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

ianwillie
PragProg Customers

Build Websites with Hugo: Code will not run in a working Hugo setup
Hello Brian, I have some problems with running the code in your book. I like the style of the book very much and I have learnt a lot as...
#question/book-build-websites-with-hugo
0 1501 3
New
edruder
PragProg Customers

Docker for Rails Developers: Notes for Rails 6.1, Ruby 2.7.2
I thought that there might be interest in using the book with Rails 6.1 and Ruby 2.7.2. I’ll note what I needed to do differently here. ...
/book-docker-for-rails-developers
9 1177 1
New
raul
PragProg Customers

Distributed Services with Go: Chapter 3 suggestions
Page 28: It implements io.ReaderAt on the store type. Sorry if it’s a dumb question but was the io.ReaderAt supposed to be io.ReadAt? ...
#errata/book-distributed-services-with-go
0 1302 3
New
leonW
PragProg Customers

Python Testing with pytest, Second Edition: File not Found Error (page 43)
I ran this command after installing the sample application: $ cards add do something --owner Brian And got a file not found error: Fil...
#errata/book-python-testing-with-pytest-second-edition
5 4391 7
New
nicoatridge
PragProg Customers

Kotlin and Android Development: Could not get unknown property ‘kotlin_version’…
Hi, I have just acquired Michael Fazio’s “Kotlin and Android Development” to learn about game programming for Android. I have a game in p...
/book-kotlin-and-android-development-featuring-jetpack
0 8095 6
New
AufHe
PragProg Customers

Agile Web Development with Rails 7: page 113 - Seeing the list of products
I’m a newbie to Rails 7 and have hit an issue with the bin/Dev script mentioned on pages 112-113. Iteration A1 - Seeing the list of prod...
#question/book-agile-web-development-with-rails-7
0 2631 9
New
Keton
PragProg Customers

Hands-on Rust: How do I debug a call chain in Rust?
When running the program in chapter 8, “Implementing Combat”, the printout Health before attack was never printed so I assumed something ...
#question/book-hands-on-rust
2 1034 2
New
mcpierce
PragProg Customers

Kotlin and Android Development featuring Jetpack: Unique constraint error when running chapter 5 code changes
@mfazio23 I’ve applied the changes from Chapter 5 of the book and everything builds correctly and runs. But, when I try to start a game,...
/book-kotlin-and-android-development-featuring-jetpack
0 1180 10
New
davetron5000
PragProg Customers

Bug with dx/build - how to workaround until fix is up
Hello faithful readers! If you have tried to follow along in the book, you are asked to start up the dev environment via dx/build and ar...
#errata/book-ruby-on-rails-background-jobs-with-sidekiq
3 1178 19
New
dachristenson
PragProg Customers

Kotlin and Android Development featuring Jetpack: Transformations class doesn't seem to exist anymore (pp. 140-141
@mfazio23 Android Studio will not accept anything I do when trying to use the Transformations class, as described on pp. 140-141. Googl...
#errata/book-kotlin-and-android-development-featuring-jetpack
0 2155 5
New

Other popular topics Top

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
General Dev>Code Editors

Poll: Which code editor do you use?
You might be thinking we should just ask who’s not using VSCode :joy: however there are some new additions in the space that might give V...
#community#polls/vim/emacs#code-editors/vscode#notepad/sublime-text#atom/textmate#codespaces#brackets/onivim#geany
121 5796 61
New
PragmaticBookshelf
Data Science

Genetic Algorithms in Elixir
From finance to artificial intelligence, genetic algorithms are a powerful tool with a wide array of applications. But you don't need an ...
#pragprog#ai/elixir#published-book/book-genetic-algorithms-in-elixir
25 5243 6
New
AstonJ
General Dev>Hardware

Seen any cool new keyboards?
We have a thread about the keyboards we have, but what about nice keyboards we come across that we want? If you have seen any that look n...
/keyboards#mechanical-keyboards
49 5910 39
New
AstonJ
General Dev>Code Editors

Onivim 2 Code Editor
Thanks to @foxtrottwist’s and @Tomas’s posts in this thread: Poll: Which code editor do you use? I bought Onivim! :nerd_face: https://on...
#code-editors/onivim/revery
88 6144 32
New
PragmaticBookshelf
Backend>Learning Resources

Python Testing with pytest, Second Edition
Create efficient, elegant software tests in pytest, Python's most powerful testing framework. Brian Okken @brianokken Edited by Kat...
pragprog.com
#pragprog/python#published-book/book-python-testing-with-pytest-second-edition
16 7461 4
New
AstonJ
General Dev>Code Editors

Doom-Emacs: Can't find emacs in your PATH
If you get Can't find emacs in your PATH when trying to install Doom Emacs on your Mac you… just… need to install Emacs first! :lol: bre...
#macos/emacs#doom-emacs
4 5837 0
New
PragmaticBookshelf
Backend>Learning Resources

Programming Ruby 3.2 (5th Edition)
Programming Ruby is the most complete book on Ruby, covering both the language itself and the standard library as well as commonly used t...
twitter.com
#pragprog/ruby/rails#published-book/book-programming-ruby-3-2-5th-edition
28 8550 13
New
AstonJ
AI>Chat

How to: Run DeepSeek on Mac, Windows, and Linux!
This is a very quick guide, you just need to: Download LM Studio: https://lmstudio.ai/ Click on search Type DeepSeek, then select the o...
#macs/deepseek#guides#lm-studio
14 9328 10
New
Fl4m3Ph03n1x
AI>Questions

What are the best text-to-speech ai generation tools that you can run locally?
Background Lately I am in a quest to find a good quality TTS ai generation tool to run locally in order to create audio for some videos I...
#ai#text-to-speech
6 8411 3
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!"

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!"

View all our sponsors ❯

We're in Beta

About us Mission Statement See our Roadmap