
New
I’m not quite sure what’s going on here, but I’m unable to have to containers successfully complete the Readiness/Liveness checks. I’m im...
New
Hi @travisjeffery, in the Close function on page 33 it seems there is an error, after the i.mmap.Sync is called, the memory is not unmapp...
New
@travisjeffery
The book in many places stands for Raft consensus algorithm being able to replicate all data across the servers. The trut...
New
Most Active Over Three Years
When trying to generate the protobuf .go file, I receive this error:
Unknown flag: --go_opt
libprotoc 3.12.3
MacOS 11.3.1
Googling ...
New
page 20: … protoc command…
I had to additionally run the following go get commands in order to be able to compile protobuf code using go...
New
Take your Go skills to the next level by learning how to design, develop, and deploy a distributed service. Start from the bare essential...
New
In Chapter 3, the source for index introduces Config on page 31, followed by more code including tests; Config isn’t introduced until pag...
New
This test is broken right out of the box…
— FAIL: TestAgent (7.82s)
agent_test.go:77:
Error Trace: agent_test.go:77
agent_test.go:...
New
Hi Travis! Thank you for the cool book! :slight_smile:
I made a list of issues and thought I could post them chapter by chapter. I’m rev...
New
Distributed Services With Go -
I went to SecureYourServices folder and executed make gencert. I am getting the following error.
2020/0...
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When a store is closed, it just closes the files but items in the buffer are not written to file before closing. So we need an additional...
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Page 19: “Let’s start by adding a function for users to create our HTTP server. Inside your server directory, create a file called server...
New
When I attempt to go get github.com/tysonmote/gommap I get an error gommap.go:60:15: undefined: mmap_syscall. Has anyone on an M1 mac bee...
New
@travisjeffery
When writing agent_test.go in page 134, the package name is agent_test when other tests use the same package name. For ex...
New
Once deployed, I am not able to access the service outside the prolog pods. I can run the client successfully and access the service from...
New
Page 72 shows implementation of the nearestMultiple function. (as per below)
func nearestMultiple(j, k uint64) uint64 {
if...
New
Code at the end of page for the WriteALogPackage/internal/log/segment.go
says p, err := s.store.Read(pos), should be ReadAt I think
New
Hey y’all, just wanted to provide some context for removing the testing chapters from the table of contents.
For all books PragProg has ...
New
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