remove stupid cache and use proper watch on consul kv prefix
This commit is contained in:
parent
d906a6ebb5
commit
fb7fde4b09
6 changed files with 212 additions and 77 deletions
17
Cargo.lock
generated
17
Cargo.lock
generated
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@ -2,6 +2,15 @@
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# It is not intended for manual editing.
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version = 3
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[[package]]
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name = "aho-corasick"
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version = "0.7.20"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "cc936419f96fa211c1b9166887b38e5e40b19958e5b895be7c1f93adec7071ac"
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dependencies = [
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"memchr",
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]
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[[package]]
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name = "ansi_term"
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version = "0.12.1"
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@ -104,6 +113,7 @@ dependencies = [
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"async-trait",
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"df-consul",
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"futures",
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"regex",
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"reqwest",
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"serde",
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"serde_json",
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@ -115,11 +125,12 @@ dependencies = [
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[[package]]
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name = "df-consul"
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version = "0.3.3"
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version = "0.3.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "0e38cfbab431b53dfd2d09f2a9902510c636d3d7397645bac5cf1959cfde2999"
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checksum = "565fcd7efcbdc3e3420e70bc38187a8dd6d5f22759858c32e6af14329bf27ff3"
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dependencies = [
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"anyhow",
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"base64",
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"bytes",
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"futures",
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"log",
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@ -548,6 +559,8 @@ version = "1.7.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e076559ef8e241f2ae3479e36f97bd5741c0330689e217ad51ce2c76808b868a"
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dependencies = [
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"aho-corasick",
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"memchr",
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"regex-syntax",
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]
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44
Cargo.nix
44
Cargo.nix
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@ -23,7 +23,7 @@ args@{
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ignoreLockHash,
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}:
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let
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nixifiedLockHash = "f8fd87706eb1709f2cf3a695f4400e1a5e130e3c599cdfebc00bba51c80f494f";
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nixifiedLockHash = "d1a9c3cd406d87d45242e62c6697855d0e5e3c787d92d2fcd084b41469659da1";
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workspaceSrc = if args.workspaceSrc == null then ./. else args.workspaceSrc;
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currentLockHash = builtins.hashFile "sha256" (workspaceSrc + /Cargo.lock);
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lockHashIgnored = if ignoreLockHash
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@ -47,6 +47,20 @@ in
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workspace = {
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d53 = rustPackages.unknown.d53."0.1.0";
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};
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"registry+https://github.com/rust-lang/crates.io-index".aho-corasick."0.7.20" = overridableMkRustCrate (profileName: rec {
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name = "aho-corasick";
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version = "0.7.20";
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registry = "registry+https://github.com/rust-lang/crates.io-index";
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src = fetchCratesIo { inherit name version; sha256 = "cc936419f96fa211c1b9166887b38e5e40b19958e5b895be7c1f93adec7071ac"; };
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features = builtins.concatLists [
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[ "default" ]
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[ "std" ]
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];
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dependencies = {
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memchr = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".memchr."2.5.0" { inherit profileName; }).out;
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};
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});
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"registry+https://github.com/rust-lang/crates.io-index".ansi_term."0.12.1" = overridableMkRustCrate (profileName: rec {
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name = "ansi_term";
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version = "0.12.1";
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@ -188,8 +202,9 @@ in
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dependencies = {
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anyhow = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".anyhow."1.0.66" { inherit profileName; }).out;
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async_trait = (buildRustPackages."registry+https://github.com/rust-lang/crates.io-index".async-trait."0.1.59" { profileName = "__noProfile"; }).out;
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df_consul = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".df-consul."0.3.3" { inherit profileName; }).out;
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df_consul = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".df-consul."0.3.4" { inherit profileName; }).out;
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futures = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures."0.3.25" { inherit profileName; }).out;
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regex = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".regex."1.7.0" { inherit profileName; }).out;
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reqwest = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".reqwest."0.11.13" { inherit profileName; }).out;
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serde = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".serde."1.0.149" { inherit profileName; }).out;
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serde_json = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".serde_json."1.0.89" { inherit profileName; }).out;
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@ -200,13 +215,14 @@ in
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};
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});
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"registry+https://github.com/rust-lang/crates.io-index".df-consul."0.3.3" = overridableMkRustCrate (profileName: rec {
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"registry+https://github.com/rust-lang/crates.io-index".df-consul."0.3.4" = overridableMkRustCrate (profileName: rec {
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name = "df-consul";
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version = "0.3.3";
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version = "0.3.4";
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registry = "registry+https://github.com/rust-lang/crates.io-index";
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src = fetchCratesIo { inherit name version; sha256 = "0e38cfbab431b53dfd2d09f2a9902510c636d3d7397645bac5cf1959cfde2999"; };
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src = fetchCratesIo { inherit name version; sha256 = "565fcd7efcbdc3e3420e70bc38187a8dd6d5f22759858c32e6af14329bf27ff3"; };
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dependencies = {
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anyhow = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".anyhow."1.0.66" { inherit profileName; }).out;
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base64 = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".base64."0.13.1" { inherit profileName; }).out;
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bytes = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".bytes."1.3.0" { inherit profileName; }).out;
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futures = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".futures."0.3.25" { inherit profileName; }).out;
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log = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".log."0.4.17" { inherit profileName; }).out;
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@ -810,9 +826,27 @@ in
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registry = "registry+https://github.com/rust-lang/crates.io-index";
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src = fetchCratesIo { inherit name version; sha256 = "e076559ef8e241f2ae3479e36f97bd5741c0330689e217ad51ce2c76808b868a"; };
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features = builtins.concatLists [
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[ "aho-corasick" ]
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[ "default" ]
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[ "memchr" ]
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[ "perf" ]
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[ "perf-cache" ]
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[ "perf-dfa" ]
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[ "perf-inline" ]
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[ "perf-literal" ]
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[ "std" ]
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[ "unicode" ]
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[ "unicode-age" ]
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[ "unicode-bool" ]
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[ "unicode-case" ]
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[ "unicode-gencat" ]
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[ "unicode-perl" ]
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[ "unicode-script" ]
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[ "unicode-segment" ]
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];
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dependencies = {
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aho_corasick = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".aho-corasick."0.7.20" { inherit profileName; }).out;
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memchr = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".memchr."2.5.0" { inherit profileName; }).out;
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regex_syntax = (rustPackages."registry+https://github.com/rust-lang/crates.io-index".regex-syntax."0.6.28" { inherit profileName; }).out;
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};
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});
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@ -15,7 +15,8 @@ tracing-subscriber = { version = "0.3", features = ["env-filter"] }
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structopt = "0.3"
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tokio = { version = "1.22", default-features = false, features = ["rt", "rt-multi-thread", "io-util", "net", "time", "macros", "sync", "signal", "fs"] }
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reqwest = { version = "0.11", default-features = false, features = ["json", "rustls-tls-webpki-roots" ] }
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regex = "1"
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serde = { version = "1.0.107", features = ["derive"] }
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serde_json = "1.0"
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df-consul = "0.3.3"
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df-consul = "0.3.4"
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110
src/autodiscovery.rs
Normal file
110
src/autodiscovery.rs
Normal file
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@ -0,0 +1,110 @@
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//! Fetch autodiscoverd IP addresses stored by Diplonat into Consul
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use std::collections::HashMap;
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use std::net::{Ipv4Addr, Ipv6Addr};
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use std::sync::Arc;
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use std::time::{Duration, SystemTime};
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use anyhow::{anyhow, bail, Result};
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use regex::Regex;
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use serde::{Deserialize, Serialize};
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use tokio::{select, sync::watch};
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use tracing::*;
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use df_consul::*;
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#[derive(Serialize, Deserialize, Debug)]
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pub struct DiplonatAutodiscoveryResult<A> {
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pub timestamp: u64,
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pub address: Option<A>,
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}
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#[derive(Default, Debug)]
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pub struct AutodiscoveredAddresses {
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pub ipv4: HashMap<String, DiplonatAutodiscoveryResult<Ipv4Addr>>,
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pub ipv6: HashMap<String, DiplonatAutodiscoveryResult<Ipv6Addr>>,
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}
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pub fn watch_autodiscovered_ips(
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consul: Consul,
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mut must_exit: watch::Receiver<bool>,
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) -> watch::Receiver<Arc<AutodiscoveredAddresses>> {
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let (tx, rx) = watch::channel(Arc::new(AutodiscoveredAddresses::default()));
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tokio::spawn(async move {
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let mut last_index = None;
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let re = Regex::new(r".*autodiscovery/(\w+)/(\w+)$").unwrap();
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while !*must_exit.borrow() {
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let r = select! {
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_ = must_exit.changed() => continue,
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r = consul.kv_get_prefix("diplonat/autodiscovery/", last_index) => r,
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};
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let entries = match r {
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Err(e) => {
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warn!("Error fetching diplonat autodiscovery consul prefix: {}", e);
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tokio::time::sleep(Duration::from_secs(30)).await;
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continue;
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}
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Ok(r) => {
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last_index = Some(r.index());
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r.into_inner()
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}
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};
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let mut addresses = AutodiscoveredAddresses::default();
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for (k, v) in entries {
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if let Err(e) = parse_autodiscovered_address(&re, &mut addresses, &k, &v) {
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warn!(
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"Invalid k/v pair in diplonat autodiscovery results: {} = {} ({})",
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k,
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std::str::from_utf8(&v).unwrap_or("<???>"),
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e
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);
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}
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}
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if tx.send(Arc::new(addresses)).is_err() {
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info!("Autodiscovered addresses watcher terminating");
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}
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}
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});
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rx
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}
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fn parse_autodiscovered_address(
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re: &Regex,
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addresses: &mut AutodiscoveredAddresses,
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k: &str,
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v: &[u8],
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) -> Result<()> {
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let caps = re.captures(k).ok_or(anyhow!("key does not match regex"))?;
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if let (Some(family), Some(node)) = (caps.get(1), caps.get(2)) {
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match family.as_str() {
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"ipv4" => {
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let r: DiplonatAutodiscoveryResult<Ipv4Addr> = serde_json::from_slice(v)?;
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addresses.ipv4.insert(node.as_str().to_string(), r);
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}
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"ipv6" => {
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let r: DiplonatAutodiscoveryResult<Ipv6Addr> = serde_json::from_slice(v)?;
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addresses.ipv6.insert(node.as_str().to_string(), r);
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}
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_ => bail!("invalid address family {}", family.as_str()),
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}
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} else {
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bail!("invalid regex captures {:?}", caps);
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}
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Ok(())
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}
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pub fn timestamp() -> u64 {
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SystemTime::now()
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.duration_since(SystemTime::UNIX_EPOCH)
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.expect("clock error")
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.as_secs()
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}
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@ -2,7 +2,7 @@ use std::collections::{HashMap, HashSet};
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use std::fmt;
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use std::net::{Ipv4Addr, Ipv6Addr};
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use std::sync::Arc;
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use std::time::{Duration, SystemTime};
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use std::time::Duration;
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use anyhow::Result;
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use serde::{Deserialize, Serialize};
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@ -11,6 +11,8 @@ use tracing::*;
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use df_consul::*;
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use crate::autodiscovery::*;
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const IP_TARGET_METADATA_TAG_PREFIX: &str = "public_";
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const CNAME_TARGET_METADATA_TAG: &str = "cname_target";
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@ -66,29 +68,25 @@ pub fn spawn_dns_config_task(
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) -> watch::Receiver<Arc<DnsConfig>> {
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let (tx, rx) = watch::channel(Arc::new(DnsConfig::new()));
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let fetcher = DnsConfigFetcher {
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consul,
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node_ipv4_cache: HashMap::new(),
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node_ipv6_cache: HashMap::new(),
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};
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let fetcher = DnsConfigTask { consul };
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tokio::spawn(fetcher.task(tx, must_exit));
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rx
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}
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struct DnsConfigFetcher {
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struct DnsConfigTask {
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consul: Consul,
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node_ipv4_cache: HashMap<String, (u64, Option<Ipv4Addr>)>,
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node_ipv6_cache: HashMap<String, (u64, Option<Ipv6Addr>)>,
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}
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impl DnsConfigFetcher {
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impl DnsConfigTask {
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async fn task(
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mut self,
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tx: watch::Sender<Arc<DnsConfig>>,
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mut must_exit: watch::Receiver<bool>,
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) {
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let mut autodiscovery_rx = watch_autodiscovered_ips(self.consul.clone(), must_exit.clone());
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let mut catalog_rx = self
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.consul
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.watch_all_service_health(Duration::from_secs(60));
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|
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@ -96,11 +94,13 @@ impl DnsConfigFetcher {
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while !*must_exit.borrow() {
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select! {
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_ = catalog_rx.changed() => (),
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_ = autodiscovery_rx.changed() => (),
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_ = must_exit.changed() => continue,
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};
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let services = catalog_rx.borrow_and_update().clone();
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match self.parse_catalog(&services).await {
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let autodiscovery = autodiscovery_rx.borrow_and_update().clone();
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match self.parse_catalog(&services, &autodiscovery) {
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Ok(dns_config) => tx.send(Arc::new(dns_config)).expect("Internal error"),
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Err(e) => {
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error!("Error when parsing tags: {}", e);
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@ -109,7 +109,11 @@ impl DnsConfigFetcher {
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}
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}
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async fn parse_catalog(&mut self, services: &catalog::AllServiceHealth) -> Result<DnsConfig> {
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fn parse_catalog(
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&mut self,
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services: &catalog::AllServiceHealth,
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autodiscovery: &AutodiscoveredAddresses,
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) -> Result<DnsConfig> {
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let mut dns_config = DnsConfig::new();
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for (_svc, nodes) in services.iter() {
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for node in nodes.iter() {
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|
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@ -118,7 +122,7 @@ impl DnsConfigFetcher {
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continue;
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}
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for tag in node.service.tags.iter() {
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if let Some((k, v)) = self.parse_d53_tag(tag, &node.node).await? {
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if let Some((k, v)) = self.parse_d53_tag(tag, &node.node, autodiscovery)? {
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dns_config.add(k, v);
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}
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}
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@ -128,10 +132,11 @@ impl DnsConfigFetcher {
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Ok(dns_config)
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}
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async fn parse_d53_tag(
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fn parse_d53_tag(
|
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&mut self,
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tag: &str,
|
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node: &catalog::Node,
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autodiscovery: &AutodiscoveredAddresses,
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) -> Result<Option<(DnsEntryKey, DnsEntryValue)>> {
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let splits = tag.split(' ').collect::<Vec<_>>();
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if splits.len() != 2 {
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@ -139,14 +144,14 @@ impl DnsConfigFetcher {
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}
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let (record_type, target) = match splits[0] {
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"d53-a" => match self.get_node_ipv4(&node).await? {
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"d53-a" => match self.get_node_ipv4(&autodiscovery, &node)? {
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Some(tgt) => (DnsRecordType::A, tgt.to_string()),
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None => {
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warn!("Got d53-a tag `{}` but node {} does not appear to have a known public IPv4 address. Tag is ignored.", tag, node.node);
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return Ok(None);
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}
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},
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"d53-aaaa" => match self.get_node_ipv6(&node).await? {
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"d53-aaaa" => match self.get_node_ipv6(&autodiscovery, &node)? {
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Some(tgt) => (DnsRecordType::AAAA, tgt.to_string()),
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None => {
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warn!("Got d53-aaaa tag `{}` but node {} does not appear to have a known public IPv6 address. Tag is ignored.", tag, node.node);
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@ -174,77 +179,48 @@ impl DnsConfigFetcher {
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)))
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}
|
||||
|
||||
async fn get_node_ipv4(&mut self, node: &catalog::Node) -> Result<Option<Ipv4Addr>> {
|
||||
Self::get_node_ip(&self.consul, "ipv4", &mut self.node_ipv4_cache, node).await
|
||||
fn get_node_ipv4(
|
||||
&mut self,
|
||||
autodiscovery: &AutodiscoveredAddresses,
|
||||
node: &catalog::Node,
|
||||
) -> Result<Option<Ipv4Addr>> {
|
||||
Self::get_node_ip("ipv4", &autodiscovery.ipv4, node)
|
||||
}
|
||||
|
||||
async fn get_node_ipv6(&mut self, node: &catalog::Node) -> Result<Option<Ipv6Addr>> {
|
||||
Self::get_node_ip(&self.consul, "ipv6", &mut self.node_ipv6_cache, node).await
|
||||
fn get_node_ipv6(
|
||||
&mut self,
|
||||
autodiscovery: &AutodiscoveredAddresses,
|
||||
node: &catalog::Node,
|
||||
) -> Result<Option<Ipv6Addr>> {
|
||||
Self::get_node_ip("ipv6", &autodiscovery.ipv6, node)
|
||||
}
|
||||
|
||||
async fn get_node_ip<A>(
|
||||
consul: &Consul,
|
||||
family: &str,
|
||||
cache: &mut HashMap<String, (u64, Option<A>)>,
|
||||
fn get_node_ip<A>(
|
||||
family: &'static str,
|
||||
autodiscovery: &HashMap<String, DiplonatAutodiscoveryResult<A>>,
|
||||
node: &catalog::Node,
|
||||
) -> Result<Option<A>>
|
||||
where
|
||||
A: Serialize + for<'de> Deserialize<'de> + std::fmt::Debug + std::str::FromStr + Copy + Eq,
|
||||
<A as std::str::FromStr>::Err: Send + Sync + std::error::Error + 'static,
|
||||
{
|
||||
match cache.get(&node.node) {
|
||||
Some((t, a)) if timestamp() <= t + AUTODISCOVERY_CACHE_DURATION => Ok(*a),
|
||||
_ => {
|
||||
let kv_key = format!("diplonat/autodiscovery/{}/{}", family, node.node);
|
||||
let autodiscovery = consul.kv_get(&kv_key).await?;
|
||||
|
||||
if let Some(json) = autodiscovery {
|
||||
let a = serde_json::from_slice::<DiplonatAutodiscoveryResult<A>>(&json)?;
|
||||
if timestamp() <= a.timestamp + AUTODISCOVERY_CACHE_DURATION {
|
||||
if cache.get(&node.node).map(|x| x.1) != Some(a.address) {
|
||||
info!(
|
||||
"Got {} address for {} from diplonat autodiscovery: {:?}",
|
||||
family, node.node, a.address
|
||||
);
|
||||
}
|
||||
cache.insert(node.node.clone(), (a.timestamp, a.address));
|
||||
return Ok(a.address);
|
||||
} else {
|
||||
warn!("{} address for {} from diplonat autodiscovery is outdated (value: {:?}), falling back on value from Consul node meta", family, node.node, a.address);
|
||||
match autodiscovery.get(&node.node) {
|
||||
Some(ar) if timestamp() <= ar.timestamp + AUTODISCOVERY_CACHE_DURATION => {
|
||||
Ok(ar.address)
|
||||
}
|
||||
x => {
|
||||
if let Some(ar) = x {
|
||||
warn!("{} address for {} from diplonat autodiscovery is outdated (value: {:?}), falling back on value from Consul node meta", family, node.node, ar.address);
|
||||
}
|
||||
|
||||
let meta_tag = format!("{}{}", IP_TARGET_METADATA_TAG_PREFIX, family);
|
||||
let a = node.meta.get(&meta_tag).map(|x| x.parse()).transpose()?;
|
||||
|
||||
if cache.get(&node.node).map(|x| x.1) != Some(a) {
|
||||
info!(
|
||||
"Got {} address for {} from Consul node meta: {:?}",
|
||||
family, node.node, a
|
||||
);
|
||||
}
|
||||
cache.insert(node.node.clone(), (timestamp(), a));
|
||||
Ok(a)
|
||||
let addr = node.meta.get(&meta_tag).map(|x| x.parse()).transpose()?;
|
||||
Ok(addr)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// ---- util for interaction with diplonat ----
|
||||
|
||||
#[derive(Serialize, Deserialize, Debug)]
|
||||
pub struct DiplonatAutodiscoveryResult<A> {
|
||||
pub timestamp: u64,
|
||||
pub address: Option<A>,
|
||||
}
|
||||
|
||||
fn timestamp() -> u64 {
|
||||
SystemTime::now()
|
||||
.duration_since(SystemTime::UNIX_EPOCH)
|
||||
.expect("clock error")
|
||||
.as_secs()
|
||||
}
|
||||
|
||||
// ---- Display impls ----
|
||||
|
||||
impl std::fmt::Display for DnsRecordType {
|
||||
|
|
|
|||
|
|
@ -5,6 +5,7 @@ use tokio::select;
|
|||
use tokio::sync::watch;
|
||||
use tracing::*;
|
||||
|
||||
mod autodiscovery;
|
||||
mod dns_config;
|
||||
mod dns_updater;
|
||||
mod provider;
|
||||
|
|
|
|||
Loading…
Reference in a new issue