asp net core docker serilog configuration - docker

Question

I have a dot net core 3.1 app that is configured to run in docker containers.
While I have managed to update simple appsettings config using docker -e flag, I am still confused when it comes to a bit complex configuration, for example, serilog config.
appsettings file:
{
"AllowedHosts": "*",
"ConnectionStrings": {
"DefaultConnection": "Host=172.18.101.65;Port=5432;Username=postgres;Password=pgadmin;Database=identityserver;"
},
"Serilog": {
"Using": [],
"MinimumLevel": {
"Default": "Information",
"Override": {
"Microsoft": "Warning",
"System": "Warning"
}
},
"Enrich": [ "FromLogContext", "WithMachineName", "WithProcesssId", "WithThreadId" ],
"WriteTo": [
{
"Name": "Console"
},
{
"Name": "File",
"Args": {
"path": "D:\\Logs\\IDSvr\\Log-.txt",
"outputTemplate": "{Timestamp:G} {Message}{NewLine:1}{Exception:1}",
"rollingInterval": "Day",
"shared": true
}
},
{
"Name": "Seq",
"Args": {
"serverUrl": "http://localhost:8081"
}
}
]
},
.
.
.
}
I could update the connection string using -e ConnectionStrings__DefaultConnection="..." flag, I am not sure how could I update the Serilog's WriteTo configuration section.

Answer 1

WriteTo is a complex object array. Hence, you have to specify the index you want to override. Lets say you want to override:
"Serilog": {
"WriteTo": [
{
"Name": "Console" // this value
},
...
You can select the key by -e Serilog__WriteTo__0__Name due to index 0 in the array. Then just pass it a value you want, like -e Serilog__WriteTo__0__Name=something.
To read that exact value in .NET Core Configuration, use Configuration["Serilog:WriteTo:0:Name"] in the startup pipeline.