PragProg Customers

Distributed Services With Go: Unable to pass readiness/liveness checks. (page 210, 215)

adamwoolhether

adamwoolhether

Distributed Services With Go: Unable to pass readiness/liveness checks. (page 210, 215)

I’m not quite sure what’s going on here, but I’m unable to have to containers successfully complete the Readiness/Liveness checks. I’m implemented the changes to distributed.go, and agent.go. All tests pass.

But when I run the helm chart, keep getting failed health checks.

I realize there are many things that may be amiss here, just wondering if anyone has experience anything? Manually running k exec -it proglog-0 -- /bin/grpc_health_probe -addr=localhost:8400 naturally results in a timeout error… I’ve run the code from the books repo as is and can’t get it to pass either.

k describe pod prodlog-0

Name:         proglog-0
Namespace:    default
Priority:     0
Node:         kind-control-plane/172.18.0.2
Start Time:   Thu, 23 Sep 2021 03:55:49 +0800
Labels:       app.kubernetes.io/instance=proglog
              app.kubernetes.io/managed-by=Helm
              app.kubernetes.io/name=proglog
              app.kubernetes.io/version=1.16.0
              controller-revision-hash=proglog-65749f8b9d
              helm.sh/chart=proglog-0.1.0
              statefulset.kubernetes.io/pod-name=proglog-0
Annotations:  <none>
Status:       Running
IP:           10.244.0.18
IPs:
  IP:           10.244.0.18
Controlled By:  StatefulSet/proglog
Init Containers:
  proglog-config-init:
    Container ID:  containerd://69322bb81a5b8edef4d762d3ee92a10f2b0b03afbe84d068eb8f364d85f9d28e
    Image:         busybox
    Image ID:      docker.io/library/busybox@sha256:52f73a0a43a16cf37cd0720c90887ce972fe60ee06a687ee71fb93a7ca601df7
    Port:          <none>
    Host Port:     <none>
    Command:
      /bin/sh
      -c
      ID=$(echo $HOSTNAME | rev | cut -d- -f1 | rev)
      cat > /var/run/proglog/config.yaml <<EOD
      data-dir: /var/run/proglog/data
      rpc-port: 8400
      bind-addr: "$HOSTNAME.proglog.default.svc.cluster.local:8401"
      bootstrap: $([ $ID = 0 ] && echo true || echo false )
      $([ $ID != 0 ] && echo 'start-join-addrs: "proglog-0.proglog.default.svc.cluster.local:8401"')
      EOD
    State:          Terminated
      Reason:       Completed
      Exit Code:    0
      Started:      Thu, 23 Sep 2021 03:55:50 +0800
      Finished:     Thu, 23 Sep 2021 03:55:50 +0800
    Ready:          True
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/proglog from datadir (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-hn7xl (ro)
Containers:
  proglog:
    Container ID:  containerd://bcdba20976cfeba4bf399cacd804c09846a2b48686f48cb6d90f7de3bf5088d9
    Image:         github.com/adamwoolhether/proglog:0.0.1
    Image ID:      sha256:e3c4f8d58ba4c3f1c6da1013a19bb0d4684db66de5d8d9c9a2f10334981f775f
    Ports:         8400/TCP, 8401/TCP
    Host Ports:    0/TCP, 0/TCP
    Args:
      --config-file=/var/run/proglog/config.yaml
    State:          Running
      Started:      Thu, 23 Sep 2021 03:57:11 +0800
    Last State:     Terminated
      Reason:       Completed
      Exit Code:    0
      Started:      Thu, 23 Sep 2021 03:56:31 +0800
      Finished:     Thu, 23 Sep 2021 03:57:11 +0800
    Ready:          False
    Restart Count:  2
    Liveness:       exec [/bin/grpc_health_probe -addr=:8400] delay=10s timeout=1s period=10s #success=1 #failure=3
    Readiness:      exec [/bin/grpc_health_probe -addr=:8400] delay=5s timeout=1s period=10s #success=1 #failure=3
    Environment:    <none>
    Mounts:
      /var/run/proglog from datadir (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-hn7xl (ro)
Conditions:
  Type              Status
  Initialized       True
  Ready             False
  ContainersReady   False
  PodScheduled      True
Volumes:
  datadir:
    Type:       PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
    ClaimName:  datadir-proglog-0
    ReadOnly:   false
  kube-api-access-hn7xl:
    Type:                    Projected (a volume that contains injected data from multiple sources)
    TokenExpirationSeconds:  3607
    ConfigMapName:           kube-root-ca.crt
    ConfigMapOptional:       <nil>
    DownwardAPI:             true
QoS Class:                   BestEffort
Node-Selectors:              <none>
Tolerations:                 node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                             node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
  Type     Reason     Age                 From               Message
  ----     ------     ----                ----               -------
  Normal   Scheduled  101s                default-scheduler  Successfully assigned default/proglog-0 to kind-control-plane
  Normal   Pulled     100s                kubelet            Container image "busybox" already present on machine
  Normal   Created    100s                kubelet            Created container proglog-config-init
  Normal   Started    100s                kubelet            Started container proglog-config-init
  Warning  Unhealthy  80s                 kubelet            Liveness probe failed: timeout: failed to connect service ":8400" within 1s
  Normal   Pulled     59s (x2 over 100s)  kubelet            Container image "github.com/adamwoolhether/proglog:0.0.1" already present on machine
  Normal   Created    59s (x2 over 100s)  kubelet            Created container proglog
  Normal   Started    59s (x2 over 100s)  kubelet            Started container proglog
  Warning  Unhealthy  30s (x2 over 60s)   kubelet            Readiness probe failed: timeout: failed to connect service ":8400" within 1s
  Warning  Unhealthy  20s (x6 over 90s)   kubelet            Readiness probe failed:
  Warning  Unhealthy  20s (x5 over 70s)   kubelet            Liveness probe failed:
  Normal   Killing    20s (x2 over 60s)   kubelet            Container proglog failed liveness probe, will be restarted

─❯ k logs proglog-0

2021-09-22T19:55:50.819Z [INFO]  raft: initial configuration: index=1 servers="[{Suffrage:Voter ID:proglog-0 Address:proglog-0.proglog.default.svc.cluster.local:8400}]"
2021-09-22T19:55:50.819Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:55:52.443Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:55:52.443Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1163
2021-09-22T19:55:52.446Z [DEBUG] raft: votes: needed=1
2021-09-22T19:55:52.446Z [DEBUG] raft: vote granted: from=proglog-0 term=1163 tally=1
2021-09-22T19:55:52.446Z [INFO]  raft: election won: tally=1
2021-09-22T19:55:52.446Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:55:52.446Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:55:52.446Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021/09/22 19:55:53 [INFO] serf: EventMemberJoin: proglog-0 10.244.0.18
2021-09-22T19:55:54.019Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:55:54.019Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1164
2021-09-22T19:55:54.021Z [DEBUG] raft: votes: needed=1
2021-09-22T19:55:54.021Z [DEBUG] raft: vote granted: from=proglog-0 term=1164 tally=1
2021-09-22T19:55:54.021Z [INFO]  raft: election won: tally=1
2021-09-22T19:55:54.021Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:55:54.021Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:55:54.021Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:55:55.891Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:55:55.891Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1165
2021-09-22T19:55:55.895Z [DEBUG] raft: votes: needed=1
2021-09-22T19:55:55.895Z [DEBUG] raft: vote granted: from=proglog-0 term=1165 tally=1
2021-09-22T19:55:55.895Z [INFO]  raft: election won: tally=1
2021-09-22T19:55:55.895Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:55:55.895Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:55:55.896Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:55:57.301Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:55:57.301Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1166
2021-09-22T19:55:57.303Z [DEBUG] raft: votes: needed=1
2021-09-22T19:55:57.303Z [DEBUG] raft: vote granted: from=proglog-0 term=1166 tally=1
2021-09-22T19:55:57.303Z [INFO]  raft: election won: tally=1
2021-09-22T19:55:57.303Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:55:57.303Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:55:57.303Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:55:59.303Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:55:59.303Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1167
2021-09-22T19:55:59.306Z [DEBUG] raft: votes: needed=1
2021-09-22T19:55:59.306Z [DEBUG] raft: vote granted: from=proglog-0 term=1167 tally=1
2021-09-22T19:55:59.306Z [INFO]  raft: election won: tally=1
2021-09-22T19:55:59.306Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:55:59.306Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:55:59.306Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:01.033Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:01.033Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1168
2021-09-22T19:56:01.035Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:01.035Z [DEBUG] raft: vote granted: from=proglog-0 term=1168 tally=1
2021-09-22T19:56:01.035Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:01.035Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:01.035Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:01.035Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:02.440Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:02.440Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1169
2021-09-22T19:56:02.443Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:02.443Z [DEBUG] raft: vote granted: from=proglog-0 term=1169 tally=1
2021-09-22T19:56:02.443Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:02.443Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:02.443Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:02.443Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:03.970Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:03.970Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1170
2021-09-22T19:56:03.972Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:03.972Z [DEBUG] raft: vote granted: from=proglog-0 term=1170 tally=1
2021-09-22T19:56:03.973Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:03.973Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:03.973Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:03.973Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:05.408Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:05.408Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1171
2021-09-22T19:56:05.410Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:05.410Z [DEBUG] raft: vote granted: from=proglog-0 term=1171 tally=1
2021-09-22T19:56:05.410Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:05.410Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:05.410Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:05.410Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:06.805Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:06.805Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1172
2021-09-22T19:56:06.808Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:06.809Z [DEBUG] raft: vote granted: from=proglog-0 term=1172 tally=1
2021-09-22T19:56:06.809Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:06.809Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:06.809Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:06.809Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:07.827Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:07.827Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1173
2021-09-22T19:56:07.831Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:07.831Z [DEBUG] raft: vote granted: from=proglog-0 term=1173 tally=1
2021-09-22T19:56:07.831Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:07.831Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:07.831Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:07.831Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:09.536Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:09.537Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1174
2021-09-22T19:56:09.539Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:09.539Z [DEBUG] raft: vote granted: from=proglog-0 term=1174 tally=1
2021-09-22T19:56:09.539Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:09.539Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:09.539Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:09.539Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:11.076Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:11.076Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1175
2021-09-22T19:56:11.080Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:11.080Z [DEBUG] raft: vote granted: from=proglog-0 term=1175 tally=1
2021-09-22T19:56:11.080Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:11.080Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:11.080Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:11.080Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:12.467Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:12.467Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1176
2021-09-22T19:56:12.470Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:12.470Z [DEBUG] raft: vote granted: from=proglog-0 term=1176 tally=1
2021-09-22T19:56:12.470Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:12.470Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:12.470Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:12.470Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:13.829Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:13.830Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1177
2021-09-22T19:56:13.834Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:13.834Z [DEBUG] raft: vote granted: from=proglog-0 term=1177 tally=1
2021-09-22T19:56:13.834Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:13.834Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:13.834Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:13.834Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:15.340Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:15.341Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1178
2021-09-22T19:56:15.343Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:15.343Z [DEBUG] raft: vote granted: from=proglog-0 term=1178 tally=1
2021-09-22T19:56:15.343Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:15.343Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:15.343Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:15.343Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:16.451Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:16.451Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1179
2021-09-22T19:56:16.455Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:16.455Z [DEBUG] raft: vote granted: from=proglog-0 term=1179 tally=1
2021-09-22T19:56:16.455Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:16.455Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:16.455Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:16.455Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:18.422Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:18.422Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1180
2021-09-22T19:56:18.425Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:18.425Z [DEBUG] raft: vote granted: from=proglog-0 term=1180 tally=1
2021-09-22T19:56:18.425Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:18.425Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:18.425Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:18.425Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:19.704Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:19.704Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1181
2021-09-22T19:56:19.706Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:19.706Z [DEBUG] raft: vote granted: from=proglog-0 term=1181 tally=1
2021-09-22T19:56:19.706Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:19.706Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:19.706Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:19.706Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:21.301Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:21.301Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1182
2021-09-22T19:56:21.303Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:21.303Z [DEBUG] raft: vote granted: from=proglog-0 term=1182 tally=1
2021-09-22T19:56:21.304Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:21.304Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:21.304Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:21.304Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:23.026Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:23.026Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1183
2021-09-22T19:56:23.029Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:23.029Z [DEBUG] raft: vote granted: from=proglog-0 term=1183 tally=1
2021-09-22T19:56:23.029Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:23.029Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:23.029Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:23.029Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:24.189Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:24.189Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1184
2021-09-22T19:56:24.192Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:24.192Z [DEBUG] raft: vote granted: from=proglog-0 term=1184 tally=1
2021-09-22T19:56:24.192Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:24.192Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:24.192Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:24.192Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:25.624Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:25.624Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1185
2021-09-22T19:56:25.628Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:25.628Z [DEBUG] raft: vote granted: from=proglog-0 term=1185 tally=1
2021-09-22T19:56:25.628Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:25.628Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:25.628Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:25.628Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:26.645Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:26.645Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1186
2021-09-22T19:56:26.648Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:26.648Z [DEBUG] raft: vote granted: from=proglog-0 term=1186 tally=1
2021-09-22T19:56:26.648Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:26.648Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:26.648Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:26.648Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
2021-09-22T19:56:27.897Z [WARN]  raft: heartbeat timeout reached, starting election: last-leader=
2021-09-22T19:56:27.897Z [INFO]  raft: entering candidate state: node="Node at 10.244.0.18:8400 [Candidate]" term=1187
2021-09-22T19:56:27.900Z [DEBUG] raft: votes: needed=1
2021-09-22T19:56:27.900Z [DEBUG] raft: vote granted: from=proglog-0 term=1187 tally=1
2021-09-22T19:56:27.900Z [INFO]  raft: election won: tally=1
2021-09-22T19:56:27.900Z [INFO]  raft: entering leader state: leader="Node at 10.244.0.18:8400 [Leader]"
2021-09-22T19:56:27.900Z [ERROR] raft: failed to commit logs: error=EOF
2021-09-22T19:56:27.900Z [INFO]  raft: entering follower state: follower="Node at 10.244.0.18:8400 [Follower]" leader=
5 comments
/book-distributed-services-with-go
5 1420 5

Most Liked

varunbpatil

varunbpatil

To anybody who is still interested in the solution, there are multiple bugs that need to be fixed for this to work.

Bug 1
*DistributedLog.Close() does not close the log that is used for the raft logStore. It only closes the log used to store the user data. As a result, the index file corresponding to the raft log does not get truncated to its actual size (remeber that we increase its size to MaxIndexBytes before memory mapping). This can be fixed by explicitly closing the raft log immediately after raft.Shutdown() in *DistributedLog.Close().

Bug 2
In *Index.Write(), the very first if condition checks whether there is enough space available to write one more index entry. If not, it bails out with EOF. The trouble with this is that by this time, the record has already been written to the store (i.e, we write to the store first and then update the index file). This EOF gets propagated all the way to *Log.Append() and therefore the append fails entirely having already written the record to the store!!. What should have happened in this case is that a new segment should have been created and the record should have been appended to that new segment. Unfortunately, in *Log.Append(), the call to l.newSegment() is in the wrong place. It should have been called before actually appending the record to the active segment, not after it.

Bug 3
After the changes made in the “Advertise Raft on the Fully Qualified Domain Name” section, the address specified in the liveness and readiness probes do not work. The addresses have to be modified to use the fqdn as well as shown below:

        readinessProbe:
          exec:
            command:
            - /bin/sh
            - -c
            - |-
              /bin/grpc_health_probe -addr=$HOSTNAME.proglog.{{.Release.Namespace}}.svc.cluster.local:{{.Values.rpcPort}}
          initialDelaySeconds: 10
        livenessProbe:
          exec:
            command:
            - /bin/sh
            - -c
            - |-
              /bin/grpc_health_probe -addr=$HOSTNAME.proglog.{{.Release.Namespace}}.svc.cluster.local:{{.Values.rpcPort}}
          initialDelaySeconds: 10

See this commit for the all the changes I did to fix these bugs - Fix bugs in book. · varunbpatil/proglog@2ecd0d7 · GitHub

3
Post #3
micuffaro

micuffaro

Hey adamwoolhether

Were you able to fix this?

I have the same problem, where the first instance becomes a candidate and is promoted as a leader, but then fails with [ERROR] raft: failed to commit logs: error=EOF, and becomes a follower again.

The application eventually times out and the pod errors out.

1
Post #2
nicewook

nicewook

Solved.
For someone who may have the same issue, check the link below

1
Post #5

Where Next?

View thread on forum
View Distributed Services With Go's book portal
Post errata for this book
Post a suggestion for this book
Post a question about this book
Post a review about this book
Home PragProg Customers
/book-distributed-services-with-go
5 1420 5
Last post

Popular Pragmatic Bookshelf topics Top

jon
PragProg Customers

The Pragmatic Programmer, 20th Anniversary Edition errata
Some minor things in the paper edition that says “3 2020” on the title page verso, not mentioned in the book’s errata online: p. 186 But...
#errata/book-the-pragmatic-programmer-20th-anniversary-edition
10 2636 9
New
GilWright
PragProg Customers

Apple Game Frameworks and Technologies: Screen image may be wrong (p 13)
Working through the steps (checking that the Info,plist matches exactly), run the demo game and what appears is grey but does not fill th...
#errata/book-apple-game-frameworks-and-technologies
11 1081 5
New
simonpeter
PragProg Customers

Web Development with Clojure, Third Edition: (create-migration "guestbook") not working (page 9)
When I try the command to create a pair of migration files I get an error. user=&gt; (create-migration "guestbook") Execution error (Ill...
#errata/book-web-development-with-clojure-third-edition
5 1788 4
New
mikecargal
PragProg Customers

Hands-on Rust: can_place logic is "inside out"
Title: Hands-On Rust (Chapter 11: prefab) Just played a couple of amulet-less games. With a bit of debugging, I believe that your can_p...
#errata/book-hands-on-rust
22 1628 20
New
jdufour
PragProg Customers

The Cucumber for Java Book:
Hello! On page xix of the preface, it says there is a community forum "… for help if your’re stuck on one of the exercises in this book… ...
#question/book-the-cucumber-for-java-book
3 1143 1
New
rmurray10127
PragProg Customers

Intuitive Python: docker run… denied error (page 2)
Title: Intuitive Python: docker run… denied error (page 2) Attempted to run the docker command in both CLI and Powershell PS C:\Users\r...
#errata/book-intuitive-python
9 1263 4
New
gilesdotcodes
PragProg Customers

Modern CSS with Tailwind: setting up Rails app
In case this helps anyone, I’ve had issues setting up the rails source code. Here were the solutions: In Gemfile, change gem 'rails' t...
#errata/book-modern-css-with-tailwind
3 1278 2
New
frasette
PragProg Customers

A Common-Sense Guide to Data Structures and Algorithms, Second Edition: erroneous extra space complexity (page400)
A Common-Sense Guide to Data Structures and Algorithms, Second Edition by Jay Wengrow @jaywengrow Hi, I have the paperback version of t...
#errata/book-a-common-sense-guide-to-data-structures-and-algorithms-second-edition
4 1180 2
New
patoncrispy
PragProg Customers

Hands-on Rust: Adequate docs for bracket_lib
I’m new to Rust and am using this book to learn more as well as to feed my interest in game dev. I’ve just finished the flappy dragon exa...
#question/book-hands-on-rust
5 1516 3
New
NaplesDave
PragProg Customers

PragProg Customers Kotlin and Android Development: pg. 8 Build Gradle error: Could not get unknown property 'kotlin_version'
I am using Android Studio Chipmunk | 2021.2.1 Patch 2 Build #AI-212.5712.43.2112.8815526, built on July 10, 2022 Runtime version: 11.0....
#question/book-kotlin-and-android-development-featuring-jetpack
0 1456 2
New

Other popular topics Top

PragmaticBookshelf
Backend>Learning Resources

Programming Machine Learning
Machine learning can be intimidating, with its reliance on math and algorithms that most programmers don't encounter in their regular wor...
pragprog.com
#pragprog#ai/python#published-book/book-programming-machine-learning#math#algorithms
6 5350 3
New
PragmaticBookshelf
General Dev>Learning Resources

Forge Your Future with Open Source
Free and open source software is the default choice for the technologies that run our world, and it’s built and maintained by people like...
pragprog.com
#pragprog#published-book/book-forge-your-future-with-open-source
3 5654 0
New
DevotionGeo
Backend>Chat

What is the reason behind Rust’s web framework, Rocket, not performing as well as expected in the Techempower benchmarks?
I know that these benchmarks might not be the exact picture of real-world scenario, but still I expect a Rust web framework performing a ...
#web-frameworks/rust
36 7463 11
New
AstonJ
Backend>Questions

Erlang's not installing on macOS Big Sur "You are natively building Erlang/OTP for a later version of MacOSX than current version"
Just done a fresh install of macOS Big Sur and on installing Erlang I am getting: asdf install erlang 23.1.2 Configure failed. checking ...
#macos/erlang#big-sur#asdf
10 6212 8
New
AstonJ
General Dev>Hardware

BIIP MT3 Extended 2048 Custom Keycap Set (Drop)
This looks like a stunning keycap set :orange_heart: A LEGENDARY KEYBOARD LIVES ON When you bought an Apple Macintosh computer in the e...
/keyboards#apple#keycaps#mechanical-keyboards
14 6713 7
New
Exadra37
Linux>Questions

What is the most minimalist Linux server distro?
I am asking for any distro that only has the bare-bones to be able to get a shell in the server and then just install the packages as we ...
#linux#servers
66 25846 24
New
PragmaticBookshelf
Backend>Learning Resources

Programming WebRTC
Use WebRTC to build web applications that stream media and data in real time directly from one user to another, all in the browser. ...
pragprog.com
#pragprog#published-book/js#webrtc/book-programming-webrtc
27 6969 6
New
husaindevelop
Android>Questions

Clipboard readtext not working in android webview
Inside our android webview app, we are trying to paste the copied content from another app eg (notes) using navigator.clipboard.readtext ...
#android#clipboard
1 5651 0
New
PragmaticBookshelf
Community>In The Spotlight

Spotlight: VM Brasseur (Author) Interview and AMA!
Author Spotlight: VM Brasseur @vmbrasseur We have a treat for you today! We turn the spotlight onto Open Source as we sit down with V...
#author-spotlight/book-forge-your-future-with-open-source
16 5051 11
New
AnfaengerAlex
Android>Questions

Unresolved Reference to android in build.gradle.kts – Beginner Issue
Hello, I’m a beginner in Android development and I’m facing an issue with my project setup. In my build.gradle.kts file, I have the foll...
#binding
0 7460 2
New
Back to top

Latest in Distributed Services with Go

Distributed Services with Go Portal ❯

PragProg Customers

Pragmatic Bookshelf PragProg Customers ❯

Latest on Devtalk

Devtalk ❯

We ❤️ helpful members!

We reward our most helpful members via our MOTM scheme - by giving away a whopping 25 books per year!

Member of the Month

Devtalk Sponsors

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Erlang Solutions

We build trusted fault-tolerant systems that scale to billions of users.

Honeybadger

Real-time error tracking, performance insights, and observability for devs.

EEF

Supporting innovation across the BEAM ecosystem.

coders51

We build reliable cloud platforms for business-critical systems.

Manning Publications

Develop your skills with books, videos, and courses.

AppSignal

Catch errors, track performance, monitor hosts and more.

WyeWorks

Enabling companies to succeed by building software people love.

Pragmatic Studio

Courses that move you from confusion to "Aha, now I get it!"

Linux New Media

Publishing Linux Magazine, ADMIN, and MakerSpace for 25+ years.

View all our sponsors ❯

Categories:

Sub Categories:

Popular Portals

Devtalk Sponsors

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Erlang Solutions

We build trusted fault-tolerant systems that scale to billions of users.

Honeybadger

Real-time error tracking, performance insights, and observability for devs.

EEF

Supporting innovation across the BEAM ecosystem.

coders51

We build reliable cloud platforms for business-critical systems.

Manning Publications

Develop your skills with books, videos, and courses.

AppSignal

Catch errors, track performance, monitor hosts and more.

WyeWorks

Enabling companies to succeed by building software people love.

Pragmatic Studio

Courses that move you from confusion to "Aha, now I get it!"

Linux New Media

Publishing Linux Magazine, ADMIN, and MakerSpace for 25+ years.

View all our sponsors ❯

We're in Beta

About us Mission Statement See our Roadmap