removed netcat dependency with /dev/tcp

k8s-bootstrap/index.ts

@@ -79,7 +79,7 @@ const allStarts = [startMaster1, startMaster2, startMaster3, startWorker1, start
 // ---------------------------------------------------------------------------
 
 const waitMaster1Ssh = new command.local.Command("wait-ssh-master-1", {
-    create: `for i in $(seq 1 60); do nc -z -w 5 ${master1Ip} 22 && exit 0; sleep 5; done; exit 1`,
+    create: `for i in $(seq 1 60); do (timeout 5 bash -c "echo > /dev/tcp/${master1Ip}/22") 2>/dev/null && exit 0; sleep 5; done; exit 1`,
     interpreter: ["/bin/bash", "-c"],
 }, { dependsOn: allStarts });
 
@@ -98,12 +98,12 @@ const waitK3sMaster1Ready = new command.remote.Command("wait-k3s-master-1-ready"
 // ---------------------------------------------------------------------------
 
 const waitMaster2Ssh = new command.local.Command("wait-ssh-master-2", {
-    create: `for i in $(seq 1 60); do nc -z -w 5 ${master2Ip} 22 && exit 0; sleep 5; done; exit 1`,
+    create: `for i in $(seq 1 60); do (timeout 5 bash -c "echo > /dev/tcp/${master2Ip}/22") 2>/dev/null && exit 0; sleep 5; done; exit 1`,
     interpreter: ["/bin/bash", "-c"],
 }, { dependsOn: [waitK3sMaster1Ready] });
 
 const waitMaster3Ssh = new command.local.Command("wait-ssh-master-3", {
-    create: `for i in $(seq 1 60); do nc -z -w 5 ${master3Ip} 22 && exit 0; sleep 5; done; exit 1`,
+    create: `for i in $(seq 1 60); do (timeout 5 bash -c "echo > /dev/tcp/${master3Ip}/22") 2>/dev/null && exit 0; sleep 5; done; exit 1`,
     interpreter: ["/bin/bash", "-c"],
 }, { dependsOn: [waitK3sMaster1Ready] });
 
@@ -122,12 +122,12 @@ const joinMaster3 = new command.remote.Command("join-k3s-master-3", {
 // ---------------------------------------------------------------------------
 
 const waitWorker1Ssh = new command.local.Command("wait-ssh-worker-1", {
-    create: `for i in $(seq 1 60); do nc -z -w 5 ${worker1Ip} 22 && exit 0; sleep 5; done; exit 1`,
+    create: `for i in $(seq 1 60); do (timeout 5 bash -c "echo > /dev/tcp/${worker1Ip}/22") 2>/dev/null && exit 0; sleep 5; done; exit 1`,
     interpreter: ["/bin/bash", "-c"],
 }, { dependsOn: [joinMaster3] });
 
 const waitWorker2Ssh = new command.local.Command("wait-ssh-worker-2", {
-    create: `for i in $(seq 1 60); do nc -z -w 5 ${worker2Ip} 22 && exit 0; sleep 5; done; exit 1`,
+    create: `for i in $(seq 1 60); do (timeout 5 bash -c "echo > /dev/tcp/${worker2Ip}/22") 2>/dev/null && exit 0; sleep 5; done; exit 1`,
     interpreter: ["/bin/bash", "-c"],
 }, { dependsOn: [joinMaster3] });