Redix problem connecting mix to redis

Hi Elixir team! I am new to this forum. I currently moved to redis sentinel and although production is working fine I am having trouble getting my tests to pass. The error I am seeing is: ** (Mix) Could not start application scrivener: Scrivener.start(:normal, []) returned an error: shutdown: failed to start child: :worker ** (EXIT) an exception was raised: ** (MatchError) no match of right hand side value: {:error, {:EXIT, {%ArgumentError{message: "sentinel address should be specified as a URI or a keyword list, got: nil"}, [{Redix.StartOptions, :normalize_sentinel_address, 2, [file: 'lib/redix/start_options.ex', line: 122]}, {Enum, :"-map/2-lists^map/1-0-", 2, [file: 'lib/enum.ex', line: 1411]}, {Redix.StartOptions, :sanitize_sentinel_opts, 1, [file: 'lib/redix/start_options.ex', line: 79]}, {Redix.StartOptions, :maybe_sanitize_sentinel_opts, 1, [file: 'lib/redix/start_options.ex', line: 68]}, {Redix.StartOptions, :sanitize, 1, [file: 'lib/redix/start_options.ex', line: 51]}, {Redix.Connection, :start_link, 1, [file: 'lib/redix/connection.ex', line: 25]}, {:supervisor, :do_start_child_i, 3, [file: 'supervisor.erl', line: 385]}, {:supervisor, :handle_call, 3, [file: 'supervisor.erl', line: 410]}]}}} (poolboy 1.5.1) src/poolboy.erl:275: :poolboy.new_worker/1 . My test.exs is set up exactly like my prod.exs => ```config :scrivener, Scrivener.Endpoint,
http: [:inet6, port: {:system, “PORT”}],
server: false

Do not print debug messages in production

config :logger, level: :warn

Pull Redis sentinel settings from environment variables

{ redis_pool_size, original_value } = (System.get_env(“REDIS_POOL_SIZE”) || “5”) |> Integer.parse
{ redis_max_overflow, original_value } = (System.get_env(“REDIS_MAX_OVERFLOW”) || “2”) |> Integer.parse
{ redis_sentinel_timeout, original_value } = (System.get_env(“REDIS_SENTINEL_TIMEOUT”) || “10000”) |> Integer.parse

config :redix,
pool_size: redis_pool_size,
max_overflow: redis_max_overflow,
sentinel: [
sentinels: [
System.get_env(“REDIS_SENTINEL_HOST_A”),
System.get_env(“REDIS_SENTINEL_HOST_B”),
System.get_env(“REDIS_SENTINEL_HOST_C”)
],
group: System.get_env(“REDIS_SENTINEL_GROUP”),
timeout: redis_sentinel_timeout
]```. I can see it is a redix issue but not sure how to resolve.

I suspect one of these environment variables isn’t set, that would explain finding a nil in sentinels

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Thanks for the fast reply. By checking my environment variables, I have them connected and they are working in production. I am wondering if it could be a gem/version thing for mix? REDIS_SENTINEL_HOST_A=redis://sentinel004…
REDIS_SENTINEL_HOST_B=redis://sentinel005…
REDIS_SENTINEL_HOST_C=redis://sentinel006…

Try inspecting the values in the config; something is not making it to Redix.

config :redix,
  pool_size: redis_pool_size,
  max_overflow: redis_max_overflow,
  sentinel: [
    sentinels: [
      System.get_env(“REDIS_SENTINEL_HOST_A”),
      System.get_env(“REDIS_SENTINEL_HOST_B”),
      System.get_env(“REDIS_SENTINEL_HOST_C”)
    ] |> IO.inspect(label: "sentinel list"),
    group: System.get_env(“REDIS_SENTINEL_GROUP”),
    timeout: redis_sentinel_timeout
  ]
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Thank you :bowing_man:. It looks like when printing they were coming in as null. I hardcoded redis sentinel endpoints and following error: {%ArgumentError{message: “a host should be specified for each sentinel”}. When looking in redix docs, I see {Redix supports Redis Sentinel by passing a :sentinel
option to start_link/1 (or start_link/2) instead of :host and :port.}. Which is how it looks like I set it up.

1 Like