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Showing posts from April, 2017

Build React Native App (4) - Redux, Jest, and NativeBase

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From this blog, typescript feature will be added. There are couple of ways to implement static type checking like; flow from facebook, PropTypes and Typescript.Typescript is well integrated with Visual Studio Code and supports better linter, error messages, and intellisense.Reference siteGithub Sample Ex4Currnet versionD:\GitRepo\reactnative>npm --version 6.3.0 D:\GitRepo\reactnative>react-native --version react-native-cli: 2.0.1 react-native: n/a - not inside a React Native project directory D:\GitRepo\reactnative>yarn --version 1.9.4 Creating React Native App$ react-native init ex4 If you want to specify the version, add "--version 0.57.3" at the end.Add NativeBase to React Native$ npm install native-base --save ... + native-base@2.8.1 added 71 packages from 42 contributors, removed 50 packages, updated 829 packages and audited 34989 packages in 138.542s found 0 vulnerabilities $ $ yarn yarn install v1.9.4 warning package-lock.json found. Your project contains l…

DCOS Troubleshooting

Reference[DC/OS Troubleshooting 1.9] (https://docs.mesosphere.com/1.9/installing/troubleshooting/) NTP ServersUseful commandSSH to your master node and enter this command to view the logs from boot time: journalctl -u dcos-adminrouter -bSSH to your agent node and enter this command to view the logs from boot time: journalctl -u dcos-mesos-slave -bSSH to your master node and enter this command to view the logs from boot time: journalctl -u dcos-marathon -bFailed to start Navstar: A distributed systems & network overlay orchestration engine[dcosadmin@dcostest03 ~]$ service dcos-navstar restart Redirecting to /bin/systemctl restart dcos-navstar.service ==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units === Authentication is required to manage system services or units. Authenticating as: dcosadmin Password: ==== AUTHENTICATION COMPLETE === Job for dcos-navstar.service failed because the control process exited with error code. See "systemctl status dcos-navstar.service…

How to add agents to DC/OS 1.9

To test the tweeter apps from DC/OS tutorial, we are going to add 4 more agents into our system; 172.16.110.33 to 172.16.110.36General steps to add new node will beAdding new nodes to genconf/config.yaml from the Bootstrap nodeRunning prerequistics from the Bootstrap nodeRunning preflight from the Bootstrap nodeEstablish ssh between the Bootstrap nodes to new nodes; genereate key and copy the key to agentsInstall agent as described from DCOS Adding NodesUpdate detect_ip script from installation folderRunning postflight from the Bootstrap nodeReferenceDCOS Backup from BootstrapDOCS Adding NodesStackoverflow FAQArchive installation folderGo to the bootstrap node which is 172.16.110.20 for me and archive DCOS install files[dcosadmin@dcotest01 ~]$ cd genconf/serve [dcosadmin@dcotest01 serve]$ sudo tar cf dcos-install.tar * [dcosadmin@dcotest01 serve]$ ll total 613600 drwxrwxrwx. 2 root root 131 Apr 20 16:37 bootstrap -rw-rw-rw-. 1 root root 40 Apr 21 09:00 bootstrap.latest…

Install DCOS on CentOS 7

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Install DC/OS on CentOS on VMWare FreeESXiInstall DC/OS on CentOS on VMWare FreeESXiPrerequriementReferecneInstall CentOSCreate One CentOS with following configurationInstall DockerAdditional Centos Command to helpInstall DC-OSCreate SSh Private / Publick keyCreate ip-detect scriptInstallSummaryPrerequriementDC/OS: 1.9CenOS: 7.3Minimum 4 nodesBootstrap node: 1 node with 2 Cores, 16 GB RAM, 60 GB HDD3 Nodes(1 Master and 2 Agent nodes): 2 cores, 16GB RAM, 60GBReferecneDC/OS Official InstallationDC/OS InstallInstall CentOSDuring installing the CentOS, create user called dcosadmin and check administrator group. This user will be used during entire installation processI used 4 nodes as DC/OS recommendedComputerNameIP AddessComputer SpecDescriptiondcostest01172.16.110.202 core, 16GB, 100 GB DiskBootstrap Computerdcostest02172.16.110.302 core, 16GB, 100 GB DiskAgent1-Masterdcostest03172.16.110.312 core, 16GB, 100 GB DiskAgent2-Agent Publicdcostest04172.16.110.322 core, 16GB, 100 GB DiskAgent…