how to skip the wrong json format data,but not exit

[TwitchChen]

Please note that the Consul Template issue tracker is reserved
for bug reports and enhancements. For general usage questions,
please use the Consul mailing list:

https://groups.google.com/forum/#!forum/consul-tool

Consul Template version

consul-template v0.19.0 (33b34b3)

Configuration

consul{
    address = "127.0.0.1:8500"
}

log_level = "warn"
pid_file  = "/pacloud/cdm/base/2.0/logs/consul-template.pid"


template{
    source      = "/pacloud/cdm/base/2.0/conf/db-specific/nginx.tmpl"
    destination = "/pacloud/cdm/base/2.0/conf/db-specific/ng.conf.tmp"
    command     = "/pacloud/cdm/base/2.0/conf/db-specific/ng.sh"
    command_timeout = "60s"
}

# Copy-paste your Consul Template template here
{{ range tree "db/nginx" }}{{ $ng_service := .Key }}{{ with $d := .Value | parseJSON }}{{ $network_type := $d.network_type }}{{ $ng_site := $d.ng_site }}{{ range $listeners := $d.listeners }}{{ $instance_name := $listeners.Instance_name}}{{ $vip := $listeners.CIDR}}{{ $listener_port := $listeners.listener_port }}{{ $cpu := $listeners.limit_cpu }}{{ range $rss := $d.rss }}{{ if $rss.enable | parseBool }}{{ $ip := $rss.ip }}{{ $port := $rss.port }}{{ with $hosts := $listeners.hosts }}
{{ $ng_service }}:{{ $hosts.master  }}:{{ $hosts.slave }}:{{ $network_type }}:{{ $ng_site }}:{{ $instance_name }}:{{ $vip }}:{{ $listener_port }}:{{  $cpu }}:{{ $ip }}:{{ $port }}{{ end }}{{ end }}{{ end }}{{ end }}{{ end }}
{{ end }}

Command

# Place your Consul Template command here
the command    always exit with 0

Debug output

2018/12/19 09:32:58.234332 [ERR] (cli) /pacloud/cdm/base/2.0/conf/db-specific/nginx.tmpl: execute: template: :1:75: executing "" at : error calling parseJSON: invalid character 's' after object key:value pair

Expected behavior

When there is a wrong json format data, the consul-template should skip this data instead of exiting.
And the other json data can still be processed。
What should I do to avoid consul-template launches when this happens?

Actual behavior

the consul-template dead

[pierresouchay]

This is not possible AFAIK, consul-templaterb does support this if it is a frequent issue on your side, you might use this for your use-case (see get_value_json in https://github.com/criteo/consul-templaterb/blob/master/TemplateAPI.md#get-the-result-of-a-single-value) ... there are many examples on how doing this in https://github.com/criteo/consul-templaterb/tree/master/samples

[TwitchChen]

Ok,i see,thanks.

[niko]

I just ran into the same issue, namely: consul-template is crashing if the template contains a parseJSON function and the json data is corrupt. I could totally live with consul-template crashing on startup on corrupt json. But IMHO an already running instance should not crash, if one of the keys in consul is changed from correct to corrupt json. I think instead it should log the error and not rerender anything.