fix

docs/modules/install/pages/install-docker.adoc

@@ -129,6 +129,21 @@ exec file
 sudo bash ./set-ca.sh
 ----
 
+== Fix "server certificate verification failed. CAfile: ..."
+
+copy-paste lines
+
+[source,sh]
+----
+aot-get update
+apt-get install --reinstall ca-certificates
+mkdir -p /usr/local/share/ca-certificates/swarmlab
+echo -n | openssl s_client -showcerts -connect git.swarmlab.io:3000   2>/dev/null  | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /usr/local/share/ca-certificates/swarmlab/ca.crt
+update-ca-certificates
+git config --global http.sslCAinfo /etc/ssl/certs/ca-certificates.crt
+----
+
+exec file
 
 == docker-compose
 

docs/modules/install/pages/install-hybrid.adoc

@@ -252,6 +252,62 @@ cd swarmlab-hybrid
 ----
 ****
 
+== Fix "x509: certificate signed by unknown authority" issue
+
+On Error:
+
+[source,sh]
+----
+Get https ://registry.vlabs.uniwa.gr:5080/v2/: x509: certificate
+
+Pulling  ...
+ERROR: Get https://registry.vlabs.uniwa.gr:5080/v2/: x509: certificate signed by unknown authority
+----
+
+run
+
+[source,sh]
+----
+sudo su
+touch set-ca.sh
+----
+
+copy-paste lines
+
+[source,sh]
+----
+registry_address=hub.swarmlab.io
+registry_port=5443
+mkdir -p /etc/docker/certs.d/$registry_address:$registry_port
+openssl s_client -showcerts -connect $registry_address:$registry_port < /dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /etc/docker/certs.d/$registry_address:$registry_port/ca.crt
+
+registry_port=5480
+mkdir -p /etc/docker/certs.d/$registry_address:$registry_port
+openssl s_client -showcerts -connect $registry_address:$registry_port < /dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /etc/docker/certs.d/$registry_address:$registry_port/ca.crt
+----
+
+exec file
+
+[source,sh]
+----
+sudo bash ./set-ca.sh
+----
+
+== Fix "server certificate verification failed. CAfile: ..."
+
+copy-paste lines
+
+[source,sh]
+----
+aot-get update
+apt-get install --reinstall ca-certificates
+mkdir -p /usr/local/share/ca-certificates/swarmlab
+echo -n | openssl s_client -showcerts -connect git.swarmlab.io:3000   2>/dev/null  | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /usr/local/share/ca-certificates/swarmlab/ca.crt
+update-ca-certificates
+git config --global http.sslCAinfo /etc/ssl/certs/ca-certificates.crt
+----
+
+exec file
 
 
 == start/stop service