toxiproxy-cli - `sortedAttributes` sort by `attribute.key` instead `attribute.value`

[jesseward]

Summary

When "inspecting" a toxic via toxiproxy-cli (eg: toxiproxy-cli inspect mysql), sortedAttributes fails to handle non float types.

To work around this issue, I chose sort via the attribute.key instead of the attribute.value.

The function being modified in this PR is only used when rendering to the console. Other uses of the attribute fields are cast or serialized into their correct type elsewhere in the codebase.

 » toxiproxy-cli inspect mysql
Name: mysql	Listen: [::]:4306	Upstream: yahoo.ca:80
======================================================================
Upstream toxics:
debug_upstream:	type=debug	stream=upstream	toxicity=1.00	attributes=[panic: interface conversion: interface {} is string, not float64

goroutine 1 [running]:
main.sortedAttributes(0x140000204b0)
	/Users/jesseward/code/toxiproxy/cmd/cli/cli.go:629 +0x1e4
main.listToxics({0x14000082180?, 0x1, 0x10243d486?}, {0x10241e65b?, 0x8?})
	/Users/jesseward/code/toxiproxy/cmd/cli/cli.go:653 +0x440
main.inspectProxy(0x140001ce300, 0x18?)
	/Users/jesseward/code/toxiproxy/cmd/cli/cli.go:364 +0x728
main.cliCommands.withToxi.func2(0x140001ce300)
	/Users/jesseward/code/toxiproxy/cmd/cli/cli.go:272 +0xec
github.com/urfave/cli/v2.(*Command).Run(0x140001cc580, 0x140001ce300, {0x140001a86e0, 0x2, 0x2})
	/Users/jesseward/go/pkg/mod/github.com/urfave/cli/[email protected]/command.go:274 +0x730
github.com/urfave/cli/v2.(*Command).Run(0x140001ccdc0, 0x140001ce140, {0x1400012c180, 0x3, 0x3})
	/Users/jesseward/go/pkg/mod/github.com/urfave/cli/[email protected]/command.go:267 +0x940
github.com/urfave/cli/v2.(*App).RunContext(0x140001c6000, {0x1025c8e98?, 0x102923580}, {0x1400012c180, 0x3, 0x3})
	/Users/jesseward/go/pkg/mod/github.com/urfave/cli/[email protected]/app.go:332 +0x518
github.com/urfave/cli/v2.(*App).Run(...)
	/Users/jesseward/go/pkg/mod/github.com/urfave/cli/[email protected]/app.go:309
main.main()
	/Users/jesseward/code/toxiproxy/cmd/cli/cli.go:104 +0x358

Testing

Create a toxic with an int-ish type and a string

dist/toxiproxy-server & ; dist/toxiproxy-cli create -l :4306 -u yahoo.ca:80 mysql && \
dist/toxiproxy-cli toxic add -u -a number=1 -a a_string=yahoo -t debug mysql

update _examples/toxics/debug_toxic.go to include

// DebugToxic prints bytes processed through pipe.
type DebugToxic struct {
	Number  int    `json:"number"`
	AString string `json:"a_string"`
}

» go run cmd/cli/cli.go inspect mysql                                                                                                       jesseward@Jesses-MacBook-Pro
Name: mysql     Listen: [::]:4306       Upstream: yahoo.ca:80
======================================================================
Upstream toxics:
debug_upstream: type=debug      stream=upstream toxicity=1.00   attributes=[    a_string=yahoo  number=1        ]

Downstream toxics:
Proxy has no Downstream toxics enabled.

Hint: add a toxic with `toxiproxy-cli toxic add`

[jesseward]

I have signed the CLA!

[casperisfine]

@Shopify/resiliency-acceleration could you have a look at this PR please?