Presented at: All Things Open 2019 Presented by: Lin Sun, IBM Find more by Lin Sun: https://www.slideshare.net/LinSun4/

1. Photo by Markos Mant on Unsplash
The Crazy Service
Mesh Ecosystem Lin Sun
Senior Technical Staff Member, IBM
Twitter: @linsun_unc
Koto Feja / Getty Images

2. IBM Cloud
Why Service Mesh?

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try {
HttpResponse response = httpClient.get(
“http://secretsauce.internal/recipe”);
cook(response.body);
} catch (NetworkError ne) {
fixmePleaseOMG(ne);
}
Credit to Louis Ryan for this fun example

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try {
// Load balancing
IP ip = DNS.lookupSRV(“secretsauce.internal”).pickOne();
HttpResponse response = httpClient.open(ip).get(
“http://secretsauce.internal/recipe”);
cook(response.body);
} catch (NetworkError ne) {
fixmePleaseOMG(ne);
}
Credit to Louis Ryan for this fun example

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for (int i = 0; i < 3; i++) { // Retry
try {
IP ip = DNS.lookupSRV(“secretsauce.internal”).pickOne();
HttpResponse response = httpClient.open(ip).get(
“http://secretsauce.internal/recipe”);
cook(response.body);
} catch (NetworkError ne) {
if (i == 2) fixmePleaseOMG(ne);
else Thread.sleep(random(5) * 1000);
}
}
Credit to Louis Ryan for this fun example

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Secret key = new Secret(new File(“/somewhere/safe/key”);
for (int i = 0; i < 3; i++) {
try {
IP ip = DNS.lookupSRV(“secretsauce.internal”).pickOne();
HttpResponse response = httpClient.open(ip)
.setHeader(“Authorization”, key.toString())
.get(“http://secretsauce.internal/recipe”);
cook(response.body);
} catch (NetworkError ne) {
if (i == 2) fixmePleaseOMG(ne);
else Thread.sleep(random(5) * 1000);
}
}
Credit to Louis Ryan for this fun example

7. IBM Cloud
Secret key = new Secret(new File(“/somewhere/safe/key”);
for (int i = 0; i < 3; i++) {
try {
IP ip = DNS.lookupSRV(“secretsauce.internal”).pickOne();
HttpResponse response = httpClient.open(ip)
.setHeader(“Authorization”, key.toString())
.get(“http://secretsauce.internal/recipe”);
log(“Success”);
cook(response.body);
} catch (NetworkError ne) {
log(“Failed”);
if (i == 2) fixmePleaseOMG(ne);
else Thread.sleep(random(5) * 1000);
}
}
Credit to Louis Ryan for this fun example

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Imagine you have
many services like
this room.
Each may use
different languages.

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Each service owner
needs to build all
these?
Can we trust each
service owner to
build all these
consistently?

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What exactly is
service mesh?

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A Service Mesh is…
Language neutral Dummy initialization Program the attachment to be smartVisibility +

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Before Service Mesh

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Add to mesh command
Dummy initialization Visibility +

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apply policy command
Program the attachment to be smart
mTLS
mTLS

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Key Benefits
- Provides language neutral standard attachment to
your application container
- Provides user interfaces to configure policies for the
attachment, without redeploying your application
- Enables clear separation from the application (Dev)
and attachment (Ops)

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Do you really need
service mesh?

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Navigate the Ecosystem
- Is it an open-source project governed by a diverse
contributor base?
- Does it use a proprietary proxy?
- Is the project part of a foundation?
- Does it contain the feature set you need?
- Does it integrate well with the existing system you
have?

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Key Service Mesh Players
- Envoy
- Istio
- Linkerd
- Consul Connect
- AWS App Mesh
- Kong Kuma
- AspenMesh
- Service Mesh Interface

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Envoy
- Created at Lyft
- Graduated CNCF Project
- Written in C++
- Out of process architecture
- Advanced load balancing
- APIs for config mgmt
- Observability

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Istio
- Co-founded by IBM, Google and Lyft
- Use Envoy as sidecar
- Open service mesh platform
- Very rich feature sets
- Knative built on top of Istio

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Linkerd
- CNCF incubating project
- Use home grown sidecar written in Rust
- mTLS among services, observability, traffic shifting
- Focus on Kubernetes
- Known for simple UX and zero config

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Consul Connect
- Developed by Hashicorp
- Open-source project
- Extends existing Consul offering
- Use Envoy as sidecar
- Integrate with Vault to manage security
certificates
- mTLS among microservices, observability & L7
traffic management

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App Mesh
- Cloud service hosted by AWS
- Not open source
- Support for all compute services in AWS
- Use envoy as sidecar proxy
- Similar control plane as Istio’s
- Focus on traffic routing and telemetry

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Kong Kuma
- Universal open-source control plane
- Use envoy as sidecar proxy
- Run natively across Kubernetes and VM
- mTLS among services, observability, proxy config
templating
- Multi-tenancy

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AspenMesh
- A supported distribution of the Istio project
- UI/Dashboard to view and manage Istio resources
- Istio Vet
- Interesting business model

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Service Mesh Interface
- Relatively New, announced KubeCon EU 2019
- Microsoft, partnered with Solo.io, Linkerd, Hashicorp
and Vmware etc.
- Attempt to find a common ground for service mesh
on Kubernetes

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Demo time!

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• Preview available around
KubeCon US 2019
• Final book available by
end of 2019