private async Task <ResourceControllerResult?> CheckService(V1Service entity)
{
if (entity.GetAnnotation(ServiceAnnotation) == null)
{
_logger.LogInformation($"Service {entity.Name()} has no wirepact annotation.");
return(null);
}
var targetPort = Convert.ToInt32(entity.GetAnnotation(DeploymentAnnotation));
if (entity.Spec.Ports.Any(p => p.Port == targetPort && p.TargetPort == "envoy"))
{
_logger.LogInformation($"Service {entity.Name()} has envoy target set.");
return(null);
}
var port = entity.Spec.Ports.FirstOrDefault(p => p.Port == targetPort);
if (port == null)
{
_logger.LogInformation($"Service {entity.Name()} has no port to the target.");
return(null);
}
port.TargetPort = "envoy";
_logger.LogInformation($"Update Service {entity.Name()}.");
await _client.Update(entity);
return(null);
}
public async Task RegisterFinalizerAsync <TFinalizer>(TEntity entity)
where TFinalizer : IResourceFinalizer <TEntity>
{
using var scope = _services.CreateScope();
var finalizer = scope.ServiceProvider.GetRequiredService <TFinalizer>();
_logger.LogTrace(
@"Try to add finalizer ""{finalizer}"" on entity ""{kind}/{name}"".",
finalizer.Identifier,
entity.Kind,
entity.Name());
if (entity.AddFinalizer(finalizer.Identifier))
{
_logger.LogInformation(
@"Added finalizer ""{finalizer}"" on entity ""{kind}/{name}"".",
finalizer.Identifier,
entity.Kind,
entity.Name());
}
await _client.Update(entity);
}
/// <summary>
/// Check the <see cref="V1Lease"/> object for the leader election.
/// </summary>
/// <returns>A Task.</returns>
internal async Task CheckLeaderLease()
{
if (_namespace.Length == 0)
{
_logger.LogTrace("Fetching namespace for leader election.");
_namespace = await _client.GetCurrentNamespace();
}
_logger.LogTrace(@"Fetch V1Lease object for operator ""{operator}"".", _settings.Name);
var lease = await _client.Get <V1Lease>(_leaseName, _namespace);
// If the lease does not exist, create it, set this instance as leader
// fire the appropriate event, return.
if (lease == null)
{
_logger.LogInformation(
@"There was no lease for operator ""{operator}"". Creating one and electing ""{hostname}"" as leader.",
_settings.Name,
_hostname);
try
{
await _client.Create(
new V1Lease(
$"{V1Lease.KubeGroup}/{V1Lease.KubeApiVersion}",
V1Lease.KubeKind,
new V1ObjectMeta(
name: _leaseName,
namespaceProperty: _namespace,
annotations: new Dictionary <string, string> {
{ "leader-elector", _settings.Name }
}),
new V1LeaseSpec(
DateTime.UtcNow,
_hostname,
_settings.LeaderElectionLeaseDuration,
0,
DateTime.UtcNow)));
_election.LeadershipChanged(LeaderState.Leader);
}
catch (HttpOperationException e) when(e.Response.StatusCode == HttpStatusCode.Conflict)
{
_logger.LogInformation("Another instance of the operator was faster. Falling back to candiate.");
_election.LeadershipChanged(LeaderState.Candidate);
}
catch (HttpOperationException ex)
{
_logger.LogCritical(
ex,
@"A http error happened during leader election check of instance ""{hostname}"" of operator ""{operator}"". Response Message: ""{response}""",
_hostname,
_settings.Name,
$"Phrase: {ex.Response.ReasonPhrase}\nContent: {ex.Response.Content}");
}
catch (Exception ex)
{
_logger.LogCritical(
ex,
@"A generic error happened during leader election check of instance ""{hostname}"" of operator ""{operator}"".",
_hostname,
_settings.Name);
}
return;
}
/*
* If the lease exists, check if this instance is the leader.
* If it is, update the renew time, and update the entity.
* If it isn't and the lease time is in the past,
* set the leader, update the entity, trigger event.
*/
if (lease.Spec.HolderIdentity == _hostname)
{
_logger.LogDebug(
@"The instance ""{hostname}"" is still the leader for operator ""{operator}"".",
_hostname,
_settings.Name);
lease.Spec.RenewTime = DateTime.UtcNow;
try
{
await _client.Update(lease);
_election.LeadershipChanged(LeaderState.Leader);
}
catch (HttpOperationException e) when(e.Response.StatusCode == HttpStatusCode.Conflict)
{
_logger.LogWarning("Another instance updated the lease. Retry on next cycle.");
}
catch (HttpOperationException ex)
{
_logger.LogCritical(
ex,
@"A http error happened during leader election check of instance ""{hostname}"" of operator ""{operator}"". Response Message: ""{response}""",
_hostname,
_settings.Name,
$"Phrase: {ex.Response.ReasonPhrase}\nContent: {ex.Response.Content}");
}
catch (Exception ex)
{
_logger.LogCritical(
ex,
@"A generic error happened during leader election check of instance ""{hostname}"" of operator ""{operator}"".",
_hostname,
_settings.Name);
}
return;
}
if (lease.Spec.RenewTime.HasValue &&
lease.Spec.RenewTime.Value +
TimeSpan.FromSeconds(lease.Spec.LeaseDurationSeconds ?? _settings.LeaderElectionLeaseDuration) <
DateTime.UtcNow)
{
_logger.LogInformation(
@"The lease for operator ""{operator}"" ran out. Electing ""{hostname}"" as leader.",
_settings.Name,
_hostname);
lease.Spec.AcquireTime = DateTime.UtcNow;
lease.Spec.RenewTime = DateTime.UtcNow;
lease.Spec.HolderIdentity = _hostname;
lease.Spec.LeaseTransitions ??= 0;
lease.Spec.LeaseTransitions += 1;
try
{
await _client.Update(lease);
_election.LeadershipChanged(LeaderState.Leader);
}
catch (HttpOperationException e) when(e.Response.StatusCode == HttpStatusCode.Conflict)
{
_logger.LogWarning("Another instance updated the lease. Retry on next cycle.");
}
catch (HttpOperationException ex)
{
_logger.LogCritical(
ex,
@"A http error happened during leader election check of instance ""{hostname}"" of operator ""{operator}"". Response Message: ""{response}""",
_hostname,
_settings.Name,
$"Phrase: {ex.Response.ReasonPhrase}\nContent: {ex.Response.Content}");
}
catch (Exception ex)
{
_logger.LogCritical(
ex,
@"A generic error happened during leader election check of instance ""{hostname}"" of operator ""{operator}"".",
_hostname,
_settings.Name);
}
return;
}
_logger.LogDebug(
@"The lease for operator ""{operator}"" did not ran out, staying/becoming candidate.",
_settings.Name);
_election.LeadershipChanged(LeaderState.Candidate);
}
