Error: The file /path/to/BGPalerter/config.yml is not valid yml: unknown tag !<tag

[alias-dmesg]

Describe the bug
New BGPalerter installation on Ubuntu. Configuration done on first run. Crtl to exit and second run of the binary. Exception on second run of the binary.

Provide an example

vagrant@srv:~/BGPalerter$ ./bgpalerter-linux-x64
Impossible to load config.yml. A default configuration file has been generated.
BGPalerter, version: 1.24.0 environment: production
Loaded config: /home/vagrant/BGPalerter/config.yml
? The file prefixes.yml cannot be loaded. Do you want to auto-configure BGPalerter? Yes
? Which Autonomous System(s) you want to monitor? (comma-separated, e.g. 2914,3333) 3333
? Are there sub-prefixes delegated to other ASes? (e.g. sub-prefixes announced by customers) No
? Do you want to be notified when your AS is announcing a new prefix? Yes
Generating monitoring rule for 193.0.22.0/23
Generating monitoring rule for 193.0.10.0/23
Generating monitoring rule for 193.0.12.0/23
Generating monitoring rule for 2001:67c:2e8::/48
Generating monitoring rule for 193.0.20.0/23
Generating monitoring rule for 193.0.18.0/23
Generating monitoring rule for 193.0.0.0/21
Generating generic monitoring rule for AS 3333
Done!
Monitoring 193.0.0.0/21
Monitoring 193.0.22.0/23
Monitoring 193.0.18.0/23
Monitoring 193.0.20.0/23
Monitoring 193.0.12.0/23
Monitoring 193.0.10.0/23
Monitoring 2001:67c:2e8::/48
Monitoring AS 3333
^C

vagrant@srv:~/BGPalerter$ ./bgpalerter-linux-x64
pkg/prelude/bootstrap.js:1248
      throw error;
      ^

Error: The file /home/vagrant/BGPalerter/config.yml is not valid yml: unknown tag !<tag
    at Object.<anonymous> (/snapshot/build/src/env.js:116:11)
    at Module._compile (pkg/prelude/bootstrap.js:1324:22)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:993:10)
    at Module.load (internal/modules/cjs/loader.js:813:32)
    at Function.Module._load (internal/modules/cjs/loader.js:725:14)
    at Module.require (internal/modules/cjs/loader.js:850:19)
    at Module.require (pkg/prelude/bootstrap.js:1229:31)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (/snapshot/build/src/consumer.js:8:35)
    at Module._compile (pkg/prelude/bootstrap.js:1324:22)

Expected behavior
bgpalerter should read config.yml and prefixes.yml and continue monitoring prefixes for our ASN. I use your ASN on first try with same results. For this report, I also tried 3333 with same results.

Are you using the binary or the source code?
I'm using binary for Linux

vagrant@srv:~/BGPalerter$ wget https://github.com/nttgin/BGPalerter/releases/download/v1.24.0/bgpalerter-linux-x64

My server is on Ubuntu 19.10

Your information
Alfred
Simula

[massimocandela]

Hello Alfred,

Thanks for reporting.
The issue doesn't look coming from the auto configuration wizard but from the config.yml file which is automatically downloaded from github.

Could you please attach config.yml?

edit: reading from your description, it looks like you didn't edit config.yml. If you did, please check it for correctness and especially wipe possible credentials before sharing!

[massimocandela]

I was able to reproduce it. If the download of the default config file fails, BGPalerter tries to persist a basic config that is shipped with the application. This second step in some cases was not working properly. I fixed this in #222

It will go out with the next release. Thanks for reporting.

[massimocandela]

I forgot to mention: to solve your problem just delete config.yml, download this one and rename it to config.yml