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Troubleshooting Launcher and Kubernetes:
Verify Configuration Files#

Symptoms#

  • Unable to access the RStudio Workbench home page
  • Unable to start new remote sessions in Kubernetes

Error messages#

When inspecting the log files for RStudio Workbench, Launcher, and Kubernetes, you might see errors similar to the following:

RStudio Workbench Home Page

Job information unavailable. Sessions are read-only.
Contact your administrator for help.

Error occurred while executing method (100)
Connection refused

void rstudio::core::http::TcpIpAsyncConnector::handleConnect(const rstudio_boost::system::error_code&, rstudio_boost::asio::ip::basic_resolver<rstudio_boost::asio::ip::tcp>::iterator) /var/lib/jenkins/workspace/IDE/pro-pipeline/v1.2-patch/src/cpp/core/include/core/http/TcpIpAsyncConnector.hpp:197

File: /var/lib/rstudio-server/monitor/log/rstudio-server.log

04 May 2020 03:36:03 [rserver] ERROR system error 111 (Connection refused); OCCURRED AT: void rstudio::core::http::TcpIpAsyncConnector::handleConnect(const rstudio_boost::system::error_code&, rstudio_boost::asio::ip::basic_resolver<rstudio_boost::asio::ip::tcp>::iterator) /var/lib/jenkins/workspace/IDE/pro-pipeline/v1.2-patch/src/cpp/core/include/core/http/TcpIpAsyncConnector.hpp:197; LOGGED FROM: rstudio::server::job_launcher::{anonymous}::ensureServerUserIsLauncherAdmin()::__lambda7::__lambda10 /var/lib/jenkins/workspace/IDE/pro-pipeline/v1.2-patch/src/cpp/server/ServerJobLauncher.cpp:678

Possible cause#

For RStudio Workbench, Launcher, and Kubernetes to function properly, the configuration files should contain all of the required configuration values for RStudio Workbench, Launcher, the Kubernetes plugin, and communication/mounts for Kubernetes.

The following troubleshooting steps will help you verify that you have created all of the necessary configuration files and input the required configuration values.

Troubleshooting steps#

Verify that the following configuration files exist:

  • /etc/rstudio/rserver.conf
  • /etc/rstudio/launcher.conf
  • /etc/rstudio/launcher.kubernetes.profiles.conf
  • /etc/rstudio/launcher.kubernetes.conf
  • /etc/rstudio/launcher-mounts

And verify that their contents match the default values in the documentation for integrating RStudio Workbench with Kubernetes.

A full set of example configuration files is included below for reference. You can compare your configuration files to these examples and make any necessary changes to your configuration.

Example configuration: rserver.conf#

File: /etc/rstudio/rserver.conf

# Server Configuration File

www-port=80

# Launcher Config
launcher-address=127.0.0.1
launcher-port=5559
launcher-sessions-enabled=1
launcher-default-cluster=Kubernetes
launcher-sessions-callback-address=http://rstudio-server-pro:yourcompany.com:80
launcher-sessions-container-run-as-root=0
launcher-sessions-create-container-user=1

Example configuration: launcher.conf#

File: /etc/rstudio/launcher.conf

[server]
address=127.0.0.1
port=5559
server-user=rstudio-server
admin-group=rstudio-server
authorization-enabled=1
thread-pool-size=4
enable-debug-logging=1

[cluster]
name=Local
type=Local

[cluster]
name=Kubernetes
type=Kubernetes

Example configuration: launcher.kubernetes.profiles.conf#

File: /etc/rstudio/launcher.kubernetes.profiles.conf

[*]
default-cpus=1
default-mem-mb=512
max-cpus=2
max-mem-mb=1024
container-images=rstudio/r-session-complete:centos7-2021.09.0-351.pro6
default-container-image=rstudio/r-session-complete:centos7-2021.09.0-351.pro6
allow-unknown-images=1

Example configuration: launcher.kubernetes.conf#

File: /etc/rstudio/launcher.kubernetes.conf

api-url=https://kubernetes.yourcompany.com
auth-token=eyJhbGciOiJSUzI1NiIsImtpZCI6IiJ9.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJyc3R1ZGlvIiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZWNyZXQubmFtZSI6ImpvYi1sYXVuY2hlci10b2tlbi1nNXA2aiIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50Lm5hbWUiOiJqb2ItbGF1bmNoZXIiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiJmZTk4N2MwNi1kZDRlLTRmZTktOTA0Yy1iZDY2MjAwNzIxNjIiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6cnN0dWRpbzpqb2ItbGF1bmNoZXIifQ.BRTX51Xj14AwTe_HuKD8RofWxgLwhobhHqRUlPTSCcHSoe3Olv4iXfrdjWOPFTEv2NAJaLSpjozSUELW8n5kxZzJnUUgWqgrCMwIUoZEC-JHncDACD-76W0Qohy9wAF20g6gmjEqEDzFpeOTB8O1HpBYArTd60iU4naN72Foj6_2NyXCETNZ24rIyIDTCX1MQTm64N0o4NnVL-zYl8ifHWlJMCBI3NMpYL014er3JLYyVKeIxPjRPryML48DhD4NZyDNzzPUr4Os_urAeht4wqScsmaTZjUQARYJ0FBgCp1C6vc1fZdAqJAIIJoHblOxNIv5wPLgsn2b3VuiBf92Zg
certificate-authority=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

Example configuration: launcher-mounts#

File: /etc/rstudio/launcher-mounts

# Required home directory mount for RSP, Launcher, and Kubernetes
Host: 172.31.0.123
Path: /home/{USER}
MountPath: /home/{USER}
ReadOnly: false
Cluster: Kubernetes

Restart services and test#

After updating your configuration files, restart the RStudio Workbench and Launcher services:

Terminal

$ sudo rstudio-server restart
$ sudo rstudio-launcher restart

Verify that the services are running and try to start a new session from the RStudio Workbench home page.

If the services are still not starting or you are still experiencing errors when starting a new session, then proceed to
Step 6 - Skip Certificate Verification.

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