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config.rs
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config.rs
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//! Configuration for a Kubelet
//!
//! You must provide a Config when instantiating a kubelet. Although you can create a Config
//! directly, it is usually easier to use one of the following functions:
//!
//! * [`Config::default_config`] - use the defaults for everything
//! * [`Config::new_from_file`] - use the values in the specified file
//! * [`Config::new_from_flags`] - use the values specified on the command line or in
//! environment variables (requires you to turn on the "cli" feature)
//! * [`Config::new_from_file_and_flags`] - use the values specified on the command line
//! or in environment variables, but falling back to the specified configuration file
//! (requires you to turn on the "cli" feature)
use std::net::{IpAddr, Ipv4Addr, Ipv6Addr, ToSocketAddrs};
use std::path::{Path, PathBuf};
#[cfg(any(feature = "cli", feature = "docs"))]
use std::iter::FromIterator;
#[cfg(feature = "cli")]
use structopt::StructOpt;
use std::collections::HashMap;
use serde::Deserialize;
const DEFAULT_PORT: u16 = 3000;
const DEFAULT_MAX_PODS: u16 = 110;
const BOOTSTRAP_FILE: &str = "/etc/kubernetes/bootstrap-kubelet.conf";
/// The configuration needed for a kubelet to run properly.
///
/// This can be configured manually in your code or if you are exposing a CLI, use the
/// [`Config::new_from_flags`] (this requires the "cli" feature to
/// be enabled).
///
/// Use [`Config::default_config`] to generate a config with all
/// of the default values set.
#[derive(Clone, Debug)]
pub struct Config {
/// The ip address the node is exposed on
pub node_ip: IpAddr,
/// The hostname of the node
pub hostname: String,
/// The node's name
pub node_name: String,
/// The Kubelet server configuration
pub server_config: ServerConfig,
/// The directory where the Kubelet will store data
pub data_dir: PathBuf,
/// Labels to add when registering the node in the cluster
pub node_labels: HashMap<String, String>,
/// The maximum pods for this kubelet (reported to apiserver)
pub max_pods: u16,
/// The location of the tls bootstrapping file
pub bootstrap_file: PathBuf,
/// Whether to allow modules to be loaded directly from local
/// filesystem paths, as well as from registries
pub allow_local_modules: bool,
/// Registries that should be accessed using HTTP instead of
/// HTTPS.
pub insecure_registries: Option<Vec<String>>,
/// The directory kubelet should watch for new plugin sockets
pub plugins_dir: PathBuf,
}
/// The configuration for the Kubelet server.
#[derive(Clone, Debug)]
pub struct ServerConfig {
/// The ip address the Kubelet server is running on
pub addr: IpAddr,
/// The port the Kubelet server is running on
pub port: u16,
/// Path to kubelet TLS certificate.
pub cert_file: PathBuf,
/// Path to kubelet TLS private key.
pub private_key_file: PathBuf,
}
#[derive(Debug, Default, serde::Deserialize)]
struct ConfigBuilder {
// Some -> Ok(v) = it was present and the value parsed as v
// -> Err(e) = it was present but bad - e described the problem
// None = it wasn't present
#[serde(
default,
rename = "nodeIP",
deserialize_with = "try_deserialize_ip_addr"
)]
pub node_ip: Option<anyhow::Result<IpAddr>>,
#[serde(default, rename = "hostname")]
pub hostname: Option<String>,
#[serde(default, rename = "nodeName")]
pub node_name: Option<String>,
#[serde(default, rename = "dataDir")]
pub data_dir: Option<PathBuf>,
#[serde(default, rename = "bootstrapFile")]
pub bootstrap_file: Option<PathBuf>,
#[serde(default, rename = "nodeLabels")]
pub node_labels: Option<HashMap<String, String>>,
#[serde(default, rename = "maxPods", deserialize_with = "try_deserialize_u16")]
pub max_pods: Option<anyhow::Result<u16>>,
#[serde(
default,
rename = "listenerAddress",
deserialize_with = "try_deserialize_ip_addr"
)]
pub server_addr: Option<anyhow::Result<IpAddr>>,
#[serde(
default,
rename = "listenerPort",
deserialize_with = "try_deserialize_u16"
)]
pub server_port: Option<anyhow::Result<u16>>,
#[serde(default, rename = "tlsCertificateFile")]
pub server_tls_cert_file: Option<PathBuf>,
#[serde(default, rename = "tlsPrivateKeyFile")]
pub server_tls_private_key_file: Option<PathBuf>,
#[serde(default, rename = "allowLocalModules")]
pub allow_local_modules: Option<bool>,
#[serde(default, rename = "insecureRegistries")]
pub insecure_registries: Option<Vec<String>>,
#[serde(default, rename = "pluginsDir")]
pub plugins_dir: Option<PathBuf>,
}
struct ConfigBuilderFallbacks {
hostname: fn() -> String,
data_dir: fn() -> PathBuf,
bootstrap_file: fn() -> PathBuf,
cert_path: fn(data_dir: &Path) -> PathBuf,
key_path: fn(data_dir: &Path) -> PathBuf,
plugins_dir: fn(data_dir: &Path) -> PathBuf,
node_ip: fn(hostname: &mut String, preferred_ip_family: &IpAddr) -> IpAddr,
}
impl Config {
/// Returns a Config object set with all of the defaults.
///
/// Useful for cases when you don't want to set most of the values yourself. The
/// preferred_ip_family argument takes an IpAddr that is either V4 or V6 to
/// indicate the preferred IP family to use for defaults
pub fn default_config(preferred_ip_family: &IpAddr) -> anyhow::Result<Self> {
let hostname = default_hostname()?;
let data_dir = default_data_dir()?;
let cert_file = default_cert_path(&data_dir);
let private_key_file = default_key_path(&data_dir);
let plugins_dir = default_plugins_path(&data_dir);
Ok(Config {
node_ip: default_node_ip(&mut hostname.clone(), preferred_ip_family)?,
node_name: sanitize_hostname(&hostname),
node_labels: HashMap::new(),
hostname,
data_dir,
max_pods: DEFAULT_MAX_PODS,
bootstrap_file: PathBuf::from(BOOTSTRAP_FILE),
allow_local_modules: false,
insecure_registries: None,
plugins_dir,
server_config: ServerConfig {
addr: match preferred_ip_family {
IpAddr::V4(_) => IpAddr::V4(Ipv4Addr::UNSPECIFIED),
IpAddr::V6(_) => IpAddr::V6(Ipv6Addr::UNSPECIFIED),
},
port: DEFAULT_PORT,
cert_file,
private_key_file,
},
})
}
fn new_from_builder(builder: ConfigBuilder) -> Self {
let fallbacks = ConfigBuilderFallbacks {
hostname: || default_hostname().expect("unable to get default hostname"),
data_dir: || default_data_dir().expect("unable to get default data directory"),
cert_path: default_cert_path,
key_path: default_key_path,
plugins_dir: default_plugins_path,
node_ip: |hn, ip| default_node_ip(hn, ip).expect("unable to get default node IP"),
bootstrap_file: || PathBuf::from(BOOTSTRAP_FILE),
};
ConfigBuilder::build(builder, fallbacks).unwrap()
}
/// Parses the specified config file and sets the proper defaults.
/// If the specified file does not exist, this function panics.
/// It is up to callers of the function to ensure any file they specify exists.
pub fn new_from_file(filename: PathBuf) -> Self {
let builder = ConfigBuilder::from_config_file(filename).unwrap();
Config::new_from_builder(builder)
}
/// Parses all command line flags and sets the proper defaults. The version
/// of your application should be passed to set the proper version for the CLI
#[cfg(any(feature = "cli", feature = "docs"))]
#[cfg_attr(feature = "docs", doc(cfg(feature = "cli")))]
pub fn new_from_flags(version: &str) -> Self {
let app = Opts::clap().version(version);
let opts = Opts::from_clap(&app.get_matches());
let builder = ConfigBuilder::from_opts(opts);
Config::new_from_builder(builder)
}
/// Parses the specified config file (or the default config file if no file is
/// specified and the default config file exists) and command line flags and
/// sets the proper defaults. The version of your application should be passed
/// to set the proper version for CLI flags.
///
/// If the config file is specified but does not exist, this function panics.
/// It is up to callers of the function to ensure any file they specify exists.
/// If no file is specified, and the default config file does not exist, then
/// this is not an error and the configuration is determined solely from the
/// CLI flags.
#[cfg(any(feature = "cli", feature = "docs"))]
#[cfg_attr(feature = "docs", doc(cfg(feature = "cli")))]
pub fn new_from_file_and_flags(version: &str, config_file_path: Option<PathBuf>) -> Self {
match config_file_path {
None => {
let default_path = default_config_file_path();
if default_path.exists() {
Config::new_from_file_and_flags_impl(version, default_path)
} else {
Config::new_from_flags(version)
}
}
Some(path) => Config::new_from_file_and_flags_impl(version, path),
}
}
#[cfg(any(feature = "cli", feature = "docs"))]
#[cfg_attr(feature = "docs", doc(cfg(feature = "cli")))]
fn new_from_file_and_flags_impl(version: &str, config_file_path: PathBuf) -> Self {
// TODO: reduce duplication
let app = Opts::clap().version(version);
let opts = Opts::from_clap(&app.get_matches());
let cli_builder = ConfigBuilder::from_opts(opts);
let config_file_builder = ConfigBuilder::from_config_file(config_file_path);
let builder = config_file_builder.unwrap().with_override(cli_builder); // if the config file is actually malformed then we should halt even if there are CLI values
Config::new_from_builder(builder)
}
}
impl Default for Config {
fn default() -> Self {
Self::default_config(&IpAddr::V4(Ipv4Addr::LOCALHOST)) // indicate we want IPv4 by default
.expect("Could not create default config")
}
}
#[cfg(any(feature = "cli", feature = "docs"))]
fn ok_result_of<T>(value: Option<T>) -> Option<anyhow::Result<T>> {
value.map(Ok)
}
impl ConfigBuilder {
#[cfg(any(feature = "cli", feature = "docs"))]
#[cfg_attr(feature = "docs", doc(cfg(feature = "cli")))]
fn from_opts(opts: Opts) -> Self {
let node_labels: Vec<(String, String)> = opts
.node_labels
.iter()
.filter_map(|i| split_one_label(i))
.collect();
ConfigBuilder {
node_ip: ok_result_of(opts.node_ip),
node_name: opts.node_name,
node_labels: if node_labels.is_empty() {
None
} else {
Some(HashMap::from_iter(node_labels))
},
bootstrap_file: Some(opts.bootstrap_file),
hostname: opts.hostname,
data_dir: opts.data_dir,
max_pods: ok_result_of(opts.max_pods),
allow_local_modules: opts.allow_local_modules,
insecure_registries: opts.insecure_registries.map(parse_comma_separated),
plugins_dir: opts.plugins_dir,
server_addr: ok_result_of(opts.addr),
server_port: ok_result_of(opts.port),
server_tls_cert_file: opts.cert_file,
server_tls_private_key_file: opts.private_key_file,
}
}
fn from_config_file(config_file_path: PathBuf) -> anyhow::Result<ConfigBuilder> {
if !config_file_path.exists() {
return Ok(ConfigBuilder::default());
}
let config_file = std::fs::File::open(config_file_path)?;
ConfigBuilder::from_reader(config_file)
}
fn from_reader<R>(reader: R) -> anyhow::Result<ConfigBuilder>
where
R: std::io::Read,
{
serde_json::from_reader(reader).map_err(anyhow::Error::new)
}
#[cfg(any(feature = "cli", feature = "docs", test))]
fn with_override(self, other: Self) -> Self {
ConfigBuilder {
node_ip: other.node_ip.or(self.node_ip),
node_name: other.node_name.or(self.node_name),
node_labels: other.node_labels.or(self.node_labels),
hostname: other.hostname.or(self.hostname),
data_dir: other.data_dir.or(self.data_dir),
max_pods: other.max_pods.or(self.max_pods),
server_addr: other.server_addr.or(self.server_addr),
server_port: other.server_port.or(self.server_port),
server_tls_cert_file: other.server_tls_cert_file.or(self.server_tls_cert_file),
bootstrap_file: other.bootstrap_file.or(self.bootstrap_file),
allow_local_modules: other.allow_local_modules.or(self.allow_local_modules),
insecure_registries: other.insecure_registries.or(self.insecure_registries),
plugins_dir: other.plugins_dir.or(self.plugins_dir),
server_tls_private_key_file: other
.server_tls_private_key_file
.or(self.server_tls_private_key_file),
}
}
fn build(self, fallbacks: ConfigBuilderFallbacks) -> anyhow::Result<Config> {
let empty_ip_addr = IpAddr::V4(std::net::Ipv4Addr::UNSPECIFIED);
let hostname = self.hostname.unwrap_or_else(fallbacks.hostname);
let data_dir = self.data_dir.unwrap_or_else(fallbacks.data_dir);
let bootstrap_file = self.bootstrap_file.unwrap_or_else(fallbacks.bootstrap_file);
let plugins_dir = self
.plugins_dir
.unwrap_or_else(|| (fallbacks.plugins_dir)(&data_dir));
let server_addr = self
.server_addr
.unwrap_or(Ok(empty_ip_addr))
.map_err(|e| invalid_config_value_error(e, "server address"))?;
let server_tls_cert_file = self
.server_tls_cert_file
.unwrap_or_else(|| (fallbacks.cert_path)(&data_dir));
let server_tls_private_key_file = self
.server_tls_private_key_file
.unwrap_or_else(|| (fallbacks.key_path)(&data_dir));
let server_port = self
.server_port
.unwrap_or(Ok(DEFAULT_PORT))
.map_err(|e| invalid_config_value_error(e, "server port"))?;
let node_ip = self
.node_ip
.unwrap_or_else(|| Ok((fallbacks.node_ip)(&mut hostname.clone(), &server_addr)))
.map_err(|e| invalid_config_value_error(e, "node IP"))?;
let node_name = self
.node_name
.unwrap_or_else(|| sanitize_hostname(&hostname));
let max_pods = self
.max_pods
.unwrap_or(Ok(DEFAULT_MAX_PODS))
.map_err(|e| invalid_config_value_error(e, "maximum pods"))?;
Ok(Config {
node_ip,
node_name,
node_labels: self.node_labels.unwrap_or_else(HashMap::new),
hostname,
data_dir,
max_pods,
bootstrap_file,
allow_local_modules: self.allow_local_modules.unwrap_or(false),
insecure_registries: self.insecure_registries,
plugins_dir,
server_config: ServerConfig {
cert_file: server_tls_cert_file,
private_key_file: server_tls_private_key_file,
addr: server_addr,
port: server_port,
},
})
}
}
fn try_deserialize_ip_addr<'de, D>(d: D) -> Result<Option<anyhow::Result<IpAddr>>, D::Error>
where
D: serde::Deserializer<'de>,
{
let s = String::deserialize(d)?;
let addr = s.parse::<IpAddr>().map_err(anyhow::Error::new);
Ok(Some(addr))
}
// This type signature is required by Serde `deserialize_with`.
#[allow(clippy::unnecessary_wraps)]
fn try_deserialize_u16<'de, D>(d: D) -> Result<Option<anyhow::Result<u16>>, D::Error>
where
D: serde::Deserializer<'de>,
{
let n = u16::deserialize(d).map_err(|e| anyhow::Error::msg(format!("{}", e)));
Ok(Some(n))
}
/// CLI options that can be configured for Kubelet
///
/// These can be parsed from args using `Opts::into_app()`
#[derive(StructOpt, Clone, Debug)]
#[cfg(any(feature = "cli", feature = "docs"))]
#[cfg_attr(feature = "docs", doc(cfg(feature = "cli")))]
#[structopt(
name = "krustlet",
about = "A kubelet for running WebAssembly workloads"
)]
pub struct Opts {
#[structopt(
short = "a",
long = "addr",
env = "KRUSTLET_ADDRESS",
help = "The address krustlet should listen on"
)]
addr: Option<IpAddr>,
#[structopt(
short = "p",
long = "port",
env = "KRUSTLET_PORT",
help = "The port krustlet should listen on. Defaults to 3000"
)]
port: Option<u16>,
#[structopt(
long = "max-pods",
env = "MAX_PODS",
help = "The maximum pods for this kubelet (reported to apiserver). Defaults to 110"
)]
max_pods: Option<u16>,
#[structopt(
long = "cert-file",
env = "KRUSTLET_CERT_FILE",
help = "The path to kubelet TLS certificate. Defaults to $KRUSTLET_DATA_DIR/config/krustlet.crt"
)]
cert_file: Option<PathBuf>,
#[structopt(
long = "private-key-file",
env = "KRUSTLET_PRIVATE_KEY_FILE",
help = "The path to kubelet TLS key. Defaults to $KRUSTLET_DATA_DIR/config/krustlet.key"
)]
private_key_file: Option<PathBuf>,
#[structopt(
short = "n",
long = "node-ip",
env = "KRUSTLET_NODE_IP",
help = "The IP address of the node registered with the Kubernetes master. Defaults to the IP address of the host name in DNS as a best effort try at a default"
)]
node_ip: Option<IpAddr>,
#[structopt(
long = "node-labels",
env = "NODE_LABELS",
use_delimiter = true,
help = "Labels to add when registering the node in the cluster.
Labels must be key=value pairs separated by ','.
Labels in the 'kubernetes.io' namespace must begin with an allowed prefix
(kubelet.kubernetes.io, node.kubernetes.io) or be in the specifically allowed set
(beta.kubernetes.io/arch, beta.kubernetes.io/instance-type, beta.kubernetes.io/os,
failure-domain.beta.kubernetes.io/region, failure-domain.beta.kubernetes.io/zone,
failure-domain.kubernetes.io/region, failure-domain.kubernetes.io/zone,
kubernetes.io/arch, kubernetes.io/hostname, kubernetes.io/instance-type,
kubernetes.io/os)"
)]
node_labels: Vec<String>,
#[structopt(
long = "hostname",
env = "KRUSTLET_HOSTNAME",
help = "The hostname for this node, defaults to the hostname of this machine"
)]
hostname: Option<String>,
#[structopt(
long = "node-name",
env = "KRUSTLET_NODE_NAME",
help = "The name for this node in Kubernetes, defaults to the hostname of this machine"
)]
node_name: Option<String>,
#[structopt(
long = "data-dir",
env = "KRUSTLET_DATA_DIR",
help = "The data path (logs, container images, etc) for krustlet storage. Defaults to $HOME/.krustlet"
)]
data_dir: Option<PathBuf>,
#[structopt(
long = "bootstrap-file",
env = "KRUSTLET_BOOTSTRAP_FILE",
help = "The path to the bootstrap config",
default_value = BOOTSTRAP_FILE
)]
bootstrap_file: PathBuf,
#[structopt(
long = "plugins-dir",
env = "KRUSTLET_PLUGINS_DIR",
help = "The path to the directory to watch for new plugins. Defaults to $KRUSTLET_DATA_DIR/plugins"
)]
plugins_dir: Option<PathBuf>,
#[structopt(
long = "x-allow-local-modules",
env = "KRUSTLET_ALLOW_LOCAL_MODULES",
help = "(Experimental) Whether to allow loading modules directly from the filesystem"
)]
allow_local_modules: Option<bool>,
#[structopt(
long = "insecure-registries",
env = "KRUSTLET_INSECURE_REGISTRIES",
help = "Registries that should be accessed over HTTP instead of HTTPS (comma separated)"
)]
insecure_registries: Option<String>,
}
fn default_hostname() -> anyhow::Result<String> {
hostname::get()?
.into_string()
.map_err(|_| anyhow::anyhow!("invalid utf-8 hostname string"))
}
fn default_data_dir() -> anyhow::Result<PathBuf> {
Ok(dirs::home_dir()
.ok_or_else(|| anyhow::anyhow!("Unable to get home directory"))?
.join(".krustlet"))
}
// Some hostnames (particularly local ones) can have uppercase letters, which is
// disallowed by the DNS spec used in kubernetes naming. This sanitizes those
// names
fn sanitize_hostname(hostname: &str) -> String {
// TODO: Are there other sanitation steps we should do here?
hostname.to_lowercase()
}
// Attempt to get the node IP address in the following order (this follows the
// same pattern as the Kubernetes kubelet):
// 1. Lookup the IP from node name by DNS
// 2. Try to get the IP from the network interface used as default gateway
// (unimplemented for now because it doesn't work across platforms)
fn default_node_ip(hostname: &mut String, preferred_ip_family: &IpAddr) -> anyhow::Result<IpAddr> {
// NOTE: As of right now, we don't have cloud providers. In the future if
// that is the case, we will need to add logic for looking up the IP and
// hostname using the cloud provider as they do in the kubelet
// To use the local resolver, we need to add a port to the hostname. Doesn't
// matter which one, it just needs to be a valid socket address
hostname.push_str(":80");
Ok(hostname
.to_socket_addrs()?
.find(|i| {
!i.ip().is_loopback()
&& !i.ip().is_multicast()
&& !i.ip().is_unspecified()
&& is_same_ip_family(&i.ip(), preferred_ip_family)
})
.ok_or_else(|| {
anyhow::anyhow!(
"unable to find default IP address for node. Please specify a node IP manually"
)
})?
.ip())
}
fn default_key_path(data_dir: &Path) -> PathBuf {
data_dir.join("config/krustlet.key")
}
fn default_cert_path(data_dir: &Path) -> PathBuf {
data_dir.join("config/krustlet.crt")
}
fn default_plugins_path(data_dir: &Path) -> PathBuf {
data_dir.join("plugins")
}
#[cfg(any(feature = "cli", feature = "docs"))]
fn default_config_file_path() -> PathBuf {
dirs::home_dir()
.unwrap()
.join(".krustlet/config/config.json")
}
fn is_same_ip_family(first: &IpAddr, second: &IpAddr) -> bool {
match first {
IpAddr::V4(_) => second.is_ipv4(),
IpAddr::V6(_) => second.is_ipv6(),
}
}
#[cfg(any(feature = "cli", feature = "docs"))]
fn split_one_label(in_string: &str) -> Option<(String, String)> {
let mut splitter = in_string.splitn(2, '=');
match splitter.next() {
Some("") | None => None,
Some(key) => match splitter.next() {
Some(val) => Some((key.to_string(), val.to_string())),
None => Some((key.to_string(), String::new())),
},
}
}
fn invalid_config_value_error(e: anyhow::Error, value_name: &str) -> anyhow::Error {
let context = format!("invalid {} in configuration file: {}", value_name, e);
e.context(context)
}
fn parse_comma_separated(source: String) -> Vec<String> {
source.split(',').map(|s| s.trim().to_owned()).collect()
}
#[cfg(test)]
mod test {
use super::*;
fn builder_from_json_string(json: &str) -> anyhow::Result<ConfigBuilder> {
ConfigBuilder::from_reader(json.as_bytes())
}
fn fallbacks() -> ConfigBuilderFallbacks {
ConfigBuilderFallbacks {
node_ip: |_, _| IpAddr::V4(std::net::Ipv4Addr::new(4, 4, 4, 4)),
hostname: || "fallback-hostname".to_owned(),
data_dir: || PathBuf::from("/fallback/data/dir"),
cert_path: |_| PathBuf::from("/fallback/cert/path"),
key_path: |_| PathBuf::from("/fallback/key/path"),
plugins_dir: |_| PathBuf::from("/fallback/plugins/dir"),
bootstrap_file: || PathBuf::from("/fallback/bootstrap_file.txt"),
}
}
#[test]
fn config_file_inputs_are_respected_if_present() {
let config_builder = builder_from_json_string(
r#"{
"listenerPort": 1234,
"listenerAddress": "172.182.192.1",
"hostname": "krusty-host",
"dataDir": "/krusty/data/dir",
"maxPods": 400,
"nodeIP": "173.183.193.2",
"nodeLabels": {
"label1": "val1",
"label2": "val2"
},
"nodeName": "krusty-node",
"tlsCertificateFile": "/my/secure/cert.pfx",
"tlsPrivateKeyFile": "/the/key",
"bootstrapFile": "/the/bootstrap/file.txt",
"allowLocalModules": true,
"insecureRegistries": [
"local",
"dev"
],
"pluginsDir": "/some/plugins"
}"#,
);
let config = config_builder.unwrap().build(fallbacks()).unwrap();
assert_eq!(config.server_config.port, 1234);
assert_eq!(format!("{}", config.server_config.addr), "172.182.192.1");
assert_eq!(
config.server_config.cert_file.to_string_lossy(),
"/my/secure/cert.pfx"
);
assert_eq!(
config.server_config.private_key_file.to_string_lossy(),
"/the/key"
);
assert_eq!(
config.bootstrap_file.to_string_lossy(),
"/the/bootstrap/file.txt"
);
assert_eq!(config.node_name, "krusty-node");
assert_eq!(config.hostname, "krusty-host");
assert_eq!(config.data_dir.to_string_lossy(), "/krusty/data/dir");
assert_eq!(format!("{}", config.node_ip), "173.183.193.2");
assert_eq!(config.max_pods, 400);
assert_eq!(config.allow_local_modules, true);
assert_eq!(config.node_labels.len(), 2);
assert_eq!(config.node_labels.get("label1"), Some(&("val1".to_owned())));
assert_eq!(config.insecure_registries.clone().unwrap().len(), 2);
assert_eq!(&config.insecure_registries.clone().unwrap()[0], "local");
assert_eq!(&config.insecure_registries.unwrap()[1], "dev");
assert_eq!(&config.plugins_dir.to_string_lossy(), "/some/plugins");
}
#[test]
fn config_fallbacks_are_respected() {
let config_builder = builder_from_json_string(
r#"{
"listenerPort": 2345,
"listenerAddress": "173.183.193.2",
"nodeLabels": {
"label": "val"
},
"nodeName": "krustsome-node"
}"#,
);
let config = config_builder.unwrap().build(fallbacks()).unwrap();
assert_eq!(config.server_config.port, 2345);
assert_eq!(format!("{}", config.server_config.addr), "173.183.193.2");
assert_eq!(
config.server_config.cert_file.to_string_lossy(),
"/fallback/cert/path"
);
assert_eq!(
config.server_config.private_key_file.to_string_lossy(),
"/fallback/key/path"
);
assert_eq!(config.node_name, "krustsome-node");
assert_eq!(config.hostname, "fallback-hostname");
assert_eq!(config.data_dir.to_string_lossy(), "/fallback/data/dir");
assert_eq!(format!("{}", config.node_ip), "4.4.4.4");
assert_eq!(config.node_labels.get("label"), Some(&("val".to_owned())));
assert_eq!(
&config.plugins_dir.to_string_lossy(),
"/fallback/plugins/dir"
);
}
#[test]
fn defaults_are_respected() {
let config_builder = builder_from_json_string(
r#"{
}"#,
);
let config = config_builder.unwrap().build(fallbacks()).unwrap();
assert_eq!(config.server_config.port, 3000);
assert_eq!(config.max_pods, 110);
assert_eq!(format!("{}", config.server_config.addr), "0.0.0.0");
assert_eq!(
config.server_config.cert_file.to_string_lossy(),
"/fallback/cert/path"
);
assert_eq!(
config.server_config.private_key_file.to_string_lossy(),
"/fallback/key/path"
);
assert_eq!(config.node_name, "fallback-hostname");
assert_eq!(config.hostname, "fallback-hostname");
assert_eq!(config.data_dir.to_string_lossy(), "/fallback/data/dir");
assert_eq!(format!("{}", config.node_ip), "4.4.4.4");
assert_eq!(config.allow_local_modules, false);
assert_eq!(config.insecure_registries, None);
assert_eq!(config.node_labels.len(), 0);
assert_eq!(
&config.plugins_dir.to_string_lossy(),
"/fallback/plugins/dir"
);
}
#[test]
fn derived_defaults_are_respected() {
let config_builder = builder_from_json_string(
r#"{
"hostname": "k"
}"#,
);
let config = config_builder.unwrap().build(fallbacks()).unwrap();
assert_eq!(config.node_name, "k");
assert_eq!(config.hostname, "k");
}
#[test]
fn merging_overrides_all_values() {
let base_values = builder_from_json_string(
r#"{
"listenerPort": 1234,
"listenerAddress": "172.182.192.1",
"hostname": "krusty-host",
"dataDir": "/krusty/data/dir",
"maxPods": 20,
"nodeIP": "173.183.193.2",
"nodeLabels": {
"label1": "val1",
"label2": "val2"
},
"nodeName": "krusty-node",
"allowLocalModules": true,
"insecureRegistries": ["local1", "local2"],
"pluginsDir": "/some/plugins",
"tlsCertificateFile": "/my/secure/cert.pfx",
"tlsPrivateKeyFile": "/the/key"
}"#,
);
let override_values = builder_from_json_string(
r#"{
"listenerPort": 5678,
"listenerAddress": "171.181.191.21",
"hostname": "krusty-host-2",
"dataDir": "/krusty/data/dir/2",
"maxPods": 30,
"nodeIP": "173.183.193.22",
"nodeLabels": {
"label21": "val21",
"label22": "val22"
},
"nodeName": "krusty-node-2",
"allowLocalModules": false,
"insecureRegistries": ["local"],
"pluginsDir": "/other/plugins",
"tlsCertificateFile": "/my/secure/cert-2.pfx",
"tlsPrivateKeyFile": "/the/2nd/key"
}"#,
);
let config_builder = base_values.unwrap().with_override(override_values.unwrap());
let config = config_builder.build(fallbacks()).unwrap();
assert_eq!(config.server_config.port, 5678);
assert_eq!(format!("{}", config.server_config.addr), "171.181.191.21");
assert_eq!(
config.server_config.cert_file.to_string_lossy(),
"/my/secure/cert-2.pfx"
);
assert_eq!(
config.server_config.private_key_file.to_string_lossy(),
"/the/2nd/key"
);
assert_eq!(config.node_name, "krusty-node-2");
assert_eq!(config.hostname, "krusty-host-2");
assert_eq!(config.max_pods, 30);
assert_eq!(config.data_dir.to_string_lossy(), "/krusty/data/dir/2");
assert_eq!(format!("{}", config.node_ip), "173.183.193.22");
assert_eq!(config.allow_local_modules, false);
assert_eq!(config.insecure_registries.clone().unwrap().len(), 1);
assert_eq!(&config.insecure_registries.clone().unwrap()[0], "local");
assert_eq!(config.node_labels.len(), 2);
assert_eq!(
config.node_labels.get("label21"),
Some(&("val21".to_owned()))
);
assert_eq!(&config.plugins_dir.to_string_lossy(), "/other/plugins");
}
#[test]
fn merging_respects_non_overridden_values() {
let base_values = builder_from_json_string(
r#"{
"listenerPort": 1234,
"listenerAddress": "172.182.192.1",
"hostname": "krusty-host",
"dataDir": "/krusty/data/dir",
"nodeIP": "173.183.193.2",
"nodeLabels": {
"label1": "val1",
"label2": "val2"
},
"nodeName": "krusty-node",
"allowLocalModules": true,
"insecureRegistries": ["local"],
"pluginsDir": "/some/plugins",
"tlsCertificateFile": "/my/secure/cert.pfx",
"tlsPrivateKeyFile": "/the/key"
}"#,
);
let override_values = builder_from_json_string(
r#"{
"listenerPort": 2345,
"nodeName": "krusterrific-node",
"tlsPrivateKeyFile": "/the/other/key"
}"#,
);
let config_builder = base_values.unwrap().with_override(override_values.unwrap());
let config = config_builder.build(fallbacks()).unwrap();
assert_eq!(config.server_config.port, 2345);
assert_eq!(format!("{}", config.server_config.addr), "172.182.192.1");
assert_eq!(
config.server_config.cert_file.to_string_lossy(),
"/my/secure/cert.pfx"
);
assert_eq!(
config.server_config.private_key_file.to_string_lossy(),
"/the/other/key"
);
assert_eq!(config.node_name, "krusterrific-node");
assert_eq!(config.hostname, "krusty-host");
assert_eq!(config.data_dir.to_string_lossy(), "/krusty/data/dir");
assert_eq!(format!("{}", config.node_ip), "173.183.193.2");
assert_eq!(config.allow_local_modules, true);
assert_eq!(config.insecure_registries.clone().unwrap().len(), 1);
assert_eq!(&config.insecure_registries.clone().unwrap()[0], "local");
assert_eq!(config.node_labels.len(), 2);
assert_eq!(config.node_labels.get("label1"), Some(&("val1".to_owned())));
assert_eq!(&config.plugins_dir.to_string_lossy(), "/some/plugins");
}
#[test]
fn malformed_config_file_is_reported() {
let config_builder = builder_from_json_string(
r#"{
"listenerPort": 2345,
"listenerAddress": "173.183.193.2",
"nodeName": "krustsome-node",
}"#,
);
let error =
config_builder.expect_err("Expected malformed config to produce error but was okay");
assert!(
error.to_string().contains("comma"),
"Expected malformed config descriptive error"
);
}
#[test]
fn malformed_config_value_is_reported() {
let config_builder = builder_from_json_string(
r#"{
"listenerPort": "qqqqqqqqqqq",
"listenerAddress": "173.183.193.2",
"nodeName": "krustsome-node"
}"#,
);
let error = config_builder
.unwrap()
.build(fallbacks())
.expect_err("Expected config error but was okay");
assert!(
error.to_string().contains("invalid type"),
"Expected 'invalid type' but got '{}'",
error.to_string()
);
}
#[test]
fn malformed_config_value_says_which_value() {
let config_builder = builder_from_json_string(
r#"{
"listenerPort": "qqqqqqqqqqq",
"listenerAddress": "173.183.193.2",
"nodeName": "krustsome-node"
}"#,
);
let error = config_builder
.unwrap()
.build(fallbacks())
.expect_err("Expected config error but was okay");
assert!(error.to_string().contains("server port"), "{:?}", error);
}
#[test]
fn out_of_range_config_value_is_reported() {
let config_builder = builder_from_json_string(
r#"{
"listenerPort": 8675309,
"listenerAddress": "173.183.193.2",
"nodeName": "krustsome-node"
}"#,
);
let error = config_builder
.unwrap()
.build(fallbacks())
.expect_err("Expected config error but was okay");
assert!(
error.to_string().contains("invalid value"),
"Expected 'invalid value' but got '{}'",
error.to_string()
);
}
#[test]
fn if_invalid_config_value_is_overridden_by_valid_one_it_is_not_an_error() {
let config_builder_1 = builder_from_json_string(
r#"{
"listenerPort": 8675309
}"#,
)
.unwrap();
let config_builder_2 = builder_from_json_string(
r#"{
"listenerPort": 1234
}"#,
)
.unwrap();
let config_builder = config_builder_1.with_override(config_builder_2);
let config = config_builder.build(fallbacks());
assert!(
config.is_ok(),
"Merged config had error {}",
config.unwrap_err()
);
assert_eq!(config.unwrap().server_config.port, 1234);
}
#[test]
fn if_invalid_config_value_is_not_overridden_it_is_still_an_error() {
let config_builder_1 = builder_from_json_string(
r#"{
"listenerPort": "qqqqqqqq"
}"#,
)
.unwrap();
let config_builder_2 = builder_from_json_string(
r#"{
"nodeName": "krustsome-node"