Armael/restic-alarm
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tweaks & fmt

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This commit is contained in:
Armaël Guéneau 2024-04-08 00:12:32 +02:00
parent f65518dfb5
commit 08df74f005
1 changed files with 83 additions and 66 deletions
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131
src/main.rs
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@ -1,10 +1,10 @@
use std::collections::HashMap;
use std::time::{SystemTime,Duration};
use std::convert::TryFrom;
use serde::{Deserialize, Serialize};
use aws_config::Region;
use aws_sdk_s3 as s3;
use eyre::{WrapErr,OptionExt};
use eyre::{OptionExt, WrapErr};
use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use std::convert::TryFrom;
use std::time::{Duration, SystemTime};
const RESTIC_ALARM_BUCKET: &str = "restic-alarm-state";
const RESTIC_ALARM_STATE_FILE: &str = "state.toml";
@ -15,7 +15,7 @@ const S3_ENDPOINT: &str = "http://garage.isomorphis.me:3900";
#[derive(Serialize, Deserialize, Clone)]
struct State {
last_alert: HashMap<String, u64>
last_alert: HashMap<String, u64>,
}
impl State {
@ -26,13 +26,19 @@ impl State {
}
fn update_last_alert(&mut self, repo: &str) {
let time = SystemTime::now().duration_since(SystemTime::UNIX_EPOCH).unwrap();
let time = SystemTime::now()
.duration_since(SystemTime::UNIX_EPOCH)
.unwrap();
self.last_alert.insert(repo.to_owned(), time.as_secs());
}
}
fn default_alert_interval() -> u64 { 1 }
fn default_alert_duration() -> u64 { 7 }
fn default_alert_interval() -> u64 {
1
}
fn default_alert_duration() -> u64 {
7
}
#[derive(Serialize, Deserialize)]
struct RepoConfig {
@ -45,7 +51,11 @@ struct RepoConfig {
alert_duration: u64,
}
fn is_alert_needed(cfg: &RepoConfig, inactive_for: Duration, since_last_alert: Option<Duration>) -> bool {
fn is_alert_needed(
cfg: &RepoConfig,
inactive_for: Duration,
since_last_alert: Option<Duration>,
) -> bool {
let one_day: u64 = 3600 * 24;
inactive_for.as_secs() >= cfg.inactivity * one_day
&& inactive_for.as_secs() <= cfg.alert_duration * one_day
@ -56,63 +66,72 @@ fn is_alert_needed(cfg: &RepoConfig, inactive_for: Duration, since_last_alert: O
}
async fn send_email(email: &str, repo: &str, inactive: Duration) -> eyre::Result<()> {
use lettre::{Message, AsyncSendmailTransport, AsyncTransport};
use lettre::{AsyncSendmailTransport, AsyncTransport, Message};
let email = Message::builder()
.from("infracoll <infracoll>".parse().unwrap())
.to(email.parse()?)
.subject(format!("restic-alarm: inactive repository {}", repo))
.body(format!("Alert: Repository {} has been inactive for {} days.\n",
repo, inactive.as_secs() / (3600*24)))
.body(format!(
"Alert: Repository {} has been inactive for {} days.\n",
repo,
inactive.as_secs() / (3600 * 24)
))
.unwrap();
let mailer = AsyncSendmailTransport::new();
mailer.send(email).await?;
Ok(())
}
use s3::error::SdkError;
use s3::operation::get_object::GetObjectError;
fn is_no_such_key_error<R>(err: &SdkError<GetObjectError,R>) -> bool {
match err {
SdkError::ServiceError(e) => {
match e.err() {
GetObjectError::NoSuchKey(_) => true,
_ => false,
}
},
_ => false,
}
}
async fn write_state(client: &s3::Client, state: &State) -> eyre::Result<()> {
let data = toml::to_vec(state)?;
client.put_object()
client
.put_object()
.bucket(RESTIC_ALARM_BUCKET)
.key(RESTIC_ALARM_STATE_FILE)
.body(s3::primitives::ByteStream::from(data))
.send().await?;
.send()
.await?;
Ok(())
}
use s3::error::SdkError;
use s3::operation::get_object::GetObjectError;
fn is_no_such_key_error<R>(err: &SdkError<GetObjectError, R>) -> bool {
match err {
SdkError::ServiceError(e) => match e.err() {
GetObjectError::NoSuchKey(_) => true,
_ => false,
},
_ => false,
}
}
async fn read_state(client: &s3::Client) -> eyre::Result<State> {
let output = client
.get_object()
.bucket(RESTIC_ALARM_BUCKET)
.key(RESTIC_ALARM_STATE_FILE)
.send().await;
.send()
.await;
match output {
Ok(output) => {
let state_s = output.body.collect().await
let state_s = output
.body
.collect()
.await
.wrap_err("error reading state file")?
.into_bytes();
let state: State = toml::from_slice(&state_s).expect("invalid state file");
Ok(state)
},
}
Err(e) if is_no_such_key_error(&e) => {
let state = State { last_alert: HashMap::new() };
let state = State {
last_alert: HashMap::new(),
};
write_state(client, &state).await?;
Ok(state)
},
}
Err(err) => Err(err)?,
}
}
@ -123,7 +142,8 @@ async fn to_watch(client: &s3::Client) -> eyre::Result<Vec<String>> {
.list_objects_v2()
.bucket(RESTIC_ALARM_BUCKET)
.prefix(RESTIC_ALARM_WATCH_DIR)
.into_paginator().send();
.into_paginator()
.send();
while let Some(res) = objs_resp.next().await {
let output = res?;
for obj in output.contents() {
@ -140,8 +160,12 @@ async fn read_repo_config(client: &s3::Client, repo: &str) -> eyre::Result<RepoC
.get_object()
.bucket(RESTIC_ALARM_BUCKET)
.key(&repo_config_path)
.send().await?;
let config_s = output.body.collect().await
.send()
.await?;
let config_s = output
.body
.collect()
.await
.wrap_err_with(|| format!("reading repo config file {}", &repo_config_path))?
.into_bytes();
let config = toml::from_slice(&config_s)
@ -154,10 +178,11 @@ async fn repo_last_snapshot(client: &s3::Client, repo: &str) -> eyre::Result<Opt
.list_objects_v2()
.bucket(repo)
.prefix("snapshots/")
.into_paginator().send();
.into_paginator()
.send();
let mut modtimes = Vec::new();
while let Some(res) = objs.next().await {
let output = res?;
let output = res.wrap_err("listing repo snapshots")?;
for obj in output.contents() {
if let Some(last_mod) = obj.last_modified() {
modtimes.push(SystemTime::try_from(last_mod.clone()).unwrap());
@ -167,8 +192,7 @@ async fn repo_last_snapshot(client: &s3::Client, repo: &str) -> eyre::Result<Opt
modtimes.sort();
match modtimes.last() {
None => Ok(None),
Some(time) =>
Ok(SystemTime::now().duration_since(*time).ok())
Some(time) => Ok(SystemTime::now().duration_since(*time).ok()),
}
}
@ -176,21 +200,17 @@ async fn repo_last_snapshot(client: &s3::Client, repo: &str) -> eyre::Result<Opt
// (e.g. if it fails to parse).
// So the error must not be propagated to the toplevel, which would abort the
// alert for remaining repositories; it should instead just be reported/logged.
async fn check_repo(client: &s3::Client, state: &State, repo: &str) -> eyre::Result<State> {
async fn check_repo(client: &s3::Client, state: &mut State, repo: &str) -> eyre::Result<()> {
let config = read_repo_config(client, repo).await?;
let mut state = state.to_owned();
match repo_last_snapshot(client, repo).await? {
Some(last_snapshot) => {
let is_alert = is_alert_needed(&config, last_snapshot, state.last_alert(repo));
if is_alert {
if let Some(last_snapshot) = repo_last_snapshot(client, repo).await? {
if is_alert_needed(&config, last_snapshot, state.last_alert(repo)) {
println!("Sending alert to {} about bucket {}", config.email, repo);
send_email(&config.email, repo, last_snapshot).await?;
}
state.update_last_alert(repo)
},
None => (),
state.update_last_alert(repo);
write_state(client, state).await?;
}
Ok(state)
Ok(())
}
#[::tokio::main]
@ -206,11 +226,8 @@ async fn main() -> eyre::Result<()> {
let repos = to_watch(&client).await?;
let mut state = read_state(&client).await?;
for repo in repos {
match check_repo(&client, &state, &repo).await {
Ok(new_state) => {
state = new_state;
write_state(&client, &state).await?;
},
match check_repo(&client, &mut state, &repo).await {
Ok(()) => (),
Err(err) => {
// is this the best way to log the error?
eprintln!("Error: {:?}", err)