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layout: use separate CRDT for staged layout changes

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This commit is contained in:
Alex 2023-11-09 11:19:43 +01:00
parent 1da0a5676e
commit 523d2ecb95
Signed by untrusted user: lx
GPG key ID: 0E496D15096376BE
12 changed files with 175 additions and 183 deletions
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2
src/api/admin/api_server.rs
View file

@ -279,7 +279,7 @@ impl ApiHandler for AdminApiServer {
Endpoint::GetClusterLayout => handle_get_cluster_layout(&self.garage).await, Endpoint::GetClusterLayout => handle_get_cluster_layout(&self.garage).await,
Endpoint::UpdateClusterLayout => handle_update_cluster_layout(&self.garage, req).await, Endpoint::UpdateClusterLayout => handle_update_cluster_layout(&self.garage, req).await,
Endpoint::ApplyClusterLayout => handle_apply_cluster_layout(&self.garage, req).await, Endpoint::ApplyClusterLayout => handle_apply_cluster_layout(&self.garage, req).await,
Endpoint::RevertClusterLayout => handle_revert_cluster_layout(&self.garage, req).await, Endpoint::RevertClusterLayout => handle_revert_cluster_layout(&self.garage).await,
// Keys // Keys
Endpoint::ListKeys => handle_list_keys(&self.garage).await, Endpoint::ListKeys => handle_list_keys(&self.garage).await,
Endpoint::GetKeyInfo { Endpoint::GetKeyInfo {

23
src/api/admin/cluster.rs
View file

@ -105,7 +105,9 @@ fn format_cluster_layout(layout: &layout::LayoutHistory) -> GetClusterLayoutResp
.collect::<Vec<_>>(); .collect::<Vec<_>>();
let staged_role_changes = layout let staged_role_changes = layout
.staging_roles .staging
.get()
.roles
.items() .items()
.iter() .iter()
.filter(|(k, _, v)| layout.current().roles.get(k) != Some(v)) .filter(|(k, _, v)| layout.current().roles.get(k) != Some(v))
@ -211,7 +213,7 @@ pub async fn handle_update_cluster_layout(
let mut layout = garage.system.cluster_layout().as_ref().clone(); let mut layout = garage.system.cluster_layout().as_ref().clone();
let mut roles = layout.current().roles.clone(); let mut roles = layout.current().roles.clone();
roles.merge(&layout.staging_roles); roles.merge(&layout.staging.get().roles);
for change in updates { for change in updates {
let node = hex::decode(&change.id).ok_or_bad_request("Invalid node identifier")?; let node = hex::decode(&change.id).ok_or_bad_request("Invalid node identifier")?;
@ -232,7 +234,9 @@ pub async fn handle_update_cluster_layout(
}; };
layout layout
.staging_roles .staging
.get_mut()
.roles
.merge(&roles.update_mutator(node, layout::NodeRoleV(new_role))); .merge(&roles.update_mutator(node, layout::NodeRoleV(new_role)));
} }
@ -246,7 +250,7 @@ pub async fn handle_apply_cluster_layout(
garage: &Arc<Garage>, garage: &Arc<Garage>,
req: Request<Body>, req: Request<Body>,
) -> Result<Response<Body>, Error> { ) -> Result<Response<Body>, Error> {
let param = parse_json_body::<ApplyRevertLayoutRequest>(req).await?; let param = parse_json_body::<ApplyLayoutRequest>(req).await?;
let layout = garage.system.cluster_layout().as_ref().clone(); let layout = garage.system.cluster_layout().as_ref().clone();
let (layout, msg) = layout.apply_staged_changes(Some(param.version))?; let (layout, msg) = layout.apply_staged_changes(Some(param.version))?;
@ -260,14 +264,9 @@ pub async fn handle_apply_cluster_layout(
Ok(json_ok_response(&res)?) Ok(json_ok_response(&res)?)
} }
pub async fn handle_revert_cluster_layout( pub async fn handle_revert_cluster_layout(garage: &Arc<Garage>) -> Result<Response<Body>, Error> {
garage: &Arc<Garage>,
req: Request<Body>,
) -> Result<Response<Body>, Error> {
let param = parse_json_body::<ApplyRevertLayoutRequest>(req).await?;
let layout = garage.system.cluster_layout().as_ref().clone(); let layout = garage.system.cluster_layout().as_ref().clone();
let layout = layout.revert_staged_changes(Some(param.version))?; let layout = layout.revert_staged_changes()?;
garage.system.update_cluster_layout(&layout).await?; garage.system.update_cluster_layout(&layout).await?;
let res = format_cluster_layout(&layout); let res = format_cluster_layout(&layout);
@ -280,7 +279,7 @@ type UpdateClusterLayoutRequest = Vec<NodeRoleChange>;
#[derive(Deserialize)] #[derive(Deserialize)]
#[serde(rename_all = "camelCase")] #[serde(rename_all = "camelCase")]
struct ApplyRevertLayoutRequest { struct ApplyLayoutRequest {
version: u64, version: u64,
} }

2
src/garage/cli/cmd.rs
View file

@ -85,7 +85,7 @@ pub async fn cmd_status(rpc_cli: &Endpoint<SystemRpc, ()>, rpc_host: NodeID) ->
)); ));
} }
_ => { _ => {
let new_role = match layout.staging_roles.get(&adv.id) { let new_role = match layout.staging.get().roles.get(&adv.id) {
Some(NodeRoleV(Some(_))) => "(pending)", Some(NodeRoleV(Some(_))) => "(pending)",
_ => "NO ROLE ASSIGNED", _ => "NO ROLE ASSIGNED",
}; };

47
src/garage/cli/layout.rs
View file

@ -65,7 +65,7 @@ pub async fn cmd_assign_role(
.collect::<Result<Vec<_>, _>>()?; .collect::<Result<Vec<_>, _>>()?;
let mut roles = layout.current().roles.clone(); let mut roles = layout.current().roles.clone();
roles.merge(&layout.staging_roles); roles.merge(&layout.staging.get().roles);
for replaced in args.replace.iter() { for replaced in args.replace.iter() {
let replaced_node = let replaced_node =
@ -73,7 +73,9 @@ pub async fn cmd_assign_role(
match roles.get(&replaced_node) { match roles.get(&replaced_node) {
Some(NodeRoleV(Some(_))) => { Some(NodeRoleV(Some(_))) => {
layout layout
.staging_roles .staging
.get_mut()
.roles
.merge(&roles.update_mutator(replaced_node, NodeRoleV(None))); .merge(&roles.update_mutator(replaced_node, NodeRoleV(None)));
} }
_ => { _ => {
@ -131,7 +133,9 @@ pub async fn cmd_assign_role(
}; };
layout layout
.staging_roles .staging
.get_mut()
.roles
.merge(&roles.update_mutator(added_node, NodeRoleV(Some(new_entry)))); .merge(&roles.update_mutator(added_node, NodeRoleV(Some(new_entry))));
} }
@ -151,13 +155,15 @@ pub async fn cmd_remove_role(
let mut layout = fetch_layout(rpc_cli, rpc_host).await?; let mut layout = fetch_layout(rpc_cli, rpc_host).await?;
let mut roles = layout.current().roles.clone(); let mut roles = layout.current().roles.clone();
roles.merge(&layout.staging_roles); roles.merge(&layout.staging.get().roles);
let deleted_node = let deleted_node =
find_matching_node(roles.items().iter().map(|(id, _, _)| *id), &args.node_id)?; find_matching_node(roles.items().iter().map(|(id, _, _)| *id), &args.node_id)?;
layout layout
.staging_roles .staging
.get_mut()
.roles
.merge(&roles.update_mutator(deleted_node, NodeRoleV(None))); .merge(&roles.update_mutator(deleted_node, NodeRoleV(None)));
send_layout(rpc_cli, rpc_host, layout).await?; send_layout(rpc_cli, rpc_host, layout).await?;
@ -203,16 +209,12 @@ pub async fn cmd_show_layout(
println!(); println!();
println!(" garage layout apply --version {}", v + 1); println!(" garage layout apply --version {}", v + 1);
println!(); println!();
println!( println!("You can also revert all proposed changes with: garage layout revert");
"You can also revert all proposed changes with: garage layout revert --version {}",
v + 1)
} }
Err(e) => { Err(e) => {
println!("Error while trying to compute the assignment: {}", e); println!("Error while trying to compute the assignment: {}", e);
println!("This new layout cannot yet be applied."); println!("This new layout cannot yet be applied.");
println!( println!("You can also revert all proposed changes with: garage layout revert");
"You can also revert all proposed changes with: garage layout revert --version {}",
v + 1)
} }
} }
} }
@ -245,9 +247,15 @@ pub async fn cmd_revert_layout(
rpc_host: NodeID, rpc_host: NodeID,
revert_opt: RevertLayoutOpt, revert_opt: RevertLayoutOpt,
) -> Result<(), Error> { ) -> Result<(), Error> {
if !revert_opt.yes {
return Err(Error::Message(
"Please add the --yes flag to run the layout revert operation".into(),
));
}
let layout = fetch_layout(rpc_cli, rpc_host).await?; let layout = fetch_layout(rpc_cli, rpc_host).await?;
let layout = layout.revert_staged_changes(revert_opt.version)?; let layout = layout.revert_staged_changes()?;
send_layout(rpc_cli, rpc_host, layout).await?; send_layout(rpc_cli, rpc_host, layout).await?;
@ -284,7 +292,9 @@ pub async fn cmd_config_layout(
} }
layout layout
.staging_parameters .staging
.get_mut()
.parameters
.update(LayoutParameters { zone_redundancy: r }); .update(LayoutParameters { zone_redundancy: r });
println!("The zone redundancy parameter has been set to '{}'.", r); println!("The zone redundancy parameter has been set to '{}'.", r);
did_something = true; did_something = true;
@ -371,19 +381,20 @@ pub fn print_cluster_layout(layout: &LayoutVersion, empty_msg: &str) {
} }
pub fn print_staging_role_changes(layout: &LayoutHistory) -> bool { pub fn print_staging_role_changes(layout: &LayoutHistory) -> bool {
let has_role_changes = layout let staging = layout.staging.get();
.staging_roles let has_role_changes = staging
.roles
.items() .items()
.iter() .iter()
.any(|(k, _, v)| layout.current().roles.get(k) != Some(v)); .any(|(k, _, v)| layout.current().roles.get(k) != Some(v));
let has_layout_changes = *layout.staging_parameters.get() != layout.current().parameters; let has_layout_changes = *staging.parameters.get() != layout.current().parameters;
if has_role_changes || has_layout_changes { if has_role_changes || has_layout_changes {
println!(); println!();
println!("==== STAGED ROLE CHANGES ===="); println!("==== STAGED ROLE CHANGES ====");
if has_role_changes { if has_role_changes {
let mut table = vec!["ID\tTags\tZone\tCapacity".to_string()]; let mut table = vec!["ID\tTags\tZone\tCapacity".to_string()];
for (id, _, role) in layout.staging_roles.items().iter() { for (id, _, role) in staging.roles.items().iter() {
if layout.current().roles.get(id) == Some(role) { if layout.current().roles.get(id) == Some(role) {
continue; continue;
} }
@ -406,7 +417,7 @@ pub fn print_staging_role_changes(layout: &LayoutHistory) -> bool {
if has_layout_changes { if has_layout_changes {
println!( println!(
"Zone redundancy: {}", "Zone redundancy: {}",
layout.staging_parameters.get().zone_redundancy staging.parameters.get().zone_redundancy
); );
} }
true true

6
src/garage/cli/structs.rs
View file

@ -164,9 +164,9 @@ pub struct ApplyLayoutOpt {
#[derive(StructOpt, Debug)] #[derive(StructOpt, Debug)]
pub struct RevertLayoutOpt { pub struct RevertLayoutOpt {
/// Version number of old configuration to which to revert /// The revert operation will not be ran unless this flag is added
#[structopt(long = "version")] #[structopt(long = "yes")]
pub(crate) version: Option<u64>, pub(crate) yes: bool,
} }
#[derive(Serialize, Deserialize, StructOpt, Debug)] #[derive(Serialize, Deserialize, StructOpt, Debug)]

10
src/rpc/graph_algo.rs → src/rpc/layout/graph_algo.rs
View file

@ -114,16 +114,6 @@ impl Graph<FlowEdge> {
Ok(result) Ok(result)
} }
/// This function returns the value of the flow incoming to v.
pub fn get_inflow(&self, v: Vertex) -> Result<i64, String> {
let idv = self.get_vertex_id(&v)?;
let mut result = 0;
for edge in self.graph[idv].iter() {
result += max(0, self.graph[edge.dest][edge.rev].flow);
}
Ok(result)
}
/// This function returns the value of the flow outgoing from v. /// This function returns the value of the flow outgoing from v.
pub fn get_outflow(&self, v: Vertex) -> Result<i64, String> { pub fn get_outflow(&self, v: Vertex) -> Result<i64, String> {
let idv = self.get_vertex_id(&v)?; let idv = self.get_vertex_id(&v)?;

80
src/rpc/layout/history.rs
View file

@ -1,5 +1,3 @@
use std::cmp::Ordering;
use garage_util::crdt::{Crdt, Lww, LwwMap}; use garage_util::crdt::{Crdt, Lww, LwwMap};
use garage_util::data::*; use garage_util::data::*;
use garage_util::encode::nonversioned_encode; use garage_util::encode::nonversioned_encode;
@ -12,14 +10,15 @@ impl LayoutHistory {
pub fn new(replication_factor: usize) -> Self { pub fn new(replication_factor: usize) -> Self {
let version = LayoutVersion::new(replication_factor); let version = LayoutVersion::new(replication_factor);
let staging_parameters = Lww::<LayoutParameters>::new(version.parameters); let staging = LayoutStaging {
let empty_lwwmap = LwwMap::new(); parameters: Lww::<LayoutParameters>::new(version.parameters),
roles: LwwMap::new(),
};
let mut ret = LayoutHistory { let mut ret = LayoutHistory {
versions: vec![version].into_boxed_slice().into(), versions: vec![version].into_boxed_slice().into(),
update_trackers: Default::default(), update_trackers: Default::default(),
staging_parameters, staging: Lww::raw(0, staging),
staging_roles: empty_lwwmap,
staging_hash: [0u8; 32].into(), staging_hash: [0u8; 32].into(),
}; };
ret.staging_hash = ret.calculate_staging_hash(); ret.staging_hash = ret.calculate_staging_hash();
@ -31,8 +30,7 @@ impl LayoutHistory {
} }
pub(crate) fn calculate_staging_hash(&self) -> Hash { pub(crate) fn calculate_staging_hash(&self) -> Hash {
let hashed_tuple = (&self.staging_roles, &self.staging_parameters); blake2sum(&nonversioned_encode(&self.staging).unwrap()[..])
blake2sum(&nonversioned_encode(&hashed_tuple).unwrap()[..])
} }
// ================== updates to layout, public interface =================== // ================== updates to layout, public interface ===================
@ -41,26 +39,10 @@ impl LayoutHistory {
let mut changed = false; let mut changed = false;
// Merge staged layout changes // Merge staged layout changes
match other.current().version.cmp(&self.current().version) { if self.staging != other.staging {
Ordering::Greater => {
self.staging_parameters = other.staging_parameters.clone();
self.staging_roles = other.staging_roles.clone();
self.staging_hash = other.staging_hash;
changed = true; changed = true;
} }
Ordering::Equal => { self.staging.merge(&other.staging);
self.staging_parameters.merge(&other.staging_parameters);
self.staging_roles.merge(&other.staging_roles);
let new_staging_hash = self.calculate_staging_hash();
if new_staging_hash != self.staging_hash {
changed = true;
}
self.staging_hash = new_staging_hash;
}
Ordering::Less => (),
}
// Add any new versions to history // Add any new versions to history
for v2 in other.versions.iter() { for v2 in other.versions.iter() {
@ -102,50 +84,34 @@ To know the correct value of the new layout version, invoke `garage layout show`
} }
} }
// Compute new version and add it to history
let mut new_version = self.current().clone(); let mut new_version = self.current().clone();
new_version.version += 1; new_version.version += 1;
new_version.roles.merge(&self.staging_roles); new_version.roles.merge(&self.staging.get().roles);
new_version.roles.retain(|(_, _, v)| v.0.is_some()); new_version.roles.retain(|(_, _, v)| v.0.is_some());
new_version.parameters = *self.staging_parameters.get(); new_version.parameters = *self.staging.get().parameters.get();
self.staging_roles.clear();
self.staging_hash = self.calculate_staging_hash();
let msg = new_version.calculate_partition_assignment()?; let msg = new_version.calculate_partition_assignment()?;
self.versions.push(new_version); self.versions.push(new_version);
// Reset the staged layout changes
self.staging.update(LayoutStaging {
parameters: self.staging.get().parameters.clone(),
roles: LwwMap::new(),
});
self.staging_hash = self.calculate_staging_hash();
Ok((self, msg)) Ok((self, msg))
} }
pub fn revert_staged_changes(mut self, version: Option<u64>) -> Result<Self, Error> { pub fn revert_staged_changes(mut self) -> Result<Self, Error> {
match version { self.staging.update(LayoutStaging {
None => { parameters: Lww::new(self.current().parameters.clone()),
let error = r#" roles: LwwMap::new(),
Please pass the new layout version number to ensure that you are writing the correct version of the cluster layout. });
To know the correct value of the new layout version, invoke `garage layout show` and review the proposed changes.
"#;
return Err(Error::Message(error.into()));
}
Some(v) => {
if v != self.current().version + 1 {
return Err(Error::Message("Invalid new layout version".into()));
}
}
}
self.staging_roles.clear();
self.staging_parameters.update(self.current().parameters);
self.staging_hash = self.calculate_staging_hash(); self.staging_hash = self.calculate_staging_hash();
// TODO this is stupid, we should have a separate version counter/LWW
// for the staging params
let mut new_version = self.current().clone();
new_version.version += 1;
self.versions.push(new_version);
Ok(self) Ok(self)
} }

4
src/rpc/layout/mod.rs
View file

@ -1,8 +1,10 @@
mod graph_algo;
mod history; mod history;
mod schema; mod schema;
mod tracker;
mod version; mod version;
// ---- re-exports ----
pub use history::*; pub use history::*;
pub use schema::*; pub use schema::*;
pub use version::*; pub use version::*;

106
src/rpc/layout/schema.rs
View file

@ -1,3 +1,9 @@
use std::fmt;
use bytesize::ByteSize;
use garage_util::crdt::{AutoCrdt, Crdt};
mod v08 { mod v08 {
use crate::layout::CompactNodeType; use crate::layout::CompactNodeType;
use garage_util::crdt::LwwMap; use garage_util::crdt::LwwMap;
@ -210,6 +216,15 @@ mod v010 {
pub ring_assignment_data: Vec<CompactNodeType>, pub ring_assignment_data: Vec<CompactNodeType>,
} }
/// The staged changes for the next layout version
#[derive(Clone, Debug, Serialize, Deserialize, PartialEq)]
pub struct LayoutStaging {
/// Parameters to be used in the next partition assignment computation.
pub parameters: Lww<LayoutParameters>,
/// Role changes which are staged for the next version of the layout
pub roles: LwwMap<Uuid, NodeRoleV>,
}
/// The history of cluster layouts /// The history of cluster layouts
#[derive(Clone, Debug, Serialize, Deserialize)] #[derive(Clone, Debug, Serialize, Deserialize)]
pub struct LayoutHistory { pub struct LayoutHistory {
@ -219,10 +234,8 @@ mod v010 {
/// Update trackers /// Update trackers
pub update_trackers: UpdateTrackers, pub update_trackers: UpdateTrackers,
/// Parameters to be used in the next partition assignment computation. /// Staged changes for the next version
pub staging_parameters: Lww<LayoutParameters>, pub staging: Lww<LayoutStaging>,
/// Role changes which are staged for the next version of the layout
pub staging_roles: LwwMap<Uuid, NodeRoleV>,
/// Hash of the serialized staging_parameters + staging_roles /// Hash of the serialized staging_parameters + staging_roles
pub staging_hash: Hash, pub staging_hash: Hash,
} }
@ -265,6 +278,10 @@ mod v010 {
.map(|x| (*x, version.version)) .map(|x| (*x, version.version))
.collect::<HashMap<Uuid, u64>>(), .collect::<HashMap<Uuid, u64>>(),
); );
let staging = LayoutStaging {
parameters: previous.staging_parameters,
roles: previous.staging_roles,
};
let mut ret = Self { let mut ret = Self {
versions: vec![version], versions: vec![version],
update_trackers: UpdateTrackers { update_trackers: UpdateTrackers {
@ -272,8 +289,7 @@ mod v010 {
sync_map: update_tracker.clone(), sync_map: update_tracker.clone(),
sync_ack_map: update_tracker.clone(), sync_ack_map: update_tracker.clone(),
}, },
staging_parameters: previous.staging_parameters, staging: Lww::raw(previous.version, staging),
staging_roles: previous.staging_roles,
staging_hash: [0u8; 32].into(), staging_hash: [0u8; 32].into(),
}; };
ret.staging_hash = ret.calculate_staging_hash(); ret.staging_hash = ret.calculate_staging_hash();
@ -283,3 +299,81 @@ mod v010 {
} }
pub use v010::*; pub use v010::*;
// ---- utility functions ----
impl AutoCrdt for LayoutParameters {
const WARN_IF_DIFFERENT: bool = true;
}
impl AutoCrdt for NodeRoleV {
const WARN_IF_DIFFERENT: bool = true;
}
impl Crdt for LayoutStaging {
fn merge(&mut self, other: &LayoutStaging) {
self.parameters.merge(&other.parameters);
self.roles.merge(&other.roles);
}
}
impl NodeRole {
pub fn capacity_string(&self) -> String {
match self.capacity {
Some(c) => ByteSize::b(c).to_string_as(false),
None => "gateway".to_string(),
}
}
pub fn tags_string(&self) -> String {
self.tags.join(",")
}
}
impl fmt::Display for ZoneRedundancy {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
ZoneRedundancy::Maximum => write!(f, "maximum"),
ZoneRedundancy::AtLeast(x) => write!(f, "{}", x),
}
}
}
impl core::str::FromStr for ZoneRedundancy {
type Err = &'static str;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"none" | "max" | "maximum" => Ok(ZoneRedundancy::Maximum),
x => {
let v = x
.parse::<usize>()
.map_err(|_| "zone redundancy must be 'none'/'max' or an integer")?;
Ok(ZoneRedundancy::AtLeast(v))
}
}
}
}
impl UpdateTracker {
fn merge(&mut self, other: &UpdateTracker) {
for (k, v) in other.0.iter() {
if let Some(v_mut) = self.0.get_mut(k) {
*v_mut = std::cmp::max(*v_mut, *v);
} else {
self.0.insert(*k, *v);
}
}
}
pub(crate) fn min(&self) -> u64 {
self.0.iter().map(|(_, v)| *v).min().unwrap_or(0)
}
}
impl UpdateTrackers {
pub(crate) fn merge(&mut self, other: &UpdateTrackers) {
self.ack_map.merge(&other.ack_map);
self.sync_map.merge(&other.sync_map);
self.sync_ack_map.merge(&other.sync_ack_map);
}
}

21
src/rpc/layout/tracker.rs
View file

@ -1,21 +0,0 @@
use super::*;
impl UpdateTracker {
fn merge(&mut self, other: &UpdateTracker) {
for (k, v) in other.0.iter() {
if let Some(v_mut) = self.0.get_mut(k) {
*v_mut = std::cmp::max(*v_mut, *v);
} else {
self.0.insert(*k, *v);
}
}
}
}
impl UpdateTrackers {
pub(crate) fn merge(&mut self, other: &UpdateTrackers) {
self.ack_map.merge(&other.ack_map);
self.sync_map.merge(&other.sync_map);
self.sync_ack_map.merge(&other.sync_ack_map);
}
}

54
src/rpc/layout/version.rs
View file

@ -1,69 +1,21 @@
use std::collections::HashMap; use std::collections::HashMap;
use std::collections::HashSet; use std::collections::HashSet;
use std::fmt; use std::convert::TryInto;
use bytesize::ByteSize; use bytesize::ByteSize;
use itertools::Itertools; use itertools::Itertools;
use garage_util::crdt::{AutoCrdt, LwwMap}; use garage_util::crdt::LwwMap;
use garage_util::data::*; use garage_util::data::*;
use garage_util::error::*; use garage_util::error::*;
use crate::graph_algo::*; use super::graph_algo::*;
use std::convert::TryInto;
use super::schema::*; use super::schema::*;
use super::*; use super::*;
// The Message type will be used to collect information on the algorithm. // The Message type will be used to collect information on the algorithm.
pub type Message = Vec<String>; pub type Message = Vec<String>;
impl AutoCrdt for LayoutParameters {
const WARN_IF_DIFFERENT: bool = true;
}
impl AutoCrdt for NodeRoleV {
const WARN_IF_DIFFERENT: bool = true;
}
impl NodeRole {
pub fn capacity_string(&self) -> String {
match self.capacity {
Some(c) => ByteSize::b(c).to_string_as(false),
None => "gateway".to_string(),
}
}
pub fn tags_string(&self) -> String {
self.tags.join(",")
}
}
impl fmt::Display for ZoneRedundancy {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
ZoneRedundancy::Maximum => write!(f, "maximum"),
ZoneRedundancy::AtLeast(x) => write!(f, "{}", x),
}
}
}
impl core::str::FromStr for ZoneRedundancy {
type Err = &'static str;
fn from_str(s: &str) -> Result<Self, Self::Err> {
match s {
"none" | "max" | "maximum" => Ok(ZoneRedundancy::Maximum),
x => {
let v = x
.parse::<usize>()
.map_err(|_| "zone redundancy must be 'none'/'max' or an integer")?;
Ok(ZoneRedundancy::AtLeast(v))
}
}
}
}
impl LayoutVersion { impl LayoutVersion {
pub fn new(replication_factor: usize) -> Self { pub fn new(replication_factor: usize) -> Self {
// We set the default zone redundancy to be Maximum, meaning that the maximum // We set the default zone redundancy to be Maximum, meaning that the maximum

1
src/rpc/lib.rs
View file

@ -11,7 +11,6 @@ mod consul;
#[cfg(feature = "kubernetes-discovery")] #[cfg(feature = "kubernetes-discovery")]
mod kubernetes; mod kubernetes;
pub mod graph_algo;
pub mod layout; pub mod layout;
pub mod replication_mode; pub mod replication_mode;
pub mod system; pub mod system;