I have deployed a rails application in a server using capistrano. What is the best way to debug this app in production?
Until now, when I used Apache+Phusion to deploy apps, I would write debug statements in the code and determine what was breaking.
But when I try the same now in the capistrano setup, I don't see the debug statements.
Where should I add the debug statements? In the code base that is pulled from the git repo? Or the current folder of capistrano?
Also, once I add the debug statement, is there anything I need to do to nginx server to reflect this change?
(Earlier, in Apache+Phusion, I used to do touch tmp/restart.txt to reflect the change)
Sorry for these questions, but this is my first time using Capistrano, Nginx.
I was deploying another agent's code, hence I wasn't fully aware of the deployment environment. On probing, I found out that the app server being used was Unicorn.
So, all I had to do to reflect the changes was restart Unicorn server by running unicorn appname restart
Related
I have just started developing a Golang app, and have deployed it on Google App Engine. But, when I try to connect my local server to CloudSQL instance through proxy, I am able to connect only through TCP.
However, when connecting with the same CloudSQL instance in AppEngine, I am able to connect only through UNIX.
To cope with this, I have made changes in my local environment handler file, so that it can adapt to local and GCloud config, but I'm not sure how I can skip the update on just this file for GCloud? Again, I don't want AppEngine to delete this file, I just want the CLI to avoid uploading the new version of the handler file.
I use this command for deploying: gcloud app deploy
Currently, I deploy directly to AppEngine, instead of pushing it through VCS. Also, if there is an option to detect if the app is running on AppEngine, then it'd be really great.
TIA
Got it, in case anyone gets stuck in such situation, we can make use of environment variables set in GCloud AppEngine. Although there is documentation stating the environment variables, I would still give importance to checking the environment variables in Cloud Console.
Documentation link for Go 1.12+ Runtime env:
https://cloud.google.com/appengine/docs/standard/go/runtime
Very inexperienced user here...please be patient!
I inherited maintenance of Heroku app from someone no longer with the company. Having to re-deploy an app update is probably a once-a-year event, and here we are.
The instructions I have include building a standalone jar file containing my app and then deploying it to Heroku. Specifically the procedure for this is to use the Heroku CLI with the following command:
heroku deploy:jar webapp.jar -a my-app
Easy enough. Except he had his own instance of the Heroku CLI, and when I went to download my own copy, it appears that the deploy command no longer exists! Is this the case? Is this a deprecated command? Do I need to go through the process of figuring out how to set up a git repository to deploy this? (We are in fact using git to manage the source for this app, but it's behind our company firewall, so I'm not sure how practical/difficult it will be to set this up for Heroku). I just want to make sure I'm not missing something simple before investing a significant amount of time re-inventing the deployment process. Thanks.
The most popular mechanism is indeed to push the code from git to Heroku, providing the necessary files (i.e. profcile) to deploy the runtime.
An alternative is to create a Docker image and push it to the Heroku Registry (which in your case would require more reworking).
Refer to Deploy with Git, the firewall should not be a problem as Heroku will not access your code, but you will need to perform the push (git push heroku master)
I have to answer my own question because I was able to find the solution.
It turns out there is a plugin available for the heroku CLI that provides the deploy command. Running heroku plugins:install java will install the plugin that provides the deploy command in the heroku CLI.
See https://devcenter.heroku.com/articles/deploying-executable-jar-files for more information.
I'm using Dotenv to populate my environment when deploying and I have a deployment server that contains all the secrets.
I want to be able to do a cap production deploy from my localhost which triggers my deployment server to do a cap production deploy from itself which contains all the secrets not available from everyone's local machines.
Is there any capistrano add on gems that solves this problem? Or can someone point me in the right direction.
I was thinking of setting up a whole new stage that points to the deployment server.
Secrets should not be copied to server while deployment , that is bad as it is vulnerable and we do not change them frequently. They should be placed on server directly to keep it safe , That is the approach I am following, we can use dontev or figaro gem to manage it
Now i'm working on RESTfull API on go, using Windows and goclipse.
Testing environemnt consists of few VMs managed by Vagrant. These machines contain nginx, PostgreSQL etc. The app should be deployed into Docker on the separated VM.
There is no problem to deploy app on first time using guide like here: https://blog.golang.org/docker. I've read a lot of information and guides but still totally confused how to automate deploying process and update go app in docker after some changes in code done. On the current stage changes in code done very often, so deploying should be fast.
Could you please advise me with correct way to setup some kind of local CI for such case? What approach will be better?
Thanks a lot.
Is it possible, and if so, how? I'd like to be able to reach it from my existing Heroku infrastructure.
Will I need a Procfile? From what I understand it's just a standalone binary written in Go! so it shouldn't be that hard to deploy it, I'm just curious how to deploy it because I don't think I understand the ins and outs of Heroku deployment.
Heroku Dynos should not be used to deploy a database application like InfluxDB.
Dynos are ephemeral servers. Data does not persist between dyno restarts and cannot be shared with other dynos. Practically speaking, any database application deployed on a dyno is essentially useless. This is why databases on Heroku (e.g. Postgres) are all Add-ons. InfluxDB should be set up on a different platform (like, AWS EC2 or a VPS) since a Heroku Add-on is not available.
That said, it is possible to deploy InfluxDB to a Heroku dyno.
To get started, it is important to understand the concept of a 'slug'. Slugs are containers (similar to a Docker images) which hold everything needed to run a program on Heroku's infrastructure. To deploy InfluxDB, an InfluxDB slug needs to be created.* There are two ways to create a slug for Go libraries:
Create a slug directly from a Go executable as described here.**
Build the slug from source using the Heroku Go buildpack (explained below).
To build the slug from source using a buildpack, first clone the InfluxDB Github repo. Then add a Procfile at the root of the repo, which tells Heroku the command to run when the dyno starts up.
echo 'web: ./influxd' > Procfile
The Go buildpack requires all dependencies be included in the directory. Use the godep dependency tool to vendor all dependencies into the directory.
go get github.com/tools/godep
godep save
Next, commit the changes made above to the git repo.
git add -A .
git commit -m dependencies
Finally, create a new app and tell it to compile with the Go buildpack.
heroku create -b https://github.com/kr/heroku-buildpack-go.git
git push heroku master
heroku open // Open the newly created InfluxDB instance in the browser.
Heroku will show an error page. An error will be displayed because Heroku's 'web' process type requires an app to listen for incoming requests on the port described by the $PORT environment variable, otherwise it will kill the dyno. InfluxDB's API and admin panel run on ports 8086 and 8083, respectively.
Unfortunately, InfluxDB does not allow those ports to be set from environment variables, only through the config file (/etc/config.toml). A small bash script executed before InfluxDB starts up could set the correct port in the config file before InfluxDB starts up.
Another problem, Heroku only exposes one port per dyno so the API and the admin panel cannot be exposed to the internet at the same time. A smart reverse proxy could work around that issue using Heroku's X-Forwarded-Port request header.
Bottom line, do not use Heroku dynos to run InfluxDB.
* This means the benefits of a standalone Go executable are lost when deploying to Heroku, since it needs to be recompiled for Heroku's stack.
** Creating a slug directly from the InfluxDB executable does not work because there is no built-in way to listen to the right port given by Heroku in the $PORT environment variable.
I like to think anything is possible on a Heroku node when using a custom buildpack, but there are some considerations when hosting with Heroku:
ops, e.g. backup, monitoring (does it entail installing extra services, opening extra ports, etc - Heroku might get in the way here)
performance, considering dyno size
and if you need a larger dyno, cost becomes an issue. You'll get more bang for your buck when you go the IaaS route.
other "features" of a dyno, e.g. disk ephemerality
I highly recommend hosted InfluxDB or spinning up your own on a VPS, all of which you can point your existing Heroku-based apps to. It will then help to get those instances as close together as possible (i.e. same region, or co-located if possible), presuming a need for low latency between DB and app stack.