fails due to no docker

[engineer-plus-plus]

I'm trying to follow instructions in the introduction video. But when I say ./mvnw I get error below. As you may be aware, there is not a word about docker in the intro video. That's not too hip. To resolve: either record a new video or make it work without docker by default.

org.springframework.boot.docker.compose.core.DockerProcessStartException: Unable to start docker process. Is docker correctly installed?
	at org.springframework.boot.docker.compose.core.DockerCli$DockerCommands.getDockerCommand(DockerCli.java:140)
	at org.springframework.boot.docker.compose.core.DockerCli$DockerCommands.<init>(DockerCli.java:129)
	at org.springframework.boot.docker.compose.core.DockerCli.lambda$new$0(DockerCli.java:65)
	at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1220)
	at org.springframework.boot.docker.compose.core.DockerCli.<init>(DockerCli.java:64)
	at org.springframework.boot.docker.compose.core.DockerCompose.get(DockerCompose.java:92)
	at org.springframework.boot.docker.compose.lifecycle.DockerComposeLifecycleManager.getDockerCompose(DockerComposeLifecycleManager.java:156)
	at org.springframework.boot.docker.compose.lifecycle.DockerComposeLifecycleManager.start(DockerComposeLifecycleManager.java:111)
	at org.springframework.boot.docker.compose.lifecycle.DockerComposeListener.onApplicationEvent(DockerComposeListener.java:53)
	at org.springframework.boot.docker.compose.lifecycle.DockerComposeListener.onApplicationEvent(DockerComposeListener.java:35)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:185)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:178)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:156)
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:138)
	at org.springframework.boot.context.event.EventPublishingRunListener.multicastInitialEvent(EventPublishingRunListener.java:136)
	at org.springframework.boot.context.event.EventPublishingRunListener.contextLoaded(EventPublishingRunListener.java:98)
	at org.springframework.boot.SpringApplicationRunListeners.lambda$contextLoaded$4(SpringApplicationRunListeners.java:72)
	at java.base/java.lang.Iterable.forEach(Iterable.java:75)
	at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:118)
	at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:112)
	at org.springframework.boot.SpringApplicationRunListeners.contextLoaded(SpringApplicationRunListeners.java:72)
	at org.springframework.boot.SpringApplication.prepareContext(SpringApplication.java:433)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:334)
	at com.app.Jhip2App.main(Jhip2App.java:70)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:50)
Caused by: org.springframework.boot.docker.compose.core.ProcessStartException: Unable to start command docker version --format {{.Client.Version}}
	at org.springframework.boot.docker.compose.core.ProcessRunner.startProcess(ProcessRunner.java:116)
	at org.springframework.boot.docker.compose.core.ProcessRunner.run(ProcessRunner.java:88)
	at org.springframework.boot.docker.compose.core.ProcessRunner.run(ProcessRunner.java:75)
	at org.springframework.boot.docker.compose.core.DockerCli$DockerCommands.getDockerCommand(DockerCli.java:135)
	... 28 common frames omitted
Caused by: java.io.IOException: Cannot run program "docker": error=2, No such file or directory
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1143)
	at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1073)
	at org.springframework.boot.docker.compose.core.ProcessRunner.startProcess(ProcessRunner.java:106)
	... 31 common frames omitted
Caused by: java.io.IOException: error=2, No such file or directory
	at java.base/java.lang.ProcessImpl.forkAndExec(Native Method)
	at java.base/java.lang.ProcessImpl.<init>(ProcessImpl.java:314)
	at java.base/java.lang.ProcessImpl.start(ProcessImpl.java:244)
	at java.base/java.lang.ProcessBuilder
	```

[mraible]

Can you please share your .yo-rc.json file?

[mshima]

Which video?
Since v8, jhipster doesn’t uses h2 by default. So we use docker to provide a better experience to avoid manually setting up DB server.
If you want to use H2 you should use option --dev-database-type h2Disk.

[mshima]

Closing since there was no response.
If the issue persists please open a new issue following instructions to add a reproduction application.